Re: [ceph-users] Help understanding EC object reads

2019-09-16 Thread Thomas Byrne - UKRI STFC
rnum > Sent: 09 September 2019 23:25 > To: Byrne, Thomas (STFC,RAL,SC) > Cc: ceph-users > Subject: Re: [ceph-users] Help understanding EC object reads > > On Thu, Aug 29, 2019 at 4:57 AM Thomas Byrne - UKRI STFC > wrote: > > > > Hi all, > > > > I’m investiga

Re: [ceph-users] Help understanding EC object reads

2019-09-09 Thread Gregory Farnum
On Thu, Aug 29, 2019 at 4:57 AM Thomas Byrne - UKRI STFC wrote: > > Hi all, > > I’m investigating an issue with our (non-Ceph) caching layers of our large EC > cluster. It seems to be turning users requests for whole objects into lots of > small byte range requests reaching the OSDs, but I’m not

[ceph-users] Help understanding EC object reads

2019-08-29 Thread Thomas Byrne - UKRI STFC
Hi all, I'm investigating an issue with our (non-Ceph) caching layers of our large EC cluster. It seems to be turning users requests for whole objects into lots of small byte range requests reaching the OSDs, but I'm not sure how inefficient this behaviour is in reality. My limited understandi