On Sun, Sep 10, 2017 at 12:11:56AM +0200, Gionatan Danti wrote: > Hi all, > I noticed that, when using both LVM thin volumes and ZVOLs, mkfs.xfs > default to using 512-byte sector size. > > Would setting sector size to 4K be benefical for filesystem performance? Probably not. And, worse, you open up the possibility of torn "single sector" writes if the underlying device isn't a native 4k sector device. > From what I know, sector size only affect journal and metadata > writes. So, should I manually set sector size to 4K or it is not > worth the (minor) inconvenience? Only the log might matter for performance, the AG headers are only read at mount and rarely written because they are so frequently logged. But, really, the difference between 512 byte and 4k sectors for the log is going to be pretty damn small. Just use the defaults and only consider changing them if you observe problems... Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-xfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
