On Fri, Jan 16, 2009 at 7:06 AM, andi <andi.platschek@xxxxxxxxx> wrote: > Peter Teoh wrote: >> >> Any filesystem can be used for SSD, but some are better suited due to >> SSD's hardware characteristic, among which is a lack of a moving >> read/write head. so which are the FS specially written to take >> advantage of this feature? >> > > I think this more about the I/O scheduler than the filesystem. When you use > a harddisk you don't want the > read/write head move more than necessary, and you want to get out as much as > possible of every move of the head. > > The I/O scheduler plans the sequence in which the I/O requests are performed > which can save you a lot of time on harddisks. > This is not necessary for memory without any mechanical parts like SSD's, > flash cards etc. > The linux kernel is using the Noop I/O scheduler for these devices, which > does no reordering, because it is not necessary for them. > > did I get this right? I am not sure, but I think is really more about the > I/O scheduler and less about the filesystem itself... > > andi >> YES, u do have a point there....so i am not sure as well....but after some googling....THANKS FOR YOUR INTUITION.... http://blogs.zdnet.com/perlow/?p=9190 YES, in the article above.....i/o scheduler=noop is recommended, together with the reasoning.....and more ... in the article were also mentioned not to have journalling ......etc. etc....worthwhile to read. -- Regards, Peter Teoh -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
