Oracle RAC private interconnectivity problem

Similar Questions

• Oracle 10g RAC - private interconnection on VLAN not routable private

  There is in our data center existing Oracle 10g RAC configured with VLAN private interconnection managed by a different group of DBA.
  
  We create a new, separate Oracle 10 g RAC environment to support our request.
  
  When we discussed with our data center people to set up a local VIRTUAL private network for our CARS of interconnection, they suggest to use the same VLAN used by the other Oracle RAC configurations existing private. In this case the IPs of interconnection will be on the same subnet as the other Oracle RAC configurations.
  
  For example, if
  RAC1 with 2 nodes use 192.168.1.1 and 192.168.1.2 in the VLAN_1 for the Interconect, they want us to use the same VLAN_1 with interconnecting IP 192.168.1.3 and 192.168.1.4 to our 2 node RAC.
  
  Share the same subnet on the same private VLAN for the interconnection of different configurations of RAC, supported?
  Which will cause a drop in performance? This means the IPs of a RAC interconnect configuration is to pings from other RAC configuration.
  
  Someone met with such purpose?
  
  Could not find any info on it on Metalink.
  
  Thank you

  Yes
  It is practically very doable... as you would have only 4 m/c in subnet ip... and it is much less than the public subnet that we should abstain from interconnection.

• NICs for redundancy private interconnection

  Version of DB/grid: 11.2.0.2
  Platform: AIX 6.1
  
  We will install a RAC 2 nodes on AIX (that thing that is almost good as Solaris)
  
  Our primary private interconnection is

  ### Primary Private Interconnect
  169.21.204.1      scnuprd186-privt1.mvtrs.net  scnuprd186-privt1 
  169.21.204.4      scnuprd187-privt1.mvtrs.net  scnuprd187-privt1

  For redundancy of the inteconnect Cluster, Unix team has attached an additional NIC for each node with an additional Gigabit ethernet switch for these cards.
  
  
  
  

  ###Redundant Private Interconnect attached to the server
   
  169.21.204.2      scnuprd186-privt2.mvtrs.net  scnuprd186-privt2  # Node1's newly attached redundant NIC
  169.21.204.5      scnuprd187-privt2.mvtrs.net  scnuprd187-privt2  # Node2's newly attached redundant NIC

  Example borrowed from the post of citizen2
  
  
  Apparently, I have 2 ways to implement redundancy of cluster inteconnect
  
  Option1. NIC binding at the OS level
  Option2. Let the grid software to do
  
  Question1. What is the best: Option 1 or 2?
  
  Question2.
  With regard to option 2.
  Googling and OTN, I believe that, during the installation of the grid provide you just 169.21.204.0 to inteconnect to cluster and grid will identify the redundant NIC and switch. And if something goes wrong with the installation of primary interconnection (above), grid automatically réacheminera interswitching traffic using the redundant NIC configuration. Is this correct?
  
  
  Question 3.
  My colleague told me, to the redundant switch (Gigabit) unless I have set up some multicast (specific AIX), I might get errors during installation. He has not clearly what it was? Anyone in front of multicast related question on this?

  Hello

  My recommendation is you use the AIX EtherChannel.
  The EtherCannel of AIX is much more powerful and stable compared to HAIP.

  See how to configure AIX EtherChannel on 10 Gigabit Ethernet interfaces
  http://levipereira.WordPress.com/2011/01/26/setting-up-IBM-power-systems-10-Gigabit-Ethernet-ports-and-AIX-6-1-EtherChannel-for-Oracle-RAC-private-interconnectivity/

  If you choose to use HAIP I recommend to read this note and find all the notes on the bugs of HAIP on AIX.

