Hierarchical network model for diplom

Good day !
I want to build infrastructure for my diplom with using open source features such packetfence, snort and others. I have laboratory with a good server and cisco catalyst 2960 for realization this features. And my main model will be designed in packet tracer 6. How you know suite of devices is very poor in this emulator ... ( i choose switch 3560 and 2911 router ). Can you advice me how can i design hierarchical network with this suite of tools ? What technology can i use ... (can i use rpvstp+ in connection between aggregation and core layer, or link aggregation)

I would like to know how can i achieve redundancy, security, scalability effects. I'm really needed in help (

Similar Messages

Best networking model for a java network application

Hi all,
I am in need of a decision regards the network technology used for a CRM.
I am thinking about JAX-RPC to build network model for the system.I'll concider functianality details after deciding the network model.
Which'll be better?.JAX-RPC?.i did'nt used it before.How good is that technology for a client-server CRM which need frequent remote method calls?.
What about using servlets?.
My requirement is i'll make XML documents from client and send to the server and server parse the XML file then make necessory method calls and return another XML data to the client.
I cant use a database server for network functioning.Because the application should run in internet also.So installing a client-server database and only writing client application will not work.
My application should work equally in internet and local network.
So which technology can i implement for better results?.
What about servlets?.
Servlets can take inputs as web forms.But can servlets work with XML inputs with a swing client(no browser)?.
What'll be the best technology without EJB?.Becoz only Tomcat can be used for deployment.
Plz anyone suggest a good opinion.
What'll the best for me?.

Many thanks for your efforts,but i already know all what you hav said.Then you should be in fine shape for starting this project.
But what i need is good insights.You hav told me that
"start the project and you'll get" .OK.But after doing
a lot of projects,Onething i know is getting as much
insights towards a project will help always.Because
there maybe issues that we dont concider or some
better patterns.I can't help you based on what you've posted so far. You're talking about gathering good requirements and doing a detailed analysis and design. That's not what this forum is for. You should be doing that with your customers and teammates.
And i'll be using JDOM.Coz it's quite easy.Very good.
But some more insights??.
I need insights in areas like,
When XML file reach to controller servlet,It should
dispatch the XML file to many javabean classes
according to it's purpose.Do you spot anything
there?.I don't know what those Bean classes will be doing with the XML, so it's hard to say.
If you're looking to create an XML message broker, where clients send XML requests to be dispatched and then get the response back, you might be talking about an asynchronous application with JMS and queues. That's very different from a servlet, but then I don't know much about what you're really trying to do.
In either case, whether you use a queue or a servlet, you'll have to think about how you'll go about routing a message. You'll have to figure out how to recognize and associate a particular XML message with the right Java Bean or destination.
any suggestiens for creating XML files?.Sometimes you just have to bite the bullet and create them. No magic here.
I already thank to you for ur opinions.But plz take care on these small issues also if u done such
apps.Lets learn more together so we can make applications very very fast with good insights in
small deeper areas.I don't mean to be rude, but I can't do any detailed analysis and design with you. That's up to you, your customer, and your teammates.

Ask the Expert: Hierarchical Network Design, Includes Core, Distribution, and Access

Welcome to the Cisco® Support Community Ask the Expert conversation. This is an opportunity to learn and ask questions about hierarchical network design.
Recommending a network topology is required for meeting a customer's corporate network design needs in their business and technical goals and often consists of many interrelated components. The hierarchical design made this easier like "divide and conquer" the job and develop the design in layers.
Network design experts have developed the hierarchical network design model to help to develop a topology in discrete layers. Each layer can be focused on specific functions, to select the right systems and features for the layer.
A typical hierarchical topology is
A core layer of high-end routers and switches that are optimized for availability and performance.
A distribution layer of routers and switches that implement policies.
An access layer that connects users via lower-end switches and wireless access points.
Ahmad Manzoor is a Senior Pre-Sales Engineer at AGCN, Pakistan. He has more than 10 years of experience in first-rate management, commercial and technical skills in the field of data communication and services lifecycle—from solution design through sales pitch, designing RFPs, architecture, and solution—all with the goal toward winning projects (creating win/win situations) of obsolete solutions. Ahmad also has vast experience in designing end-to-end data centers, from building infrastructure design to data communication and network Infrastructure design. He has worked for several large companies in Pakistan and United Arab Emirates markets; for example, National Engineer, WATEEN Telecom, Emircom, Infotech, Global Solutions, NETS International, Al-Aberah, and AGCN, also known as Getronics, Pakistan.
Remember to use the rating system to let Ahmad know if he has given you an adequate response.
Because of the volume expected during this event, Ahmad might not be able to answer every question. Remember that you can continue the conversation in the Solutions and Architectures under the sub-community Data Center & Virtualization, shortly after the event. This event lasts through August 15, 2014. Visit this forum often to view responses to your questions and the questions of other Cisco Support Community members.

