Adam Goryachev schrieb: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Tomasz Chmielewski wrote: > | Les Mikesell schrieb: > |> Tomasz Chmielewski wrote: > |>> Although - with IO::Dirent "wa" is now 100% almost all the time, and > |>> the system feels much slower. Hm. Let's hope it's coincidence, and > |>> assume the system was just committing a big write... > |> Is this on a raid5? There's a lot of extra work involved for small > |> updates like the directory writes for removing files (read old data, > |> write new parity, write new data) regardless of the filesystem involved. > | > | Oh, and I'm using an internal bitmap. > | > | I might remove that, it will save me some seeks... > If you have the opportunity, I would suggest giving reiserfs v3 a try. I > use reiserfs on my backuppc systems, and it works quite nicelty. Of > course, depending on the speed/size of disks it can make a big > difference as well. > > It isn't easy to 'try' different filesystems because you either need a > temporary medium to store all your backup data, and it also will take > days/weeks if you truly have a lot of data which is kind of required > else you wouldn't have performance issues in the first place.... > > In any case, if you (or anyone else) can, it would be really interesting > to see the difference in performance between ext3 and reiserfs, since > AFAICT, reiserfs is supposed to be very fast in handling small files, > which essentially is what hardlinks are all about....
Yeah, the problem is that migrating from one filesystem to another is not an easy operation. And certainly, it would take days or even longer to copy data somewhere else, create a new filesystem, copy the data back, test it etc. All that with an unknown outcome. Unless someone have really big motivation, we won't see such tests for large filesystems, I guess. -- Tomasz Chmielewski http://wpkg.org ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ BackupPC-users mailing list [email protected] List: https://lists.sourceforge.net/lists/listinfo/backuppc-users Wiki: http://backuppc.wiki.sourceforge.net Project: http://backuppc.sourceforge.net/
