external raid arrays
Jakob Østergaard
jakob at unthought.net
Thu Feb 21 10:45:20 PST 2002
On Thu, Feb 21, 2002 at 10:53:43AM -0600, Chris Black wrote:
> We are looking for an external RAID solution that will provide at LEAST
> 100MB/s read bandwidth, probably under RAID 10 (0+1). So far I have been
> disappointed with performance for external raid arrays that we have
> looked into, and I haven't found a good site with actual benchmarks
> for external raid arrays. So I'm using the list :)
> I know some of you probably have some experience in high performance
> external raid solutions so I'm asking for tips, suggestions, links, etc.
> I don't care if it is an Ultra160 connect or fibre channel, but I have
> no experience with fibre channel and don't know about compatible cards
> with linux.
> Our budget isn't quite in the EMC range, but I still figure there is
> something out there that someone on this list might know about.
> All replies appreciated. Thanks in advance!
How much space do you need ?
Why not simply mocking 12 SCSI disks in an internal enclosure, using
four LVD Ultra80/160 adapters, running RAID 0+1 over that ?
You could use Software RAID for good performance, all you'd need to do would be
to get a motherboard which has more than one PCI bus (133MB/sec marketing
bandwidth is a little close to 100 MB/sec).
Upsides: Cheap controllers, standard cabling, simplicity.
Downsides: Max. 12m cable length (AFAIR), get's compilcated with *many* disks
This solution would be pretty much lower than anything rhyming with EMC,
but please tell us more about what you need.
--
................................................................
: jakob at unthought.net : And I see the elder races, :
:.........................: putrid forms of man :
: Jakob Østergaard : See him rise and claim the earth, :
: OZ9ABN : his downfall is at hand. :
:.........................:............{Konkhra}...............:
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