LoadBlanceing and Cluster

Dear sir,
How To Create Cluster and Island in OC4J.
what are the various Hardware and software
requirement.Which File we have to Configure
Please send a reply its Urgent.
Thanks in Advance
Bye

The atlassian link, the orion docs (which are the same as the
atlassian link, and the OC4J docs (which are sparse!), leave out
some key bits, without which your application will fail:
1. You can't have statefull session beans in a clustered
enterprise application. The only session context which is shared
is the http session.
2. Anything which you save to your session context in a servlet
must be serializable, otherwise the web application cannot be
clustered.
3. Although you can save Home ejb references to a session
context, they will not be properly found in the event of an
island failure...since Orion does not have a default ejb Home
factory. In order to get around this, save any Home references
to the application context in an init() of your startup servlet,
and all of your Home ejb references will be preserved in a
failover.
4. You web-app must have the <distributable /> tag in the
web.xml file.
These are the four "gotcha's" for OC4J/Orion clustering.
Regards,
the elephantwalker
www.elephantwalker.com

Similar Messages

Aggregates, VLAN's, Jumbo-Frames and cluster interconnect opinions

Hi All,
I'm reviewing my options for a new cluster configuration and would like the opinions of people with more expertise than myself out there.
What I have in mind as follows:
2 x X4170 servers with 8 x NIC's in each.
On each 4170 I was going to configure 2 aggregates with 3 nics in each aggregate as follows
igb0 device in aggr1
igb1 device in aggr1
igb2 device in aggr1
igb3 stand-alone device for iSCSI network
e1000g0 device in aggr2
e1000g1 device in aggr2
e1000g2 device in aggr3
e1000g3 stand-alone device of iSCSI network
Now, on top of these aggregates, I was planning on creating VLAN interfaces which will allow me to connect to our two "public" network segments and for the cluster heartbeat network.
I was then going to configure the vlan's in an IPMP group for failover. I know there are some questions around that configuration in the sense that IPMP will not detect a nic failure if a NIC goes offline in the aggregate, but I could monitor that in a different manner.
At this point, my questions are:
[1] Are vlan's, on top of aggregates, supported withing Solaris Cluster? I've not seen anything in the documentation to mention that it is, or is not for that matter. I see that vlan's are supported, inluding support for cluster interconnects over vlan's.
Now with the standalone interface I want to enable jumbo frames, but I've noticed that the igb.conf file has a global setting for all nic ports, whereas I can enable it for a single nic port in the e1000g.conf kernel driver. My questions are as follows:
[2] What is the general feeling with mixing mtu sizes on the same lan/vlan? Ive seen some comments that this is not a good idea, and some say that it doesnt cause a problem.
[3] If the underlying nic, igb0-2 (aggr1) for example, has 9k mtu enabled, I can force the mtu size (1500) for "normal" networks on the vlan interfaces pointing to my "public" network and cluster interconnect vlan. Does anyone have experience of this causing any issues?
Thanks in advance for all comments/suggestions.

For 1) the question is really "Do I need to enable Jumbo Frames if I don't want to use them (neither public nore private network)" - the answer is no.
For 2) each cluster needs to have its own seperate set of VLANs.
Greets
Thorsten

How can I get data in flat file from Pool table and cluster table ?

Hi,
I am working in one Achiving project. My requirement is to get data into flat file from Cluster table and pool table.
Is there any tool avilable to download data into flat file from pool table and cluster table ?
if table name given in the selection screen then data will be downloaded into flat file.
waiting for quick response.
Best Regards,
Bansidhar

Data cannot be retrived directly form the cluster table
as the Cluster results are stored in Cluster Key say for example PCLkey
and form that Key we need to fetch the data
these clustes are not the part of PNP or PNPCE tables
for ur info kindly check

Charts and graph shown as --array and cluster datatype in block diagram

Hi friends,
I new user...
I have a basic doubt...
In many examples the graph and charts are shown as "array data type and cluster data type "------in the block diagram panel...
Please tell me, how these data types are shown as graph and charts in the front panel window.....
regards
raja