Dear Leo,
We are discussing the following without any product line, discussing the concept of hierarchical design, which will help you to take decision which model is better for you Two Layer or Three Layer hierarchical model.
Two-Layer Hierarchy
In many networks, you need only two layers to fulfill all of the layer functions—core and aggregation
Only one zone exists within the core, and many zones are in the aggregation layer. Examine each of the layer functions to see where it occurs in a two-layer design:
Traffic forwarding—Ideally, all interzone traffic forwarding occurs in the core. Traffic flows from each zone within the aggregation layer up the hierarchy into the network core and then back down the hierarchy into other aggregation zones.
Aggregation—Aggregation occurs along the core/aggregation layer border, allowing only interzone traffic to pass between the aggregation and core layers. This also provides an edge for traffic engineering services to be deployed along.
Routing policy—Routing policy is deployed along the edge of the core and the aggregation layers, generally as routes are advertised from the aggregation layer into the core.
User attachment—User devices and servers are attached to zones within the aggregation layer. This separation of end devices into the aggregation permits the separation of traffic between traffic through a link and traffic to a link, or device. Typically, it is best not to mix transit and destination traffic in the same area of the network.
Controlling traffic admittance—Traffic admittance control always occurs where user and server devices are attached to the network, which is in the aggregation layer. You can also place traffic admittance controls at the aggregation points exiting from the aggregation layer into the core of the network, but this is not common.
You can see, then, how dividing the network into layers enables you to make each layer specialized and to hide information between the layers. For instance, the traffic admittance policy implemented along the edge of the aggregation layer is entirely hidden from the network core.
You also use the core/aggregation layer edge to hide information about the topology of routing zones from each other, through summarization. Each zone within the aggregation layer should have minimal routing information, possibly just how to make it to the network core through a default route, and no information about the topology of the network core. At the same time, the zones within the aggregation layer should summarize their reachability information into as few routing advertisements as possible at their edge with the core and hide their topology information from the network core.
Three-Layer Hierarchy
A three-layer hierarchy divides these same responsibilities through zones in three vertical network layers,
Traffic Forwarding—As with a two-layer hierarchy, all interzone traffic within a three- layer hierarchy should flow up the hierarchy, through the layers, and back down the hierarchy.
Aggregation—A three-layer hierarchy has two aggregation points:
At the edge of the access layer going into the distribution layer
At the edge of the distribution layer going into the core
At the edge of the access layer, you aggregate traffic in two places: within each access zone and flowing into the distribution layer. In the same way, you aggregate interzone traffic at the distribution layer and traffic leaving the distribution layer toward the network core. The distribution layer and core are ideal places to deploy traffic engineering within a network.
Routing policy—The routing policy is deployed within the distribution layer in a three- layer design and along the distribution/core edge. You can also deploy routing policies along the access/distribution edge, particularly route and topology summarization, to hide information from other zones that are attached to the same distribution layer zone.
User attachment—User devices and servers are attached to zones within the access layer. This separation of end devices into the access layer permits the separation of traffic between traffic through a link and traffic to a link, or device. Typically, you do not want to mix transit and destination traffic in the same area of the network.
Controlling traffic admittance—Traffic admittance control always occurs where user and server devices are attached to the network, which is in the access layer. You can also place traffic admittance controls at the aggregation points along the aggregation/core edge.
As you can see, the concepts that are applied to two- and three-layer designs are similar, but you have more application points in a three-layer design.
Now the confusion takes place in our minds where do we use Two Layer and where the Three layer hierarchical model.
Now we are discussing that How Many Layers to Use in Network Design?
Which network design is better: two layers or three layers? As with almost all things in network design, it all depends. Examine some of the following factors involved in deciding whether to build a two- or three-layer network:
Network geography—Networks that cover a smaller geographic space, such as a single campus or a small number of interconnected campuses, tend to work well as two-layer designs. Networks spanning large geographic areas, such as a country, continent, or even the entire globe, often work better as three layer designs.
Network topology depth—Networks with a compressed, or flattened, topology tend to work better as two-layer hierarchies. For instance, service provider networks cover large geographic areas, but reducing number of hops through the network is critical in providing the services they sell; therefore, they are often built on a two-layer design. Networks with substantial depth in their topologies, however, tend to work better as three-layer designs.
Network topology design—Highly meshed networks, with many requirements for interzone traffic flows, tend to work better as two-layer designs. Simplifying the hierarchy to two levels tends to focus the design elements into meshier zones. Networks that focus traffic flows on well-placed distributed resources, or centralized resources, such as a network with a large number of remote sites connecting to a number of centralized Data Centers, tend to work better as three-layer designs.
Policy implementation—If policies of a network tend to focus on traffic engineering, two-layer designs tend to work better. Networks that attempt to limit access to resources attached to the network and other types of policies tend to work better as three-layer designs.
Again, however, these are simple rules of thumb. No definitive way exists to decide whether a network should have two or three layers. Likewise, you cannot point to a single factor and say, “Because of this, the network we are working on should have three layers instead of two.”
I hope that this helps you to understand the purposes of Two Layer & Three layer Hierarchical Model.
Best regards,
Ahmad Manzoor

I am trying to connect to my Wifi Network. It is a Galaxy Nexus. I am trying to connect to this Hotspot. I have an iMac that works fine with my network but for some reason with this computer I cannot connect.

So far I have pulled the system configuration file, I have reset safari, I deleted all old passwords from the wifi network in Keychain I restarted both devices. I am at the end here and I cannot get it to work I have an iMac that works fine with my network but for some reason this computer will not connect. It is system wide specifically to my personal hotspot. I can connect fine to any other network (wifi) but just not mine. I have not changed any wifi settings. I have been trying to figure this out. I have a MacBook Pro Late 2006 model running Lion (10.7.5) So any ideas anyone? Please help!

12. At a WiFi hotspot, you can't get connected. The most frequent reason is the login screen for the WiFi hotspot is only able to be connected with a single type of browser. If Safari doesn't work, try Firefox, Chrome, Omniweb, or Opera.
From my tip:
https://discussions.apple.com/docs/DOC-6411

Questions on the LRS network model.

On page 6-26 of the "Oracle Spatial Topology and Network Data Models" documentation, the example shows that measures are recorded in the 'roads' table (i.e. the one with the geometry of the feature).
1. Why in this example is 'null' used for Node 5 ('...automatically calculated and filled...') but not the others?
2. Why in this example is measure even necessary? There is no link to the underlying route from this table (i.e. measures should only be recorded in the context of a given route).
3. It seems like this measure is merely the offset from the starting vertex (not true LRS); do we have the wrong interpretation?
On Page 6-30, the example shows that measures are recorded for each Node and each Link. We had envisioned nodes and links being separate from the route they play a role upon. For example, if the same node was part of two distinct routes, does this mean storing two rows in "road_nodes"? But they're the exact same location and the same node in our network. The same question applies to the 'road_links' table. If the answer is 'duplicate the rows' in nodes and links (once per route), why doesn't 10g Spatial record 'measure' in the "road_paths" table? Note that, on page 6-31, it says that it is '...for possible future use...'...
This example also implies the rows in the roads table are replicated as the (m)easure of the geometry column would change based on the route involved? If this is not the case why store the measure in the geometry column at all?

