Dear Cephers,

I am running IO500 testing on CephFS 3-node cluster with version Nautilus 
14.2.22, and during the tests, we observed a lot OSD down and pgremapping, and 
looking at OSD logs, we see the followings:

How can we avoid such instability or issues? any suggestions or comments are 
highly appreciated.

Samuel

[104592.457005] libceph: osd10 192.168.10.35:6820 socket closed (con state OPEN)
[104592.628277] libceph: osd10 192.168.10.35:6820 socket closed (con state 
CONNECTING)
[104593.453087] libceph: osd10 192.168.10.35:6820 socket closed (con state 
CONNECTING)
[104593.488436] libceph: osd8 192.168.10.35:6843 socket closed (con state OPEN)
[104593.803299] libceph: osd8 192.168.10.35:6843 socket closed (con state 
CONNECTING)
[104594.413115] libceph: osd8 192.168.10.35:6843 socket closed (con state 
CONNECTING)
[104594.478092] libceph: osd10 192.168.10.35:6820 socket closed (con state 
CONNECTING)
[104595.437164] libceph: osd8 192.168.10.35:6843 socket closed (con state 
CONNECTING)
[104596.461221] libceph: osd10 192.168.10.35:6820 socket closed (con state 
CONNECTING)
[104597.421188] libceph: osd8 192.168.10.35:6843 socket closed (con state 
CONNECTING)
[104600.429246] libceph: osd10 192.168.10.35:6820 socket closed (con state 
CONNECTING)
[104601.453162] libceph: osd8 192.168.10.35:6843 socket closed (con state 
CONNECTING)
[104607.556989] libceph: osd10 down
[104608.500131] libceph: osd11 192.168.10.35:6851 socket closed (con state OPEN)
[104608.892067] libceph: osd11 192.168.10.35:6851 socket closed (con state 
CONNECTING)
[104609.309276] libceph: osd11 192.168.10.35:6851 socket closed (con state 
CONNECTING)
[104610.349239] libceph: osd11 192.168.10.35:6851 socket closed (con state 
CONNECTING)
[104612.334302] libceph: osd11 192.168.10.35:6851 socket closed (con state 
CONNECTING)
[104613.490471] libceph: osd3 192.168.10.34:6821 socket closed (con state OPEN)
[104613.661655] libceph: osd3 192.168.10.34:6821 socket closed (con state 
CONNECTING)
[104614.381240] libceph: osd3 192.168.10.34:6821 socket error on write
[104615.342232] libceph: osd3 192.168.10.34:6821 socket error on write
[104616.365433] libceph: osd11 192.168.10.35:6851 socket closed (con state 
CONNECTING)
[104617.389321] libceph: osd3 192.168.10.34:6821 socket error on write
[104621.357310] libceph: osd3 192.168.10.34:6821 socket error on write
[104624.957004] libceph: osd0 192.168.10.34:6852 socket closed (con state OPEN)
[104625.119796] libceph: osd0 192.168.10.34:6852 socket closed (con state 
CONNECTING)
[104626.349357] libceph: osd0 192.168.10.34:6852 socket error on write
[104627.373508] libceph: osd0 192.168.10.34:6852 socket error on write
[104629.357432] libceph: osd0 192.168.10.34:6852 socket error on write
[104629.421412] libceph: osd3 192.168.10.34:6821 socket error on write
[104631.458368] libceph: osd8 down
[104631.458370] libceph: osd11 down
[104631.680203] libceph: osd13 down
[104633.389445] libceph: osd0 192.168.10.34:6852 socket error on write
[104633.391371] libceph: osd0 down
[104633.391372] libceph: osd3 down
[104636.851429] libceph: osd8 up
[104636.851431] libceph: osd11 up
[104636.906442] libceph: osd10 up





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