Hi David, I suppose it is this part https://github.com/ceph-dovecot/dovecot-ceph-plugin/tree/master/src/storage-rbox -----Original Message----- To: ceph-users@xxxxxxx; Subject: Re: ceph rbox test on passive compressed pool 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 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
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