I'm trying to put together our "next generation" database server to power
our web transaction engine.
Mostly for cost and comfort factors I've decided to stick with Intel, NT,
DB2 and SCSI one last time.
So my plan is:
IBM xSeries 350, Four Xeon processors
2-4 GB DRAM
ServeRAID-4H Ultra160 SCSI Controller
Six internal 18GB SCSI drives for boot and DB2 logs in a RAID-10
(two RAID channels striped three disks across each channel with the
channels mirroring each other)
EXP300 Storage Expansion Unit
Fourteen 18GB SCSI drives for DB2 tables in a RAID-10
(two RAID channels striped seven disks across each channel with the
channels mirroring each other)
About $44K for the hardware and much more for the DB2 licences.
The plan is to stripe each file across the full breadth of a channel and
let the battery backed write-back cache on the RAID controller buffer the
collisions between tables/files so that all the disks can blast away for
their full combined write bandwidth.
The total bandwidth on each channel will not be tapped often because the
buffer pools will have the complete working set of data cached into DRAM
and the disks will be limited by their random write speeds.
Anything I should change before placing that order?
-HJC
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