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From: Steven Cruz <steve at nextopia dot com>
Subject: Re: Disk Init raw disks on Linux
Date: Jun 8 1999 2:03PM
Hello;
I just read this and was wondering about reading from RAW devices, and
user level threads. Dose the data server not perform better when reading
from raw devices? When reading the a file OS will suspend the dataserver
process until the IO request is complete. For one query you may not
notice a difference. However what about 10 quires? Concurrent throughput
will be slower if the other nine process do not need to perform any file
reads.
> > This is one of the minor complaints about Linux. No support for
> > RAW partitions. What I mean is, Linux currently buffers the I/O to the
> > "raw" partition. In truth, your database may be safer on the EXT2
> > filesystem.. Use of a RAW partition is basically only beneficial for
> > recoveribility. Having the I/O buffered negates this benefit.
> >
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