Re: [ceph-users] librbd cache and clone awareness

2017-01-16 Thread Shawn Edwards
On Mon, Jan 16, 2017 at 10:11 AM Jason Dillaman wrote: > On Sun, Jan 15, 2017 at 2:56 PM, Shawn Edwards > wrote: > > If I, say, have 10 rbd attached to the same box using librbd, all 10 of > the > > rbd are clones of the same snapshot, and I have caching turned on, will > each > > rbd be caching

Re: [ceph-users] librbd cache and clone awareness

2017-01-16 Thread Jason Dillaman
On Sun, Jan 15, 2017 at 2:56 PM, Shawn Edwards wrote: > If I, say, have 10 rbd attached to the same box using librbd, all 10 of the > rbd are clones of the same snapshot, and I have caching turned on, will each > rbd be caching blocks from the parent snapshot individually, or will the 10 > rbd pro

[ceph-users] librbd cache and clone awareness

2017-01-15 Thread Shawn Edwards
If I, say, have 10 rbd attached to the same box using librbd, all 10 of the rbd are clones of the same snapshot, and I have caching turned on, will each rbd be caching blocks from the parent snapshot individually, or will the 10 rbd processes be building up their own cache, ignorant of the other pr

Re: [ceph-users] librbd cache

2015-01-07 Thread Stuart Longland
Hi all, apologies for the slow reply. Been flat out lately and so any cluster work has been relegated to the back-burner. I'm only just starting to get back to it now. On 06/06/14 01:00, Sage Weil wrote: > On Thu, 5 Jun 2014, Wido den Hollander wrote: >> On 06/05/2014 08:59 AM, Stuart Longland w

Re: [ceph-users] librbd cache

2014-06-05 Thread Sage Weil
On Thu, 5 Jun 2014, Wido den Hollander wrote: > On 06/05/2014 08:59 AM, Stuart Longland wrote: > > Hi all, > > > > I'm looking into other ways I can boost the performance of RBD devices > > on the cluster here and I happened to see these settings: > > > > http://ceph.com/docs/next/rbd/rbd-config-

Re: [ceph-users] librbd cache

2014-06-05 Thread Wido den Hollander
On 06/05/2014 08:59 AM, Stuart Longland wrote: Hi all, I'm looking into other ways I can boost the performance of RBD devices on the cluster here and I happened to see these settings: http://ceph.com/docs/next/rbd/rbd-config-ref/ A query, is it possible for the cache mentioned there to be page

[ceph-users] librbd cache

2014-06-05 Thread Stuart Longland
Hi all, I'm looking into other ways I can boost the performance of RBD devices on the cluster here and I happened to see these settings: http://ceph.com/docs/next/rbd/rbd-config-ref/ A query, is it possible for the cache mentioned there to be paged out to swap residing on a SSD or is it purely R