Furthermore upgrading the server is probably not necessary as CPU
speed isn't normally the major factor as backup isn't CPU intensive.
I can just about bet you that Rick has RTFM and that is why he
mentions CPU. Retrospect's documentation states:
"For optimal backup performance, assign a relatively fast Macintosh
to run Retrospect."
Here the concept of "fast" doesn't necessarily imply fast CPU. A
"fast" computer will have a "fast" system bus which will be more
capable of greater I/O loads.
The truth of the matter is that CPU, for most backup applications,
doesn't come into play near as much for the average backup user as
it does for someone using software encryption and/or software
compression.
Which is normally handled in hardware these days, as can be encryption.
If you have a backup device with hardware compression, obviously
software compression isn't an issue. However, if he plans on using
encryption (not indicated in his message), CPU can make a bit of a
difference. In that case, throwing CPU and memory at it is usually
a good idea.
Note I stated "major factor". The major factor in backup is I/O load,
not CPU load, regardless of encryption or compression.
We mostly see CPU speed making an impact on compression when it's
useless, that is when the CPu is trying to compress already
compressed data. Normally a moderate CPU will be adequate in other
situations. In this situation it demonstrates that the Backup Policy,
where it defined the type of data to be backed up, wasn't read too
closely and compressions should have been avoided.
--
-dhan
------------------------------------------------------------------------
Dan Shoop AIM: iWiring
Systems & Networks Architect http://www.iwiring.net/
email@hidden http://www.ustsvs.com/
iWiring provides systems and networks support for Mac OS X, unix, and
Open Source application technologies at affordable rates.
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