RAC load balancing question

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• Monitoring of Tuxedo 9.1 and RAC load balancing?

  Hi all
  
  I wrote this question in the old forum that BEA [http://forums.bea.com/thread.jspa?threadID=300006084] and now I have more question about monitoring in a tuxedo with RAC load balancing:
  
  How can I control in a tuxedo with RAC load balancing?
  How can I verify that the tuxedo load balancing is running correctly?
  How can I know that this group using my requests?
  
  We need to know if the query uses the instance ORARAC1 (groups of GRP_A1 and GRP_A2) or
  use failure ORARAC2 (groups of GRP_B1 and GRP_B2).
  
  There is a tool (same txrpt) that displays this information in a Tuxedo 9.1?
  
  Thanks in advance
  
  P.D.: Excuse my English

  Hello

  How can I control in a tuxedo with RAC load balancing?

  You can use the tmadmin pq and ESP see work queue of orders and the work done by each server.

  How can I verify that the tuxedo load balancing is running correctly?

  What do you mean by properly? This is an area where many clients think that Tuxedo isn't the load balancing, but in fact it is. In general, Tuxedo will select the first server offering a service that does all work queued to it. If all servers have jobs queued, then Tuxedo will select the server with the least amount of work waiting in line. Specifically, this means that if the system is not enough charge, the first server in the list of servers offering service will receive all applications. Note that this is what happens in a single machine and no data dependent routing and routing CARS in the picture. With data dependent routing or TUXRACGROUPS defined, the algorithm is similar, but the possible servers to consider are limited according to the setting of data dependent routing or TUXRACGROUPS as explained in the note on the other.

  How can I know that this group using my requests?

  Without TSAM (Tuxedo system) and Application Monitor, it will be nearly impossible to tell which groups and servers a particular request was sent to. What you trying to accomplish?

  We need to know if the query uses the instance ORARAC1 (groups of GRP_A1 and GRP_A2) or
  use failure ORARAC2 (groups of GRP_B1 and GRP_B2).

  Without changes to the application or using TSAM, it's going to be very hard to say. Why is it important for your application?

  Kind regards
  Todd little
  Chief Architect of Oracle Tuxedo

• Load balancing question

  Hi all

  I have a question on the load balancing between several hosts of session.

  We have 6 Guest session, I created a managed with a specifik balancing application rule "Session desktop host advanced remotely. last Friday, he started a few problems, but we have not made any changes.

  the fist session host server had 71 active users and other servers were only 30.

  How is that possible?

  Do I have to put the rule on each server load balancing?

  Hello Sander,

  You must apply the rule individually for each RDSH of load balancing. Not on the managed desktop application. In our configuration, this does not work then maybe of the same counts for you.

  concerning

  Sijtze

• Windows Server 2008 R2 Network Load Balance question

  Hello

  I got my hooked VMs when a network load balancing in Windows Server 2008 R2 clustering.

  This only happens for Windows Server 2008 R2, Windows Server 2008 with SP2 is OK.

  And I use VMware ESXi 4, I don't know if this has been addressed in ESXi 4 U1.

  Can someone give some advice?

  Thank you very much

  I would try the update 1 - it correctly supports Windows 2008 R2 x 64, where like esxi4 don't...

• The side load balancing test server

  Hello
  Can anyone tell me about any test cases for server side in a 11.1.0.7 RAC load balancing?
  
  I have a 2 RAC nodes with either local_listener and remote_listener correctly (for load balancing server-side). For the test, I create a TNS to my side client that points to a single node of the PAP (a single ADDRESS entry pointing to node 1 of my CARS). So, this customer, whenever I log in, it always connects me node 1 I mentioned in the LMO. This means that server-side load balancing works jointly with the client side only load balancing and I would also add the address entered my TNS for the second node? If Yes, then how can I create a test case to check server load balancing?
  
