On Tue, Aug 13, 2019 at 10:04 PM Wido den Hollander <wido@xxxxxxxx> wrote: > I just checked an RGW-only setup. 6TB drive, 58% full, 11.2GB of DB in > use. No slow db in use. random rgw-only setup here: 12TB drive, 77% full, 48GB metadata and 10GB omap for index and whatever. That's 0.5% + 0.1%. And that's a setup that's using mostly erasure coding and small-ish objects. > I've talked with many people from the community and I don't see an > agreement for the 4% rule. agreed, 4% isn't a reasonable default. I've seen setups with even 10% metadata usage, but these are weird edge cases with very small objects on NVMe-only setups (obviously without a separate DB device). Paul > > Wido > > > > > Thank you, > > > > Dominic L. Hilsbos, MBA > > Director – Information Technology > > Perform Air International Inc. > > DHilsbos@xxxxxxxxxxxxxx > > www.PerformAir.com > > > > > > > > -----Original Message----- > > From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Wido den Hollander > > Sent: Tuesday, August 13, 2019 12:51 PM > > To: ceph-users@xxxxxxxxxxxxxx > > Subject: Re: WAL/DB size > > > > > > > > On 8/13/19 5:54 PM, Hemant Sonawane wrote: > >> Hi All, > >> I have 4 6TB of HDD and 2 450GB SSD and I am going to partition each > >> disk to 220GB for rock.db. So my question is does it make sense to use > >> wal for my configuration? if yes then what could be the size of it? help > >> will be really appreciated. > > > > Yes, the WAL needs to be about 1GB in size. That should work in allmost > > all configurations. > > > > 220GB is more then you need for the DB as well. It's doesn't hurt, but > > it's not needed. For each 6TB drive you need about ~60GB of space for > > the DB. > > > > Wido > > > >> -- > >> Thanks and Regards, > >> > >> Hemant Sonawane > >> > >> > >> _______________________________________________ > >> ceph-users mailing list > >> ceph-users@xxxxxxxxxxxxxx > >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > >> > > _______________________________________________ > > ceph-users mailing list > > ceph-users@xxxxxxxxxxxxxx > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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