These are very basic issues and it should be clear once you study the online help and examples for a while.
Waveform Graphs
Plain waveform graphs assume equally spaced data. The x-values are implicit from x0 and dx of the x-axis. By default x0=0 and dx=1, meaning the x-values are the array indices. You can change the offset and multiplier from the properties dialog or programmatically via property nodes.
If you give a 2D array, there will be multiple graphs. Transpose if needed.
Alternatively, you can give a cluster of [x0, dx, y-array] and the x-axis will adjust accordingly.
As another alternative, you can built a waveform datatype and feed it to the graph.
You can also graph dynamic data.
XY graphs
xy graphs are needed if the x-vlaues are not regularly spaced.They take a variety of data formats, so pick what is most approriate for the data
A cluster of an x-array and a y-array
An array of clusters, each containing an xy pair
A complex datatype (it will graph imaginary vs. real or similar).
Charts
Charts are different, because they maintain a data history buffer an retain a certain amount of data. Some examples of data inputs:
A single scalar: it wil be appended to the existing chart data, possibly throwing out the oldest existing point.
An array: The array data will be appended to the existing chart data.
A cluster of e.g. 5 points: The chart will have 5 dividual plots, one point gets appended to each plot.
etc.
The express xy-graph can be configured as xy chart, etc.
Sure, it is a bit complicated at the beginning, but the complexity also gives you flexibility to do exactly what you want. Just play around with various scenarios and look at the outcome. The best way to learn!
LabVIEW Champion . Do more with less code and in less time .

Inforation on Pool tables and cluster tables required.

I want to know about the pool tables and cluster tables like how to create them and how to look the tables associated with the given tables. Like for the table BSEG we have other tables linked BSID etc. I'm new to this concept please guide me.

Pooled Table:
A pooled table in R/3 has a many-to-one relationship with a table in the database (see Figures 3.1 and 3.2). For one table in the database, there are many tables in the R/3 Data Dictionary. The table in the database has a different name than the tables in the DDIC, it has a different number of fields, and the fields have different names as well. Pooled tables are an SAP proprietary construct.
When you look at a pooled table in R/3, you see a description of a table. However, in the database, it is stored along with other pooled tables in a single table called a table pool. A table pool is a database table with a special structure that enables the data of many R/3 tables to be stored within it. It can only hold pooled tables.
R/3 uses table pools to hold a large number (tens to thousands) of very small tables (about 10 to 100 rows each). Table pools reduce the amount of database resources needed when many small tables have to be open at the same time. SAP uses them for system data. You might create a table pool if you need to create hundreds of small tables that each hold only a few rows of data. To implement these small tables as pooled tables, you first create the definition of a table pool in R/3 to hold them all. When activated, an associated single table (the table pool) will be created in the database. You can then define pooled tables within R/3 and assign them all to your table pool.
Pooled tables are primarily used by SAP to hold customizing data.
Cluster Table:
A cluster table is similar to a pooled table. It has a many-to-one relationship with a table in the database. Many cluster tables are stored in a single table in the database called a table cluster.
A table cluster is similar to a table pool. It holds many tables within it. The tables it holds are all cluster tables.
Like pooled tables, cluster tables are another proprietary SAP construct. They are used to hold data from a few (approximately 2 to 10) very large tables. They would be used when these tables have a part of their primary keys in common, and if the data in these tables are all accessed simultaneously.
Table clusters contain fewer tables than table pools and, unlike table pools, the primary key of each table within the table cluster begins with the same field or fields. Rows from the cluster tables are combined into a single row in the table cluster. The rows are combined based on the part of the primary key they have in common. Thus, when a row is read from any one of the tables in the cluster, all related rows in all cluster tables are also retrieved, but only a single I/O is needed.
A cluster is advantageous in the case where data is accessed from multiple tables simultaneously and those tables have at least one of their primary key fields in common. Cluster tables reduce the number of database reads and thereby improve performance.
Restrictions on Pooled and Cluster Tables
1. Pooled and cluster tables are usually used only by SAP and not used by customers, probably because of the proprietary format of these tables within the database and because of technical restrictions placed upon their use within ABAP/4 programs. On a pooled or cluster table:
2. Secondary indexes cannot be created.
3. You cannot use the ABAP/4 constructs select distinct or group by.
4.You cannot use native SQL.
5.You cannot specify field names after the order by clause. order by primary key is the only permitted variation.
For creation of pooled /cluster table, have a look at below link.
http://help.sap.com/saphelp_erp2004/helpdata/en/81/415d363640933fe10000009b38f839/frameset.htm
For creation of table pool /cluster, have a look at below link.
http://help.sap.com/saphelp_erp2004/helpdata/en/81/415d363640933fe10000009b38f839/frameset.htm
Have a look at below link.
http://www.sap-img.com/abap/the-different-types-of-sap-tables.htm
Best Regards,
Vibha
*Please mark all the helpful answers

Can we create secondary indexes in pooled and cluster table?

hello all
can we create secondary indexes in pooled and cluster table?

Hi,
Yes, you can.
Refer the below links
[http://www.sap-img.com/abap/the-different-types-of-sap-tables.htm|http://www.sap-img.com/abap/the-different-types-of-sap-tables.htm]
[http://help.sap.com/saphelp_40b/helpdata/en/cf/21f083446011d189700000e8322d00/content.htm|http://help.sap.com/saphelp_40b/helpdata/en/cf/21f083446011d189700000e8322d00/content.htm]
Regards,
SB

Is there an easier way to create and cluster large numbers of references than doing it one at a time?