Hi,
My name is Gary Wong, and the original poster was asking these questions on my behalf. I'd like to continue the thread below in-line....
A: This is a basic LRS concept. You can have some NULL
measure values, and LRS can compute the actual measure
corresponding to a NULL value. This has nothing to do
with Network modeling, so you can assume a valid
measure value here for this example.So this was just an example showing both 'manually calculated and entered' and 'let Spatial figure it out'? As this is merely the offset from the starting point, wouldn't a user always use NULL to let Spatial figure it out? It seems like this model will always use whole links in a contiguous fashion, so when would the measure not be the cumulative total?
2. Why in this example is measure even necessary? There
is no link to the underlying route from this table
(i.e. measures should only be recorded in the context
of a given route).So in this model (and example), the entry in roads is the route itself? Other LRS models allow the re-use of a common route, so multiple entries in the roads table would reference the same route (in another table). A real-life example is a single straight road that has different names, or has different road surface, or road classifications.
Folowing this example, if I wanted to spatially reference some other business attribution on an existing route, say R1, would I have to create another entry in roads and duplicate the data? Even if it has the same start/end locations and path?
A: Measure is always an offset from the start vertex
and this is true for any LRS system. I am not sure what
you mean by "not true LRS".My mistake in using these words; there is no true LRS, just different models/implementations of it =8^). Other LRS systems can have a measure beginning, say 2.5 metres after the starting node (node, not vertex; I define a vertex as as one of co-ordinates defining the link, and node as a topologically significant vertex such as the start and end vertices).
Hmmm, does this answer my first question above? If you wished to start a road (as per the example) slightly off of a node, would you enter a non-zero measure as the initial co-ordinate?
Assuming I'm on the right track (i.e. cannot re-use a route), does anyone know if Oracle plans to implement this kind of LRS in 10g Spatial?
I see a cryptic ".. for possible future use..." reference on page 6-31 regarding the create_path_table() and create_path_link_table() methods.
Is this future use to allow multiple uses and references of a route?
Thanks and sorry for the loooong email..
gary

Predefined network model themes

I am having a problem whilst trying to load one of the above into mapviewer. I have a network model that is working, valid and I can perform analysis using the SQL API. I am trying to create a theme with
insert into user_sdo_themes values(
'RAILNET',
'UK Rail Network',
'LINK',
'L_GEOM',
'<?xml version="1.0" standalone="yes"?>
<styling_rules
theme_type="network"
network_name="RAILNET"
network_level="1">
<rule>
<features>
<link
style="C.YELLOW"
direction_style="M.DIRECTION"
direction_position="0.5"
direction_markersize="7">
</link>
<node
style="M.NODE"
markersize="5">
</node>
</features>
</rule>
</styling_rules>');
The mapviewer returns the following (in FINEST)
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.lbs.mapserver.oms] request= <?xml version="1.0" standalone="yes"?>
<map_request
datasource="mvdemo"
width="1159"
height="793"
bgcolor="#ffffff"
bgimage=""
antialiase="true"
format="SVGZ_URL" zoomlevels="1" zoomfactor="2.0" zoomratio="1.0" infoon="true" navbar="no" onclick="shiftPressed(evt.shiftKey);svgClicked" onrectselect="shiftPressed(evt.shiftKey);svgRect">
<center size="10.0">
<geoFeature>
<geometricProperty typeName="center">
<Point>
<coordinates>-1.4,53.0</coordinates>
</Point>
</geometricProperty>
</geoFeature>
</center>
<legend bgstyle="fill:#ffffff;fill-opacity:128;stroke:#ff0000" profile="SMALL" position="NORTH_EAST"><column><entry is_separator="true" /><entry text=" Map Legend " is_title="true" /><entry is_separator="true" /><entry style="L_DOWN" text="Down Track Level" /><entry style="L_UP" text="Up Track Level" /><entry style="L_BI" text="Bi-Dir Track Level" /><entry style="L_UNVAL" text="Unvalidated link" /><entry style="M.NODE" text="Track Level Node" /></column></legend>
<themes>
<theme name="RAILNET" min_scale="50000.0" max_scale="0.0" />
</themes>
</map_request>
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.sdovis.JSDOGeometry] exception while getting srid from a geometry node: For input string: ""
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 DEBUG [oracle.lbs.mapserver.core.MapperPool] getMapper(mvdemo) begins...
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 DEBUG [oracle.lbs.mapserver.core.MapperPool] getMapper() succeeded.
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.lbs.mapserver.core.RealWorker] adding additional themes...
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.lbs.mapserver.core.RealWorker] adding a predefined theme RAILNET
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.sdovis.DBMapMaker] adding predefined theme [name=RAILNET]
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.sdovis.SRS] got srs object for :8307
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.sdovis.SRS] *** isGeodetic=true, unit=DECIMAL DEGREE
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.sdovis.SRS] before adjusting: minX = -8.707692307692307, maxX=5.907692307692308 minY=48.0, maxY=58.0 w=14.615384615384615, h=10.0
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.sdovis.SRS] After adjusting: minX = -8.707692307692307, maxX=5.907692307692308 minY=48.0, maxY=58.0 w=14.615384615384615, h=10.0
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 DEBUG [oracle.sdovis.DBMapMaker] LoadThemeData running thread: Thread-8
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.sdovis.theme.ntp] [Master scale] 1.2105926860025222 [Scale factor for theme RAILNET] 1.0
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.sdovis.theme.ntp] ptvpxfmfxed: xl=-9.0
05/09/29 10:22:20 Thu Sep 29 10:22:20 BST 2005 FINEST [oracle.sdovis.theme.ntp] [Geometry Network link query]: select ROWID, L_GEOM from LINK WHERE MDSYS.SDO_FILTER(L_GEOM, MDSYS.SDO_GEOMETRY(2003, 8307, NULL, MDSYS.SDO_ELEM_INFO_ARRAY(1, 1003, 3), MDSYS.SDO_ORDINATE_ARRAY(-9.0,48.0,5.907692307692308,58.0)), 'querytype=WINDOW') = 'TRUE'
05/09/29 10:22:21 Thu Sep 29 10:22:21 BST 2005 WARN [oracle.sdovis.theme.ntp] java.lang.NullPointerException
at oracle.sdovis.theme.NetworkThemeProducer.processGeomLinkQuery(NetworkThemeProducer.java:2467)
at oracle.sdovis.theme.NetworkThemeProducer.prepareData(NetworkThemeProducer.java:329)
at oracle.sdovis.NetworkTheme.prepareData(NetworkTheme.java:64)
at oracle.sdovis.DBMapMaker$LoadThemeData.run(DBMapMaker.java:1740)
05/09/29 10:22:21 Thu Sep 29 10:22:21 BST 2005 ERROR [oracle.sdovis.DBMapMaker] Message:null
Description: Nested exception is:
Message:null
Description: Nested exception is:
java.lang.NullPointerException
Message:null
Description: Nested exception is:
java.lang.NullPointerException
java.lang.NullPointerException
at oracle.sdovis.theme.NetworkThemeProducer.processGeomLinkQuery(NetworkThemeProducer.java:2467)
at oracle.sdovis.theme.NetworkThemeProducer.prepareData(NetworkThemeProducer.java:329)
at oracle.sdovis.NetworkTheme.prepareData(NetworkTheme.java:64)
at oracle.sdovis.DBMapMaker$LoadThemeData.run(DBMapMaker.java:1740)
05/09/29 10:22:21 Thu Sep 29 10:22:21 BST 2005 INFO [oracle.sdovis.DBMapMaker] **** time spent on loading features: 202ms.
05/09/29 10:22:21 Thu Sep 29 10:22:21 BST 2005 FINEST [oracle.sdovis.RE] xfm: 79.3 0.0 0.0 -79.3 690.5199999999999 4599.4
05/09/29 10:22:21 Thu Sep 29 10:22:21 BST 2005 DEBUG [oracle.sdovis.VectorRenderer] time to label theme RAILNET with 0 styled features: 0ms
If i leave the <link> tag out of the theme definition then the mapviewer loads and renders the nodes, but with the <link> included nothing is rendered.
Help!

