On Mon January 4 2010, Adam Megacz wrote: > Has anybody tried using the GC-Ramdisk (aka iRAM -- four DDR DIMMs on a > PCI card with a battery backup) > > > http://www.gigabyte.com.tw/Products/Storage/Products_Overview.aspx?Produ > ctID=2180 http://en.wikipedia.org/wiki/I-RAM > > Performance is much better than flash memories, but the price per > gigabyte is much greater and maximum capacity is far less. It's really > closer to the nvram cache on a hardware raid card than an SSD. The fact > that it loses data after 16 hours without power is a little worrisome, > although it uses a standard nimh battery so you can replace that with > something that lasts a lot longer... > > Anyways, I'd be interested in hearing about anybody's experience with it. > > I'm thinking of using this for my md write intent bitmap and ext4 > journal, with "-o data=ordered" so close() and fsync() return as soon as > the data hits the DIMMs -- no need to wait for the disk to rotate around. > > Any comments? > > So often I hear debates about "hardware raid" versus "software raid" > which are actually debates over whether or not you ought to have some > sort of battery-backed write cache around. If I had one I might use it as a fs-cache. > - a > > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- Thomas Fjellstrom tfjellstrom@xxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
