Hi cephers,

Recently I have met a problem with leveldb which is set as monitor store by 
default.


My ceph version is 0.94.5.


I have a disk format as xfs,and mount the disk to /var/lib/ceph/mon/mon.<id>, 
and the size is 100GB.


The monitor store size is increasing 1GB per hours and never seems compact and 
my monitor size has ever reached 60GB.


I stop the monitor and backup the monitor data for analysis , and the size is 
23GB.


I find that after manual compact range paxos 10000 20000(in fact , key paxos 
10000 and key paxos 20000 has already been delelted and ceph has already 
compact the range paxos 10000 to 20000) After compaction, the monitor store 
size is only 489MB.


Actually we can compact the monitor store with ceph tell mon.xxx compact 
command, but the monitor size is exploding. and too big, there must be some 
problem with levedb or using leveldb in ceph.


Has anyone has ever analysis the monitor store problem with leveldb?


Best regards,
 Brandy
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