Moving disc with right to vote in another diskgroup as root
Hello
I moved the drive to vote in an another ASM diskgroup as ROOT user. After a few hours, one of the node has rebooted. After reading some documents, I see that we need to start with the user of network (we don't have any network user), in some forums, they used the ROOT user.
Could someone please confirm any problems moving the drive to vote with the ROOT user?
Thank you
Riadh
> I used 'crsctl replace votedisk + newDG' to move. Please confirm by using the root is very good. Normal redundancy with 3 discs each 2G.
That's all is correct (groups 3, 3 disks of voting in the new DG)
Hemant K Collette
Tags: Database
Similar Questions
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Hello
How is it possible that the RAC cluster nodes will see only some of the records of voting in the cluster?
I ask because I fell on the topic on Oracle docs: http://docs.oracle.com/cd/E11882_01/rac.112/e17264/adminoc.htm#TDPRC570
If this sutuation is possible, is this normal? How will this affect my cluster?
Kind regards
Igor.Hello Igor
1. some nodes in a cluster accesses not all discs with right to vote in the cluster?
Laughing out loud...
nodes in a cluster must need access to at least former numbers voting disk 1 or 3 etc...without voting disk access to the nodes become unhealthy means network and disk heartbeats are not in this case this node restarts.
2. If the above situation is possible, is this normal and how it affects the cluster?
Not possible...
It is not a normal situationpurpose of the voting disk is used to communicate the disk heartbeat and heat network between cluster nodes so without access to voting disk how cluster remain in good health so that nodes must at least
odd numbers of voting drive.3. (new question) don't exit command "crsctl query css votedisk" discs with right to vote the current node can have access, or is that the command returns a global information?
The crsctl query css votedisk command to view the voting disks used by Services synchronization Cluster, the State of the disks with voting rights and the location of the discs, if they are stored on Oracle ASM or elsewhere.
Concerning
HitgonPublished by: hitgon on April 23, 2012 20:47
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Recommendation of disc with right to vote for 11.2.0.3
Version of the grid: 11.2.0.3
Platform: Oracle Enterprise Linux 5.8
We want to keep our record of voting in the ASM disk group. Since this RAC cluster is going to host a very critical database, we want to make sure the voting disk worth more 'protected' against disk failure.
All our LUNS are allocated from a Hitachi Frame high-end storage (Hitachi VSP). No mutiple storage arrays. I think it is the case of most of the RAC implementations worldwide. I could be wrong.
So, I guess I can't speciy Normal redundancy or high because there is only one group of failure.
I have 4 questions.
1. given the situation described above (all LUN storage even frame) how much Lun should be there in my group of disk OCR_VOTE?
2. what redundancy shoud set up for diskgroup OCR_VOTE? Normal, High or external?
3. is there an advantage to having an odd number of LUNS (3) for the Group of OCR_VOTE disks in my case?
4. it is good to have separate diskgroup to voting disk and OCR?
So, I guess I can't speciy Normal redundancy or high because there is only one group of failure.
I have 4 questions.
1. given the situation described above (all LUN storage even frame) how much Lun should be there in my group of disk OCR_VOTE?
Is recommended to create 3 small LUN (one in each storage array if you have that option) and you can create a failgroup to each LUN. (the pattern is multiplex record voting to protect against the problem of corruption or array logical and physical)
Most of the EPS have MPIO and configured RAID then on hardware redundancy (disk or controller of average breakdown) is resolved at the level to support him, but you can protect the voting disk or rock against failures table.
2. what redundancy shoud set up for diskgroup OCR_VOTE? Normal, High or external?
External if you make sure that your material is highly protect against failures, RAID and MPIO is configured. But you'll be not protected against failures of corruption or logical or physical table.
Normal , you protect against physical or logical and is corruption the location recommended a lun in a different table on the storage.
Obligation to use normal redundancy if you use two or more storage system.
High if your cluster has more than 5 knots, and have two or more storage system is recommended use high rendundacy.
3. is there an advantage to having an odd number of LUNS (3) for the Group of OCR_VOTE disks in my case?
To set the record of voting on a normal GM with redudancy, you will need at least 3 LUNS as disk to vote on a Normal redudancy requires asmdisk 3 or more.
3 LUN is not a Diskgroup requirement but a requirement of CSS.
4. it is good to have separate diskgroup to voting disk and OCR?
The only reason to separate (if you RAID and MPIO level H/W), is to protect OCR against failure on Diskgroup.
If you have a Diskgroup (OCR_VOTE) set up correctly, then this will protect OCR in another Diskgroup is a plus.
p.s vote disc can be placed in a diskgroup. OCR can be placed in several diskgroup.
Recently, I faced a lost customer 12 disks (failure) at the same time in a DS8000 storage, storage over 100 physical disks.
We considered impossible, but it may something.
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Discs with voting rights are not visible in 11 GR 2 under ASM
Hi all
I had built a 11.2.0.3 new CAR configuration at 2 knots.
When I run crsctl query css votedisk - here is the list of discs with right to vote, but when I go to the spot using asmcmd, I am not able to see them.
Is there a particular reason for it / problem with my installation.
Thank you.Hello Sandeep
sandeep_dba wrote:
Is there a particular reason behind hide the file with the right to vote in ASM disk groups?hide? It is a strong word. Don't forget that asmcmd require an ASM instance to be operational. asmcmd is a convenience tool.
Disks with voting rights are accessible even before that ASM is available, as CSS is started before ASM by profile of negotiators. Thus, discs with voting rights are stored in a specific location in the ASM disk itself header area. Fritz blogged about this: http://fritshoogland.wordpress.com/2010/03/03/where-is-the-voting-disk-in-asm/
See you soon
Dominique caly
Blog: http://orainternals.wordpress.com/
Oracle ACE Director and OakTable Member http://www.oaktable.net
Fall 2012: [seminar advanced RAC | http://www.orainternals.com/services/training/advanced-rac-training/] -
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Good luck!
Lorien - MCSA/MCSE/network + / has + - if this post solves your problem, please click the 'Mark as answer' or 'Useful' button at the top of this message. Marking a post as answer, or relatively useful, you help others find the answer more quickly.
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