Hey, I have an instrument for which there are a large number of controls on a panel. I want to have the controls reflect the state of the instrument at the time the panel opens. I was planning on creating a sub-vi, then clustering a reference to each of the controls, then having the sub-vi set each value.
The question is, is there a way to highlight say... 12 controls, make a reference, and cluster them all together without the tedious process of creating 12 references, then wiring 12 of them into a cluster?
Or perhaps I should be using something other than clusters entirely?
Thanks,
-Josh

Writing values from control references is slow. Do not use it in high performance applications. Having said that, it sounds like you just want to do it once for initialization purposes, which is OK.
The answer is don't wire in a ton of clustered references. Just wire the a reference to the VI on which the controls live. You can get an array of references to all the front panel controls given the reference to the owning VI. You will need to "downcast" (to more specific type) for each particular data type, but that can be done inside the subVI. Note that the order of the reference array is the tabbing order of the controls on the front panel.
Dan Press
www.primetest.com

Configure the ADMIN and CLUSTER service connections to be SSL

Can you configure the ADMIN and CLUSTER service connections to be SSL
rather than tcp?
I was wondering about the present or future ability to secure other
connection services with SSL. Can you now or are there future plans
to configure the ADMIN and CLUSTER service connections to be SSL
rather than tcp? I suppose I should add the PORTMAPPER to that list.
My primary interest is for an SSLCLUSTER service in the case where
two brokers are connected over a non-trusted network. It may
not be too difficult to secure all the services the same way, but
perhaps that is on the TODO list.
A related question is if there are plans to add SSL with client
authentication as a stronger authentication mechanism than 'simple'
username and password. I believe you could get the username from
the client certificate's DN and continue to use the same LDAP user
repository for access control. I think this is similar to the way
that BEA's Weblogic server does it.
Finally should it be possible to deploy the HTTP tunnel servlet to
a webserver (such as iPlanet Web Server) configured to do SSL with
client authentication as a work-around to get stronger authentication
with the current release of the product? Or am I perhaps missing some
obvious and important detail? :) I guess I would like to know it's been
done already or is at least possible before I try and do it myself.

3 scenarios involving SSL are:
1: JMS client <------- SSL -------> iMQ broker
2: iMQ admin <------- SSL -------> iMQ broker
3: iMQ broker <------- SSL -------> iMQ broker (i.e clusters)
(1) is currently supported in iMQ 2.0
(2) and (3) is not supported in iMQ 2.0. No concrete plans yet to support
it in the near future but we'll definitely consider doing it if we
hear a lot of demand for it.
]A related question is if there are plans to add SSL with client
]authentication as a stronger authentication mechanism than 'simple'
]username and password. I believe you could get the username from
]the client certificate's DN and continue to use the same LDAP user
]repository for access control. I think this is similar to the way
]that BEA's Weblogic server does it.
This is on our todo list, but due to other more pressing issues we
have not been able to address it. We will continue to keep it
on our potential list of new features.
Sorry if I sound pretty wishy-washy in my responses above, but the fact
is that the things you mentioned above had to take a backseat
to other more critical features. That and the usual time/resource
constraints caused them not to be implemented.
]Finally should it be possible to deploy the HTTP tunnel servlet to
]a webserver (such as iPlanet Web Server) configured to do SSL with
]client authentication as a work-around to get stronger authentication
]with the current release of the product? Or am I perhaps missing some
]obvious and important detail? :) I guess I would like to know it's been
]done already or is at least possible before I try and do it myself.
Yes, this should be possible (although I don't believe we've tried it here).
The client authentication here is really only between the JMS client and the
web server (not between the tunnel servlet and the iMQ broker) and should
be similar in setup to any other java application talking to iPlanet Web
Server.

Capacity Planning for Hyper-V individual host and Cluster

Hi Experts
I need to know some basic idea about Capacity planning for Hyper-V which requires Capacity Planning for Hyper-V individual host and Cluster.
I got attached info on websites but still not clear. Can someone link me to an effective website or help me to calculate the required sizing. W
Regards Suman B. Singh

Hi,
You might want to check out these websites:
http://www.microsoft.com/en-us/download/details.aspx?id=39057
http://technet.microsoft.com/en-us/library/dd277865(v=office.12).aspx
http://technet.microsoft.com/en-us/solutionaccelerators/dd537570.aspx
Cheers
Andrew

Which type of information can be hold by pool and cluster tables

hi experts tell me exactly which type of information hold by pooled and cluster tables
thanks in advance

