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Re: Bug: svn-1.0.4 stops at 65536 revisions

From: Edmund Horner <chrysophylax_at_chrysophylax.cjb.net>
Date: 2004-05-28 19:11:59 CEST

Øyvind A. Holm wrote:
> But now it works again. I shut down the httpd server while installing
> new svn versions, maybe that has something to say? The checkins was done
> via file:// , I'll restart the script to see if the same thing happens
> again. It could also be a problem with just passing the magical 65536th
> revision directly.

My speculation (unsupported by much knowledge or any real evidence) is
that it's to do with skip deltas, and the amount of work needed to do
*whatever* on reaching the 65536th revision: many of the previous
revisions need to be redone to point to r65536.

In particular, from looking at the arrow diagram in
http://pasky.ji.cz/~pasky/dev/pavs/tree/delta-theory.txt, r1 depends on
*16* other revisions; perhaps some part of the deltafication mechanism
has never been tested with that many revisions at once.

I committed a small change (alternating between "0" and "1") to the same
file, 65536 times, as in Øyvind's recipe, and it went pretty smoothly (I
cheated by using svnadmin load for most of it :-) until the 65536th
revision, which took several minutes to complete and did a lot of
writing to c:\pagefile.sys (which sounded a bit odd to me). The
operation eventually completed successfully.

PS. Is there an official location of ghudson's document cited above? It
didn't look like a Subversion or ghudson URI ;-)


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Received on Fri May 28 19:12:44 2004

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