On Fri, 2006-03-17 at 15:28, Merlin Moncure wrote: > On 3/17/06, Luke Lonergan <llonergan@xxxxxxxxxxxxx> wrote: > > > Now what happens as soon as you start doing random I/O? :) > > If you are accessing 3 rows at a time from among billions, the problem you > > have is mostly access time - so an SSD might be very good for some OLTP > > applications. However - the idea of putting Terabytes of data into an SSD > > through a thin straw of a channel is silly. > > I'll 'byte' on this..right now the price for gigabyte of ddr ram is > hovering around 60$/gigabyte. If you conveniently leave aside the > problem of making ddr ram fault tolerant vs making disks tolerant, you > are getting 10 orders of magnitude faster seek time and unlimited > bandwidth...at least from the physical device. While SANs are getting > cheaper they are still fairly expensive at 1-5$/gigabyte depending on > various factors. You can do the same tricks on SSD storage as with > disks. > > SSD storage is 1-2k$/gigabyte currently, but I think there is huge > room to maneuver price-wise after the major players recoup their > investments and market forces kick in. IMO this process is already in > play and the next cycle of hardware upgrades in the enterprise will be > updating critical servers with SSD storage. Im guessing by as early > 2010 a significant percentage of enterpise storage will be SSD of some > flavor. Now I'm envisioning building something with commodity 1U servers hold 4 to 16 gigs ram, and interconnected with 1g or 10g ethernet. Open Source SSD via iSCSI with commodity hardware... hmmm. sounds like a useful project.
