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Re: Would nobody please finish what he's doing.

From: Stefan Monnier
Subject: Re: Would nobody please finish what he's doing.
Date: Tue, 19 Jun 2007 13:00:21 -0400
User-agent: Gnus/5.11 (Gnus v5.11) Emacs/22.1.50 (gnu/linux)

> Every CVS operation needs a lock, if only to make sure that nobody is
> modifying the meta data while you are reading it.  *Note (cvs)Locks::.
> *Note (cvs)Concurrency::.

There's theory and then there's practice.
As mentioned, without a read lock, anonymous checkout risk getting slightly
inconsistent data, but IIRC the possible inconsistency is very minor (and
transient: fixed by the next "cvs update").

The CVS-level (i.e. module-level) metadata is basically inexistent, so the
main issue is the RCS-level (i.e. file-level) metadata: this is updated
pretty much atomically (by writing the new RCS data into a new file and
then moving it into place).

Many CVS repositories have used such unlocked anonymous access with
good results.


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