> -----Original Message----- > From: Gregory Farnum [mailto:greg@xxxxxxxxxxx] > Sent: Thursday, April 23, 2015 12:37 PM > To: Deneau, Tom > Cc: ceph-devel > Subject: Re: ceph tell osd bench > > On Thu, Apr 23, 2015 at 6:58 AM, Deneau, Tom <tom.deneau@xxxxxxx> wrote: > > While running ceph tell osd bench and playing around with the total_bytes > and block_size parameters, > > I have noticed that if the total_bytes written is less than about 0.5G, the > bytes/sec is much higher. > > Why is that? > > It's probably only writing the data into the journal at that size. I'm > a bit surprised because I thought the osd bench took care to only > provide stable numbers, but maybe it's just using well-chosen defaults > and at half a gig you're running well below them. > -Greg so is an osd write (as used by tell osd bench) considered complete when it is written to the journal? -- Tom ��.n��������+%������w��{.n����z��u���ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
