Re: [GNUnet-developers] Databases benchmark and problem

[Christian Grothoff]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Well, the current use of 'diskquota' may need to be fixed (but there should be 
a fixme in the code). If you specify a quota of 300 MB, that means that 
GNUnet is allowed to store 300.000 of the 1k blocks. We assume that indexing 
takes "no" space for the indices (32 byte + DB overhead) and that the 1k 
blocks have no overhead (in fact they have 32 byte + DB overhead). 

You should get some 'reaction' from the code once you insert more than 300.000 
blocks. [and yes, we may want to fix the quota-check to take the overhead 
into account; this will require some minor changes]

Christian

On Tuesday 15 April 2003 08:23 am, eric haumant wrote:
> Hello,
>
> I've just made some tests with the five database types of GNUnet. This
> results have been made with a 100Mo file (with random content) that have
> been inserted in the database. Here is the results :
>
> - MySQL :
>    Upload Speed : 400 ko/s
>    Download Speed : 300 ko/s
>    Space used : 113 Mo.
>
>
> - GDBM :
>    Upload Speed : 500 ko/s
>    Download Speed : 400 ko/s
>    Space used : 148 Mo.
>
> - TDB :
>    Upload Speed : 27 ko/s
>    Download Speed : 12 ko/s
>    Space used : 118 Mo.
>
> - BDB :
>    Upload Speed : 340 ko/s
>    Download Speed : 260 ko/s
>    Space used : 435 Mo (DISKQUOTA=300 !!).
>
> - DIRECTORY :
>    Upload Speed : 100 ko/s
>    Download Speed : 300 ko/s
>    Space used : 450 Mo (DISKQUOTA=300 !!).
>
>
> While benchmarking, I had some problem with local file download. With most
> of the database types (except TDB) the download drops down at the beginning
> and at the end. I have to restart the download a few times to continue.
>
> As you can see, TDB is very slow and BDB uses lots of place (not as much as
> DIRECTORY). So, for the moment MySQL and GDBM are the most powerfull
> databases.
>
> I found another thing interesting. When inserting content, the "DISKQUOTA"
> that is specified has no importance. You can, then, use lots of space.
> GNUnet should stop the insertion and say that there is no more space left.
>
> Eric.
>
>
>
>
> _______________________________________________
> GNUnet-developers mailing list
> address@hidden
> http://mail.gnu.org/mailman/listinfo/gnunet-developers
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.0.6 (GNU/Linux)
Comment: For info see http://www.gnupg.org

iD8DBQE+nEGf9tNtMeXQLkIRAhpCAJ9vdaKhGj1W5kbutjnsKqHtrkXlgACgoGJd
ZNAh6P53qWzzdnf9qAB+QK4=
=4Ip9
-----END PGP SIGNATURE-----