Vinum performance

Per olof Ljungmark peo at
Fri May 30 08:41:45 PDT 2003

> What ratio of reads to writes do you expect?

Had no expectations really, I'm new to Vinum.

>> Copying 170 files total 319MB TO the Vinum volume takes about 2m45s.
>> Copying same files FROM the Vinum volume to another volume on a 
>> hardware raid5 controller takes 43s.
> A 3-1 ratio in speeds for software RAID-5 versus hardware doesn't strike 
> me as being very wrong....
>> This machine is not in production yet so I can still make changes to 
>> the configuration. The current block size is 16384 and the stripe size 
>> 419k. I assume it would be a good idea to change that to for example 
>> 491,520?
> ...or try a few stripe sizes, such as 64K or 128K.

Thanks for your comments, I felt it was a good idea just to check before 
we start to use this piece seriously then I will not be able to touch it 
for changing configuration. Will try different stripe sizes as per your 

/per olof

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