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Re: Problem with large files

From: listman <listman_at_burble.net>
Date: 2006-08-29 18:00:05 CEST

sorry, ignore my previous email. you'd pretty much answered that
question in your email below.

i'd really like to see svn capable of running in a "fast mode". this
would have the vdelta disabled and the MD5 checksums minimized.
anybody else agree? can we have a --fast mode added to the 1.5 list
of improvements?


On Aug 29, 2006, at 5:48 AM, Daniel Berlin wrote:

> On 8/29/06, listman <listman@burble.net> wrote:
>> so vdelta and md5 are the culprits?
>> anything we can do in the short to improve this?
> Try the patch i sent, which disables vdelta.
> Also, you could disable checksum verification on every single read
> from the repository, and add it to svnadmin verify, if you wanted. I
> do this on gcc.gnu.org, trading immediate repo corruption detection
> for speed.
> (Why APR chose to reimplement MD5 instead of just taking advantage of
> OpenSSL, which is *installed* pretty much everywhere, and compilable
> everywhere else, and provides highly optimized versions, who knows)
> You will probably find vast resistance to disabling the repo read
> checksumming, but without doing that, you've pretty much lost the war
> for speed.
> This is true *even though* the client will detect the corruption
> anyway, because it is going to checksum it too and compare it to the
> repo checksum
> This is why you see multiple checksums happening.

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Received on Tue Aug 29 18:24:49 2006

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