That works, here is the output. I assume then that there is a bug?
<map_request
datasource="mvdemo"
width="1159"
height="793"
bgcolor="#ffffff"
bgimage=""
antialiase="true"
format="SVGZ_URL" zoomlevels="1" zoomfactor="2.0" zoomratio="1.0" infoon="true" navbar="no" onclick="shiftPressed(evt.shiftKey);svgClicked" onrectselect="shiftPressed(evt.shiftKey);svgRect">
<center size="0.00639386189258312">
<geoFeature>
<geometricProperty typeName="center">
<Point>
<coordinates>-1.9082991021265139,51.53651515982236</coordinates>
</Point>
</geometricProperty>
</geoFeature>
</center>
<themes>
<theme name="RAILNET" >
<jdbc_network_query
network_name="RAILNET"
network_level="1"
jdbc_srid="8307"
datasource="mvdemo"
link_style="C.YELLOW"
direction_style="M.DIRECTION"
direction_position="0.5"
direction_markersize="10"
node_style="M.NODE"
node_markersize="5"
asis="false">
</jdbc_network_query>
</theme>
</themes>
</map_request>
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.JSDOGeometry] exception while getting srid from a geometry node: For input string: ""
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 DEBUG [oracle.lbs.mapserver.core.MapperPool] getMapper(mvdemo) begins...
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 DEBUG [oracle.lbs.mapserver.core.MapperPool] getMapper() succeeded.
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.lbs.mapserver.core.RealWorker] adding additional themes...
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.lbs.mapserver.core.RealWorker] adding a JDBC Network Theme:
ThemeDescriptor=
name=RAILNET
type=6
minScale=Infinity
maxScale=-Infinity
srid=8307
localThem=null
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 INFO [oracle.sdovis.theme.ntd] [Network Metadata Query] select * from user_sdo_network_metadata where network = 'RAILNET'
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.SRS] got srs object for :8307
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.SRS] *** isGeodetic=true, unit=DECIMAL DEGREE
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.SRS] *** local adjustment will be performed on this req. ***
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.SRS] before adjusting: minX = -1.9158108694149043, maxX=-1.9007873348381232 minY=51.53331822887607, maxY=51.53971209076865 w=0.015023534576780994, h=0.00639386189258312
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.SRS] After adjusting: minX = -1.9158108694149043, maxX=-1.9007873348381232 minY=51.53331822887607, maxY=51.53971209076865 w=0.015023534576780994, h=0.00639386189258312
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 DEBUG [oracle.sdovis.DBMapMaker] LoadThemeData running thread: Thread-22
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.theme.ntp] [Master scale] 7.740362442471369E-4 [Scale factor for theme RAILNET] 1.0
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.theme.ntp] [Geometry Network link query]: select L_GEOM from LINK WHERE MDSYS.SDO_FILTER(L_GEOM, MDSYS.SDO_GEOMETRY(2003, 8307, NULL, MDSYS.SDO_ELEM_INFO_ARRAY(1, 1003, 3), MDSYS.SDO_ORDINATE_ARRAY(-1.9158108694149043,51.53331822887607,-1.9007873348381232,51.53971209076865)), 'querytype=WINDOW') = 'TRUE'
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.theme.ntp] [Network node query]: select N_GEOM from NODE WHERE MDSYS.SDO_FILTER(N_GEOM, MDSYS.SDO_GEOMETRY(2003, 8307, NULL, MDSYS.SDO_ELEM_INFO_ARRAY(1, 1003, 3), MDSYS.SDO_ORDINATE_ARRAY(-1.9158108694149043,51.53331822887607,-1.9007873348381232,51.53971209076865)), 'querytype=WINDOW') = 'TRUE'
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 INFO [oracle.sdovis.DBMapMaker] **** time spent on loading features: 50ms.
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 FINEST [oracle.sdovis.RE] xfm: 77145.62735398066 0.0 0.0 -124025.19999999895 147796.43141258793 6392223.099999947
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 DEBUG [oracle.sdovis.VectorRenderer] time to label theme RAILNET with 41 styled features: 0ms
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 INFO [oracle.sdovis.DBMapMaker] **** time spent on rendering SVG: 79ms
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 DEBUG [oracle.lbs.mapserver.core.MapperPool] freeMapper() begins...
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 DEBUG [oracle.lbs.mapserver.core.RealWorker] [RealWorker] preparation time: 13ms
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 DEBUG [oracle.lbs.mapserver.core.RealWorker] [RealWorker] querying/rendering time: 139ms
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 DEBUG [oracle.lbs.mapserver.core.RealWorker] [RealWorker] packing time: 1ms
05/09/29 15:52:10 Thu Sep 29 15:52:10 BST 2005 DEBUG [oracle.lbs.mapserver.core.RealWorker] [RealWorker] --------------- total time: 153ms
15:52:10,319 INFO MapAction - THE ACTION IS = ZoomTo
15:52:10,319 DEBUG MapAction - class omnieng.mapviewer.beans.PublicMapControler
15:52:10,319 DEBUG MapAction - class omnieng.mapviewer.beans.PublicMapControler
15:52:10,319 FATAL MapAction - NOW DOING POST PROCESS
15:52:10,319 FATAL MapAction - NOW DONE POST PROCESS
15:52:10,321 DEBUG HttpRequestControllerFactory - Getting controller
15:52:10,322 DEBUG ControllerFactory - MAP_CONTROLLER
15:52:10,322 INFO ControllerFactory - Current type is 5
15:52:10,322 DEBUG ControllerFactory - current type is 5
15:52:10,322 DEBUG HttpRequestControllerFactory - setting the controller omnieng.mapviewer.beans.PublicMapControler
15:52:10,322 DEBUG HttpRequestControllerFactory - done

