When using compression, are the on-disk record sizes determined before or after compression is applied? In other words, if record size is set to 128k, is that the amount of data fed into the compression engine, or is the output size trimmed to fit? I think it's the former, but I'm not certain.
This could affect block alignment for SSDs, leading to worse write performance. It could also have a negative effect on 4k sector disks that lie about the sector size, such as the recent WD EARS drives. -B -- Brandon High : [email protected] _______________________________________________ zfs-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
