On 12/23/09 10:11 AM, "Mike Walter" <mike.wal...@hewitt.com> wrote:


> In SFS, the SFS server manages a catalog mdisk.  That catalog has a pointer to
> every 4K block in the filepool.  When a (large or small) is erases, the block
> pointer for every file needs to be cleared, and IIRC, a bit in every block
> that the made up the block.   Without looking at the PTF, perhaps something in
> that process was updated to speed things up, just guessing.

Don't forget also that SFS has to manage a APPC connection and a dispatch of
another virtual machine involved. Much longer code path for similar
operations. 

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