Ideal model for accesing data

i'm trying to transfer some data (about 100,000 rows) to mysql database. i already has my Data Access Object(DAO), so i reuse it. when my DAO add about 500 rows, this exception occurs:
com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception:
** BEGIN NESTED EXCEPTION **
java.net.SocketException
MESSAGE: java.net.BindException: Address already in use: connect
STACKTRACE:
java.net.SocketException: java.net.BindException: Address already in use: connect
        at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:151)
        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:280)
        at com.mysql.jdbc.Connection.createNewIO(Connection.java:1691)
        at com.mysql.jdbc.Connection.<init>(Connection.java:405)
        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:268)
        at java.sql.DriverManager.getConnection(DriverManager.java:512)
        at java.sql.DriverManager.getConnection(DriverManager.java:171)
        at trade.connector.ConnectionProvider.getConnection(ConnectionProvider.java:71)
        at trade.access.LoginValidator.validate(LoginValidator.java:29)
        at trade.access.UserAccess.getUser(UserAccess.java:124)
        at trade.access.UserAccess.addUser(UserAccess.java:162)
        at trade.access.UserAccess.main(UserAccess.java:254)
** END NESTED EXCEPTION **
        at com.mysql.jdbc.Connection.createNewIO(Connection.java:1754)
        at com.mysql.jdbc.Connection.<init>(Connection.java:405)
        at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:268)
        at java.sql.DriverManager.getConnection(DriverManager.java:512)
        at java.sql.DriverManager.getConnection(DriverManager.java:171)
        at trade.connector.ConnectionProvider.getConnection(ConnectionProvider.java:71)
        at trade.access.LoginValidator.validate(LoginValidator.java:29)
        at trade.access.UserAccess.getUser(UserAccess.java:124)
        at trade.access.UserAccess.addUser(UserAccess.java:162)
        at trade.access.UserAccess.main(UserAccess.java:254)
Exception in thread "main" i retry transfering but this exception occurs again and again. if i retry after about 1 minute, it can resume transfering about 500 rows again.
Is this problem cause by database protection from network flood attack? i use single shot connection method (connect when needed, and disconnect when job done). so if add method need 2 query (2 times connect), it takes about 1000 re-connection.
i change connection from single shot connection to connection pooling. the problem still occurs... so i assume the protection apply for statement (i recreate statement for about 1000 times). finally i write extra code for transfering. reuse statement (Prepared Statement),not close and recreate and problem solve.
So what 'ideal model' for DAO (logical layer)? for every access method, we create Statement, use it, and close it. this will cause database server block our connection when using this method repeatly (over 1000 times). if we leave the statement open, it will cost network traffic to keep it alive and we often use only a part accesing method, not all.

you are right malcolmmc. i'm running out of local port. i check with netstat & here is the output:
TCP    TOSHIBA2450:3306       localhost:3987         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3988         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3989         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3990         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3991         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3992         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3993         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3994         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3995         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3996         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3997         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3998         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:3999         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4000         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4001         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4002         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4003         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4004         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4005         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4006         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4007         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4008         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4009         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4010         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4011         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4012         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4013         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4014         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4015         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4016         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4017         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4018         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4020         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4021         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4022         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4023         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4024         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4025         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4026         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4027         TIME_WAIT
TCP    TOSHIBA2450:3306       localhost:4028         TIME_WAITi already try to change my code to use only one connection. and the result is same. i assume create statement will create a new connection. i mean althought i'm not re-creating java.sql.Connection, but when i create java.sql.Statement, it will create new TCP/IP Connection. but i do call:
preparedstatement.close();
pool.returnConnection(con); // con.close();i wonder how to close this connection (tcp/ip)...

What's the best authentication model for a PRO*C process?

We presently have a system where 5 or so PRO*C-based processes on remote nodes (HP OpenVMS) connect to a database (RH Linux) using Oracle Client and insert data. The current authentication method is for the C based program to read a connection string from a file and use that string to connect via an embedded sqlplus call.
This works fine, however having the string contained in a file isn't all that great an idea, even with the protection we give it. It would be easy for a programmer to recompile & debug the process and read the string, so it's not really all that secure. It also just doesn't seem the best way to do this....
I know this isn't much information to go on, but can anyone suggest a better model for this scenario that avoids putting connection strings and passwords in a file?
Thanks in advance

thanks for your helpfull evaluation.
On the security question is it possible for you to use the Oracle Wallet ?
http://www.stanford.edu/dept/itss/docs/oracle/10g/network.101/b10772/asowalet.htm
Please ask more on that thread or post a question to the section : for security Questions/issues.
Forum Home » Technologies » Security
Hope this helps.
Regards,
Hub

Question re: MapViewer and Network Model functions

Hi all,
Quick question re: MapViewer and it's support for the Network Model and the shortest-path functions. If I create a base map with a network theme based on my (large) network, and then use a jdbc_network_query on the same network to do some shortest path analysis will MapViewer use the (hopefully) cached copy of the Network to calculate the shortest path? i.e can I expect good response times once the cache is warmed up?
Thanks,
Steve

Hi Steve,
MapViewer uses the Network Java library to run the shortest path algorithm. This library is independent of the MapViewer cache, and also not thread safe. So for now the network is always loaded. The load time may be reduced if the request has a MBR, but it is not the ideal solution. There is a working going on, and we hope to avoid this load in future versions.
Thanks.

