Using StoneBeat WebCluster load balancing with WebLogic

          Hi,
          I have done some testing of WebLogic Server with my company's StoneBeat WebCluster
          distributed load balancing software. This might be one more option to consider
          as a load balancing solution for WLS. It is advanced in the sense that load balancing
          is really dynamic, there are no single-points of failure (distributed architecture)
          and there is a very good, configurable test subsystem that runs on each cluster
          node to check for overload situations, HW/OS failures, ...
          In the initial testing, the WebCluster load balancing works with WebLogic replication,
          although there are some cases that need mroe consideration (please see below).
          I had to get a patch to WLS6SP1 on NT to make WLS' multicast work when there are
          several NICs on the cluster nodes.
          However, there is one case which causes problems:
          - I have 3 cluster nodes
          - P: 2, S: 3 (SessionServlet = 1)
          - 2: offline - P: 3, S: 1 (SessionServlet = 2; WebCluster randomly selected a
          new node to handle the connection)
          - 2: online - P: 2, S: ? (SessionServlet = 3, WebCluster redistributes the load
          when a node goes online)
          - 2: offline
          - P: 3, S: 1 (__SessionServlet = 1__) NB!
          The log messages show that when node 2 comes back online it retrieves the replica
          from the secondary (node 1) and not from the primary (node 3). After a while (5-6
          minutes), node 3 tries to update the replica on node 1. Node 1 considers this
          a stale update request and removes the Primary 16... (node name) and then the
          secondary for 16... (the replicated object). Then there's a message (still on
          node 1) that it is unable to find object 16... Back on node 3 the primary for
          16... is removed.
          From the WLS6 documentation (under the discussion of using replication with external
          HW load balancing solutions) I thought that this case would have been handled:
          - it is stated that after the failure of a node, if the HWLB box sends the next
          request to a node where there is no replica, WLS is able to retrieve the replica
          - to be fair, this is what happens: when node 2 came back online, it retrieved
          the replica from node 1 (the secondary) - I suppose that there is an assumption
          that if a request arrives to a node without a replica, the primary __must have
          failed__
          Is there any way to get around this problem?
          Admittedly, WebCluster has a problem in that the stickyness of connections is
          not perfect: - when a node goes online, a connection that was correctly persisted
          (based on either source-ip or source-network address) may be moved to a new node
          since the load is redistributed. Our load balancing is very dynamic, but doesn't
          maintain a list of who is connected to which node when resistribution takes place
          Regards,
          Frank Olsen
          Stonesoft

Rick,
You may want to look at the Alteon and F5 configuration we have on edocs.
Take a look at the following URLs for a possible solution
http://edocs.bea.com/wls/docs61/cluster/alteon.html#591902
http://edocs.bea.com/wls/docs61/cluster/bigip.html#591902
Chuck Nelson
DRE
BEA Technical Support

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We are using rwo weblogic 6.1 servers A and B behind a load balancer with a DNS name (eg. www.loadbalancer.com). We are using T3 for Java client to application server communication. The client creates the Initial context with the load balancer url,creates remote objects using the context, closes the initial context and then tries to get a new initial Context. What we noticed is even though the client closes the first context and gets a new one, the client is always hooked on to only one server making load balancing ineffective. Is there a T3 configuration to release the connection when we close the context ? The documentation says only one T3 is established per client JVM.

Rick,
You may want to look at the Alteon and F5 configuration we have on edocs.
Take a look at the following URLs for a possible solution
http://edocs.bea.com/wls/docs61/cluster/alteon.html#591902
http://edocs.bea.com/wls/docs61/cluster/bigip.html#591902
Chuck Nelson
DRE
BEA Technical Support

HTTP Tunneling and Load Balancing with Weblogic Server 6.1

We use T3 for Java client to application server communication (Weblogic Server
6.1) and keep the session open for the life of the client. We many customers
using this with load balancers and all works fine. We have just started to use
BEA's HTTP tunneling and I have a question concerning how this will work with
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Rick

Rick,
You may want to look at the Alteon and F5 configuration we have on edocs.
Take a look at the following URLs for a possible solution
http://edocs.bea.com/wls/docs61/cluster/alteon.html#591902
http://edocs.bea.com/wls/docs61/cluster/bigip.html#591902
Chuck Nelson
DRE
BEA Technical Support

