Groups > comp.databases.ms-sqlserver > #2257

Re: Make a backup only if necessary

From	Anton Shepelev <anton.txt@g{oogle}mail.com>
Newsgroups	comp.databases.ms-sqlserver
Subject	Re: Make a backup only if necessary
Date	2024-06-05 17:15 +0300
Organization	A noiseless patient Spider
Message-ID	<20240605171517.0b0e856d919630ebaf31cfb7@g{oogle}mail.com> (permalink)
References	(4 earlier) <20240529005233.d0405d2f6f826fd0e8ae0624@gmail.moc> <20240531135309.a107b0e4fc99f9659bed7d8c@g{oogle}mail.com> <XnsB18475BD5D7AYazorman@127.0.0.1> <20240602144320.325085f5f455d2f954cced20@gmail.moc> <XnsB187CF3F51482Yazorman@127.0.0.1>

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Erland Sommarskog:

> Since the log is truncated on checkpoint, the log could
> look empty.

Indeed.  I wish I knew how to track LSNs more reliably.

> Then again, if you track LSN:s you should be safe.

Do you mean your suggestion to use `RESTORE HEADERONLY'?  If
so, I have already remarked that its FirstLSN LastLSN fields
are also available from the msdb.backupset table.
Unfortunately, tracking them produces a lot of false
positives, because of all the event types, I need only those
that refer to data changes, that is:

      LOP_INSERT_ROWS, LOP_MODIFY_ROW, LOP_DELETE_ROWS

Other events should not trigger a backup.

> > I believe my situation is not unique, when there are
> > many infrequently used databases and no requirement of a
> > 15-minute backup granularity, so that keeping the simple
> > recovery model and doing a backup /only/ when data has
> > changed safes a log of resources.
>
> Log of resources, hehe. :-)

Of course, so that nothing slips by.

> Then again, following the normal routines saves quite a
> bit of human resources.

At the expense of increased boredom, and customisation.

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Make a backup only if necessary Anton Shepelev <anton.txt@g{oogle}mail.com> - 2024-05-27 12:59 +0300
  Re: Make a backup only if necessary Anton Shepelev <anton.txt@g{oogle}mail.com> - 2024-05-27 13:53 +0300
  Re: Make a backup only if necessary Erland Sommarskog <esquel@sommarskog.se> - 2024-05-27 22:43 +0200
    Re: Make a backup only if necessary Anton Shepelev <anton.txt@g{oogle}mail.com> - 2024-05-28 12:41 +0300
      Re: Make a backup only if necessary Erland Sommarskog <esquel@sommarskog.se> - 2024-05-28 20:11 +0200
        Re: Make a backup only if necessary Anton Shepelev <anton.txt@gmail.moc> - 2024-05-29 00:52 +0300
          Re: Make a backup only if necessary Anton Shepelev <anton.txt@g{oogle}mail.com> - 2024-05-31 13:53 +0300
            Re: Make a backup only if necessary Erland Sommarskog <esquel@sommarskog.se> - 2024-06-01 11:34 +0200
              Re: Make a backup only if necessary Anton Shepelev <anton.txt@gmail.moc> - 2024-06-02 14:43 +0300
                Re: Make a backup only if necessary Erland Sommarskog <esquel@sommarskog.se> - 2024-06-04 20:22 +0200
                Re: Make a backup only if necessary Anton Shepelev <anton.txt@g{oogle}mail.com> - 2024-06-05 17:15 +0300
                Re: Make a backup only if necessary Anton Shepelev <anton.txt@g{oogle}mail.com> - 2024-06-05 19:37 +0300

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