Messages in this thread | | | From | ross@lug ... | Date | Thu, 20 Jan 2005 12:49:39 -0500 | Subject | Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling |
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On Thu, Jan 20, 2005 at 10:42:24AM -0500, Paul Davis wrote: > over on #ardour last week, we saw appalling performance from > reiserfs. a 120GB filesystem with 11GB of space failed to be able to > deliver enough read/write speed to keep up with a 16 track > session. When the filesystem was cleared to provide 36GB of space, > things improved. The actual recording takes place using writes of > 256kB, and no more than a few hundred MB was being written during the > failed tests.
It's been a long while since I followed ReiserFS development closely, *however*, this issue used to be a common problem ReiserFS - when free space starts to drop below 10%, performace takes a big hit. So performance improved when space was cleared up.
I don't remember what causes this or what the status is in modern ResierFS systems.
> everything i read about reiser suggests it is unsuitable for audio > work: it is optimized around the common case of filesystems with many > small files. the filesystems where we record audio is typically filled > with a relatively small number of very, very large files.
Anecdotally, I've found this to not be the case. I only use ReiserFS and have a few reasonably sized projects in Ardour that work fine: maybe 20 tracks, with 10-15 plugins (in the whole project), and I can do overdubs with no problems. It may be relevant that I only have a four track card and so load is too small.
But at least in my practice, it hasn't been a huge hinderance.
-- Ross Vandegrift ross@lug.udel.edu
"The good Christian should beware of mathematicians, and all those who make empty prophecies. The danger already exists that the mathematicians have made a covenant with the devil to darken the spirit and to confine man in the bonds of Hell." --St. Augustine, De Genesi ad Litteram, Book II, xviii, 37 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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