The hints have to be given from the client side as far as I understand, can you share the client code too? Also,not seems that there's no guarantees that it will actually do anything (best effort I guess): https://docs.ceph.com/docs/mimic/rados/api/librados/#c.rados_set_alloc_hint Cheers On 6 September 2020 15:59:01 BST, Marc Roos <M.Roos@xxxxxxxxxxxxxxxxx> wrote: > > >I have been inserting 10790 exactly the same 64kb text message to a >passive compressing enabled pool. I am still counting, but it looks >like >only half the objects are compressed. > >mail/b08c3218dbf1545ff430000052412a8e mtime 2020-09-06 16:27:39.000000, > >size 63580 >mail/00f6043775f1545ff430000052412a8e mtime 2020-09-06 16:25:57.000000, > >size 525 >mail/b875f40571f1545ff430000052412a8e mtime 2020-09-06 16:25:53.000000, > >size 63580 >mail/e87c120b19f1545ff430000052412a8e mtime 2020-09-06 16:24:25.000000, > >size 525 > >I am not sure if this should be expected from passive, these docs[1] >hint that passive 'compress if hinted COMPRESSIBLE'. From that I would >conclude that all text messages should be compressed. >A previous test with a 64kb gzip attachment seemed to not compress, >although I did not look at all object sizes. > > > >on 14.2.11 > >[1] >https://documentation.suse.com/ses/5.5/html/ses-all/ceph-pools.html#sec-ceph-pool-compression >https://docs.ceph.com/docs/mimic/rados/operations/pools/ > > >_______________________________________________ >ceph-users mailing list -- ceph-users@xxxxxxx >To unsubscribe send an email to ceph-users-leave@xxxxxxx -- Sent from my Android device with K-9 Mail. Please excuse my brevity. _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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