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Anyone and everyone,
When configuring load balancing with Weblogic clusters, does load
balancing take effect for all services or just EJB and RMI? Or another
way of saying the same thing, can I setup weighted load balancing for
the JSP engines across 2 weblogic servers.
Thanks in advance,
Mike

The load-balancing documentation you read describing the different algorithms only applies to RMI stubs (e.g., EJB clients). Please see http://www.weblogic.com/docs51/cluster/concepts.html#1026091 for a description of how load-balancing/clustering works with servlets/JSPs.
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Brian Lin wrote:
All,
I have a quesiton here regarding load balancing with DNS round robin. As of Chapter Adminstration of Clustering Weblogic server, Weblogic can be configured to balance by weight. How about Weblogic handle weight based balancing after DNS round robin ip response? or just can choose one way instead of both?
What's the big difference between choosing BigIP and software balancing (WL)?
Brian
"Wei Guan" <[email protected]> wrote:
I don't think you can configure this load balancing in weblogic in current
release. However, if you have Big-IP or LocalDireoctr, you can set up
weighted load-balancing there. Otherwise, weblogic proxy will use DNS round
robin to do the load-balancing between JSP engins.
My 2 cents.
Cheers - Wei
Michael Yakimisky <[email protected]> wrote in message
news:[email protected]...
Anyone and everyone,
When configuring load balancing with Weblogic clusters, does load
balancing take effect for all services or just EJB and RMI? Or another
way of saying the same thing, can I setup weighted load balancing for
the JSP engines across 2 weblogic servers.
Thanks in advance,
Mike

Load balancing with use of router 881.

Hello,
I have two MPLS line and i want load balancing with the help of CISCO router 881. is it necessary that i require two router on both location.? if one location have firewall and one location have cisco router 881 then can i do a load balancing or i require two router each on both location ? What are the basic requirement that i need.
Thanks,
Kuntal

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Posting
An 881 should be able to load share across multiple ports. Many routing protocol support ECMP, including BGP, but you need "special" hidden/secret commands to enable. EIGRP also supports unequal cost load sharing.
If an 881 supports OER or PfR, those too will do unequal load sharing, dynamically.

Load Balancing with ALBPM 6.0

Hi -
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Hi PR,
Please take a look at the following link:-
http://help.sap.com/SAPHELP_NWPI71/helpdata/EN/28/75153a1a5b4c2de10000000a114084/frameset.htm
"You can only use the SAP message server for HTTP load distribution if
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The servers are Windows Server 2008 R2 with IIS7.5 and ColdFusion 10 Enterprise on installed on 3 of these machines. Let's call them CF-LBManager, CF-Web1, and CF-Web 2. In the CF Docs, they show the Cluster Manager adding the local CF instance and "if you want" a remote instance. However, this scenario would require the main instance to be running and not fail for it to direct to the other instance.
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Unfortunatley I don't have a lot of experience with CF10 on Windows, but if you are running CF behind IIS I think you will need to update the Tomcat connector configuraiton to do load balancing. I'm not sure if re-running the wsconfig tool on all of the servers will do this or not, but that is what I would suggest trying first. If that doesn't work you will need to update the Tomcat connector configuraiton manually. You can find more information on load balancing with the Tomcat connector here: http://tomcat.apache.org/connectors-doc/generic_howto/loadbalancers.html.

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I intend to use only HTTP access.
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We currently peer with 2 ISPs using BGP in an active/failover configuration. My company wants to move to a 3 ISP model where Internet traffic is split across the 3 providers so that bandwidth is equally distributed on outgoing traffic across our 2 /22 ARIN IP ranges. This is from our 2 edge switches that have VSS.
Within my limited knowledge of BGP, I have determined that we could do load sharing pretty easily by adding multiple default routes and breaking up our /22's into /24 and advertising them that way. However, I don't think this satisfies the request that downtime must be seamless, should one link drop.
Currently, our ISP's advertise default routes. From the research that I've done, we could get close to load balanced links if we receive full BGP routes and community settings and definitions. I'm nervous about this because it looks really complicated, and I don't want our AS to turn into a transit AS. I've been told the same can be accomplished with only partial BGP routes and community settings and definitions.
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Thanks!

