Re: FreeBSD UFS2 snapshots, and math ... - resolved, but two more Qs

2005-10-21 Thread Lowell Gilbert
user [EMAIL PROTECTED] writes: Folks, On Thu, 20 Oct 2005, Gayn Winters wrote: Imagine that each data block is marked with labels on change. It doesn't matter how many labels there are, there will be only one data block saved. In trying to follow this thread, I started looking

Re: FreeBSD UFS2 snapshots, and math ... - resolved, but two more Qs

2005-10-21 Thread user
On 21 Oct 2005, Lowell Gilbert wrote: The snapshot doesn't know what the bits in the file are. All it knows is that the file's data used to be, say in block 1857 and now the file's data are in block 1956. The fact that both blocks are identical is not detected. If you're really

Re: FreeBSD UFS2 snapshots, and math ... - resolved, but two more Qs

2005-10-21 Thread Lowell Gilbert
user [EMAIL PROTECTED] writes: On 21 Oct 2005, Lowell Gilbert wrote: The snapshot doesn't know what the bits in the file are. All it knows is that the file's data used to be, say in block 1857 and now the file's data are in block 1956. The fact that both blocks are identical is not

Re: FreeBSD UFS2 snapshots, and math ...

2005-10-20 Thread Doug Poland
On Thu, Oct 20, 2005 at 11:01:42AM -0400, user wrote: Finally, are there any snapshot diag tools at all ? Like, something that reports snapshot sizes, percent of disk used for snapshots, and maybe even a way for me to actually calculate what the percent change for time period X is for a

Re: FreeBSD UFS2 snapshots, and math ...

2005-10-20 Thread user
Doug, On Thu, 20 Oct 2005, Doug Poland wrote: On Thu, Oct 20, 2005 at 11:01:42AM -0400, user wrote: Finally, are there any snapshot diag tools at all ? Like, something that reports snapshot sizes, percent of disk used for snapshots, and maybe even a way for me to actually calculate

Re: FreeBSD UFS2 snapshots, and math ...

2005-10-20 Thread Lowell Gilbert
user [EMAIL PROTECTED] writes: I am trying to budget some disk space for filesystems with snapshots enabled on them. The following is simplified - I am just trying to get my concepts in order: Let's say I have a filesystem, and on that filesystem I create a snapshot every single night,

Re: FreeBSD UFS2 snapshots, and math ...

2005-10-20 Thread user
Hello, On 20 Oct 2005, Lowell Gilbert wrote: user [EMAIL PROTECTED] writes: Let's say I have a filesystem, and on that filesystem I create a snapshot every single night, and every night I delete the snapshot from 5 nights ago. This means that at all times, I have four snapshots

Re: FreeBSD UFS2 snapshots, and math ...

2005-10-20 Thread Andrew P.
On 10/20/05, user [EMAIL PROTECTED] wrote: Hello, On 20 Oct 2005, Lowell Gilbert wrote: user [EMAIL PROTECTED] writes: Let's say I have a filesystem, and on that filesystem I create a snapshot every single night, and every night I delete the snapshot from 5 nights ago. This

RE: FreeBSD UFS2 snapshots, and math ...

2005-10-20 Thread Gayn Winters
-Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andrew P. Sent: Thursday, October 20, 2005 12:35 PM To: user Cc: freebsd-questions@freebsd.org Subject: Re: FreeBSD UFS2 snapshots, and math ... Imagine that each data block is marked with labels

RE: FreeBSD UFS2 snapshots, and math ... - resolved, but two more Qs

2005-10-20 Thread user
Folks, On Thu, 20 Oct 2005, Gayn Winters wrote: Imagine that each data block is marked with labels on change. It doesn't matter how many labels there are, there will be only one data block saved. In trying to follow this thread, I started looking around for a precise definition of

RE: FreeBSD UFS2 snapshots, and math ... - resolved, but two more Qs

2005-10-20 Thread Gayn Winters
-Original Message- From: user [mailto:[EMAIL PROTECTED] Sent: Thursday, October 20, 2005 1:51 PM To: Gayn Winters Cc: 'Andrew P.'; freebsd-questions@freebsd.org Subject: RE: FreeBSD UFS2 snapshots, and math ... - resolved, but two more Qs Folks, On Thu, 20 Oct 2005

Re: FreeBSD UFS2 snapshots, and math ...

2005-10-20 Thread Andrew P.
On 10/21/05, Gayn Winters [EMAIL PROTECTED] wrote: -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Andrew P. Sent: Thursday, October 20, 2005 12:35 PM To: user Cc: freebsd-questions@freebsd.org Subject: Re: FreeBSD UFS2 snapshots, and math