--- On Fri, 9/5/08, Alberto Rial <rial AT ardan DOT es> wrote:
> From: Alberto Rial <rial AT ardan DOT es>
> Subject: Re: [Bacula-users] Mail Server Incremental Backup size of full backup
> To: bacula-users AT lists.sourceforge DOT net
> Cc: "Mark Nienberg" <gmane AT tippingmar DOT com>
> Date: Friday, September 5, 2008, 1:58 AM
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> Hemant Shah escribió:
> <blockquote
> type="cite">
> <pre>
> --- On Wed, 9/3/08, Alberto Rial <a
> rel="nofollow"
> class="moz-txt-link-rfc2396E"
> target="_blank"
> href="mailto:rial AT ardan DOT es"><rial AT ardan DOT es></a>
> wrote:
>
> </pre>
> <blockquote type="cite">
> <pre>From: Alberto Rial <a
> rel="nofollow"
> class="moz-txt-link-rfc2396E"
> target="_blank"
> href="mailto:rial AT ardan DOT es"><rial AT ardan DOT es></a>
> Subject: Re: [Bacula-users] Mail Server Incremental Backup
> size of full backup
> To: "Mark Nienberg" <a
> rel="nofollow"
> class="moz-txt-link-rfc2396E"
> target="_blank"
> href="mailto:gmane AT tippingmar DOT com"><gmane AT tippingmar DOT com></a>
> Cc: <a rel="nofollow"
> class="moz-txt-link-abbreviated"
> target="_blank"
> href="mailto:bacula-users AT lists.sourceforge DOT net">bacula-users AT
> lists.sourceforge DOT net</a>
> Date: Wednesday, September 3, 2008, 2:13 AM
> Mark Nienberg escribió:
> </pre>
> <blockquote type="cite">
> <pre>Alberto Rial wrote:
>
> </pre>
> <blockquote type="cite">
> <pre> I have a mail server running Debian
> 4.0 and
> </pre>
> </blockquote>
> </blockquote>
> <pre>bacula version
> </pre>
> <blockquote type="cite">
> <blockquote type="cite">
> <pre>2.2.8-8~bpo40+1 installed from debian
> backports.
> </pre>
> </blockquote>
> </blockquote>
> <pre>The mail server runs
> </pre>
> <blockquote type="cite">
> <blockquote type="cite">
> <pre>postfix + courier-imap and size of full
> backup
> </pre>
> </blockquote>
> </blockquote>
> <pre>it´s 108 Gb aprox.
> </pre>
> <blockquote type="cite">
> <blockquote type="cite">
> <pre> I´ve got a lot of machines on
> the network who
> </pre>
> </blockquote>
> </blockquote>
> <pre>are been backed up
> </pre>
> <blockquote type="cite">
> <blockquote type="cite">
> <pre>succesfully, but the mail server
> sometimes when
> </pre>
> </blockquote>
> </blockquote>
> <pre>run a incremental
> </pre>
> <blockquote type="cite">
> <blockquote type="cite">
> <pre>backup, it´s seems to be an
> incremental but
> </pre>
> </blockquote>
> </blockquote>
> <pre>bacula copy all data like in
> </pre>
> <blockquote type="cite">
> <blockquote type="cite">
> <pre>a full.
>
> </pre>
> </blockquote>
> <pre>If you store your mail messages in
> traditional unix
> </pre>
> </blockquote>
> <pre>mbox format then any new messages
> </pre>
> <blockquote type="cite">
> <pre>or deleted messages for one user will
> change the mbox
> </pre>
> </blockquote>
> <pre>file for that user and the
> </pre>
> <blockquote type="cite">
> <pre>backup will include all of that user's
> mail (since
> </pre>
> </blockquote>
> <pre>it is all in one file).
> </pre>
> <blockquote type="cite">
> <pre>To get true incremental backups for user
> mailboxes you
> </pre>
> </blockquote>
> <pre>would need to use one of the
> </pre>
> <blockquote type="cite">
> <pre>formats that stores messages as individual
> files, like
> </pre>
> </blockquote>
> <pre>Maildir.
> </pre>
> <blockquote type="cite">
> <pre>Is that the problem or do you already use
> Maildir
> </pre>
> </blockquote>
> <pre>format?
> </pre>
> <blockquote type="cite">
> <pre>Mark Nienberg
>
>
>
> </pre>
> </blockquote>
>
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> <pre>I´m aleady using Maildir format...
> Some of the
> incremental backups runs
> fine (about 700 Mb of daily changes) while some of them
> (generally
> sunday night incremental) has the same size that a full
> backup (about
> 108 gb). If I delete this backup (Incremental with full
> size) next
> backup size will be 108 gb, if i don´t delete it next
> backup runs fine
> (about 700 mb).
>
> Thanks.
>
>
> Alberto Rial.
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> <pre>
> It looks like some process that runs on Sunday changes
> ctime of the files. I had similar problem where my old
> backup system (Veritas NetBackup) and bacula were running
> together for few months and Veritas would change ctime of
> the file because it was resetting the atime of the file and
> bacula would back it up even though it did not change. Many
> of my incremental backups were the size of full backup.
>
>
>
>
> Hemant Shah
> E-mail: <a rel="nofollow"
> class="moz-txt-link-abbreviated"
> target="_blank"
> href="mailto:hjrrs AT yahoo DOT com">hjrrs AT yahoo DOT com</a>
>
>
>
>
> </pre>
> </blockquote>
> <br>
> Mmm I was looking if some process changed ctime of files
> but i didnt
> find anything. I The atime (access time)
> changes becouse it´s an IMAP
> e-mail server, users access their mail from their desktops
> but it´s
> stored on mail server. It´s not a procces on
> sunday, becouse it
> happens sometimes, take a look at a resume of backups of
> e-mail server:<br>
> Terminated Jobs:<br>
> JobId Level
> Files
> Bytes Status
> Finished
> Name<br>
> ======================================================================<br>
> 4187 Incr 695,641
> 107,892,462,347 OK
> 27-ago-08 07:04 mail<br>
> 4312 Incr
> 16,515 411,294,291
> OK 27-ago-08 23:20
> mail<br>
> 4421 Incr
> 17,640 410,300,655
> OK 29-ago-08 00:21
> mail<br>
> 4524 Full 698,476
> 108,204,208,184 OK
> 31-ago-08 02:34 mail<br>
> 4533 Incr 697,872
> 108,199,519,284 OK
> 31-ago-08 11:25 mail<br>
> 4542 Incr 187,939
> 13,029,677,742 OK
> 01-sep-08 00:00 mail<br>
> 4668 Incr 697,746
> 108,169,211,334 OK
> 02-sep-08 07:17 mail<br>
> 4794 Incr 698,008
> 108,197,912,954 OK
> 03-sep-08 07:25 mail<br>
> 4919 Incr
> 8,921 511,619,657
> OK 03-sep-08 23:21
> mail<br>
> 5028 Incr
> 18,304 530,161,167
> OK 04-sep-08 23:21
> mail<br>
> ====<br>
> <br>
> Sometimes works fine and sometimes not. I´m lost in
> configuration :P<br>
> <br>
> <br>
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Which IMAP server are you using?
Do google search on "IMAP ctime" (without quotes) and you will get few
hits where users are complaining about IMAP servers changing ctime.
Hemant Shah
E-mail: hjrrs AT yahoo DOT com
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