  11 GR 2 Grid Infrastructure redundant Interconnect and ora.cluster_interconnect.haip [1210883.1 ID]

  ASM crashes as HAIP Does not failover when two or more private network fails [1323995.1 ID]

  On the multicast, read:
  Infrastructure 11.2.0.2 grid or upgrade installation may fail because of the requirement of multicast [1212703.1 ID]

  Kind regards
  Levi Pereira

• Interesting discussion on Oracle RAC

  Hi Pros,

  I have 12 servers to database and 2/place and 2 10 GB switches for interconnection. I organized the 3 Group (dataguard RAC system) servers that each contains 4 servers where 2 nodes for primary CARS and 2 knots to rescue CARS. Here, 1 storage for primary CARS and 1 strandby CCR storage (storage space is also divided for CARS). Each switch is shared between 3 RAC systems. But later I discovered that its recommended that CARS have dedicated switch.

  Now I have to decide if I should buy 4 switches more than 10 GB or I need to rearrange 3 both CCR nodes in 1 system of six RAC nodes (and also 1 six RAC nodes standby).

  I want to discuss the pros and cons of the RAC systems vs a RAC separate system in an organization. Version RAC is 11.2 and not yet all pluggable DB or DB Cloud.

  Thanks in advance

  Number of ports on the switches?

  It is a loss for the purchase of 4 switches, when the existing switches are switches to port of 32 or 64 - which means a lot of ability.

  You can use the existing pair of regional switches like interconnected switches for several advisory boards. There are separate of each other regional advisory councils RAC interconnect traffic.

  According to the used switches, you may consider partitioning of switch ports - create 4 partitions of 12 ports each, for example, for 4 CARS. Or private subnets can be used. Etc.

  The recommendation that the private interconnect switch is based on the fundamental requirement that interconnection is a dedicated, high performance and low latency network. A network share does NOT meet these requirements.

  But whether you use 2 switches for a 12 RAC node, or 2 switches for 4 x 3-node CCR - cluster physical footprint is the same.

  In this case, the issues are cost, redundancy and growth. Can you get 8 switches of 6 or 12-way for these 4 (2 switches by RAC) RAC. Or get you 2 32-port switches instead? And if you already have 2 32 ports switches, what then?

  For example, we use the same type of switches (think that the model can even be the same) than what Oracle uses to the Exadata Database Machine - Infiniband. With our last purchase, we bought 2 Infiniband QDR (40 GB) switches. And using partitioning, these pair of switches will eventually support 4 CARS. Which is no different than using a full basket Exadata with 4 RAC separate databases on it.

• How Oracle Clusterware Oracle RAC and 3rd-party Clustering with them

  I have some questions on how Oracle, Oracle RAC and 3^rd party clustering CLusterware fit between them.

  Q1. My understanding is that the Infrastructure Grid Oracle Clusterware is Oracle's Clustering solution that allows applications to cluster? that is, it is a general clusterware solution to compete with those already on the market. Is this correct?

  Q2. So why CARS is necessary for the Oracle cluster databases? An Oracle database is not just considered one application like any other? So why can not just use you GI / Clusterware to gather what you would do for any other application? Why so you need RAC to the Clusterware Summit?

  Q3. Is it is possible to combine an Oracle database using 3^rd party of clustering and not use Oracle Clusterware and CARS at all that is can you say cluster, an Oracle database using say Sun Clusters, Clustering AIX or Linux native same clustering?

  Q4. If the RAC is purely for Oracle Cluster databases - what is with the title "Real Application Clusters"? What's real on this subject?, what to ask?

  Q5. I also read that RAC can use 3^rd party of clustering. However if you decide that this is the case, then you need to install Oracle Clusterware when even (I think for interconnection must be created to allow the merger with Cache between Instances of node?).

  Is this the case?  If yes why never bore you with 3^rd party clusters? -Since you will have to install Oracle Clustering anyway - and I probably have to license (all I can think about is the scenario that you already have a cluster of 3^rd party in place and you decide that you need to use the same material for a database cluster)?

  All wisdom greatly appreciated,

  Jim

  Yes, with 10g, you had to use the CRS, and with 11g, to use the GI.  For 9i RAC, you would use Verits Cluster and Sun Cluster or anything else.

