On Sun, 11 Apr 2010, James Van Artsdalen wrote:
OpenSolaris needs support for the TRIM command for SSDs. This command is issued to an SSD to indicate that a block is no longer in use and the SSD may erase it in preparation for future writes.
There does not seem to be very much `need' since there are other ways that a SSD can know that a block is no longer in use so it can be erased. In fact, ZFS already uses an algorithm (COW) which is friendly for SSDs.
Zfs is designed for high thoughput, and TRIM does not seem to improve throughput. Perhaps it is most useful for low-grade devices like USB dongles and compact flash.
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
