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 > > ide

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 reall

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,

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

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 &g

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 > definitio

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 d

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

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 snapsho

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 singl

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 cal

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