None of these locks are busy. So they should not be the cause of the
problem.
Start with the version of ocfs2. Also, which kernel?
What does top say? Is some process spinning?
Also, what does this stresstest entail?
Stephan Hendl wrote:
Hi,
I use a cluster of 4 nodes with ocfs2 as a webserver cluster. During a stresstest it
occurs after a couple of minutes that the webserverprocesses are ideling but the system
load is extremely high (abou 150...200) where the waits are very low. After that I cannot
interrupt the webserver processes anymore and in some directories a "ls -ls"
comes not back - so it seems that the file system has a problem. Only a reset of the
server solves the problem ;-((
In the debug mode I can find the following lines as an example:
Lockres: D00000000000000000ccda0fcc1c07e Mode: Exclusive
Flags: Initialized Attached
RO Holders: 0 EX Holders: 0
Pending Action: None Pending Unlock Action: None
Requested Mode: Exclusive Blocking Mode: Invalid
Lockres: M00000000000000000ccda0fcc1c07e Mode: Exclusive
Flags: Initialized Attached
RO Holders: 0 EX Holders: 0
Pending Action: None Pending Unlock Action: None
Requested Mode: Exclusive Blocking Mode: Invalid
Lockres: D00000000000000000ccd9ffcc1c07d Mode: Exclusive
Flags: Initialized Attached
RO Holders: 0 EX Holders: 0
Pending Action: None Pending Unlock Action: None
Requested Mode: Exclusive Blocking Mode: Invalid
Lockres: M00000000000000000ccd9ffcc1c07d Mode: Exclusive
Flags: Initialized Attached
RO Holders: 0 EX Holders: 0
Pending Action: None Pending Unlock Action: None
Requested Mode: Exclusive Blocking Mode: Invalid
Could it be that two servers like to write to the same file and under heavy
load the clusterd processes cannot handle this?
Regards und thanks,
Stephan
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