On Tue, Sep 11, 2007 at 01:31:17PM -0700, Bill Moore wrote: > I would also suggest setting the recordsize property on the zvol when > you create it to 4k, which is, I think, the native ext3 block size. > If you don't do this and allow ZFS to use it's 128k default blocksize, > then a 4k write from ext3 will turn into a 128k read/modify/write on the > ZFS side. This could easily explain your performance issues. > > Try this out and let us know what the results are.
A slight clarification: the default volblocksize (zvol version of recordsize) is 8k, not 128k. The default recordsize (not applicable to zvols) is 128k. - Eric -- Eric Schrock, Solaris Kernel Development http://blogs.sun.com/eschrock _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
