Re: Is FSFS compressing stored data?

On Oct 13, 2004, at 8:05 PM, Greg Hudson wrote:

>> They both compress. The reasons BDB is bigger are complex, and have
>> to do with how databases allocate storage.
>
> Er, no, BDB stores the head revision in uncompressed plaintext,
> whereas FSFS stores all file revisions as deltas against something.
> (The first rev of a file is stored as a delta against empty.)
>

How does FSFS store the HEAD revision then? If it needs to process
deltas to get the HEAD revision that would lead to performance problems
would it not? I was under the impression that the usually way to store
versions is to use reverse deltas from the HEAD revision to get the
older revision, so generally the HEAD revision is stored verbatim (as
you say it is for BDB).

Scott

---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@subversion.tigris.org
For additional commands, e-mail: users-help@subversion.tigris.org
Received on Thu Oct 14 14:36:04 2004