Re: [tlug] SATA software RAID or SAS hardware RAID?

[Edward Middleton <edward@example.com>]

>
> Edward Middleton writes:
>
>  > If you are only running on a single machine why are you using PVM?
>
> If you are reproducing footnote 1, why aren't you reading it? ;-)
>
>  > > [1]  Using the PVM package, which probably communicates via TCP/IP
>  > > over Unix-domain sockets.  MPIv2, several implementations of which
>  > > have good shared memory support, seems to be the way to go for real
>  > > work, but PVM comes with "batteries included" for demos, eg, a nice
>  > > XPVM visual monitor, and extending to heterogenous networked VMs is
>  > > trivial.
>
>  > Perhaps it is not optimized for parallel processing on a single machine.
>
> Well, sure---communicating via sockets is not the way to go on a
> single machine if you have greed for speed.  Point is, "requires
> optimization" is what I meant by "non-trivial".

You might get more of a speed increase by reformulating your problems so
that it is more distributable. The increase in speed I got was the
result of using a computationally more expensive algorithm, implemented
in the sun libraries, that was inherently more distributable. It was
faster on the same machine even though it required more calculations
because the calculations ran in parallel.

Edward