Re: Killing processes

On Friday 10 November 2006 03:32, Stefan wrote:
> I read in the FAQ, that the repository can get corrupted, if the
> client-process is been killed. Remains this problem in Subversion 1.4.2
> with BerkeleyDB 4.5.20?

The repository is not corrupted but 'wedged'. It happens when a transaction is
partially written to the database. Since there are signals a program can't
ignore (at least on POSIX systems) there is nothing any software can do about
it.

> Does the repository also get corrupted, if the svnserve-process is been
> killed while no client is connected? If it gets corrupted, what is the
> right way to stop the svnserve-process?

If you have svnserve setup to be run via e.g. inetd, every client connecting
spawns a new svnserve process. If you need to take down your repository for
maintenance, you simply tell inetd not to accept any further connections and
wait until the last client connection is finished.

If you only have svnserve listening on a port, I think that even then it
closes the database between transactions so when no client is connected, the
database is in a consistent state and won't get wedged when svnserve is
killed.

> I guess - because of the transactional behaviour of the db - that the
> result is the same, when the svnserve-process is been killed while a client
> is connected, isn't it?

Again, it doesn't get corrupted. The repository is only left in an
intermediate state. Note that SVN 1.4 (I think) automatically recovers from
this wedged state, I seem to remember something in the release info.

Uli

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Received on Fri Nov 10 12:58:52 2006