Re: [ceph-users] CephFS: slow writes over NFS when fs is mounted with kernel driver but fast with Fuse

On Fri, Jun 3, 2016 at 10:43 PM, Jan Schermer wrote: > I'd be worried about it getting "fast" all of sudden. Test crash > consistency. > If you test something like file creation you should be able to estimate if > it should be that fast. (So it should be some fraction of

Re: [ceph-users] CephFS: slow writes over NFS when fs is mounted with kernel driver but fast with Fuse

It should be noted that using "async" with NFS _will_ corrupt your data if anything happens. It's ok-ish for something like an image library, but it's most certainly not OK for VM drives, databases, or if you write any kind of binary blobs that you can't recreate. If ceph-fuse is fast (you

Re: [ceph-users] CephFS: slow writes over NFS when fs is mounted with kernel driver but fast with Fuse

On Mon, May 30, 2016 at 10:29 PM, David wrote: > Hi All > > I'm having an issue with slow writes over NFS (v3) when cephfs is mounted > with the kernel driver. Writing a single 4K file from the NFS client is > taking 3 - 4 seconds, however a 4K write (with sync) into the

Re: [ceph-users] CephFS: slow writes over NFS when fs is mounted with kernel driver but fast with Fuse

On Mon, May 30, 2016 at 10:29 PM, David wrote: > Hi All > > I'm having an issue with slow writes over NFS (v3) when cephfs is mounted > with the kernel driver. Writing a single 4K file from the NFS client is > taking 3 - 4 seconds, however a 4K write (with sync) into the

[ceph-users] CephFS: slow writes over NFS when fs is mounted with kernel driver but fast with Fuse

Hi All I'm having an issue with slow writes over NFS (v3) when cephfs is mounted with the kernel driver. Writing a single 4K file from the NFS client is taking 3 - 4 seconds, however a 4K write (with sync) into the same folder on the server is fast as you would expect. When mounted with