Re: [BackupPC-users] Which FS?

Hi again

On Tue, 1 Sep 2009 03:32:00 +0200, Holger Parplies <wbppc AT parplies DOT de> 
wrote:
> >     wrong, the ls -l doesnt need to move to the files inode to do
> >     anything, the directory have all the necessary info.
> sorry, but that is just not true. 'ls -l' needs to do a stat() to

        Oops, you are right... i was thinking on the plain ls, the -l
        option will fetch alot more info

> more disk activity than on a 'normal' directory. Sorting the stat()
> calls by inode number would help, but I doubt 'ls' is optimized for
> such an unusual usage case (but I haven't checked, so I might be wrong).

        that is the job of the SCSI (and not SATA) command queuing, 
        reorder the requests to optimize the head seeks... that is
        also why IDE suck so much

        But anyway, if someone is working under RAM pressure or
        IO pressure, you have no cache, and without cache, all
        HDs/OS/filesystems will take a HUGE performance hit

cya
higuita
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