multi-host ZFS
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From: cjt on 19 Jan 2010 20:42 Is it possible to aggregate disks on multiple hosts in ZFS, or do all the disks in a pool have to be on a single machine?
From: Ian Collins on 20 Jan 2010 01:10 cjt wrote: > Is it possible to aggregate disks on multiple hosts in ZFS, or do all > the disks in a pool have to be on a single machine? How do you propose exporting them form each host? You can export iSCSI volumes and aggregate those. -- Ian Collins
From: cindy on 20 Jan 2010 10:58 On Jan 19, 11:10 pm, Ian Collins <ian-n...(a)hotmail.com> wrote: > cjt wrote: > > Is it possible to aggregate disks on multiple hosts in ZFS, or do all > > the disks in a pool have to be on a single machine? > > How do you propose exporting them form each host? > > You can export iSCSI volumes and aggregate those. > > -- > Ian Collins Keep in mind too that ZFS is not a cluster file system so it cannot be accessed concurrently from different hosts. Cindy
From: Richard B. Gilbert on 20 Jan 2010 11:23 cindy wrote: > On Jan 19, 11:10 pm, Ian Collins <ian-n...(a)hotmail.com> wrote: >> cjt wrote: >>> Is it possible to aggregate disks on multiple hosts in ZFS, or do all >>> the disks in a pool have to be on a single machine? >> How do you propose exporting them form each host? >> >> You can export iSCSI volumes and aggregate those. >> >> -- >> Ian Collins > > Keep in mind too that ZFS is not a cluster file system so it cannot > be accessed concurrently from different hosts. > > Cindy Does the O/S block such attempts? Or do you just say "that way lies disaster!"??
From: cindy on 20 Jan 2010 11:55
On Jan 20, 9:23 am, "Richard B. Gilbert" <rgilber...(a)comcast.net> wrote: > cindy wrote: > > On Jan 19, 11:10 pm, Ian Collins <ian-n...(a)hotmail.com> wrote: > >> cjt wrote: > >>> Is it possible to aggregate disks on multiple hosts in ZFS, or do all > >>> the disks in a pool have to be on a single machine? > >> How do you propose exporting them form each host? > > >> You can export iSCSI volumes and aggregate those. > > >> -- > >> Ian Collins > > > Keep in mind too that ZFS is not a cluster file system so it cannot > > be accessed concurrently from different hosts. > > > Cindy > > Does the O/S block such attempts? Or do you just say "that way lies > disaster!"?? If you access data from the same pool concurrently from different systems, then data corruption can result. NFS access is fully supported and works as expected. If you attempt to import a pool from one system to another system, zpool import will warn you as described in this blog: http://blogs.sun.com/erickustarz/entry/poor_man_s_cluster_end ZFS is supported in the SunCluster 3.2 product with live failover between systems, so that pools between systems are imported automatically. Cindy |