Re: [zfs-discuss] slog and TRIM support [SEC=UNCLASSIFIED]
On Wed, Aug 25, 2010 at 6:18 PM, Wilkinson, Alex wrote: > 0n Wed, Aug 25, 2010 at 02:54:42PM -0400, LaoTsao ?? wrote: > >IMHO, U want -E for ZIL and -M for L2ARC > > Why ? -E uses SLC flash, which is optimised for fast writes. Ideal for a ZIL which is (basically) write-only. -M uses MLC flash, which is optimised for fast reads. Ideal for an L2ARC which is (basically) read-only. -E tends to have smaller capacities, which is fine for ZIL. -M tends to have larger capacities, which is perfect for L2ARC. -- Freddie Cash fjwc...@gmail.com ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
Re: [zfs-discuss] slog and TRIM support [SEC=UNCLASSIFIED]
-M has larger capacity and L2ARC is mostly for read and not much write and U also need memory for ARC L2ARC should be the sze of Ur working dataset ZIL is mostly for write and U want SSD for better write and longer life and ZIl may be <=1/2 phy memory regards On 8/25/2010 9:18 PM, Wilkinson, Alex wrote: 0n Wed, Aug 25, 2010 at 02:54:42PM -0400, LaoTsao ?? wrote: >IMHO, U want -E for ZIL and -M for L2ARC Why ? -Alex IMPORTANT: This email remains the property of the Department of Defence and is subject to the jurisdiction of section 70 of the Crimes Act 1914. If you have received this email in error, you are requested to contact the sender and delete the email. ___ 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
Re: [zfs-discuss] slog and TRIM support [SEC=UNCLASSIFIED]
0n Wed, Aug 25, 2010 at 02:54:42PM -0400, LaoTsao ?? wrote: >IMHO, U want -E for ZIL and -M for L2ARC Why ? -Alex IMPORTANT: This email remains the property of the Department of Defence and is subject to the jurisdiction of section 70 of the Crimes Act 1914. If you have received this email in error, you are requested to contact the sender and delete the email. ___ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
