The fixed blocksize is per LU. Different LU's can have different
blocksizes, but they are currently determined automatically, based on
the backing store for the LU.
On Apr 10, 2009, at Apr 10,1:15 PM, Sumit Gupta wrote:
>The heart of what I've discovered is that COMSTAR picks a block
size based on the device behind it, and appears to *always* >issue
IOs using that block size, no matter what the size of the requests
coming in across the wire. If the block device is >zvol, it uses
the zvol record size, which makes sense. If the block device behind
it is a physical disk, or SVM volume, it >picks 512 bytes as the
block size.
Do you mean the I/O to the COMSTAR's backend ? Or the blocksize of
the device exposed to the SAN ?
Sumit
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