On Tue, Nov 10, 2009 at 8:48 AM, Asdo [off-list ref] wrote:

Chris Worley wrote:

quoted

I'm not sure if you're agreeing or disagreeing here...
280MB/s<300MB/s, due to the "compatibility" based design of SSD's,
while SSS, w/o a legacy controller, can do 800MB/s out of a single
drive.

I have not heard about these SSS you mention.
Do you have a link?

All the Fusion-io products (fusionio.com) and TMS's (ramsan.com) RS20
are two examples (not their RAM-based products).  Sun has their
"Sunfire", but I haven't seen that yet.

Also are you sure that the SATA/SCSI layer is the problem? Some hardware
raids can do 800 MB/s sequential, single stream, and indeed with a SATA/SAS
interface to the kernel. If what you say was true, that would be
impossible...

Sequential/streaming performance is a corner case.  There are many
high speed solutions to that (even using rotating media).  I'm talking
random I/O at 128KB blocks at 800MB/s per drive.

Chris