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RE: Subversion and large directories

From: Jan Evert van Grootheest <j.grootheest_at_euronext.nl>
Date: 2003-12-18 10:38:53 CET

Balázs,

I have had problems with large directories in the past as well. The largest
I've tried contained some 5000 files.
I didn't try to tweak the DB_CONFIG values, though.
IIRC, Ben also admitted that SVN doesn't really scale well with the number
of files in a directory.

-- Jan Evert

> -----Original Message-----
> From: Balázs Szabó [SMTP:dlux@dlux.hu]
> Sent: Sunday, December 14, 2003 11:54 PM
> To: users@subversion.tigris.org
> Subject: Subversion and large directories
>
> Hi,
>
> I have just started to use subversion for archiving my mails. Yes, it
> sounds strange, but it costs much less space than always tar.gz my 500M
> mail-archive.
>
> My mailbox-collection is in Maildir format, and the largest directory
> contains 22700 emails. The problem is that subversion is slowed down when
> imports this large directory. (In the beginning it imported 10-15
> mails/sec, now it takes 20 seconds to import one mail).
>
> I have tweaked DB_CONFIG with the following values:
>
> set_lk_max_locks 50000
> set_lk_max_lockers 50000
> set_lk_max_objects 50000
>
> set_lg_bsize 2097152
> set_lg_max 8388608
>
> set_flags DB_TXN_NOSYNC
> set_cachesize 0 234881024 3
>
> I have 256M memory in my machine, so I cannot give more cache to this.
>
> My vmstat showed that it reads a lot of data from the disk (5-10M/s) while
> importing the directory.
>
> Is it possible to speed up the import? I don't want to change my folder
> structure if not necessary...
>
> Regards,
>
>
> Balázs Szabó (dLux)
> dlux@dlux.hu
 

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Received on Thu Dec 18 10:40:44 2003

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