[ceph-users] 1 x raid0 or 2 x disk

2013-07-21 Thread James Harper
I have a server with 2 x 2TB disks. For performance, is it better to combine them as a single OSD backed by RAID0 or have 2 OSD's backed by a single disk? (log will be on SSD in either case). My need in performance is more IOPS than overall throughput (maybe that's a universal thing? :) Thanks

[ceph-users] rgw bucket index

2013-07-21 Thread Dominik Mostowiec
Hi, Rgw bucket index is in one file (one osd performance issues). Is there on roudmap sharding or other change to increase performance? -- Pozdrawiam Dominik ___ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-u

Re: [ceph-users] 1 x raid0 or 2 x disk

2013-07-21 Thread Wido den Hollander
Hi, On 07/21/2013 07:20 AM, James Harper wrote: I have a server with 2 x 2TB disks. For performance, is it better to combine them as a single OSD backed by RAID0 or have 2 OSD's backed by a single disk? (log will be on SSD in either case). I'd saw two disks and not raid0. Since when you are

Re: [ceph-users] storage pools ceph (bobtail) auth failure in xenserver SR creation

2013-07-21 Thread Wido den Hollander
Hi, On 07/21/2013 08:14 AM, Sébastien RICCIO wrote: Hi ! I'm currently trying to get the xenserver on centos 6.4 tech preview working against a test ceph cluster and having the same issue. Some infos: the cluster is named "ceph", the pool is named "rbd". ceph.xml: rbd ceph

Re: [ceph-users] xfs on ceph RBD resizing

2013-07-21 Thread Wido den Hollander
On 07/20/2013 11:42 PM, Wido den Hollander wrote: On 07/20/2013 05:16 PM, Sage Weil wrote: On Sat, 20 Jul 2013, Wido den Hollander wrote: On 07/20/2013 06:56 AM, Jeffrey 'jf' Lim wrote: On Fri, Jul 19, 2013 at 12:54 PM, Jeffrey 'jf' Lim wrote: hey folks, I was hoping to be able to use xfs on

Re: [ceph-users] storage pools ceph (bobtail) auth failure in xenserver SR creation

2013-07-21 Thread Sébastien RICCIO
Hi, thanks a lot for your answer. I was successfully able to create the storage pool with virsh. However it is not listed when I issue a virsh pool-list: Name State Autostart - If I try to add it again: [root@xen-blade05 ~]# virsh

Re: [ceph-users] storage pools ceph (bobtail) auth failure in xenserver SR creation

2013-07-21 Thread Sébastien RICCIO
Hi again, [root@xen-blade05 ~]# virsh pool-info rbd Name: rbd UUID: ebc61120-527e-6e0a-efdc-4522a183877e State: running Persistent: no Autostart: no Capacity: 5.28 TiB Allocation: 16.99 GiB Available: 5.24 TiB I managed to get it running. How

[ceph-users] SSD recommendations for OSD journals

2013-07-21 Thread Charles 'Boyo
Hello. I am intending to build a Ceph cluster using several Dell C6100 multi-node chassis servers. These have only 3 disk bays per node (12 x 3.5" drives across 4 nodes) so I can't afford to sacrifice a third of my capacity for SSDs. However, fitting the SSD via PCI-e seems a valid option. Un

Re: [ceph-users] 1 x raid0 or 2 x disk

2013-07-21 Thread Mikaël Cluseau
On 07/21/13 20:37, Wido den Hollander wrote: I'd saw two disks and not raid0. Since when you are doing parallel I/O both disks can be doing something completely different. Completely agree, Ceph is already doing the stripping :) ___ ceph-users mailin

Re: [ceph-users] SSD recommendations for OSD journals

2013-07-21 Thread Mikaël Cluseau
On 22/07/2013 08:03, Charles 'Boyo wrote: Counting on the kernel's cache, it appears I will be best served purchasing write-optimized SSDs? Can you share any information on the SSD you are using, is it PCIe connected? We are on a standard SAS bus so any SSD going to 500MB/s and being stable o

Re: [ceph-users] SSD recommendations for OSD journals

2013-07-21 Thread Leen Besselink
On Mon, Jul 22, 2013 at 08:45:07AM +1100, Mikaël Cluseau wrote: > On 22/07/2013 08:03, Charles 'Boyo wrote: > >Counting on the kernel's cache, it appears I will be best served > >purchasing write-optimized SSDs? > >Can you share any information on the SSD you are using, is it PCIe > >connected? >