Class-maps used for load balancing on ACE
I am from CCS background and am trying to understand how the VIPs could be configured on an ACE module (using class maps).
I am looking for specific information for the following :
1. Will each VIP have a corresponding Service-policy on the VLAN Interface or can we club many VIPs (through policy-maps) onto a single service-policy entry on teh interface?
2. I could not find any cisco doco with the configuration examples for more than one VIP address and would please like to know some examples, if possible or could some one direct me to a doco with many VIP entries ?
- Should each VIP have a seperate class-map or can list them together?
You will have to configure L3/L4 class-maps for corresponding VIPs. You just need a single policy with n class-maps for n VIPS.
I am writing a sample that will hopefully help you on this
class-map match-all app1-vip
match virtual-address 10.1.1.1 tcp eq 80
class-map match-any app2-vip
match virtual-address 10.1.1.2 tcp eq 443
policy-map type loadbalance first-match L7app1
class class-default
server-farm App1-farm
policy-map type loadbalance first-match L7app2
class class-default
server-farm App2-farm
policy-map multi-match All-vips
class app1-vip
loadbalance vip inservice
loadbalance policy L7app1
loadbalance vip icmp-reply active
class app2-vip
loadbalance vip inservice
loadbalance policy L7app2
loadbalance vip icmp-reply active
int vlan 100
ip address 10.10.10.101 255.255.255.0
service-policy input All-vips
Syed Iftekhar Ahmed
Similar Messages
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Debug commands for load-balancing on ACE
is possible to debug the load-balancing decision which is provided by ACE? For example: when the traffic comes to the VIP address I need to see which serverfarm is used for this traffic and which rserver was choosen for this traffic. Thank you.
no, you there is no debug to see the decision.
You could capture the queues infos and see what it contains but it is quite complicated.
A simple way is to capture a sniffer trace of front-end and backend simultaneously and you will be able to see where the traffic was loadbalanced.
You can also use the capture feature of the ACE module to get this info.
Gilles. -
Distributed naming services for load balancing
Can distributed naming services can be used for load balancing?
ata,
Before jumping to anything so bloated and limited as cougaar, take time to consider what you really need. Before grabing at the fanciest Java features like RMI, JINI, and custom SocketFactories; focus on what you are trying to accomplish.
There are plenty of great answers right here, at this forum.
Good hunting,
John -
Load Balancing with ACE using HTTP Header information
Hello,
I am trying to setup a class-map using http loadbalance match-all.
What I want to do is check for the HTTP Host and if it doesnot match the http referer than go to server farm A. if it does match then go to server farm B.
My problem is the host can be serveral different values as well as the referer. Can you setup varibales in the ACE so I can store the value from http host and compare it against http referer?
Thanks
Mike C.It should be like this (If you want to use separate class maps for referrer & Host).
class-map type http loadbalance match-any site1-HostHDR
2 match http header Host header-value ".*site1.com"
class-map type http loadbalance match-any site1-Referer
2 match http header Referer header-value "http://site1.*"
class-map type http loadbalance match-any site2-HostHDR
2 match http header Host header-value ".*site2.com"
class-map type http loadbalance match-any site2-Referer
2 match http header Referer header-value "http://site2.*"
class-map type http loadbalance match-all Site1-policy
2 match class-map site1-HostHDR
3 match class-map site1-Referer
class-map type http loadbalance match-all Site2-policy
2 match class-map site2-HostHDR
3 match class-map site2-Referer
policy-map type loadbalance http first-match Site1
class Site1-policy
serverfarm SFarm-A
class Site2-policy
serverfarm SFarm-A
class class-default
serverfarm SFARm-B
Syed Iftekhar Ahmed -
SSP5: Using multiple JVM for load balance performance?
Sun 12 MAY 2002
Apps 11.0.3
SSP5 patchset I
HP UX 11.0
db 8.1.7.2 (64-bit)
Load 60 concurrent sessions, each spawning 2.5 - 3 http connections.
CPU 3:750Mhz
RAM 8G
Is anybody using multiple JVM for load balance?
What is your ratio of JVM to concurrent iP sessions?
Are you running Apache/Jserv on a server with any other applications, or is Apache by itself?
