Re: [zfs-discuss] zpool import is this safe to use -f option in this case ?

2010-11-18 Thread Richard Elling
On Nov 17, 2010, at 3:06 AM, sridhar surampudi wrote: Hi, My understanding is ZFS itself is a great file system by combining fs/vm with the numerous feature added to it. In the similar lines existing fs/vm and array snapshot are still in use and customers is requesting similar kind of

Re: [zfs-discuss] zpool import is this safe to use -f option in this case ?

2010-11-17 Thread Phil Harman
+1 When I did my stuff (with a major bank) two years ago, my reasoning was that we (Sun, remember them?) had made huge capital out of the always consistent on disk claim, and that we could be expected to stand by and honour that promise. But because this was a big bank, I felt that due

Re: [zfs-discuss] zpool import is this safe to use -f option in this case ?

2010-11-17 Thread Tim Cook
On Wed, Nov 17, 2010 at 2:56 PM, Jim Dunham james.dun...@oracle.com wrote: Tim, On Wed, Nov 17, 2010 at 10:12 AM, Jim Dunham james.dun...@oracle.comwrote: sridhar, I have done the following (which is required for my case) Created a zpool (smpool) on a device/LUN from an array (IBM

Re: [zfs-discuss] zpool import is this safe to use -f option in this case ?

2010-11-17 Thread sridhar surampudi
Hi, My understanding is ZFS itself is a great file system by combining fs/vm with the numerous feature added to it. In the similar lines existing fs/vm and array snapshot are still in use and customers is requesting similar kind of support for zfs. So it would be very great help of getting

Re: [zfs-discuss] zpool import is this safe to use -f option in this case ?

2010-11-17 Thread David Magda
On Tue, November 16, 2010 22:56, Jim Dunham wrote: Although ZFS is always on disk consistent, many applications are not filesystem consistent. To be filesystem consistent, an application by design must issue careful writes and/or synchronized filesystem operations. Not knowing this fact, or

[zfs-discuss] zpool import is this safe to use -f option in this case ?

2010-11-16 Thread sridhar surampudi
Hi, I have done the following (which is required for my case) Created a zpool (smpool) on a device/LUN from an array (IBM 6K) on host1 created a array level snapshot of the device using dscli to another device which is successful. Now I make the snapshot device visible to another host (host2)

Re: [zfs-discuss] zpool import is this safe to use -f option in this case ?

2010-11-16 Thread Jim Dunham
sridhar, I have done the following (which is required for my case) Created a zpool (smpool) on a device/LUN from an array (IBM 6K) on host1 created a array level snapshot of the device using dscli to another device which is successful. Now I make the snapshot device visible to another

Re: [zfs-discuss] zpool import is this safe to use -f option in this case ?

2010-11-16 Thread Tim Cook
On Wed, Nov 17, 2010 at 10:12 AM, Jim Dunham james.dun...@oracle.comwrote: sridhar, I have done the following (which is required for my case) Created a zpool (smpool) on a device/LUN from an array (IBM 6K) on host1 created a array level snapshot of the device using dscli to another

Re: [zfs-discuss] zpool import is this safe to use -f option in this case ?

2010-11-16 Thread Jim Dunham
Tim, On Wed, Nov 17, 2010 at 10:12 AM, Jim Dunham james.dun...@oracle.com wrote: sridhar, I have done the following (which is required for my case) Created a zpool (smpool) on a device/LUN from an array (IBM 6K) on host1 created a array level snapshot of the device using dscli to