Andrew Lentvorski wrote:
Well, RAM as storage? Not really. However, I wouldn't mind seeing it as a RAID1. The reads would be scorchingly fast while the writes would be at hard drive speeds. For people with read-mostly access patterns, this would be a big win.
This only works if you have a NUMA system or some other system with multiple memory controllers. When you use RAM as storage, you're limited by the bandwidth of the memory controller (and to some extent the speed of the memory, but modern memory can usually very easily saturate a memory controller). If you have two memory controllers, you thus have twice the memory bandwidth, resulting in twice the speed, etc.
However, I'm waiting for the first system with a combined flash drive/hard drive storage system.
I thought these existed and something in the micro$oft world could access them.
The flash system could be used for an initial cache and only wake the hard drive up intermittently for backup persistence or as a hedge against flash degradation.
that was my understanding of how they worked ... -kelsey -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