If you are not using JVM, how many httpd processes do you get before Apache implodes? We stopped in the water at 90 httpd processes, but performance degraded starting at 70 sessions.
Thx - DonUsing Web Cache to load balance servlet-based Forms (6i and 9i) is unofficially supported. I say "unofficially" because we have actual customers doing it and getting support, but the 2 development teams (Forms and Web Cache) haven't actually done any integration testing of this sort of configuration yet. For your case, please contact your Support rep and ask what was done to use Web Cache as a load balancer for Forms6i at METRO in Germany. The Forms product managemment team is writing up a white paper to describe how to do it, but until then, you'll need to go through Support. Please contact me if you want more information.
-
Setting up additional load balancing on ACE 4710
I recently deployed ACE 4710 to load balance traffic to a group of web servers. I would like to add additional server farm(s) with different applications on them to ACE 4710 for load balancing the traffic. How can I best achieve this goal? I currently use 3 interfaces out of 4 interfaces (Server Side interface, Client side interface, and Failover interface). Do I need to use my last interface to set up for the new VIP address for a new server farm? Is virtualized service a possible solution? Thank you in advance.
You can configure trunking so that multiple vlans can exist.
Also note that the vip ip address does not have to belong to a subnet.
You could configure a static route on the upstream router pointing the traffic for the new vip to the interface ip address.
Gilles. -
Guys,
Looking for some feedback on DMSMetricCollector when using "metric" as the selectmethod for load-balancing. What i want to know is that whether the DMSMetricCollector can be configured to use multiple metrics such jvm-heapsiize, servlet-processRequestTime etc, Connection-pools FreePoolSize.value etc ? the documentation doesn't explicitly mention that if its possible, apparently it doesn't but want to check from the experts here, Steve you might have something on this...
Or if there is any other implementation available which supports load-balancing based on multiple performance metrics
Thanks and Regardscan i use this loadbalancer.jar or not?
how to mod_oc4j in standalone app server -
Round robin DNS for load balancing between multiple network adapters (Xserve)
I'm attempting to use 'round robin' DNS to load balance between the two ethernet adapters of an Xserve.
Both ethernet adapters are connected to the same LAN and have static IP addresses of 192.168.2.250 and 192.168.2.251.
The DNS zone for the server's local domain/host (macserver.private) has a machine record with both IP addresses (set up in the Lion Server UI).
Having read up on round robin DNS, I would have expected DNS requests for 'macserver.private' to be answered with the two IP addresses ordered at random, achiving my aim of requests being served at random via each ethernet adapter.
However this doesn't seem to be the case. Doing a 'nslookup' from any of the network clients results in the two IP addresses being listed in the same order everytime. And pinging 'macserver.private' only ever results in a response from the same address.
Does anyone know why this is the case? Does Lion Server use a non-standard DNS configuration? Are there any additional settings I need to configure in Lion's DNS server to make adopt a round robin approach to responding to requests?
Thanks in advance for any help!Be careful what you wish for
Round Robin DNS is rarely the best option for 'load balancing'. At the very least it's subject to caching at various point on the network - even at the client side, once the client looks up the address it will cache that response - this means that subsequent lookups may be served from the client's cache and not refer back to the server. Therfore any given client will always see the same address until the cache expires.
I suspect this is what you're seeing.
You can minimize this by setting a lower TTL on the records. This should result in the response being cached for a shorter period, meaning the client will make more requests to the server, with a higher change of using the 'other' address.
However, you're also going to run into issues with the server having two interfaces/addresses in the same LAN. This isn't recommended.
As Jonathon mentioned, you may be better off just bonding the two interfaces. This will provide an automatic level of dynamic load balancing without the latency of DNS caches, as well as automatic failover should one link fail (as opposed to round robin DNS which will cause 50% of requests to fail until the client cache expires and a new lookup is performed (and, even then, there's still a chance the client will try to use the failed link). -
New CAS for Load Balancing Exchange 2007
I want to add a new CAS to an existing Exchange 2007 environment (there is already one CAS and it functions properly) to allow for load balancing. After adding the new server I wanted to do some testing (before I actually set it up for load balancing).
