> On 14 Sep 2016, at 23:07, Gregory Farnum <gfarnum@xxxxxxxxxx> wrote: > > On Wed, Sep 14, 2016 at 7:19 AM, Dan Van Der Ster > <daniel.vanderster@xxxxxxx> wrote: >> Indeed, seems to be trimmed by osd_target_transaction_size (default 30) per new osdmap. >> Thanks a lot for your help! > > IIRC we had an entire separate issue before adding that field, where > cleaning up from bad situations like that would result in the OSD > killing itself as removing 2k maps exceeded the heartbeat timeouts. ;) > Thus the limit. Thanks Greg. FTR, I did some experimenting and found that setting osd_target_transaction_size = 1000 is a very bad idea (tried on one osd... FileStore merging of the meta subdirs lead to a slow/down osd). But setting it to ~60 was OK. I cleaned up 90TB of old osdmaps today, generating new maps in a loop by doing: watch -n10 ceph osd pool set data min_size 2 Anything more aggressive than that was disruptive on our cluster. Cheers, Dan _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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