Open soruce code of Neural Network Model of the Cerebellum

I would like to share with the community the code of a Neural Network Model of the Cerebellum (CNN). I have been using the CNN for studying the cerebellum and for adaptive robot control. The CNN was developed using Object Oriented Programming (OOP) and a customized Address Event Representation (AER) format. Using OOP and AER allows the construction and evaluation of CNN with more than 80 k neurons, and more than 400 k synaptic connections in real time. The code includes the tools for creating the network, connecting synapses, create the AER format, and a demo for controlling a Virtual Model of a FAN.
The link to the Cerebellar Network: https://bitbucket.org/rdpinzonm/the-bicnn-model
Some details of the architecture of the cerebellar model:
In comparison with traditional ANN or RNN, the CNN has a very peculiar architecture with at least three layers (see below, Fig. 1). Inputs from the external world such as the position of the arms, legs, or sensors from a robot, are carried to the cerebellum via mossy fibers (mf). mfs are then processed in the input layer that includes Golgi (Go) and Granule cells (Gr). The ratio of Gr to mf is around 1000:1, whereas Go to Gr is 15000:1. Because of these numbers it has been proposed that the input layer of the cerebellum transform the input mfs into a sparse representation easing the work of the other layers. The second layer, the molecular layer that could be regarded as a hidden layer, includes Ba/St, Basket and Stellate cells. Their numbers are similar to Go, and their role is still a matter of debate. The last layer, the output layer, includes Purkinje cells (Pk). There are around 150.000 Gr per one Pk. This is a remarkable feature because the Pk is the only output of the cerebellar cortex. The output of the cerebellar cortex will eventualy reach the motor centers to correct movements. The CNN includes a plausible learning rule of the cerebellum at synapses between Gr and Pk. It works a an supervised anti-Hebbian rule or a anti-correlation rule in the following way: the teaching signal carrying the information about erroneous motions of the leg, arm, robot, etc, is conveyed by the climbing fiber (cf) to a single Pk. Then, the synaptic weights og Gr-Pk are decreased if there is both cf and Gr activity, whereas if there is not cf (i.e., error) the weights are increased. What this rule means, is that those Gr producing errors have their weight decreased, while those decreasing the error are promoted by increasing their weight.
Fig. 1. Neural Network Model of the Cerebellum. mf, Mossy fibers (inputs); Go, Golgi Cells; Gr, Granule cells; Ba/St, Basket and Stellate cells; Pk, Purkinje Cell (Sole output of the cerebellar cortex); cf, climbing fiber (teaching signal); pf, parallel fibers (synapses of pf-Pk are the only adjustable weights in this model, and main loci in the cerebellum); and IO, inferior olivary nucleus.
Cheers,
As you can see, the CNN has a very interesting and simple architecture with huge potential for adaptive controller. Do not hessitate in using the model, explore its code, adn post any thought, question, comment, issue. The labview project includes a demo for constructing a CNN and employ it in a classical fedback control of a DC FAN. Fig. 2-3 are some pictures of the application:
Fig 2. 3D construction of the CNN in LabVIEW representing a cube of the cerebellar cortex with edge length 100 um. Red mf, cyan Gr, green Go, yellow Ba/St, purple Pk.
Fig 3. Screen capture of the demo application in LabVIEW for the CNN used for controlling a Virtual Model of a DC FAN.
Thanks,

Hi gerh. Nice observation! Indeed there are many good softwares out there that are optimized for constructing neural network models. However, none of them have the flexibility and the capability of integration with Hardware that LabVIEW provides. You see, the CNN is being developed to be easily incorporated into engineering applications.
I haven't tried CV, but I think it could be possible to use the CNN with a 1D representation of the image.

Which switch model for more than 4 10G-Ports?

we have a little network (100 clients, 1 VMware-Cluster with 2 Hosts, 1 Storage) and we want to replace old switches.
we want to connect 4 cisco catalyst 2960X to core switch with 10G, and 4 2960X with 1G.
Core switch is main routing instance for all.
So we need following features for the core switch:
- 8 10G-Ports
- Redundancy
- Static Routing
Which is the cheapest model for core?
Thanks!
Martin

I'm not sure if you get it "cheap" ...
You could use:
A stack of 2*WS-C3650-48TQ (each has 4*10GE)
A stack of 2*SG500X-24 (each has 4*10GE)
one or two SG500XG-8F8T (each has 8*10GE copper and 8*10GE SFP+)
2) and 3) are from the SmallBusiness line of switches. So option 2) will probably the cheapest.
Edit: Just looked at the stacking of the 500X. Seems that the 10GE-ports are used for stacking, so you would need four of them to get eicht usable 10GE-Ports. It still could be cheaper then the 3650, but probably not better ...

Q: Using Path tables with Network Model (api)

Hello
Just a quick question to get on track.
In order to use the Path tables from a network model and to fill the geometry field, is this the right way to start working?
1. use the sdonm api to load network and analyse it (like the demo java file LoadAndAnlayze.java)
2. get the link array from the path object
3. itterate through the link array and use the
NetworkUtility.concatenateGeometry in order to end up with one sdo_geometry line object
4. Insert the appropriate path attributes into the Path table of the network via an SQL INSERT.
Is this the right way or is there an othaer/better way?
tx
Luc

A path by default does not have its geometry computed when it's created.
You can use method to compute its geometry (from link geometry).
If you have computed a path using NDM API(for example, shortestPath), you can
1. compute path geometry by using path.computeGeometry(double tolerance)
2. add the path to the network (network.addPath(path)
3. use NetworkManager.writeNetwork(conn, network) to populate path and path-link tables (assuming they have been created and registered in the network metadata already!)

