Perhaps this is not the right topic, but I want to say a few words to
Oracle:
Oracle uses raw-devices, because they thought it was the fastest
solution. In the meantime they have support for NetApp-Filers. So Oracle
goes through the Net (may be private for being faster) and then runs
into the Cache of the NetApp-Filer. So Oracle has no overhead for
Filemanagement, and can be faster so, and the Net-App-Filer is optimized
for Disk-IO and is thus faster.
The Bottleneck in this configuration is the net. But still Oracle
support this solution and say that it is indeed faster than the
Raw-Device solution if you have a fast net.
So if the File-Handling of Linux is better than in other Unixes why not
use the "normal" Devices. Even this is supported by Oracle and often set
up so, because increasing Database-Size is much easier than with
Raw-Devices.
And "normally" other Unixes use their Raw-Devices for fschk-ing their
partitions. Even that's the point why there are Raw-Devices at all.
Martin
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