Hi there
First question would be what is the required reconvergence time for the applications using the Internet? Should an outage occur, when do they lose their state? Once you know that, you then have a target to aim for in terms of recovery
With regards load-balancing, with BGP we are always talking inbound and outbound.
The outbound solution is relatively simple - each ISP advertises a default route to your Internet edge router(s). Create an eBGP session from each edge router to the core, advertise the default route and redistribute into the IGP. Ensure the IGP cost to each BGP next hop is equal and you have ECMP for outbound routing.
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Load balancing with intermediate Driver IM

Hello Everyone,
Im Completely Lost now, im pretty new to WDK and im trying to understand the best way to implement the following :
Problem : I want to send Traffic across multiple interfaces as per a loadblancing algorithm that i will make, its UnEqual Loadbalancing , So all of the traffic for example coming from my system (just say like vpn solution) will go through
the load balancing algorithm.
My Solutions which are not Right for sure !
Sol1. IM Driver Mux that will do 1-N , in here i have to create a protocol Driver as well and Attach my IM to the protocol and the minport on each interface i Want to use in my Load balancing .
How to tie all of the traffic on my system to have a next hop being my Load balancer , do i need a virtual miniport and change the routing table of my system as well ?
Sol2. Make a protocol Driver Attach it to the physical interfaces, then make a virtual miniport Adapter, Bind it to the protocol Drivers on many physical interfaces as i want, then implement the Load balancing by send specific traffic to
each protocol seperatly .
Making here the virtual miniport as the next hop of my system by modifying the routing table , then the virtual miniport will take care of the load balancing alogrithm !!
Finally ... Why Do I need to create a protocol Driver while the tcp/ipv4 protocol already installed on the system and present in our physical interfaces already is Enough for me ?? Can I bind to that protocol driver ?
What I described above is what my level of knowledge drove me into, your feedback will REALLY help understand and get out of he confusion .
Best Regards,

No its not a fail-over, my plan was to achieve an unequal-loadbalancing, so say i have 1 ethernet connected to the internet with 100mbps and another 4G usb adapter connected to the same PC, now i have 2 internet connetions on my PC with 2 adapters .the windows
is not going to use them both but actually use one and leave the other idle , i want my IM to use them both so all of the connections coming from my PC are going to be loadbalanced per connection "for now not per packet coz per packet wont work on the internet"
So if im doing a torrent download for example the download actual speed will use both connections in accounting .
Later level i will adjust the algorithm for testing purposes todo loadbalancing per packet and treat them in the other side before it get used .

Load Balancing with BigIP / SSL question

I have an oddball question. We're load balancing ColdFusion
MX7 across 3 servers using a BigIP load balancing server. We
decided to go the hardware approach and it has been great except
for one small configuration issue.
We use a mix of SSL and non SSL pages, prior to the switch
from a single server to a load balanced setup I used to script that
would determine if a page that was supposed to be SSL had the
variable CGI.HTTPS turned on or off. If it was off, the page would
redirect back to itself with the SSL turned on.
The problem we have is that we followed BigIP's instruction
to secure the load balancing hardware instead of the three servers
running behind it. So what happens is that the traffic goes to the
load balancer port 441, but then the calls from the load balancer
to the individual servers is port 80. So even if a page is called
as HTTPS://... the coldfusion server says that CGI.HTTPS is "off"
since the traffic is port 80.
This isn't much of a problem, our SSL pages are linked as
HTTPS:// and the only problem would actually arise if someone was
to type in the URL and call it as HTTP rather than HTTPS.
My questions is this, does anyone know of a way that I can
detect if the page should be HTTPS and is not without changing our
configuration and putting SSL certificates on each individual
server?

Hey,
Well the load balancing with the BigIP device is really very
amazing. I think
what i liked most was swapping out servers when their lease
was up, through the
BigIP manager I just stopped all traffic to a server, shut it
down, plugged in
the new one and turned traffic back on. It was really very
easy.
The SSL stuff still gives me a headache to think about. but
I should mention I
no longer work where I was, plus now I'm all .net C# but
that's a different
story.
I think if I was going to do this all again I would not have
secured the bigIP
unit. It was nice to buy one SSL cert for all the servers I
attached rather
than one per server, but getting the SSL sites to work
properly was a headache.
We also use windows file replication where now I would go
with like a pair of
Dell MD1000's mirrored for storage and just have tons of ram
and cpu on the
front end units. Depends what you want to spend I guess. I
think the bigIP unit
we bought was like 20 grand, i think they are cheaper now
though.
Hope I helped.

