inn-workers Digest V6 #124

[Andrew Clark]

On Sun, Jun 13, 2004 at 07:52:09AM +0000, INN Workers Mailing List wrote:
> inn-workers Digest	Sat, 12 Jun 2004	Volume: 06  Issue: 124
> 
> In This Issue:
> 		New compression functionality in ovdb
> 
> ----------------------------------------------------------------------
> 
> From: Heath Kehoe <hakehoe at avalon.net>
> Subject: New compression functionality in ovdb
> Date: Sat, 12 Jun 2004 14:40:07 -0500
> 
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> I've just committed to CURRENT new code that enables compression
> of overview records in ovdb.  So far, my testing has shown that
> this compression is a big win for ovdb, mostly because the average
> record size is smaller which increases the average keys-per-page
> in the BerkeleyDB Btree databases, thus improving performance
> (see http://www.sleepycat.com/docs/ref/am_conf/intro.html ).
> Only records that are longer than 600 bytes get compressed.
> 
> The change is made in a way to insure minimal disruption.
> Compression defaults to off, and must be enabled using the
> 'compress' setting in ovdb.conf.  You can enable compression
> without having to rebuild the database, in which case new records
> will be compressed but existing records will remain the same.
> To gain immediate benefit, you'll have to delete the databases
> and rebuild them using makehistory.
> 
> If you don't enable compression the database will remain
> backward-compatible with older versions of ovdb.
> 
> On my server with about 21 million overview records, after
> rebuilding the databases with compression enabled, the overview
> directory went from around 20 GB to 12.6 GB, and the expireover
> run went from 6 hours to 2 hours.
> 
> I also have this working on a 2.4.1 server, so if anyone wants
> to try compression I can make a patch available on my web page.
> 
> - - heath
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG v1.2.4 (Darwin)
> 
> iD8DBQFAy1wd4uXPAG0A1J4RAgGvAJ9CbyNYFyx+fITQpPkmweGj7YlhXQCgusla
> HuBY//nGdrI6mJ42oxT9z80=
> =qK1r
> -----END PGP SIGNATURE-----
> 
> 
> ------------------------------
> 
> End of inn-workers Digest V6 #124
> *********************************
> 

I'd like to see this.

-- 
Andrew Clark
Campus Network Programmer
University of California, Santa Barbara
andrew.clark at ucsb.edu (805) 893-5311