  11g RAC to GI.  As above, you can use clusterware extra if needed.  I gave the example above where to a 10g RAC we used the CRS to the cluster database/listener/vip and allowing groups of volume and filesystem in HACMP cluster.  File systems were not shared, but could switch to another node failure node, who has been treated by HACMP.  The volume of the groups containing the raw devices were shared volume groups.  For 11g, I never used extra clusterware on top of CRS and have always used ASM which is part of the GI.

  The application provider only certified database to run on 10g on AIX with raw devices.  What is strange about that?  It would be unusual that you probably expect to use ASM instead of raw devices, but it is what it is.

  See the following Note of Oracle for more information: using Oracle Clusterware with vendor Clusterware FAQ (Doc ID 332257.1)

  It is perhaps easier to explain if you can explain what problem you are trying to solve?

• Could not find an appropriate interface for the private interconnection range

  I'm going to install RAC 11.2.0.2 on two nodes REDHAT linux.
  
  I ran runcluvfy pre crsinst, he gave me warning as follows:
  Could not find an appropriate interface for the private interconnection range.
  
  I asked her to use a different subnet as public interconnection for interconnecting private as well as the name / etc/hosts also set private ip addresses. Private ip address is not defined in the DNS system.
  
  .runInstaller also not will pop up the Ethernet because private interconnection over choice of network.
  
  What to do to solve this problem?
  
  Thanks in advance.

  You can temporarily change the mask of 255.255.255.0 on eth3 and see if YES recognizes eth3?

• Why oracle RAC 11.2.0.2 give more trouble than oracle 11.2.0.1?

  Hi all
  
  I just want to know, why oracle RAC 11.2.0.2 giving more problem than oracle 11.2.0.1?
  The problems here:
  
  1 resolved multicast (multicast open or patch)
  Miladin Modrakovic through. His blog issue-with-oracle-11-2-0-2-new-redundant-interconnect give me a solution to open Multicast 230.0.1.0 on cisco switch
  
  2 DNS problem (PRVF-5636: DNS response for an unreachable node time exceeded "15000" ms)
  Someone has already asked on this forum: runcluvfy failed with PRVF-5636, but still no solution for this problem of PRVF-5636.
  
  
  
  
  Thank you
  
  
  Indra
  
  Published by: indra on Sep 6, 2011 12:00 AM

  Hello

  I just want to know, why oracle RAC 11.2.0.2 give me more problem than oracle 11.2.0.1?

  You can use Oracle Support to fix all bugs on Oracle software. Simply open the SR

  1 resolved multicast (multicast open or patch)

  This bug is documented for the Clusterware installation, find the Bug 9974223:
  http://download.Oracle.com/docs/CD/E11882_01/READMEs.112/e17129/TOC.htm#CHDIEHCH

  * Oracle Grid Infrastructure 11.2.0.2 Installation or upgrade may fail due to the requirement of multicast [1212703.1 ID] *.

  2 DNS problem (PRVF-5636: DNS response for an unreachable node time exceeded "15000" ms)

  This isn't an Oracle problem, but a DNS problem that can cause instability in the clusterware, YES does not proceed without resolving the problem in your nodes.

  Date of arrival:

  /etc/resolv.conf
  /etc/nsswitch.conf
  
  find line hosts:  on file nsswitch.conf
  The order of keywords on this line indicates the order in which your SO references the name services. (dns or host file) 
  

  Kind regards
  Levi Pereira

  Published by: Levi Pereira Sep 5, 2011 14:08

• Oracle RAC and replacement of equipment

  Hello world

  next year our Oracle RAC (hardware) servers will be is more supported. We have a 2 node RAC (SE) running on Linux 5. For you, what is the strategy easier (and safer) to replace the equipment:

  • Reinstall complete with database exports / imports.
  • Adding new nodes to the cluster with new servers and delete 'old' (but it seems that the same version of operating system is required in accordance with the documentation).
  • Clone of the cluster according to the Oracle documentation on news servers.

  Thank you for all your ideas. I googled a bit, but I've not found much info.