  Thank you
  
  Salman

  Dear Salman Qureshi,

  There is a small video about load balancing server (http://www.dsvolk.ru/oracle/racdd4d/demos/video/loadbalance/server/serverloadbalance_viewlet_swf.html)

• Least loaded node load - balancing

  Hello

  Due to dynamic service registration, a listener is always aware of all instances and dispatchers regardless 
  of their locations. Depending on the load information, a listener decides which instance and, if shared server 
  is configured, which dispatcher to send the incoming client request to. In a shared server configuration, a 
  listener selects a dispatcher in the following order:
  
  1. Least-loaded node
  2. Least-loaded instance
  3. Least-loaded dispatcher for that instance
  
  In a dedicated server configuration, a listener selects an instance in the following order:
  
  1. Least loaded node
  2. Least loaded instance

  When we talk about connection (from 9i to Oracle RAC) load balancing it are two things main considered as least loaded node & least loaded instance.
  So what factor should be considered for an average of least loaded node CUP, memory, IO, network or even the number of process running(running,sleep,...) is oracle gather information from top, utility wink to get statistician.
  And when we say least loaded node this factor are considered by oracle is that, as the number of sessions (active, inactive...) "(or killed), using component CMS." Can we say load on node is proportional to the load on the Forum... How oracle identifies and what process does it for balancing.
  
  Any docs or paper?
  
  Thank you

  Hello

  10.1 and oracle 9i

  Less loaded node means less CPU load
  Least loaded instance means less number of connections that have been made to the instance

  'Process' and "instance charge" gives an indication of the number of connections that have been made to the instance.

  "Charge of node" gives an indication of the degree of activity of the machine is. By default, 'charge of node"is the main factor in determining where to go new connections.
  For example, if you have a 2 RAC cluster and instance 1 has a load of instance node and '25' 2 has a charge of '50' node, new connections will be routed to
  instance 1.

  Changes to Oracle 10.2
  In versions of Oracle 10.2 and later, the listener uses a local value "lbscore" to determine the charge of node and instance.
  Lbscore consists of two dynamic values 'kindness' and 'delta' which are continuously updated by pmon.
  When an instance is started PMON will communicate with the listener and provide departure for goodness and the delta values...

  Listener = goodness of PMON Lbscore
  Listener Delta = Delta PMON

  To account for changes in load between PMON updated, the listener will increment the lbscore after each new incoming connection...

  Lbscore listener = listener (previous) Lbscore + earpiece Delta

  With each periodic update load by PMON the Lbscore and Delta are updated with the current data.

  Lbscore = goodness (receipt of updated PMON)
  Delta = New Delta (receipt of updated PMON)

  This note explain everything:
  * Understand and troubleshoot the Instance Load Balancing [ID 263599.1] *.

  Kind regards
  Levi Pereira

• Oracle RAC Concept - load balancing

  Hi all
  
  I have a question about the Oracle RAC and how it balances the load.
  What I know about Oracle RAC that it load balancing between his node, so if a new session is connected to the database it will run on the node that has less load.
  If I have an application that connects to the database with little number of sessions and a few sessions are huge (huge load) implementation process while other sessions are running small processes (in terms of load).
  
  So here's an example scenario that I request a response to this one:
  If am having a two node RAC database.
  
  My application connected to this database RAC wants to run three processes P1, P2 and P3, each will have a session correlatively S1, S2 and S3
  Let's say that P1 will take 60% of database resources (memory) and P2 P3 1% and 1%.
  So my question is this a sessions load balancing or load balancing process? So in this case and at random (Managed by ORACLE RAC) S1 is connected to node 1 and it uses the resources of node 1 so the load on node 1 will be 60%, so when S2 and S3 must connect it will go to node 2 from node 1 is loaded. in this case I'll have 1 node using 60% of it's resources (because of S1 that runs P1) while node 2 uses only 2% (because of the S2 and S3 running P2 and P3).
  Is - this operation of Oracle RAC? or it S1 (60%) load balance between nodes 1 and 2?
  