If I try to log in to a mailbox using OWA I get an error stating that "Exception type: Microsoft.Exchange.Data.Storage.ConnectionFailedTransient ExceptionException message: Cannot open mailbox". I am sure I am missing something simple, but cannot
figure it out. Could someone point me in the right direction?Is your new CAS in the same Windows site as the rest of your Exchange servers? In Exchange 2007 and 2010, the CAS needs to be in the same Windows site as the mailbox it is servicing (unless you are accessing from the Internet and the other site has
no externally accessible CAS). -
Windows Event Collector - Built-in options for load balancing and high availability ?
Hello,
I have a working collector. config is source initiated, and pushed by GPO.
I would like to deploy a second collector for high availability and load balancing. What are the available options ? I have not found any guidance on TechNet articles.
As a low cost option, is it fine to simply start using DNS round-robin with a common alias for both servers pushed as a collector name through GPO ?
In my GPO Policy, if I individually declare both servers, events are forwarded twice, once for each server. Indeed it does cover high availability, but not really optimized.
Thanks for your help.Hi,
>>As a low cost option, is it fine to simply start using DNS round-robin with a common alias for both servers pushed as a collector name through GPO ?
Based on the description, we can utilize DNS round robin to distribute workloads and increase fault tolerance. By default, DNS uses round robin to rotate the order of RR data returned in query answers where multiple RRs of the same type exist for a queried
DNS domain name. This feature provides a simple method for load balancing client use of Web servers and other frequently queried multihomed computers. Besides, by default, DNS will perform round-robin rotation for all RR types.
Regarding DNS round robin, the following article can be referred to for more information.
Configuring round robin
http://technet.microsoft.com/en-us/library/cc787484(v=ws.10).aspx
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Best regards,
Frank Shen -
CF8/JRun4 Cluster for Load Balancing
Does anyone have an example of how to set up a CF8/JRun4
cluster for load balancing?
I have three servers:
x004 - Linux - Apache2 (10.0.0.54,10.1.0.54)
x020 - Linux - JRun4/CF8 (10.0.0.70,10.1.0.70)
x021 - Linux - JRun4/CF8 (10.0.0.71,10.1.0.71)
Every server in our network has two network cards. One
network card is attached to 10.0.x.x which has a gateway to the
internet and runs at 100Mbps and is firewalled, and the other is
attached to 10.1.x.x which runs at 1Gbps and is internal with no
gateway. I'm trying to set it up so web traffic arrives on
10.0.0.54 into Apache and mod_jrun20 bootstraps a cluster named
STST using 10.1.0.54 which consists of STST_x020 coldfusion server
running on x020 and STST_x021 running on x021. I want the
communications between JRun4 on x020 and x021 to occur on the
10.1.x.x network and eventhough JRun and ColdFusion will only use
the 10.1.x.x network I still need the 10.0.x.x network card
attached for other purposes which require a gateway. I have
installed JRun4/CF8 about 10 times already and it seems I have no
control over what network JRun4 clusters on... sometimes it will
communicate on one, sometimes the other and without being able to
set which network is being used there always seems to be "network
error" on at least one of the two CF8 servers. I was able to get
everything working fine by disabling the network cards on the
10.0.x.x network and re-installing everything... but as soon as I
added the network cards back the whole thing was broken again.
How is this supposed to work? Most of the examples are either
no clustering or clustering on the same machine with Apache running
on the same box... I don't see any clustering across machines
examples.
How do I install a connector on a web server which doesn't
have JRun on it and get wsconfig to connect to a multi-machine
cluster when wsconfig only accepts a single IP address as a host
and the cluster is not listed?
How do I get JRun to bind to a specific network card?
Does this work if I choose a J2EE server other than JRun?
Any help anyone can provide is greatly appreciated. I'm
getting close to giving up which means staying on the non-clustered
environment and figuring out how we can deal with scalability by
switching to something else.The article at
http://www.adobe.com/go/1e8e9170
is specific to configuring two or more cluster nodes that reside on
separate networks, e.g. 10.0.1.0/24 and 10.0.2.0/24. (The article
doesn't state it, but you can only use unicast peers if your
cluster nodes host a single instance of JRun or multiple instances
of JRun in the same cluster domain. When performing unicast
discovery, JRun looks for all Jini groups and not just the cluster
group.)
