> -----Original Message----- > From: Yves Martin [mailto:ymarti...@free.fr] > Sent: zaterdag 31 juli 2010 0:07 > To: John Beranek > Cc: users@subversion.apache.org > Subject: Re: Repository shrinkage on conversion 1.5 -> 1.6? > > On Wed, 2010-07-28 at 11:44 +0100, John Beranek wrote: > > > I believe we do have a lot of traditional ttb branching, plus > > additionally some copying from "common" directories to project > directories. > > > > Thanks for your quick answer, it reassures me somewhat that data hasn't > > gone missing. ;) > > Hello John, > > If interested, you can use my procedure and fsfs-reshard script to > upgrade from 1.5 to 1.6 without dump/load (really faster) > and improve performance/storage with a specific shard size tuning > (default is 1000 revisions in a pack): > http://ymartin59.free.fr/wordpress/index.php/projets/tune-subversion- > fsfs-repository/
Sharding reduces the number of files and thereby reduces the blocksize overhead. I think his huge storage requirement difference is due to the 'representation sharing', where identical files are only stored once. See http://subversion.apache.org/docs/release-notes/1.6.html#rep-sharing You can't get this size difference by just resharding. (But resharding and packing can certainly give some performance boost, depending on your server configuration) Bert