  Carlos.

  • Adding new nodes to the cluster with new servers and delete 'old' (but it seems that the same version of operating system is required in accordance with the documentation).

  It's what I strive for. If your time with new nodes in the cluster is short (less than 24 hours), and you stay on the same distribution (i.e. OL5 to OL7), then several times, this isn't a problem. If you still have concerns and do not feel comfortable with this recommendation, then I'll recommend another avenue. I often used it when I was doing something similar for the production system was too critical to take no risk.

  1. Up new servers in a cluster. You can even start with the version of grid Infrastructure more later/more big who can save a future update maybe you.
     1. It will take a new OCR and voting disk new configuration.
  2. Attach the storage shared on the new cluster. For a short period of time, you will have storage mounted to both old and new.
  3. Install the RDBMS software on the new cluster. Wear on all the config files you might need more... tnsnames.ora, sqlnet.ora, etc..
  4. When you are ready to drop the database on the old cluster, cutting on the new cluster.
  5. Use "srvctl database add" to add the database to the new cluster.
  6. Use 'srvctl add instance' to add the instances to the new cluster.
  7. (Optional but normally a good idea), use 'srvctl add service' to add services to the new cluster.
     1. Steps 5 and 6 above usually use the same name of db, same instance names, same service name.
  8. You now have the database running on the new hardware. Stop the old servers

  The only other sticking point would be handling the SCAN and traditional VIP. When I made this drive, I usually my network guy change the SCAN VIP and traditional dignitaries to be alias in DNS that point to the new VIP.

  If you do your homework and have everything ready to go, the downtime can be less than 15 minutes for this approach.

  See you soon,.
  Brian

• Java oracle rac connection using scan url

  Hey,.

  Im trying to connect to an oracle rac using jdbc thin. When I use the analysis as the host

  Like this

  String url = "jdbc:oracle:thin:@// < scan >: port/servicename;

  I get error 1153, connection refused

  but when I use the ip address of the RAC instead of analysis

  String url = "jdbc:oracle:thin:@// < ip >: port/servicename;

  the connection is successful

  is the issue at the level of the application? or is the problem with the server

  Thanks for the help.

  I solved the problem. I changed my ojdbc.jar from 14 to 6. I would like to know why it works because I've been using ojdbc14 for oracle 11g and I've never had a problem

• Oracle RAC 12.1.0.2 (GI battery) deployment on OEL 7 (3.8.13 - 35.3.4.el7uek) fails with ORA-27102

  Hi guys,.

  I am currently trying to deploy a complete installation (GI battery) of Oracle RAC 12.1.0.2 cool on OEL 7 (3.8.13 - 35.3.4.el7uek) with 2 nodes for validation purposes. However the installation itself went well, but 'Creation repository for Oracle Grid Infrastructure Management container' step fails with "ORA-01034: ORACLE not available / ORA-27102: out of memory / Linux-x86_64 error: 12: cannot allocate memory". The steps of runInstaller validation completed successfully, but I never take this step of configuration without jumping.

  Here is my configuration which should normally avoid such errors ORA.

  Host

  -bash - $4.2 uname - a

  Linux OELRAC1 3.8.13 - 35.3.4.el7uek.x86_64 #2 SMP Tue Jul 29 23:24:14 CDT 2014 x86_64 x86_64 x86_64 GNU/Linux

  "Creation of repository database for Oracle Grid Infrastructure Management container" error in /oracle/base/cfgtoollogs/dbca/_mgmtdb/trace.log

  From restoration to August 9, 14

  allocated channel: ORA_DISK_1

  channel ORA_DISK_1: SID = 12 type of device = DISK

  channel ORA_DISK_1: from the restore backup set data file

  channel ORA_DISK_1: specifying datafile (s) to restore from backup set

  channel ORA_DISK_1: restore datafile 00003 to + GRID

  channel ORA_DISK_1: backup /oracle/grid/12102/assistants/dbca/templates/MGMTSeed_Database.dfb piece reading

  channel ORA_DISK_1: ORA-19870: error when restoring the backup /oracle/grid/12102/assistants/dbca/templates/MGMTSeed_Database.dfb piece

  ORA-19504: could not create the file "+ GRID.

