Horace - I've run more tests and come up with basically the exact same numbers you do. On Opensolaris - I get about the same from my drives (140MBps) and hit a 1GBps (almost exactly) top end system bottle neck when pushing data to all drives.
However, if I give ZFS more than one drive (mirror, stripe, raidz) it cannot go beyond the performance of a single drive on reads. (However writes seem to perform much better - but that could be due to the ZIL and/or caching. I've seen writes jump beyond 900MBps for a pool) I should point out that I tried SVM (solaris volume manager - comparable to mdraid on linux) and SVM was able to push 1GBps during initialization but couldn't go beyond what ZFS was capable of when doing a dd test. This SVM test was just a quick test before trying Linux since, like Linux, it takes forever to init an SVM device. I'm not very familiar with SVM - so I'm sure tuning could be an issue here - however with the kind of hardware you and I are working with, I would think at a minimum we should expect much better numbers, even without tuning. Unless the Opensolaris code is all tuned for ancient hardware. (Or *gasp* perhaps it's all tuned for SPARC or AMD) Dunno. I am now installing Linux to test. Would you mind giving me some information on what your Linux distro/configuration is approximately? Our numbers are so similar that I think we may be running into the same issue here - whatever it is. -- This message posted from opensolaris.org _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
