On Thu, 7 May 2009, Scott Lawson wrote:
Just thought I would point out that these are hardware backed RAID arrays. You might be better off using the J4200 instead for this so ZFS can manage the disks completely as well. Will probably be cheaper too! The savings couldA STK2540 storage array with this configuration: * Tray 1: Twelve (12) 146 GB @ 15K SAS HDDs. * Tray 2: Twelve (12) 1 TB @ 7200 SATA HDDs.be put towards some SSD's or more system RAM for L1ARC.
Something nice about the STK2540 solution is that if the server system dies. The STK2540's can quickly be swung over to another system via a quick 'zfs import'. If SSDs are embedded inside the server system then it is necessary to physically move the log devices to the new system.
The issue about how to quickly recover after the server dies seems to rarely be discussed here. Embedded log devices tend to make issues more complex.
A dumb SAS array is certainly much cheaper and will perform at least as well, but it does seem like these newfangled embedded log devices cause an issue when maximum availability is desired. With SAS it is necessary to physically swing the cables to the replacement server and of course the replacement server needs to be very close by.
Bob -- Bob Friesenhahn bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
