[Ocfs2-users] Hi

[Alexei Roudnev]

HiIt is STRONLY recommended do not use OCFSv2 for CRS and OCR files. Just create 2 partitions, 1 - 105 MB for OCRFile , and 1 - 22 MB for CSSFIle,
make them raw using raw script (check with the docs, Oracle promise to make it work without raw) and use them in CRS.

If using OCFSv2, you must use datavolume mounting option, which is not supported in all versions.

Before it all, make a sanity checks:
- on node 1
  echo 1234 > a
- on node 2
  cat a
  echo 3456 > a
- on node 1
  cat a

and be sure that it all works.

When posting here, always specify:
- Linux version
- how do you install ocfsv2 (comes with the system or added by rpm or compile yourself)
- at least, output of rpm -qa | grep ocfs

Why OCFSv2 is not good for OCR and CSS Files - in short:

- OCR and CSS Files are control files for the Oracle cluster (CRS). CRS runs heartbeat, check cluster consistency and quorum,
makes decisions to self-fence node and so on.
- OCFSv2 is cluster too. It makes the same job, independently.

When you mix 2 clusters together, it may cause insonsistent (suboptimal) decisions. In addition, make OCR and CSS Files on raw partition is pretty simple and harmless. IN addition, OCFSv2 have some instabilities and timeouts, and CRS have it's own timeouts - and this timeouts are not adjusted one to others.


  ----- Original Message ----- 
  From: Dheerendar Srivastav 
  To: Ocfs2-users at oss.oracle.com 
  Sent: Friday, May 04, 2007 11:35 PM
  Subject: [Ocfs2-users] Hi


  Hi

  We are installation of oracle RAC and install the ocfs2 but check /o2cb status is running fine but when we installation of the crs the error message show share space not found.
  Pls any body kindly provide the solution.
  Dheerendar Srivastav
  Associate vice President -IT
  Bajaj Capital Ltd.
  New Delhi 

  p FQȔB ד5Dĉb
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