  I ask this question because my application is not users, so it will connect to the database with the small number of sessions, and 1 session of them can run a huge process while the other runs of small processes.
  So in this case, how RAC takes stock of loading?
  
  Kind regards

  Check out more excellent document on the management of the CAR of James Morle connections:
  http://www.scaleabilities.co.uk/index.php/view-details/whitepapers/12-RAC_Connection_Management.pdf.html

  Registration is required, but free...

  -Mark

• Cisco RV016 failover & load balance Multi WAN question

  Hello

  I think the RV016 is the camera to buy for our small building, but I'm a bit confused in the manual if my scheduled configuration is possible, so if you could confirm if this is possible I would appreciate it.

  We have a leased line as our main connection (lets call him WAN1). If this connection is not available, I don't want to load balance to any other network WAN.

  We have 2 netgear 4G devices identical (we'll call WAN 2 and 3 WAN). If the leased line is not available, I would like to then load balance these two WAN connections.

  Then I have a final connection, WAN4 as a slow adsl line. I don't know right now if I want to load balance this WAN1 or just have it as a backup to WAN2 and WAN3 failure (WAN2 and WAN3 have a 20 GB data limit each on their monthly allowance of the contract, if the leased line is down for more than a couple of days, what is unfortunately already happened) (then we reached this limit and then there is charged with extremely expensive data or just use the only ADSL)

  In any case, it's normal, I want to balance the load. I want to only load balance WAN3 and WAN2 WAN1 fails.

  Anyone know if this is possible? If not, is there any other similar device which would be appropriate?

  Thank you

  Ben

  Hi Bencarroll01,

  With RV016 you can get what you need.

  RV016 supports up to 7 WAN connection, and there are two mode of operation

  • Swing smart (Auto Mode): This option allows you to balance traffic between all interfaces increase the available bandwidth. The router balance traffic between the weighted alternating interfaces.
  • Group of IP (by users): Select this option for trafficking group on each WAN interface by levels of priority or classes of service (CoS). With this feature, you can ensure the bandwidth and a more high priority for specified services and users. All traffic that is not added to the IP group uses Intelligent balancing mode. To specify the services and users, click modify for the WAN interface and then add the entries of binding protocol for each service, IP address or IP address range.

  For our case, we must have RV016 configured with IP Group(By User), so in this case, we can configure binding protocol that we can specify and force all traffic from any IP address of the local network outside through WAN1. and any other WAN connection they always towards the TOP but not the traffic passing through them

  Now if WAN1 is down, immediately the rule to redirect traffic WAN 1 will be disabled and all traffic will pass through the rest of the WAN connection

  After that if the WAN1 is once again the binding protocol rule will be active again and again all the traffic will be done by WAN 1

  Please let me know if you have any other questions

  Please rate this post or marked as replied to help other customers of Cisco

  Greetings

  Mehdi

• Configuration of AppsTier (CFP, load balancing) of nodes R12 Multi with RAC 2 nodes

  Dear all,
  
  I installed and configured applications R12 with Oracle RAC 2 nodes. (APP1, DB1 and DB2).
  
  Now, I need to add a layer of application (APP2) to configure high availability, balancing load and PCP.
  
  So, I cloned (adcfgclone.pl appsTier) application for APP2 layer (not shared, the two file systems are different). When I run the application it doesn't knot APP2 App1, more more simultaneous manager works only on a node (can be due to APPLCSF does not point to the mounting NFS share folder), although I've defined managers primary school-children also.
  
  If I run the autoconfiguration of APP1 application service will only work on APP1 and even if I do for APP2, then application works with APP2. I need to have configuration CFP, balancing the load (via DNS if possible) and the high availabllity for the Application tier.
  
  When I start the application, it will start OPMN and APPS Listener on the nodes, but simultaneous manager does not start on both, to a single node.
  
  Is this requires having both APPS name of the node is the same?
  
