On 8/13/19 10:00 PM, dhils...@performair.com wrote: > Wildo / Hemant; > > Current recommendations (since at least luminous) say that a block.db device > should be at least 4% of the block device. For a 6 TB drive, this would be > 240 GB, not 60 GB.
I know and I don't agree with that. I'm not sure where that number came from either. There could be various configurations, but none of the configs I have seen require that amount of DB space. I just checked an RGW-only setup. 6TB drive, 58% full, 11.2GB of DB in use. No slow db in use. I've talked with many people from the community and I don't see an agreement for the 4% rule. Wido > > Thank you, > > Dominic L. Hilsbos, MBA > Director – Information Technology > Perform Air International Inc. > dhils...@performair.com > www.PerformAir.com > > > > -----Original Message----- > From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Wido > den Hollander > Sent: Tuesday, August 13, 2019 12:51 PM > To: email@example.com > Subject: Re: [ceph-users] 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 >> firstname.lastname@example.org >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >> > _______________________________________________ > ceph-users mailing list > email@example.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list firstname.lastname@example.org http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com