Re: [ceph-users] os recommendations

2013-11-27 Thread Christoph Hellwig
On Tue, Nov 26, 2013 at 06:50:33AM -0800, Sage Weil wrote: > If syncfs(2) is not present, we have to use sync(2). That means you have > N daemons calling sync(2) to force a commit on a single fs, but all other > mounted fs's are also synced... which means N times the sync(2) calls. > > Fortunat

Re: [ceph-users] os recommendations

2013-11-26 Thread Dominik Mostowiec
Thanks. -- Regards Dominik 2013/11/26 Sage Weil : > On Tue, 26 Nov 2013, Christoph Hellwig wrote: >> On Tue, Nov 26, 2013 at 11:43:07AM +0100, Dominik Mostowiec wrote: >> > Hi, >> > I found in doc: http://ceph.com/docs/master/start/os-recommendations/ >> > "Putting multiple ceph-osd daemons using

Re: [ceph-users] os recommendations

2013-11-26 Thread Sage Weil
On Tue, 26 Nov 2013, Christoph Hellwig wrote: > On Tue, Nov 26, 2013 at 11:43:07AM +0100, Dominik Mostowiec wrote: > > Hi, > > I found in doc: http://ceph.com/docs/master/start/os-recommendations/ > > "Putting multiple ceph-osd daemons using XFS or ext4 on the same host > > will not perform as well

Re: [ceph-users] os recommendations

2013-11-26 Thread Christoph Hellwig
On Tue, Nov 26, 2013 at 11:43:07AM +0100, Dominik Mostowiec wrote: > Hi, > I found in doc: http://ceph.com/docs/master/start/os-recommendations/ > "Putting multiple ceph-osd daemons using XFS or ext4 on the same host > will not perform as well as they could." > > For now recommended filesystem is

Re: [ceph-users] os recommendations

2013-11-26 Thread Dominik Mostowiec
Ok, Thanks :-) -- Regards Dominik 2013/11/26 Jens Kristian Søgaard : > Hi, > > >> "Putting multiple ceph-osd daemons using XFS or ext4 on the same host >> will not perform as well as they could." > > >> This means that for the best performance setup should be 1 OSD per host? > > > The note only a

Re: [ceph-users] os recommendations

2013-11-26 Thread Jens Kristian Søgaard
Hi, "Putting multiple ceph-osd daemons using XFS or ext4 on the same host will not perform as well as they could." This means that for the best performance setup should be 1 OSD per host? The note only applies to the setups marked with "3". I.e. if you're running the latest Ceph version, t

[ceph-users] os recommendations

2013-11-26 Thread Dominik Mostowiec
Hi, I found in doc: http://ceph.com/docs/master/start/os-recommendations/ "Putting multiple ceph-osd daemons using XFS or ext4 on the same host will not perform as well as they could." For now recommended filesystem is XFS. This means that for the best performance setup should be 1 OSD per host?