Boy I
lost this battle here. The thing was the salesmonger insisted that with
all the caching and multipathing the Hitachi 9200 offered that we needent worry
about putting our production, development, admininstrative, and designer
databases all on a single (5 disk)RAID 5 array. We then had a conference
call with myself, our top IT folks, the sales monger and a Hitachi
engineer. I was very prepared going in, but figured the engineer would
still be able to out "tech" me. 10 minutes later I was surprised to hear
that the engineer agreed with me, that we would get much better performance
Striping and Mirroring.
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My
celebration was short lived when my manager declared that while were going
to spend 70K on Hardware, we would not be spending 77K to get the
disk configuration I proposed. He was essentially selling the sales
mongers point of view rather than mine and the Hitachi engineer. He
claimed we would never make I/O the bottleneck on this system. It didn't
take me long to discover some processes were indeed bottle necking on disk
I/O. Go figure all the I/O for the whole system on a single physical
device(array).
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That
said I JUST recently discovered that our multipathing software(vendor
installed-- not Hitachi) wasn't installed properly, so we really are only using
one pathway for all our I/O. Once we get that installed I am actually
afraid I will be pleasantly surprised at how well it works. I will
just have to be content knowing....as good as it is....it could be better
yet.
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Steve
McClure
Received on Thu Jun 12 2003 - 15:06:03 CDT
