Which implies that a single data read will often equate to 2 physical IO's? With the subsequent implications for the total IOP/s supported by the devices...
T. -----Original Message----- From: Bob Friesenhahn [mailto:[email protected]] Sent: Thursday, 20 August 2009 8:42 AM To: Tristan Ball Cc: [email protected] Subject: Re: [storage-discuss] Restricting initiator resource consumption On Thu, 20 Aug 2009, Tristan Ball wrote: > > Do you know how close to the data the zfs checksum is stored? Is it possible > that one FS block read will actually result in two seperate physical IO's, > one for the data, one for the checksum? I don't know exactly where the zfs checksum is stored except to know that there are several copies of the checksum stored on each mirror disk, and they are in different data allocations than the user data blocks. Bob -- Bob Friesenhahn [email protected], http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ _______________________________________________ storage-discuss mailing list [email protected] http://mail.opensolaris.org/mailman/listinfo/storage-discuss
