On Fri, 24 Jul 2009, Kyle McDonald wrote:
http://www.anandtech.com/storage/showdoc.aspx?i=3531&p=8
This an interesting test report. Something quite interesting for zfs is if the write rate is continually high, then the write performance will be limited by the FLASH erase performance, regardless of the use of something like TRIM. TRIM only improves write latency in the case that the FLASH erase is able to keep ahead of the write rate. If the writes are bottlenecked, then using TRIM is likely to decrease the write performance. If data is written at an almost constant rate, then a time may come where the drive suddenly "hits the wall" and is no longer able to erase the data as fast as it comes in.
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
