It is a hdd pool, all bluestore, configured with ceph-disk. Upgrades
seem not to have 'updated' bluefs, some osds report like this:
{
"/dev/sdb2": {
"osd_uuid": "xxxxxxxxxxx",
"size": 4000681103360,
"btime": "2019-01-08 13:45:59.488533",
"description": "main",
"bluefs": "1",
"ceph_fsid": "xxxxxxxxx",
"kv_backend": "rocksdb",
"magic": "ceph osd volume v026",
"mkfs_done": "yes",
"ready": "ready",
"require_osd_release": "14",
"whoami": "3"
}
}
And some like this:
{
"/dev/sdh2": {
"osd_uuid": "xxxxxxxxxxx",
"size": 3000487051264,
"btime": "2017-07-14 14:45:59.212792",
"description": "main",
"require_osd_release": "14"
}
}
-----Original Message-----
Cc: ceph-users
Subject: Re: ceph rbox test on passive compressed pool
On 09/11 09:36, Marc Roos wrote:
>
> Hi David,
>
> Just to let you know, this hint is being set, what is the reason for
> ceph of doing only half the objects? Can it be that there is some
> issue with my osd's? Like some maybe have an old fs (still using disk
> not volume)? Is this still to be expected or does ceph under pressure
> drop compressing?
>
> https://github.com/ceph-dovecot/dovecot-ceph-plugin/blob/56d6c900cc9ec
> 07dfb98ef2abac07aae466b7610/src/librmb/rados-storage-impl.cpp#L75
I was trying to look into this a bit :), can you give me more info about
the OSDs that you are using?
What filesystem are they on?
Cheers!
>
> Thanks,
> Marc
>
>
>
> -----Original Message-----
> Cc: jan.radon
> 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
>
>
> 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/
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>
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>
>
> --
> Sent from my Android device with K-9 Mail. Please excuse my brevity.
>
>
--
David Caro
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