On Tue, Nov 10, 2009 at 8:48 AM, Asdo <asdo@xxxxxxxxxxxxx> wrote: > Chris Worley wrote: >> >> 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 > -- 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