Designing a network model

Hi,
Let me start saying that im pretty newbie still considering networking. I have studied CCNA and CCNP in my school and am now working on my final work which is to design a basic network model that can be applied into small to medium sized companies.
The network core devices are a Cisco Catalyst 3550 Switch and a Cisco PIX 515E (7.0) The C3550 will handle the traffic inside the network and connection outwards will go trough PIX Firewall.
In the work im going to divide the ports in the switch to 3 different VLANs that will be for the assumed different departments of the company. (production,offices,administration/servers etc more added if needed)
Im making Access-lists for every VLAN and I am wondering should I only use these ACLs to set what kind of traffic goes between the VLANs in the companys inside network and let PIX handle the traffic that enters and leaves the network? Should i have an ACL in the switch already preventing somekind of traffic going forward to the PIX?
I have found it abit hard building access-lists for both inbound and outbound VLAN traffic as i feel i have to open alot of ports to get the most basic traffic flowing without problem in the inside network.(Programs using ports > 1024 in the return traffic getting blocked in the return packets, unless i open alot of those larger port numbers)
Should i just limit what traffic can exit a VLAN and leave the rest of traffic flow inspection for PIX to handle? Will this provide enough security to the network provided the end stations have proper software protection and the switch is secured to prevent adding of unwanted networking devices. Im kind of unsure of the PIX device itself as my studies never crossed path with it so never got to use it before this point.
Any views on how to handle the security in different points of the network would be greatly appriciated.
- Jouni Forss

Thanks for the fast reply,
As we havent gone indepth with securing a network in our studies I feel the need to find as much info on the best practices to secure a network. All our studies have given a pretty narrow look into the ways to do that.
Im pretty sure i will go with applying outbound traffic ACLs to each VLAN and after the switch has been secured will move onto configuring the PIX.
Basicly the main idea is to have all the different departments connect to the server
VLAN for resources. Only the office and admin/server VLAN will have connection to outside world. This is ofcourse just a basic idea to start building the configuration on and the ACLs would probably change depending on the real life application situation.
Also one point was to build a possibility for VPN connections to the server VLAN from outside world which is another thing i need to get into after the switch. These connection would be coming from perhaps home office or such places with DSL connection to perform some remote management on the servers and such.
The customers using this type of network model would be mostly behind slow connections and there wouldnt be any high load traffic going out or inside the network. (DSL etc connections)
By reading info on the PIX i presume that in this situation it would be best to use it in Transparent mode between the C3550 and the DSL modem in question. Or maybe use PIX in routed mode and configure the outside interface to get its IP address with DHCP from the DSL modem? Or maybe some static configuration would be better there.
One thing i would like to know about the PIX is that does it have some basic settings that would make it possible to basicly insert it to the network and it would provide some basic protection already? I guess if theres some good base that i could start building the configuration suited for the network in question.
I find myself lacking alot of basic information concerning Firewalls/PIX even though it should be really essential in my studies. Thats why i would like to know how much does PIX ability to keep the network secured depend on the the right type of configuration or does it perform most of its measures to intercept harmfull traffic automatically with some built in methods? (Not really sure on my choice of words)
I guess at this point i would really appriciate any tips that any of you expirienced PIX users could give me to set me on way configuring my firewall to provide sufficient protection for the network.
- Jouni Forss

Import Network Model from Shapefile

Hello,
How to import shapefile of roads network (network data model) into oracle spatial? (Oracle+Spatial 10.2g)
http://www.oracle.com/technology/software/products/spatial/files/shape2sdojava.zip deals only with normal (non-network) spatial data..
Huge thanks!

