On 2012-05-01 00:09, Andrew Deason wrote:
-vhashsize
This changes the number of hash buckets for volumes. If you start to get
like tens of thousands or hundreds of thousands of volumes on a server,
you may want to raise it.
We have about 15-20 thousand volumes per server today. Maybe we should
try raising this a bit.
'-b 100000' seems pretty huge. The hash table size for dir buffers is
only 32, so assuming even distribution in the hash table, you've got
hash chains thousands of entries long. I'm not sure if that's a good
idea, but it depends on access patterns.
Ok. I don't remember why we chose that number. I've been searching the
net a bit, and seem to find much lower numbers for -b (like 600 or so).
/Staffan
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