Edward Ned Harvey wrote:
I'm saying that even a single pair of disks (maybe 4 disks if you're using
cheap slow disks) will outperform a 1Gb Ethernet. So if your bottleneck is
the 1Gb Ethernet, you won't gain anything (significant) by accelerating the
stuff that isn't the bottleneck.
And you are confusing throughput with latency (in a sense).
Yes, my raidz2 pool is much faster than GigE, measured in pipelined,
streaming throughput (for those old fogeys like me, think good kermit /
zmodem).
Yet it still sucks for small non-pipelined synchronous writes, such as
those triggered by NFS + tar (think xmodem *shudder*).
So spending around $150 for a greater than 10x performance improvement
makes a hell of a lot of sense.
And yes, spending even more on an ACARD flash backed DRAM solution would
probably make things even faster, but I was feeling cheap ;-)
As for the DDRDrive X1, it is not a solution I would recommend to anyone
in its current state. If it gets a supercap / battery that enables it to
dump its data to non-volatile storage following a power cut, that will
change, and I know they have taken our feedback and are revising the
product.
--
Carson
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