On Thu, November 18, 2010 05:11, Moazam Raja wrote: > I tested the Fusion IO MLC based PCI-e cards on OpenSolaris and found > the performance to be amazing. Hopefully Fusion IO will release > supported drivers for Solaris 11 Express and onwards. The Fusion IO > MLC card was giving me around 500MB/s write performance with O_SYNC.
I think most SSDs will give one excellent performance, but a lot of people on this list also worry about data consistency as well. Many devices lie about doing cache flushes when they're told to, and this is a big issue when it comes to ZFS' on-disk consistency guarantees. Also, since most SSDs don't have batteries or supercaps, when the power goes away so does the DRAM cache, and so many in-flight operations could be lost. Fusion released a new model that "Guarantees data integrity in the event of power loss" with "No failure-prone batteries or super-capacitors needed to protect in-flight data": http://tinyurl.com/327ntp4 http://www.fusionio.com/press/Fusion-io-Delivers-Next-Generation-ioMemory-Module/ What that means I don't know. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
