Re: UFS2 Snapshot limitiations
I seem to recall, but cannot find, the limitation on the number of snapshots allowed on UFS2. Could someone point me in the right theoretically 20 snapshots. really - a few, as system gets MUCH slower on partition with many snapshots. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
UFS2 Snapshot limitiations
Hello, I seem to recall, but cannot find, the limitation on the number of snapshots allowed on UFS2. Could someone point me in the right direction please? -- Regards, Doug ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: UFS2 Snapshot limitiations
In response to Doug Poland [EMAIL PROTECTED]: Hello, I seem to recall, but cannot find, the limitation on the number of snapshots allowed on UFS2. Could someone point me in the right direction please? The handbook has it: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/snapshots.html -- Bill Moran http://www.potentialtech.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: UFS2 Snapshot limitiations
On Tue, March 13, 2007 10:10, Bill Moran wrote: In response to Doug Poland [EMAIL PROTECTED]: Hello, I seem to recall, but cannot find, the limitation on the number of snapshots allowed on UFS2. Could someone point me in the right direction please? The handbook has it: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/snapshots.html Thank you very much. -- Regards, Doug ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: UFS2 Snapshot limitiations
On 3/13/07, Doug Poland [EMAIL PROTECTED] wrote: On Tue, March 13, 2007 10:10, Bill Moran wrote: In response to Doug Poland [EMAIL PROTECTED]: Hello, I seem to recall, but cannot find, the limitation on the number of snapshots allowed on UFS2. Could someone point me in the right direction please? The handbook has it: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/snapshots.html Thank you very much. Sorry for joining the thread, but it's raised my curiosity: what's the reason for this limit? -- Regards, Doug Thanx! -- Pietro Cerutti - ASCII Ribbon Campaign - against HTML e-mail and proprietary attachments www.asciiribbon.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: UFS2 Snapshot limitiations
In response to Pietro Cerutti [EMAIL PROTECTED]: On 3/13/07, Doug Poland [EMAIL PROTECTED] wrote: On Tue, March 13, 2007 10:10, Bill Moran wrote: In response to Doug Poland [EMAIL PROTECTED]: Hello, I seem to recall, but cannot find, the limitation on the number of snapshots allowed on UFS2. Could someone point me in the right direction please? The handbook has it: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/snapshots.html Thank you very much. Sorry for joining the thread, but it's raised my curiosity: what's the reason for this limit? I'm not 100% sure, but I believe it's because snapshot information is stored in the filesystem superblock, and that's all that can fit in the space available in the superblock. -- Bill Moran http://www.potentialtech.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: UFS2 Snapshot limitiations
On 3/13/07, Bill Moran [EMAIL PROTECTED] wrote: In response to Pietro Cerutti [EMAIL PROTECTED]: On 3/13/07, Doug Poland [EMAIL PROTECTED] wrote: On Tue, March 13, 2007 10:10, Bill Moran wrote: In response to Doug Poland [EMAIL PROTECTED]: Hello, I seem to recall, but cannot find, the limitation on the number of snapshots allowed on UFS2. Could someone point me in the right direction please? The handbook has it: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/snapshots.html Thank you very much. Sorry for joining the thread, but it's raised my curiosity: what's the reason for this limit? I'm not 100% sure, but I believe it's because snapshot information is stored in the filesystem superblock, and that's all that can fit in the space available in the superblock. This is the same thing that came to my mind, but in the handbook page I found: Active snapshots are recorded in the superblock so they are persistent across unmount and remount operations along with system reboots. 1) what an active snapshot is? 2) is that limit limited (...) to active snapshots? Tnx -- Bill Moran http://www.potentialtech.com -- Pietro Cerutti - ASCII Ribbon Campaign - against HTML e-mail and proprietary attachments www.asciiribbon.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: UFS2 Snapshot limitiations
In response to Pietro Cerutti [EMAIL PROTECTED]: On 3/13/07, Bill Moran [EMAIL PROTECTED] wrote: In response to Pietro Cerutti [EMAIL PROTECTED]: On 3/13/07, Doug Poland [EMAIL PROTECTED] wrote: On Tue, March 13, 2007 10:10, Bill Moran wrote: In response to Doug Poland [EMAIL PROTECTED]: Hello, I seem to recall, but cannot find, the limitation on the number of snapshots allowed on UFS2. Could someone point me in the right direction please? The handbook has it: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/snapshots.html Thank you very much. Sorry for joining the thread, but it's raised my curiosity: what's the reason for this limit? I'm not 100% sure, but I believe it's because snapshot information is stored in the filesystem superblock, and that's all that can fit in the space available in the superblock. This is the same thing that came to my mind, but in the handbook page I found: Active snapshots are recorded in the superblock so they are persistent across unmount and remount operations along with system reboots. 1) what an active snapshot is? I think you're trying too hard to read into this. Active snapshot, as opposed to a snapshot that has been deleted/unmounted and existed in the past, is what I took it to mean. Keep in mind that the existence of a snapshot mandates certain activity on the part of the FFS drivers in order to keep that snapshot's data valid. Thus, any snapshot is active as long as it exists. In other words, if you delete a file from the filesystem while a snapshot is active, the FFS drivers can not reclaim that space, as it would result in data loss within the snapshot. 2) is that limit limited (...) to active snapshots? Sure. I don't know what an inactive snapshot would be. -- Bill Moran http://www.potentialtech.com ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
Re: UFS2 Snapshot limitiations
On 3/13/07, Bill Moran [EMAIL PROTECTED] wrote: In response to Pietro Cerutti [EMAIL PROTECTED]: On 3/13/07, Bill Moran [EMAIL PROTECTED] wrote: In response to Pietro Cerutti [EMAIL PROTECTED]: On 3/13/07, Doug Poland [EMAIL PROTECTED] wrote: On Tue, March 13, 2007 10:10, Bill Moran wrote: In response to Doug Poland [EMAIL PROTECTED]: Hello, I seem to recall, but cannot find, the limitation on the number of snapshots allowed on UFS2. Could someone point me in the right direction please? The handbook has it: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/snapshots.html Thank you very much. Sorry for joining the thread, but it's raised my curiosity: what's the reason for this limit? I'm not 100% sure, but I believe it's because snapshot information is stored in the filesystem superblock, and that's all that can fit in the space available in the superblock. This is the same thing that came to my mind, but in the handbook page I found: Active snapshots are recorded in the superblock so they are persistent across unmount and remount operations along with system reboots. 1) what an active snapshot is? I think you're trying too hard to read into this. Active snapshot, as opposed to a snapshot that has been deleted/unmounted and existed in the past, is what I took it to mean. Makes sense. Thanks! -- Bill Moran http://www.potentialtech.com -- Pietro Cerutti - ASCII Ribbon Campaign - against HTML e-mail and proprietary attachments www.asciiribbon.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to [EMAIL PROTECTED]
