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Re: node-origins and old servers

From: David Glasser <glasser_at_davidglasser.net>
Date: 2007-11-19 17:25:20 CET

On Nov 19, 2007 11:22 AM, C. Michael Pilato <cmpilato@collab.net> wrote:
> David Glasser wrote:
> > cmpilato:
> >
> > So you added this "get node origins" FS API, which is pretty slow
> > without the cache we've added.
> >
> > Which RA APIs end up calling it? Which commands thus end up with a
> > big slowdown on pre-1.5 servers?
>
> Today, the only APIs that call it are svn_repos_node_location_segments() and
> the svn_ra_get_location_segments wrapper thereof.
>
> The performance situation goes like so for the use of this API.
>
> Old clients -- well, they don't call the API at all.
>
> New clients talking to pre-1.5 servers -- these guys have to use the RA
> fallback code, based on 'svn log', which is so very not fast.
>
> New clients, talking to 1.5 servers -- if the index has a hit for the
> request, this is super fast. Otherwise, we do the slower crawl. But
> the server-side crawl in this case is much faster than the server-side
> crawl in the pre-1.5 server fallback code case, *and* the network
> response is miniscule and precise instead of humongous and requiring
> lots of client-side path-math.

Thanks for the info. Which client-level commands call the new RA API
(both in the status quo and in your future plans, since I think
there's a difference)?

--dave

-- 
David Glasser | glasser_at_davidglasser.net | http://www.davidglasser.net/
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Received on Mon Nov 19 17:25:32 2007

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