  Thank you very much
  
  Ravi Purbia
  
  Published by: Purbia delighted on June 9, 2009 18:04
  
  Published by: Purbia delighted on June 9, 2009 18:05
  
  Published by: Purbia delighted on June 9, 2009 18:07

  Ravi,

  If I run the autoconfiguration of APP1 application service will only work on APP1 and even if I do for APP2, then application works with APP2.

  Most likely, it's something with the profile option values, then run utility adchkcfg to get an html report that lists all files and profile options that change when you run AutoConfig on each node.

  I need to have configuration CFP, balancing the load (via DNS if possible) and the high availabllity for the Application tier.

  For load balancing, you must perform the steps according to the guidelines of this document.

  Note: 380489.1 - using Load-balance with Oracle E-Business Suite Release 12
  https://metalink2.Oracle.com/MetaLink/PLSQL/ml2_documents.showDocument?p_database_id=not&P_ID=380489.1

  For the installation of the CFP, please see:

  Note: 388577.1 - using Load-balance with Oracle E-Business Suite Release 12
  https://metalink2.Oracle.com/MetaLink/PLSQL/ml2_documents.showDocument?p_database_id=not&P_ID=388577.1

  When I start the application, it will start OPMN and APPS Listener on the nodes, but simultaneous manager does not start on both, to a single node.

  Any errors in the log file of CM?

  Is this requires having both APPS name of the node is the same?

  It is not necessary.

  Kind regards
  Hussein

• Load balancing ASA question - what IP I do direct clients too?

  I have 2 5520 with SSLVPN 50 user on each license. I want to use the VPN load-balancing feature. Must I send users to the address IP of Cluster? The documentation is not clear on this point.

  Thank you

  Justin

  That is right. You should have the VPN to connect on the LBS, not individual IP addresses cluster IP. Captain ASA will listen to connection requests to the IP cluster LB and based on the load either accepting the connection or automatically redirect to one of the ASAs Eve in the cluster. It must all be transparent to the user VPN connection.

• PIX OSPF question load balancing

  I have a pix 515e with two default routes, via OSPF from two routers on the "outside" interface

  Route #2 is currently being preferred spending much more than the #1 router. There are thousands of destinations for traffic. These two routers are still NAT nat rfc1918 IP Internet (the pix doesn't nat)

  Can you get it someone please let me know how the PIX is load balancing? is it by destination IP address? is it something else?

  Thank you

  Joe

  TAC:

  "the PIX will be per destination load balancing instead of by package

  load balancing. The algorithm will look at the source and destination

  addresses. It is not 1:1 load balancing. Given quite different

  the source address and destination, the packets will reach more or less one

  spindle of 50-50 between the two next-hops. However, in the real world test

  with the same source and destination addresses, it may not reach the same

  load balancing. »

• Client based in 12 G load balancing

  We have a JDBC configuration against an address scan with client load balancing enabled.

  Example:

  JDBC:Oracle:Thin:@(Description=(LOAD_BALANCE=on)(Address=(Protocol=TCP)(Host=xxxxxxxxxxxx.de)(port=xxxx))(CONNECT_DATA=(service_name=XXXXXX)))

  What I understand of Diference between Client-side and Server Load Balancing If you do not use the server load balancing, you can bypass by connecting the service that identifies a particular node of RAC name.

  
  

  My question is, if you have a connection pool object this configuration and if the name service maps node to goes down, what happens to the connection connection pool?

  
  

  Issue 1) Don't scan address switches to the available according to the name of the service node, then the JDBC driver on the client must file all embusked connections and reconnect the available node? or is all the agnostic client failure of node on and all the old connections available in the pool are available for use?

  
  

  
  

  The client side or server balancing side basically works for the same purpose. The difference is that you do not have all the customers to reconfigure then change something in the environment, such as adding or removing a node such as the side server.

  Answer your question...

