Hi, ok I know zfs-fuse is still incomplete and performance has not been considered, but still, before I'm going to use it for my /home I wanted a rough estimate.
Another benchmark already asserted that zfs by itself, on Solaris, is a very fast beast (http://cmynhier.blogspot.com/2006/05/zfs-benchmarking.html), faster than ext3 on Linux and also faster than UFS. Interestingly UFS seems to be faster than ext3, I didn't know that. So, as a "feeling" benchmark I copied my home over to zfs-fuse, fired up Eclipse, and did a build of a large Java project. It felt /pretty/ slow, man. Next I ran a find(1) for a particular file, twice. Obviously the second run would be from cache, so I expected fast response. Well, not quite so fast with fuse: 1. real 2m6.785s user 0m0.968s sys 0m2.308s 2. real 0m46.920s user 0m0.844s sys 0m1.916s So the second run is not actually fast. Still, I observed that the disk was quiet during the second run, and top(1) showed the CPU maxed out by the zfs-fuse daemon. For comparison here is the same find(1) on another copy of my /home on ext3: 1. real 1m14.494s user 0m1.488s sys 0m4.928s 2. real 0m1.124s user 0m0.556s sys 0m0.496s So, at this point in time that seems pretty discouraging for an everyday user, on Linux. Hmmm, maybe I should try switch to OpenSolaris... but then how do I satisfy the need to occasionally run Windows in VMWare... Maybe, since this was on a scratch USB disk, I download a FreeBSD snapshot and see how that compares? Depends on how much time I get and what the wheather is like :) I'd be interested in others' thoughts, esp. why the daemon eats so much CPU when it only reads through cache. For reference, my /home is about 18GB with about 300.000 files. -- Regards, Georg. This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