Ok, putting together your help, I managed to get myself a network model, hurray! But after this script in the end (could you peep through it and tell if anything's missing), VALIDATE_NETWORK gives me this:
SDO_NET.VALIDATE_NETWORK('SHP_TABLE_NET')
No Link Geom Metadata!
How (where) would I insert that Link Geom Metadata? All I found is USER_SDO_GEOM_METADATA, but there is nowhere to insert Link data. Googled, too.
The script, together with instructions, in case you make a nice use of it ;):
* Import a Shapefile into Oracle Spatial as a normal vector map;
* (ISSIT POSSIBLE TO AVOID THIS STEP? PL/SQL .sql file script? But that with DDL restrictions, clumsy variable definitions in DERLARE section etc. drove me nuts and I gave up, just asking users to do simple Find/Replace..):
Replace all occurrences of SHP_TABLE (case sensitive, can be part of a word) in the script below with the table name of the imported map from Shapefile (copy all script from below to a text editor and perform that replace);
* Copy/Paste (in Linux: select text and then use middle mouse button or Shift+Insert to paste it in a console) the script line-by-line, follow any severe errors (ignore ones, when it writes that table cannot be dropped when it does not actually exist :) and the like).
-- delete any tables existing
EXECUTE SDO_NET.DROP_NETWORK('SHP_TABLE_NET');
DROP TABLE SHP_TABLE_PLINK$;
DROP TABLE SHP_TABLE_EDGE$;
DROP TABLE SHP_TABLE_NODE$;
DROP TABLE SHP_TABLE_LINK$;
DROP TABLE SHP_TABLE_FACE$;
-- delete any existing geometry layer
EXECUTE SDO_TOPO.DELETE_TOPO_GEOMETRY_LAYER('SHP_TABLE', 'SHP_TABLE_TOPO', 'FEATURE');
DROP TABLE SHP_TABLE_TOPO;
-- then drop existing topology
EXECUTE SDO_TOPO.DROP_TOPOLOGY('SHP_TABLE');
-- create new topology
EXECUTE SDO_TOPO.CREATE_TOPOLOGY('SHP_TABLE', 0.5);
-- insert the universal face for an empty topology
INSERT INTO SHP_TABLE_FACE$(face_id, boundary_edge_id, island_edge_id_list, island_node_id_list, mbr_geometry)
VALUES(-1, NULL, SDO_LIST_TYPE(), SDO_LIST_TYPE(), NULL);
-- create an Oracle table with a feature layer
DROP TABLE SHP_TABLE_TOPO;
-- note, do not create unique id (PRIMARY KEY) as the data in teleatlas.dbf is inconsistent
CREATE TABLE SHP_TABLE_TOPO(id NUMBER, feature SDO_TOPO_GEOMETRY);
--CREATE TABLE SHP_TABLE_TOPO(id number, type varchar2(1), feature SDO_TOPO_GEOMETRY);
-- register feature layer with topology
EXECUTE SDO_TOPO.ADD_TOPO_GEOMETRY_LAYER('SHP_TABLE', 'SHP_TABLE_TOPO', 'FEATURE', 'CURVE');
-- create updatable TOPO_MAP object and load the whole topology in cache
-- since we just created the topology, the cache will be empty
EXECUTE SDO_TOPO_MAP.DROP_TOPO_MAP('SHP_TABLE_MAP_CACHE');
EXECUTE SDO_TOPO_MAP.CREATE_TOPO_MAP('SHP_TABLE', 'SHP_TABLE_MAP_CACHE');
EXECUTE SDO_TOPO_MAP.LOAD_TOPO_MAP('SHP_TABLE_MAP_CACHE', 'true');
-- copy/paste everything in one go between BEGIN and COMMIT; (including):
-- this one will demand a considerable amount of time
BEGIN
FOR r IN (SELECT id, geometry FROM SHP_TABLE) LOOP
-- associate topological primitives with features
INSERT INTO SHP_TABLE_TOPO(id, feature)
VALUES(r.id,
SDO_TOPO_MAP.CREATE_FEATURE('SHP_TABLE',
'SHP_TABLE_TOPO',
'FEATURE',
r.geometry)
END LOOP;
END;
COMMIT;
-- commit topology changes
EXECUTE SDO_TOPO_MAP.COMMIT_TOPO_MAP;
EXECUTE SDO_TOPO_MAP.DROP_TOPO_MAP('SHP_TABLE_MAP_CACHE');
-- check how many primitives were converted (should be the same number as primitives in the DB)
SELECT COUNT(*) FROM SHP_TABLE_TOPO;
-- after an initial bulk load into an empty topology, initialize_metadata
EXECUTE SDO_TOPO.INITIALIZE_METADATA('SHP_TABLE');
-- check here what tables have been created:
SELECT table_name FROM user_tables WHERE table_name LIKE 'SHP_TABLE_%$';
CREATE TABLE SHP_TABLE_LINK$
AS SELECT edge_id AS link_id,
start_node_id,
end_node_id,
geometry
FROM SHP_TABLE_EDGE$;
-- FULL NETWORK:
--CREATE TABLE SHP_TABLE_PATH$(PATH_ID NUMBER,
-- PATH_NAME VARCHAR2(200),
-- PATH_TYPE VARCHAR2(200),
-- START_NODE_ID NUMBER NOT NULL,
-- END_NODE_ID NUMBER NOT NULL,
-- COST NUMBER,
-- SIMPLE VARCHAR2(1),
-- PATH_GEOMETRY MDSYS.SDO_GEOMETRY);
--CREATE TABLE roads_incompl_plink$(path_id number not null, link_id number not null, seq_no number not null);
--INSERT INTO USER_SDO_NETWORK_METADATA(
-- network, network_category, geometry_type,
-- node_table_name, node_geom_column,
-- link_table_name, link_geom_column, link_direction,
-- path_table_name, path_geom_column,
-- path_link_table_name)
-- VALUES(
-- 'SHP_TABLE_NET', 'SPATIAL', 'SDO_GEOMETRY',
-- 'SHP_TABLE_NODE$', 'GEOMETRY',
-- 'SHP_TABLE_LINK$', 'GEOMETRY', 'UNDIRECTED',
-- 'SHP_TABLE_PATH$', 'PATH_GEOMETRY',
-- 'SHP_TABLE_PLINK$');
-- MINIMAL NETWORK:
INSERT INTO USER_SDO_NETWORK_METADATA(
network, network_category, geometry_type,
node_table_name, node_geom_column,
link_table_name, link_geom_column, link_direction)
VALUES(
'SHP_TABLE_NET', 'SPATIAL', 'SDO_GEOMETRY',
'SHP_TABLE_NODE$', 'GEOMETRY',
'SHP_TABLE_LINK$', 'GEOMETRY', 'UNDIRECTED');
SELECT SDO_NET.VALIDATE_NETWORK('SHP_TABLE_NET') FROM DUAL;
COMMIT;

Network Model - Shortest Path

Hi all,
I have created spatial network containing non lrs sdo_geometry objects in Oracle 10g (Release 2). In this network model there are 33208 nodes and 42406 links.
Now I need to write a java program to find shortest route between two selected nodes. Here is snippet of my source code.
Connection connection = DriverManager.getConnection(dbUrl, databaseUser, databasePassword);
boolean readForUpdate = false;
Network net= NetworkManager.readNetwork(connection, "SDO_ROAD_NETWORK", readForUpdate);
Path path = NetworkManager.shortestPath(net, startNodeId ,endNodeId);
System.out.println ("total distance " path.getCost() );+
Link[] linkArray = path.getLinkArray();
But this will throws an exception - Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
It was working fine for 1000 nodes and 1000 links. I tried by changing java options like -Xms and Xmx parameters but same result.
Then I tried to find shortest route using pl/sql using following.
DECLARE
testNet VARCHAR2(30) := 'SDO_ROAD_NETWORK';
startNode NUMBER := 120150;
endNode NUMBER :=1740034;
path NUMBER;
linkArray SDO_NUMBER_ARRAY;
BEGIN
sdo_net_mem.network_manager.read_network('SDO_ROAD_NETWORK', 'FALSE');
dbms_output.put_line('Loading finished');
path := SDO_NET_MEM.NETWORK_MANAGER.SHORTEST_PATH_DIJKSTRA('SDO_ROAD_NETWORK', startNode, endNode);
IF path IS NULL THEN
dbms_output.put_line('route not found');
return;
END IF;
linkArray := SDO_NET_MEM.PATH.GET_LINK_IDS(testNet, path);
FOR i IN linkArray.first..linkArray.last
LOOP
dbms_output.put_line('Link -- ' || linkArray(i) || ' ' ||
SDO_NET_MEM.LINK.GET_NAME (testNet, linkArray(i)) || ' ' ||
SDO_NET_MEM.LINK.GET_COST (testNet, linkArray(i)));
END LOOP;
END;
+/+
But this takes nearly 4 minutes to just read the nework (sdo_net_mem.network_manager.read_network).
Finally I dowloaded standalone java client application NDM Network Editor from OTN. This application loads entire network within 25 seconds and finds shortest route within 5 seconds.
Please guide me how can I write improved code reading network. My requirement is to get shortest path between two nodes
Thanks,
Sujnan

Hi Sujnan
In the past there have been some performance issue for the Oracle JVM. Not sure if this addressed in the latest releases (10.r2 or 11).
Performance Status OJVM used for SDO Network data Model 10R2.0.2
Maybe the oracle guys can give an update.
Luc

Hierarchical network model for diplom

Similar Messages

Maybe you are looking for