Don't take my words as an expert advice, as I am newbie when it comes to ZFS.
If I am not mistaken, if you are only using Oracle on the particular Zpol, Oracle Checksum offers better protection against data corruption. You can disable ZFS checksums. Best regards Mertol 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 Scott Macdonald - Sun Microsystem Sent: 01 Şubat 2008 Cuma 15:31 To: zfs-discuss@opensolaris.org; [EMAIL PROTECTED] Subject: [zfs-discuss] Case #65841812 Below is my customers issue. I am stuck on this one. I would appreciate if someone could help me out on this. Thanks in advance! ZFS Checksum feature: I/O checksum is one of the main ZFS features; however, there is also block checksum done by Oracle. This is good when utilizing UFS since it does not do checksums, but with ZFS it can be a waste of CPU time. Suggestions have been made to change the Oracle db_block_checksum parameter to false which may give Significant performance gain on ZFS. What are Sun's stance and/or suggestions on making this change on the ZFS side as well as making the changes on the Oracle side. -- Scott MacDonald - Sun Support Services ---------------------------------------------------------------------------- ---------------------------------------------------------------- _/_/_/_/ _/ _/ _/_/_/ Technical Support Engineer _/ _/ _/ _/ _/ _/_/ _/ _/ _/ _/ Mon - Fri 8:00am - 4:30pm EST _/ _/ _/ _/ _/ Ph: 1-800-872-4786 (option 2 & case #) _/_/_/_/ _/_/_/ _/ _/ email: [EMAIL PROTECTED] M I C R O S Y S T E M S alias: [EMAIL PROTECTED] www.sun.com/service/support ---------------------------------------------------------------------------- ---------------------------------------------------------------- If you need immediate assistance please call 1-800-USA-4-SUN, option 2 and the case number. If I am unavailable, and you need immediate assistance, please press 0 for more options. To track package delivery, call Logistics at 1(800)USA-1SUN, option 1 Thank you for using SUN. _______________________________________________ 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
