Subject:
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Re: Desktops with SCSI RAM?
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Newsgroups:
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lugnet.off-topic.geek
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Date:
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Thu, 25 May 2000 12:52:56 GMT
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Reply-To:
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MATTDM@avoidspamMATTDM.ORG
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Viewed:
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134 times
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Selçuk Göre <ssgore@superonline.com> wrote:
> Performance increase is not worth the price paid I think, especially in
> these days of light speed EIDE/UDMA2 drives.
Depends what you're doing and how much you really care about performance.
My friend Paul and I both have Linux systems that get backed up over the
network by our Operations group. They're mostly identical systems, but
Paul's is all IDE and mine is all SCSI. Normally, backups happen in the
middle of the night, but sometimes they're late completing and run into the
morning. At these times, Paul's system is completely unusable, with system
load as high as 10 or 12. By contrast, mine doesn't get higher than 0.33.
(System load is a rough measure of demand for CPU time. "1" means full
demand for one CPU. These are both single-processor boxes -- Paul's is
overloaded by the disk-intensive backup job by 10x.)
--
Matthew Miller ---> mattdm@mattdm.org
Quotes 'R' Us ---> http://quotes-r-us.org/
Boston University Linux ---> http://linux.bu.edu/
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Message has 1 Reply:
 | | Re: Desktops with SCSI RAM?
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| This is a result of the Number One difference between IDE/UDMA and SCSI; IDE 'borrows' number-crunching from the system processor (thus affecting processor load and responsiveness), whereas SCSI has all the number-crunching built into the controller (...) (24 years ago, 26-May-00, to lugnet.off-topic.geek)
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Message is in Reply To:
| | Re: Desktops with SCSI RAM?
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| (...) Actually I never heard a thing like "SCSI RAM", but I'm not familiar with systems other than PCs, so it can be. In case you mean a SCSI subsystem for HDD, CD-ROM and such devices, You may have it easily, although it might be quite expensive (...) (24 years ago, 9-Apr-00, to lugnet.off-topic.geek)
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