  ORA-17502: ksfdcre:4 cannot create the file + GRID

  ORA-15001: diskgroup 'GRID' does not exist or is not mounted

  ORA-01034: ORACLE not available

  ORA-27102: out of memory

  Linux-x86_64 error: 12: cannot allocate memory

  Additional information: 2663

  Additional information: 1565392897

  Additional information: 161480704

  switch to the previous backup

  Number of folder of the data file = 3 name = + GRID

  RMAN-00571: ===========================================================

  RMAN-00569: = ERROR MESSAGE STACK FOLLOWS =.

  RMAN-00571: ===========================================================

  RMAN-03002: failure of the restore command at 09/08/2014 19:41:47

  ORA-01119: error in creating file of database "+ GRID.

  ORA-17502: ksfdcre:4 cannot create the file + GRID

  ORA-15001: diskgroup 'GRID' does not exist or is not mounted

  ORA-01034: ORACLE not available

  ORA-27102: out of memory

  Linux-x86_64 error: 12: cannot allocate memory

  Additional information: 2663

  Additional information: 1565392897

  Additional information: 1614807040

  RMAN-06956: create the data file failed; try again after removing + OS GRID

  SHM / CPI (check the id of shm with previous information)

  -bash - $4.2 ipcs - a

  -Shared memory segments-

  key shmid owner perms bytes nattch status

  1565360128 0 x 00000000 grid 640 4096 0

  1565392897 0 x 00000000 grid 640 4096 0

  0xfba47600 1565425666 640 24576 29 grid

  Memory of the ASM instance setting

  SQL > see the memory settings

  VALUE OF TYPE NAME

  ------------------------------------ ----------- ------------------------------

  whole big memory_max_target 1076M

  whole large memory_target 1076M

  ASM disk groups

  SQL > select NAME, STATE, TOTAL_MB, USABLE_FILE_MB from v$ asm_diskgroup;

  NAME STATE TOTAL_MB USABLE_FILE_MB

  ------------------------------ ----------- ---------- --------------

  RACK MOUNTED 6144 4868

  / dev/shm to memory_target (more than enough free space)

  -bash - $4.2 df-h

  Size of filesystem used Avail use % mounted on

  tmpfs, 630M 2.4 G 3.0 G 21% / dev/shm

  Kernel for SHM limits set to unlimited parameter

  -bash - $4.2 sysctl - a | grep shm

  kernel.shmall = 1152921504606846720

  kernel.shmmax = 922337203685477580

  User limits on unlimited for memory

  -bash-4, $ 2 cat /etc/security/limits.conf

  # Oracle settings

  grid soft nproc 2047

  grid hard nproc 16384

  grid soft nofile 1024

  grid hard nofile 65536

  Oracle nproc 2047 soft

  Oracle nproc 16384 hard

  Oracle soft nofile 1024

  Oracle hard nofile 65536

  * hard memlock unlimited

  * soft memlock unlimited

  -bash - 4, $ 2 known - grid

  -bash - $4.2 ulimit - a

  the file size (blocks, - c) of base 0

  (kbytes, - d) data seg size unlimited

  scheduling priority (-e) 0

  size of the file (blocks, f) - unlimited

  pending signals (-i) 23953

  Max locked memory (kbytes, - l) unlimited

  size of the memory (k, m) max - unlimited

  open files (-n) 1024

  a size (512 bytes, - p) 8 hose

  (Bytes, - q) POSIX message queues 819200

  real-time priority (-r) 0

  size (Ko, - s) 8192 battery

  time processor (seconds,-t) unlimited

  Max user process (-u) 2047

  virtual memory (KB), - v) unlimited

  the locks on files (-x) unlimited

  So what the hell is wrong here? Why the instance ASM (+ ASM1) returns the error below, even if there is no memory limit / problem. The error with the disk group is also absolutely no sense.

