Yan, Zheng пишет:
2) I have 3 active mds now. I try, it works, keep it. Restart still
problematic.
multiple active MDS is not ready for production.
OK, so if I run 3 active now (looks good) - better to turn back to 1?
3) Yes, more caps on master VM (4.2.3 kernel mount, there are
web+mail+heartbeat cluster 2xVMs) on apache root. In this place was (no more
now) described CLONE_FS -> CLONE_VFORK deadlocks. But 4.2.3 installed just
before tests, was 4.1.8 with similar effects (but log from 4.2.3 on VM
clients).
I suspect your problem is due to some mount have too many open files.
during mds failover, mds needs to open these files, which take a long
time.
Can some kind of cache improve behaviour?
--
WBR, Dzianis Kahanovich AKA Denis Kaganovich, http://mahatma.bspu.unibel.by/
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