Anyhow, that's not your problem. The simplest solution is you
haven't enabled the jrun.servlet.jrpp.JRunProxyService service. I'm
most familiar with the Windows version of JRun, but I'm assuming
the directory structure is similar across platforms. In
<jrun_root>/servers/<name>/SERVER-INF/jrun.xml, set the
deactivated attribute of the jrun.servlet.jrpp.JRunProxyService
service to false and restart JRun. You should now see JRun
listening on the appropriate port. (The default for the first
manually created instance is 51000.) You can limit the proxy
service to a single interface using the interface attribute.
If you have enabled the proxy service, verify your security
settings in <jrun_root>/lib/security.properties. It's usually
best to limit access to specific hosts. Comment out the
jrun.subnet.restriction parameter and set the jrun.trusted.hosts to
the IP address of your web server, e.g. 10.1.0.54.
Forcing all JRun processes/services to listen on a single
interface isn't difficult, but it does require modifying quite a
few configuration files by hand. If you need assistance with that,
I can elaborate.
Configuring the JRun module under Apache is pretty
straightforward. If you're not using virtual hosts, it's very
simple. If you are using virtual hosts, it's still simple, but your
JRun configuration can be virtual host-specific.
On your Apache server, you'll want to create a directory
structure for the JRun module. I'll assume
/opt/jrun/lib/wsconfig/1, but you can use anything you want. Once
the directory structure is created, extract the appropriate JRun
module from wsconfig.jar to the new directory. You're most likely
interested in the Apache 2.0 module,
wsconfig.jar/connectors/apache/intel-linux/prebuilt/mod_jrun20.so.
Let's assume you've extracted the module to
/opt/jrun/lib/wsconfig/1/mod_jrun20.so. Your Apache service account
should have read, write, and execute permissions on the
/opt/jrun/lib/wsconfig/1 directory.
The JRun module configuration is normally appended to your
current httpd.conf file by wsconfig. Here's a sample configuration:
LoadModule jrun_module
"/opt/jrun/lib/wsconfig/1/mod_jrun20.so"
<IfModule mod_jrun20.c>
JRunConfig Verbose false
JRunConfig Apialloc false
JRunConfig Ssl false
JRunConfig Ignoresuffixmap false
JRunConfig Serverstore
"/opt/jrun/lib/wsconfig/1/jrunserver.store"
JRunConfig Bootstrap 10.1.0.70:51000
#JRunConfig Errorurl <optionally redirect to this URL on
errors>
#JRunConfig ProxyRetryInterval 600
#JRunConfig ConnectTimeout 30
#JRunConfig RecvTimeout 30
#JRunConfig SendTimeout 30
AddHandler jrun-handler .jsp .jws .cfm .cfml .cfc .cfr
.cfswf
</IfModule>
You may also want to update your DirectoryIndex directive
with an appropriate index page, e.g. index.cfm.
After the first request to a page handled by the JRun module
is received, the module will query the boostrap server,
10.1.0.70:51000, for a list of cluster peers. If you've configured
your cluster correctly, a line similar to following will be written
to /opt/jrun/lib/wsconfig/1/jrunserver.store:
proxyservers=10.1.0.70:51000;10.1.0.71:51000
You can create/edit this file manually as well.
Unfortunately, the bootstrap option only accepts one server. If
your bootstrap server is down, the JRun module will use the values
in jrunserver.store directly, if the file exists.
Here's a complete list of JRun module options:
metrics *
debugger *
ssl *
verbose
traceflags
serverstore
bootstrap
errorurl
apialloc
ignoresuffixmap
proxyretryinterval
connecttimeout
recvtimeout
sendtimeout
sslcalist
Options flagged with an asterisk can only be configured at
the Apache server level. All other options can be configured at the
server level and/or the virtual host level. The usage of these
options is in the JRun documentation, and the JRun module source
code is included in wsconfig.jar. Keep in mind that versions of the
JRun module shipped prior to ColdFusion 8 were coded to assign the
connecttimeout and sendtimeout options to the socket connection
timeout. Whichever option appeared last in your configuration ended
up as the final value. This has been fixed in ColdFusion 8 and
presumably the next release of the JRun updater.
I think that's a good start. If you need more information or
can't find what you need in the JRun or ColdFusion documentation,
let me know.
