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RE: svn edit

From: Harvey, Edward <Edward.Harvey_at_patni.com>
Date: Sun, 26 Oct 2008 12:03:44 -0400

> > When you want to edit a file, you run 'svn edit file', which makes
> the
> > file read-write and registers this fact in sqlite. Then, when you
> run
>
> If I would be required to call svn [edit] I would stop using Subversion

You won't be forced to use it, it's optional, for the purpose of gaining performance. By comparison, getting status on a directory that takes 5-10 mins in svn will be nearly instant (less than 1 sec) on perforce. That's the performance gain that svn will be able to achieve by using "svn edit"

> Isn't this a problem of the filesystem if comparing file modification
> times is
> so slow? Is there really no filesystem (Reiser, ext3/4, XFS, ...) which

If you have tens of thousands of versioned files in your working copy, regardless of how fast your filesystem is, it takes a significant time to walk the tree scanning for stuff that changed. Which must be done on every "svn status" and "svn update" etc.

For my users, it takes 5-10 minutes every time they "svn status" their WC. As long as the cache is cold (and it usually is because the system is busy working on peoples' files too besides just versioning them). On a warm cache it's 20-30 sec, but there's no reasonable way to keep the cache warm.

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Received on 2008-10-26 17:04:14 CET

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