Hi
I hope, you know that Rewarding with Points for the Useful answers is the SDN policy
Pooled table
Pooled tables can be used to store control data (e.g. screen sequences,
program parameters or temporary data). Several pooled tables can be
combined to form a table pool. The table pool corresponds to a physical
table on the database in which all the records of the allocated pooled
tables are stored.
Cluster table
Cluster tables contain continuous text, for example documentation.
Several cluster tables can be combined to form a table cluster. Several
logical lines of different tables are combined to form a physical record
in this table category. This permits object-by-object storage or
object-by-object access. In order to combine tables in clusters, at
least part of the keys must agree. Several cluster tables are stored in
one corresponding table on the database.
Pool Tables (match codes, look up tables)
Should be accessed via primary key or
Should be buffered (SE11->Display Table->technical settings)
No secondary indexes
Select * is Ok because all columns retrieved anyway
Cluster Tables (BSEG,BSEC)
Should be accessed via primary key - very fast retrieval otherwise very slow
No secondary indexes
Select * is Ok because all columns retrieved anyway. Performing an operation on multiple rows is more efficient than single row operations. Therefore you still want to select into an internal table. If many rows are being selected into the internal table, you might still like to retrieve specific columns to cut down on the memory required.
Statistical SQL functions (SUM, AVG, MIN, MAX, etc) not supported
Can not be buffered
Reward points for useful Answers
Regards
Anji

Classify and cluster documents with algorithm in java

Hello everybody,
I want to classify and cluster, let's say, 100 documents which are on the Intranet.
I was thinking of including an algorithm in java who can do this.
But i have no clue where to start of where to begin.
Please give me some advice or maybe an example ;),
Greetings,
Thijs Leusink
[email protected]

I was thinking of including an algorithm in java who
can do this.
But i have no clue where to start of where to begin.Two steps:
1. Find an algorithm that can do what you want.
2. Write it in Java.
Start with the first step: if you haven't done that yet, I don't think we can help you here. Possibly you could use Google to find an algorithm.
Then go on to the next step: if you don't even know how to begin writing a Java program then there is a collection of introductory tutorials here:
http://java.sun.com/docs/books/tutorial/
If you are having problems after that, come back here and ask a specific question.

Weblogic plugin and cluster concepts

Hi,
I would like to clearly understand how the plugin and cluster work together in achieving load balancing.
For example if Apache proxies the request to each server instance in a cluster(if we use weblogic cluster parameter) on the round robin basis. How does the cluster do the the load balancing and how does it respond to webserver. I have read some documentation in edocs but couldnt find anything that would clearly explain how this works. All it talks about is the configuration of plugin and load balancing techniques in the cluster.Please throw some light on this and help me figure out how this thing works.
Thankyou very much.

Hi Hoze,
In Oracle Enterprise Manager lingo, a plug-in simply enables EM to monitor heterogeneous environments. In some cases this capability is available OOB or after the fact.
The table here
http://www.oracle.com/technology/products/oem/extensions/index.html
makes it clear if a plug-in is available OOB or available for download.
Thanks

Can anyone give ex's for poolled and cluster and transparent tables

Hi ,
Can u help me by providing ex's for poolled and cluster and transparent tables

Hi,
Following are the examples for each type.
Transparent table - VBAK.
Cluster Table -BSEG
Pooled Table - KAPOL
Regards,
Ankur Parab

JMS system module between Admin and Cluster

Hi,
In my application, I have JMS servers,queues and Uniform distributed Queue to be assigned to Cluster and some other queues to be assigned to Admin server.
Can I have assign resources for both Cluster and Admin servers in single JMS system module and assign its target to both Cluster and Admin? or Should I create seperate JMS system module for admin and Cluster? Which is best and efficient way? PLease clarify.
Thanks in advance.

Hi,
Can I have assign resources for both Cluster and Admin servers in single JMS system module and assign its target to both Cluster and Admin?Yes
Should I create seperate JMS system module for admin and Cluster? Which is best and efficient way?This depends on how much you are going to stress the queue, and your box. This is, you should try to have a queue persistent store that somehow matches what the box can handle. Also keep in mind that local queues tent to be more efficient than remote queues, at the cost of adding cycles to the box where you have your app installed.
Regards,
LG

Replicating Pool and Cluster tables in HANA

Hi,
Has anyone been able to successfully replicate the Pool and Cluster tables to HANA? I browsed around but am not able to find any solid material/documents related to the same. Please point me to the same.
yogesh

Hi Yogesh,
Maybe you skiped this one. The sample uses BSEG from cluster RFBLG and it's very well explained by Tobias Koebler
How to enable parallel replication
Regards, Fernando Da Rós

LoadBlanceing and Cluster

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