  If you mean the shared server architecture by connection pool, the shared server session connected to node 1 will die and everyone shares this session should log. Failover is not automatic, you must specify the failover clause in the JDBC or TNS connect string:

  TEST_TAF =

  (DESCRIPTION =

  (ADDRESS = (PROTOCOL = TCP)

  (HOST = rac - scan.example.com) (PORT = 1525))

  (CONNECT_DATA =

  (SERVICE_NAME = test)

  (FAILOVER_MODE = (TYPE = SESSION) (METHOD = Basic))

  ) )

  Or if you use failover and load balancing services you set failover described below:

  for 12 c: srvctl $ add orcl db-test - oel6vm1 favorite-available oel6vm2 - tafpolicy BASE - failovermethod SESSION service service - failoverretry 5 - failoverdelay 60

  for 11g: $ srvctl add service d orcl if test - r oel6vm1 - oel6vm2 BASIC EI SESSION m - z 5 AW 60

  Was what you mean?

• load balancing server-side

  Hi all
  
  I'm using Oracle RAC 11 g R2. I have a question for load balancing server-side.
  
  If I have 3 sessions that are already connected to node 1 and it is running on node 1.
  
  The balance of the load moves a session to node 2, node 1 is still in place but is charged more then node 2. and the session already connected to node 1?
  
  Kind regards

  The balance of the load moves a session to node 2, node 1 is still in place but is charged more then node 2. and the session already connected to node 1?

  If you are already connected, you'd be here on the same node, even if it becomes unavailable. There will be no movement of the sessions from one node to another by oracle since load balancing server-side is only at the time of connection .

  Aman...

• Correct settings to use Smart Connect and load balancing?

  Hi guys

  I have a question, the answer of which I was not able to find explicitly, so I hope a quick fix OK / not OK for you:

  I would use tri-band technology provides the R8000, i.e. to activate Smart Connect / load balancing. Is - it only works Ghzs 5 band, or the router can also connect clients on the 2 Ghz bands?

  If this is true, then I need to give the strip of 2, 4 GHz the SSID the same 5 Ghz band, correct?

  Otherwise, if it only works in the 5 Ghz bands, I could keep the SSID distinguishes?

  Thank you

  Balancing of resources between the two radios. 2, 4 GHz band vs a single radio, the two radio channels in the 5 GHz band.

• Nexus 1000v, UCS, and Microsoft NETWORK load balancing

  Hi all

  I have a client that implements a new Exchange 2010 environment. They have an obligation to configure load balancing for Client Access servers. The environment consists of VMware vShpere running on top of Cisco UCS blades with the Nexus 1000v dvSwitch.

  Everything I've read so far indicates that I must do the following:

  1 configure MS in Multicast mode load balancing (by selecting the IGMP protocol option).

  2. create a static ARP entry for the address of virtual cluster on the router for the subnet of the server.

  3. (maybe) configure a static MAC table entry on the router for the subnet of the server.

  3. (maybe) to disable the IGMP snooping on the VLAN appropriate in the Nexus 1000v.

  My questions are:

  1. any person running successfully a similar configuration?

  2 are there missing steps in the list above, or I shouldn't do?

  3. If I am disabling the snooping IGMP on the Nexus 1000v should I also disable it on the fabric of UCS interconnections and router?

  Thanks a lot for your time,.

  Aaron

  Aaron,

  The steps above you are correct, you need steps 1-4 to operate correctly.  Normally people will create a VLAN separate to their interfaces NLB/subnet, to prevent floods mcast uncessisary frameworks within the network.

  To answer your questions

  (1) I saw multiple clients run this configuration

  (2) the steps you are correct

  (3) you can't toggle the on UCS IGMP snooping.  It is enabled by default and not a configurable option.  There is no need to change anything within the UCS regarding MS NLB with the above procedure.  FYI - the ability to disable/enable the snooping IGMP on UCS is scheduled for a next version 2.1.

  
  
  This is the correct method untill the time we have the option of configuring static multicast mac entries on
  
  the Nexus 1000v.  If this is a feature you'd like, please open a TAC case and request for bug CSCtb93725 to be linked to your SR.
  
  This will give more "push" to our develpment team to prioritize this request.
  Hopefully some other customers can share their experience.
  Regards,

  Robert