If you're looking for resiliency, I highly recommend
expanding your configuration to include a second web server and a
hardware load-balancer (preferably one that supports redudancy via
multiple paths and devices, e.g. devices from Cisco, F5, or Foundry
Networks). Often, however, running Apache on the ColdFusion
server(s) provides adequate performance, and round-robin DNS
records coupled with the ability to update DNS quickly in the event
of a failure may be all you need for load-balancing and
failover. -
Webdispatcher for Load balancing
Hi All,
We have implemented EP7. The portal is configured to redirect to https.
Now we want to use sapwebdispatcher for load balancing.
We are performing the following steps to configure the sapwebdispatcher
1. uncar the icmadmin.SAR
2. sapwebdisp -bootstrap
The following screen appears:
This bootstrap will perform the following steps:
1. create profile file "sapwebdisp.pfl"for SAP Web Dispatcher (if not already existing)
2. create user for web based administration in file "icmauth.txt"(if not already exisiting)
3. start SAP Web Dispatcher with the created profile
After the bootstrap you can use the web based administration
Generating Profile "sapwebdisp.pfl"
Hostname of Message Server (rdisp/mshost): <hostname>
HTTP Port of Message Server (ms/http_port): 8101
Checking connection to message server...OK
Unique Instance Number for SAP Web Dispatcher (SAPSYSTEM): 38
HTTP port number for SAP Web Dispatcher: 8101
Create configuration for s(mall), m(edium), l(arge) system (default: medium): l
WARNING: Maximum number of sockets supported on this system: 2045
Please check the operating system configuration
Profile "sapwebdisp.pfl" generated
Authentication file "icmauth.txt" generated
Web Administration user is "icmadm" with password "xxxxxxxxx"
Restart sapwebdisp with profile: sapwebdisp.pfl
sapwebdisp started with new pid 14014
Web administration accessible with "http://<hostname>:8101/sap/wdisp/admin/default.html"
SAP Web Dispatcher bootstrap ended (rc=0)
<hostname>47> *** WARNING: Could not start service 8101 for protocol HTTP on host "<hostname>m"(on all adapters)
SAP Web Dispatcher up and operational (pid: 14014) ***
Now, if I use any port other than 8101 for HTTP port number for SAP Web Dispatcher the webdispatcher does not work.
If i use port 8101(which i am using currently) then the webdispatcher does the load balancing however i cannot access the http://<hostname>:8101/sap/wdisp/admin/default.html url
Can anyone help me getting both thigs: load balancing and the webdisp admin page also.
Thanks!!
Regards,
RohitHi Rohit,
this is your Profile File
Generating Profile "sapwebdisp.pfl"
Hostname of Message Server (rdisp/mshost): <hostname>
HTTP Port of Message Server (ms/http_port): 8101
Checking connection to message server...OK
Unique Instance Number for SAP Web Dispatcher (SAPSYSTEM): 38
HTTP port number for SAP Web Dispatcher: 8101
Create configuration for s(mall), m(edium), l(arge) system (default: medium): l
WARNING: Maximum number of sockets supported on this system: 2045
Please check the operating system configuration
Profile "sapwebdisp.pfl" generated
Authentication file "icmauth.txt" generated
Web Administration user is "icmadm" with password "xxxxxxxxx"
Restart sapwebdisp with profile: sapwebdisp.pfl
sapwebdisp started with new pid 14014
Web administration accessible with "http://<hostname>:8101/sap/wdisp/admin/default.html"
You have wrongly configured your HTTP port number for SAP Web Dispatcher make it as 80 by default
Sample Profile File:
Profile generated by sapwebdisp bootstrap
unique instance number
SAPSYSTEM = 1
add default directory settings
DIR_EXECUTABLE = .
DIR_INSTANCE = .
Accessibility of Message Servers
rdisp/mshost = Hostname
ms/http_port = 8101
SAP Web Dispatcher Parameter
wdisp/auto_refresh = 120
wdisp/max_servers = 100
wdisp/shm_attach_mode = 6
configuration for small scenario
icm/max_conn = 100
icm/max_sockets = 1024
icm/req_queue_len = 300
icm/min_threads = 5
icm/max_threads = 15
mpi/total_size_MB = 20
#maximum number of concurrent connections to one server
wdisp/HTTP/max_pooled_con = 100
wdisp/HTTPS/max_pooled_con = 100
SAP Web Dispatcher Ports
icm/server_port_0 = PROT=HTTP,PORT=80
icm/server_port_1 = PROT=ROUTER,PORT=443
Swapnil -
FRM-92102 when accessing a form using a Load Balancer
Greetings.
