By the way. All enterprise SSD's have internal Dram based cache. Some vendors may quote the write performance of the internal RAM device. Normally Nand drives due to read after write operations and several other reasons will not perform quite good under write based load.
Mertol Ozyoney Storage Practice - Sales Manager Sun Microsystems, TR Istanbul TR Phone +902123352200 Mobile +905339310752 Fax +902123352222 Email [EMAIL PROTECTED] -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bob Friesenhahn Sent: 27 Mayıs 2008 Salı 20:22 To: Tim Cc: ZFS Discuss Subject: Re: [zfs-discuss] ZFS in S10U6 vs openSolaris 05/08 On Tue, 27 May 2008, Tim wrote: > You're still concentrating on consumer level drives. The stec drives > emc is using for instance, exhibit none of the behaviors you describe. How long have you been working for STEC? ;-) Looking at the specifications for STEC SSDs I see that they are very good at IOPS (probably many times faster than the Solaris I/O stack). Write performance of the fastest product (ZEUS iops) is similar to a typical SAS hard drive, with the remaining products being much slower. This all that STEC has to say about FLASH lifetime in their products: "http://www.stec-inc.com/technology/flash_life_support.php";. There are no "hard facts" to be found there. The STEC SSDs are targeted towards being a replacement for a traditional hard drive. There is no mention of lifetime when used as a write-intensive cache device. Bob ====================================== Bob Friesenhahn [EMAIL PROTECTED], 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 _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