How does load-balancing with WebCache work - is there still a bottleneck?

Hello,
We're migrating an old Forms 6i app to 10.1.2.0.2 (apps servers = Redhat Linux), and are starting to consider using WebCache to loadbalance between two application servers.
My question is this - say we have apps servers A and B, both running Forms and Reports Services. We use Webcache on server A (don't have the luxury of a third apps server...) to load balance between A and B. So all initial requests come into A, which in some cases may then be diverted to start a new Forms session on B.
For those users whose middle-tier sessions are now running on B - will all network traffic for their Forms session continue to be routed through Webcache on A, then to B, over the course of the session? Or does Webcache somehow shunt the whole connection to be straight between the client PC and server B, for the duration of that Forms session?
If the former, does that mean that the server hosting Webcache can still be a significant bottleneck for network traffic? Have people found load-balancing with Webcache to be useful..?
Thanks in advance,
James

Hi gudnyc,
Thanks for posting on Adobe forums.
For HDPI you do not have to do any It will adjust automatically.
http://helpx.adobe.com/photoshop-elements/using/whats-new.html
Regards,
Sandeep

Load Balancing With Round Robin

Hi,
I have two iAS instances, each on their own box, and one iWS instance
running on a third box. I have setup the web connector to use round
robin and added the server weights. I believe that is all that is to it
to do simple load balancing with iAS. The problem is is that the
requests only go to one iAS instance. The server weights are 1 and 1.
Am I missing something here?
Thanks

Could be lots of things.
The most common misconfiguration is testing an application that is deployed "local". This application option effectively disables load balancing.
Another common mistake is to either not update the configuration of the webconnector (if the webconnector
has a seperate configuration LDAP) or to not restart
the webconnector after the configuration change.
Hope this helps. There's more things we could try, but I'll hope its one of these two easy things.

ACE 4710 and load balancing with sticky cookie

Configuring load balancing with SSL termination and stickiness for a couple of citrix xenapp servers. I'm doing a source-NAT as the ACE resides in the DMZ and these particular servers reside on the inside arm of the firewall. The ACE is in bridged mode to load balance web servers that reside in the DMZ. Everything seems to work just fine, but the cookie stickiness does not seem to be working.

Hi David,
As you may know, using Wireshark to look at an HTTPS capture is only useful if you've installed the server SSL key.This is why I find it easier to use something like LiveHTTPHeaders or HTTPWatch.
When using cookie-insert, the ACE will not create any dynamic cookie entries. It will simply create one static entry for each rserver with a cookie value, such as R3911631338, and any client that gets load balanced to that rserver will receive a cookie with that value. So what you see there is what is expected.
You are correct in that when using location cookies that the server supplies, the ACE will create a dynamic entry when it sees the server response with the cookie. The cookie is included in the server's response, and the ACE will look for the value as configured. The cookie will also be sent to the client. If the cookie is not in the server's first response, you will need enable persistence-rebalance so that it will look in subsequent server responses. If the browser opens new connections with that cookie, then the ACE will stick to the same server.
My suggestion would be to get sticky working with cookie-insert first. Then if that meets your needs, go with that permanently. If you need to use server cookies, then once cookie insert is working, migrate your sticky to cookie location.
Sean

Hyper-V 2012 R2 & NLB (Network Load Balancing) with Unicast on VMs

Hi,
We set up a 2012 R2 Hyper-V Cluster. On this Cluster we would like to run 2 VM's which are using NLB (Network load Balancing) in Unicast mode.
We have created a External Virtual Switch wich is connected trough a 3x10GB LACP Team to a Cisco Nexux Switch.
We have tried to set the NLB up in the way we did with 2008 R2 but we were not be able to get this working. Is there any Change in 2012 R2 we did not think about?
Each time we form the Cluster one Node becomes unavailable.
Timo

Check the virtual network adapter properties - you must enable MAC address spoofing. We had the same issues.
Note that this will absolutely pollute your host machine's system log with tons of spam and make it pretty much worthless. I'm trying to find a way around this as we speak, actually.

Using StoneBeat WebCluster load balancing with WebLogic

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