Re: [zfs-discuss] Two-level ZFS

2009-02-02 Thread Fajar A. Nugraha
On Mon, Feb 2, 2009 at 9:22 PM, Gary Mills mi...@cc.umanitoba.ca wrote: On Sun, Feb 01, 2009 at 11:44:14PM -0500, Jim Dunham wrote: If there are two (or more) instances of ZFS in the end-to-end data path, each instance is responsible for its own redundancy and error recovery. There is no

Re: [zfs-discuss] Two-level ZFS

2009-02-02 Thread Gary Mills
On Mon, Feb 02, 2009 at 09:53:15PM +0700, Fajar A. Nugraha wrote: On Mon, Feb 2, 2009 at 9:22 PM, Gary Mills mi...@cc.umanitoba.ca wrote: On Sun, Feb 01, 2009 at 11:44:14PM -0500, Jim Dunham wrote: If there are two (or more) instances of ZFS in the end-to-end data path, each instance is

Re: [zfs-discuss] Two-level ZFS

2009-02-02 Thread Gary Mills
On Sun, Feb 01, 2009 at 11:44:14PM -0500, Jim Dunham wrote: I wrote: I realize that this configuration is not supported. The configuration is supported, but not in the manner mentioned below. If there are two (or more) instances of ZFS in the end-to-end data path, each instance is

Re: [zfs-discuss] Two-level ZFS

2009-02-02 Thread Nicolas Williams
On Mon, Feb 02, 2009 at 08:22:13AM -0600, Gary Mills wrote: On Sun, Feb 01, 2009 at 11:44:14PM -0500, Jim Dunham wrote: I wrote: I realize that this configuration is not supported. The configuration is supported, but not in the manner mentioned below. If there are two (or more)

[zfs-discuss] Two-level ZFS

2009-02-01 Thread Gary Mills
I realize that this configuration is not supported. What's required to make it work? Consider a file server running ZFS that exports a volume with Iscsi. Consider also an application server that imports the LUN with Iscsi and runs a ZFS filesystem on that LUN. All of the redundancy and disk

Re: [zfs-discuss] Two-level ZFS

2009-02-01 Thread Nicolas Williams
On Sun, Feb 01, 2009 at 04:26:13PM -0600, Gary Mills wrote: I realize that this configuration is not supported. What's required It would be silly for ZFS to support zvols as iSCSI LUNs and then say you can put anything but ZFS on them. I'm pretty sure there's no such restriction. (That said,

Re: [zfs-discuss] Two-level ZFS

2009-02-01 Thread Jim Dunham
Gary, I realize that this configuration is not supported. The configuration is supported, but not in the manner mentioned below. If there are two (or more) instances of ZFS in the end-to-end data path, each instance is responsible for its own redundancy and error recovery. There is no