write cache disabling recommendations for journal and storage disks ?

2012-05-22 Thread Alexandre DERUMIER
Hi, I have some questions about disabling write cache http://ceph.com/docs/master/config-cluster/file-system-recommendations/ Ceph aims for data safety, which means that when the application receives notice that data was written to the disk, that data was actually written to the disk. For old

Re: write cache disabling recommendations for journal and storage disks ?

2012-05-22 Thread Sage Weil
On Tue, 22 May 2012, Alexandre DERUMIER wrote: Hi, I have some questions about disabling write cache http://ceph.com/docs/master/config-cluster/file-system-recommendations/ Ceph aims for data safety, which means that when the application receives notice that data was written to the disk,

Re: write cache disabling recommendations for journal and storage disks ?

2012-05-22 Thread Alexandre DERUMIER
disabling recommendations for journal and storage disks ? On Tue, 22 May 2012, Alexandre DERUMIER wrote: Hi, I have some questions about disabling write cache http://ceph.com/docs/master/config-cluster/file-system-recommendations/ Ceph aims for data safety, which means that when

Re: write cache disabling recommendations for journal and storage disks ?

2012-05-22 Thread Sage Weil
Cc: ceph-devel@vger.kernel.org Envoyé: Mardi 22 Mai 2012 16:41:50 Objet: Re: write cache disabling recommendations for journal and storage disks ? On Tue, 22 May 2012, Alexandre DERUMIER wrote: Hi, I have some questions about disabling write cache http://ceph.com/docs/master

Re: write cache disabling recommendations for journal and storage disks ?

2012-05-22 Thread Alexandre DERUMIER
Weil s...@inktank.com, ceph-devel@vger.kernel.org Envoyé: Mardi 22 Mai 2012 17:17:56 Objet: Re: write cache disabling recommendations for journal and storage disks ? On Tue, 22 May 2012, Alexandre DERUMIER wrote: Thanks Sage, yes newer kernel doesn't need barrier option since 2.6.37 if I