On Dienstag, 31. August 2010 Eric Sandeen wrote: > Just be sure your first sector of your top-level block device > is 4k aligned, and then yes you'll want to set sector size to 4k > so that xfs will do all log IO in 4k blocks as well. I can only hope LVM does it right, I have no idea how it aligns. > If you do it right (and especially vs. if you do it wrong) it should > be a bit faster if all IOs are 4k aligned on the disk. And that's what's interesting me: why? Won't XFS do all I/Os at minimum for a given block size? Or is it possible XFS does write only a single sector? I'd expect the smallest I/O size to be the block size, but it seems I'm wrong? I guess there's no way to "convert" an existing XFS with sectsz=512,bsize=4096 to sectsz=4096,bsize=4096? Maybe that's only a flag that can be changed? -- mit freundlichen Grüssen, Michael Monnerie, Ing. BSc it-management Internet Services http://proteger.at [gesprochen: Prot-e-schee] Tel: 0660 / 415 65 31 ****** Aktuelles Radiointerview! ****** http://www.it-podcast.at/aktuelle-sendung.html // Wir haben im Moment zwei Häuser zu verkaufen: // http://zmi.at/langegg/ // http://zmi.at/haus2009/
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