  ------------------------------------------------------------------------------------------------------------------------

  ORA-01119: error in creating file of database "+ GRID.

  ORA-17502: ksfdcre:4 cannot create the file + GRID

  ORA-15001: diskgroup 'GRID' does not exist or is not mounted

  ORA-01034: ORACLE not available

  ORA-27102: out of memory

  Linux-x86_64 error: 12: cannot allocate memory

  Additional information: 2663

  Additional information: 1565392897

  Additional information: 1614807040

  ------------------------------------------------------------------------------------------------------------------------

  Someone at - he encounter the same problem with 12.1.0.2 by deploying the CDB for Grid Infrastructure Management repository? Is there something special with UEK3 (3.8.13 - 35.3.4.el7uek) on 7 OEL? Any necessary special kernel parameter (although the runInstaller controls do not mention)? I'm totally tapped by GI 12.1.0.2.

  Thank you.

  Best regards

  Stefan

  Hi guys,.

  I was finally able to solve this problem.

  She was related to a memory on the provisioning of problem in the virtual environment as both nodes are VMs. Unfortunately none of these errors of memory were populated / pushed somehow in the virtual machine.

  Best regards

  Stefan

• Change password for an Oracle RAC installation account

  All,

  I'm not an Oracle DBA, but currently I am asked to fill in until a certified Oracle DBA lights.  I work with MS SQL Server and have servers managed for some time.

  That being said, my question is probably a simple.  In the Oracle 11 g RAC 2 installation guide, it tells you * must * use an account that exists on both servers to install.  So far, so good, we have a domain dedicated to this purpose and no other account.  However, due to a recent change in policy, we must also change the password on this account on a regular basis (annual).  My question is, which, if it is, a will this affect on our Oracle RAC database facilities?

  If we simply change the password at the domain level, rather than to check the "must change password at next login", is this cause problems with our data?

  My inclination is no, we have no problems, because current services 'running' Oracle use the local NETWORK SERVICE account that will not be changed, but confirmation of this would be appreciated.

  Environment:

  Operating system: Windows Server 2008 R2 SP2

  Oracle: 11.2.0.2 and 10.2.0.4

  GRID: 11.2.0.2

  Thank you

  Jason has.

  Change password of OS isn't a problem for Oracle DB.

• ORA-04031 Oracle RAC ASM 11.2.0.3

  Hello:

  I need your help.

  When the automatic increase in memory of comics, more than 8 GB, my BD RAC indicates failure.

  Environment:

  Oracle RAC 11.2.0.3 with 2 nodes.

  O.S.: SunOS 5.11 rac1 11.1 sun4v sparc sun4v

  RAM: 32 GB.

  Oracle Grid Infrastructure 11.2.0.3

  Oracle ASM 11.2.0.3

  Oracle Database 11.2.0.3 Enterprise Edition with RAC option.

  Symptom:

  I created my DB CARS with MEMORY_TARGET = 1 G.

  I have been to increase the parameter up to 8 GB without problem, but the 9 GB, this error occurs:

  * .memory_max_target = 9g

  * .memory_target = 4g

  SQL > startup nomount;

  ORACLE instance started.

  ORA-00604: an error has occurred at the SQL level recursive 2

  ORA-04031: unable to allocate 32 bytes of shared memory ('shared

  pool"," X$ KSMSD "," KGLS ^ c51f85ea ',' kglHeapInitialize:temp') "

  Background:

  What are the parameters of the kernel for the oracle account:

  Oracle@RAC1:~$ prctl - n Project.Max - shm-memory - i project user.oracle

  project: 100: user.oracle

  NAME PRIVILEGE VALUE FLAG ACTION BENEFICIARY

  Project.Max - shm-memory

  the 20,00 GB privilege - deny-

  system 16.0EB max deny-

  Oracle@RAC1:~$ prctl - n Project.Max - sem - IDS - i project user.oracle

  project: 100: user.oracle

  NAME PRIVILEGE VALUE FLAG ACTION BENEFICIARY

  Project.Max - sem - IDS

  privileged 16.0 M - deny -.

  system of 16.8 M max deny-

  How can I fix?