We have two oracle application servers version 10.1.2.0.2 on windows 2003 running forms and reports. When just one a server is running everithing works fine, but when I start the second server the clients receive the message "FRM-92102 : A network error has occurred.The Forms Client has attempted to re-establish its connection to the Server 5 times without success.Please check the network connection and try again later" when the first form is called. In our coniguration the F5 Load Balancer is redirecting requests to the Apache ports in both Oas Machines, we are not using the webcache port. I read the note "FRM-92102 When Using A Software Load Balancer With Forms [ID 465583.1]" but this note applies when webcache is used. Our LBR is set using "insert cookie" persitent mechanism.
I have the following questions:
What configuration is needed in OAS files in order to use a LBR and avoid the FRM-92102 error?
How can I debug or trace FRM-92102 issues?
Thanks!
Ramiro Ortiz.FRM-92102 is the result of the client not getting a response from the server (mid tier). This generally means only one of a couple of things:
1. The mid tier which parented the Forms session is not responding. This could be because it is overloaded, the web server (OHS or WebCache) is failing, or something else is preventing the client from getting a response.
2. Client requests are being routed to the wrong mid-tier server. This is usually the result of improper load balancer configuration or an LB failure. However, generally in this case FRM-92101 would result. If you are using an unpatch 10.1.2 installation, as I believe you are (10.1.2.0) then seeing either error may be possible.
Regarding the note that discusses using Oracle WebCache for load balancing, regardless of whether you are using an Oracle product or hardware or whatever for loadbalancing, the same concept will apply. The load balancer must have session binding enabled. Understanding whether or not this is the problem should be fairly easy to determine. Simply shutdown one server. If everything works correctly, restart the second server. If the problem now occurs, you can likely assume you have a session binding issue and should likely refer to the load balancer's documentation or their Support group.
Also, important to understand is that if the load balancer is designed to alter the header information in any way, the likelihood of failing Forms sessions is high. Forms is expecting very specific information in the header exchange. Some intermediate servers (load balancers, ssl accelerators, firewalls, etc) have been known to intentionally or unintentionally alter the header. Again, contact the vendor.
If you are seeing that the client console is reporting 5 retry attempts, yet you have not set "networkRetries" in formsweb.cfg, this often suggests a critical tcp/ip failure. Often, but maybe not always, the result of a damaged header or other misconfiguration or failure outside of Forms. -
Clustering for load balancing only
I wish to set up 2 WLS 8.1 machines to run an application independently to
share load (no replication of sessions, beans etc).
Can I create a cluster for the two servers and not turn on any session or
bean replication, then configure the IIS or Apache plug-in to use the
cluster and therefore create some load balancing?
Chris
Chris,
Yes you can certainly use a Cluster simply for load balancing. There is no
mandate that you have to take advantage of session state replication in the
cluster.
~Ryan Upton
"Chris Steains" <[email protected]> wrote in message
news:[email protected]..
> I wish to set up 2 WLS 8.1 machines to run an application independently to
> share load (no replication of sessions, beans etc).
>
> Can I create a cluster for the two servers and not turn on any session or
> bean replication, then configure the IIS or Apache plug-in to use the
> cluster and therefore create some load balancing?
>
>
> Chris
>
>
-
Hi
Not sure if this is the right place for putting this question.
Has anyone used radware with weblogic sucessfully?
We are running 2 weblogic servers ( temporarily) and plan to use
Radware to do the load balancing. Radware simply forwards the request to one of
the servers using the load balancing algorithm.
However since the request sent to the servers contains the same url, we created
a virtual host in each of the servers ( same as the host name in the URL sent).
But there seems to be some problem with this as as we are not getting consistent
results.
Anything wrong with this? Are there any known problems with virtual host in WLS
6.0 sp2?
Thanks in Advance
Hi,
I don't really get your question.
Radware load balance depending on the algorithm you configured. If you want to make a client have a persistence conectivity to the same server, you can use session persistency in Radware :)
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