Hi,cephers we only using krbd in ceph.and it works well near two yeas.but now I face a size problem. I have 7 nodes with 10 3T osd each.we using ceph 0.67.9 in ubuntu12.04.I know it is too old,but update is beyond my control. and now we use 80% size,so we start to delete historic unneeded data,but free size do not increase. and then I found total assigned size of rbds are much bigger than ceph size,so it means if we do not do something,it will reach the limit. but the true data in the user side,we only use 40%. I read the blog of Sebastien and some maillist.I know the command of fstrim in kernel 3.18 can deal with it. and is it risky that update kernel to 3.18 in ubuntu12.04? I try to add discard option in mount command,but it do not work. so what way do you recommend to free krbd size in ceph 0.67.9 in ubuntu12.04 Thanks so much. _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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