  Thank you

  David

  Your paging file must be at least as big as your physical ram, or in your case specific at least 9 GB or larger.  The value of your swap 32 GB if you plan to use the AMM but I wouldn't use it AMM because Oracle does not support on Solaris.  Supported only for the ASM instance and not the databases.

• Oracle RAC 11 g fencing

  Hi all, I want to know if anyone knows the process of closing on the CARS, the other question is, Oracle RAC is able to restart the nodes (physical servers)?

  Thank you very much.

  Pablo

  The Oracle Clusterware is designed to perform a node eviction by removing one or more nodes in the cluster if a critical problem is detected.  A critical problem could be a node does not not by a heartbeat of network, a node does not by a heartbeat of disc, a machine hooked or severely degraded, deprivation of resources OS (IE high use of the processor, memory shortage/Swapping, queue/executed load medium high) or an ocssd.bin process hanging.

  For example,.

  Oracle Clusterware is based on the files of voting accessibility. If a node in the cluster cannot access the majority of the files of voting, the node (s) to which it applies is (are)

  immediately removed from the cluster (expelled / closed).

  This expulsion of node is intended to maintain the overall health of the cluster by removing members wrong (in other words, in order to avoid "split brain" situations, as well as data corruption).

  Note: From 11.2.0.2 RAC (or if you're on Exadata), expulsion of node may not actually reboot the machine.  It's what we call a restart without rebooting.  In this case, we reboot most of the clusterware battery to see if that solves the unhealthy node.

  For more information on 11 g RAC 2: REBOOT - LESS NŒUD FENCING, refer to the following URL:

  URL: http://oracleinaction.com/11g-r2-rac-reboot-less-node-fencing/

• The names of parameters Oracle RAC &amp; description...

  Hi all

  I need to list all the important parameters of oracle, which can play a vital role in Oracle RAC put up.

  Also the parameters associated with the level of the BONE. Just need to name and function of these parameters.

  I Googled it a lot and also tried to find in OTN, could not . Ask for help here...

  Redirect kindly me some good links would be appreciated.

  Thank you very much

  All the parameters are listed in Oracle® database reference 11g Release 2.

  Who is important to the CAR? This depends on a host of factors - unique to the type of h/w installed, used interconnection, layer of fabric of I/O, etc.

• Oracle RAC with MRS 5.1

  Hi, good day to you all...

  Did anyone here ever has implemented or tested Oracle RAC protected with Vmware SRM?

  VMware SRM 5.1 does support Oracle RAC?

  AFAIK, the VMs CARS they shared virtual disk to another RAC VMs. in my VMs RAC Setup - B had 7 virtual disk mapped to RAC - A VMs and everything works very well in a production environment, and they intend to protect this RAC VMs with VMware SRM 5.1. We use replication Array with EMC RecoverPoint as SRA.

  When I try to test failover my protection group which is containing these two VMs, VMS in RAC - B not able to start with the following error

  

  The virtual disk mapping prevented virtual machines to start upward, and there is no snapshot of the CAR - A or B - CARS.

  Can I modify the virtual machine starts action of the stimulus package, im setting of the RAC - B to not power on the recovering site. map manually the virtual disk after the failover of the trial and the RAC - B still cannot start the system.

  Please give me some lights, how to map the virtual disk after failover to the recovering site.

  Thanks before

  Rgds

  Dika

  Good find!

  CTK files are created by ESX when CBT (changed block Tracking) is enabled. CBT is used by the backup software and is not supported with disks using shared bus.

  So it can certainly cause problems. Do you have a backup solution for virtual machines?

  CBT can be turned off (requires a virtual machine downtime):

  http://KB.VMware.com/kb/1031873

  Michael.