[svn.haxx.se] · SVN Dev · SVN Users · SVN Org · TSVN Dev · TSVN Users · Subclipse Dev · Subclipse Users · this month's index

Re: Do SVN actually uses SKIP-Delta?

From: Ben Reser <ben_at_reser.org>
Date: Thu, 11 Jun 2015 23:13:31 -0700

On 6/11/15 7:12 PM, Ruchir Arya wrote:
> Hello everybody,
> Since few days i am doing my research on SVN. I always read that SVN uses
> SKIP-Delta to store differences. My SVN is using FSFS file system. But when i
> analysed the repository for each revision, i saw that delta in current revision
> is the difference between the current revision and a previous revision. So, in
> my case, SVN is not using Skip-Deltas, it is using normal deltas. Can anyone
> explain me a valid reason for that?
> Moreover, i am running SVN 1.8.13 in Ubuntu 14.02.

The skip delta algorithm has been tweaked over the years to be more optimal
since using skip deltas towards a shorter history tends to have a negative
impact on performance. You probably want to read the file at db/fsfs.conf
under your repository. More than likely the reason you're not seeing skip
deltas is because you don't have enough history to exceed the
max-linear-deltification setting.
Received on 2015-06-12 08:14:02 CEST

This is an archived mail posted to the Subversion Dev mailing list.