Re: kernel work week of 3-Feb-2010 HEADS UP
:Awesome :)
:
:Would such a SSD cache also improve write performance of a HAMMER file
:system?
:To improve write performance we'd probably need to put the UNDO/REDO log
:on a SSD...
No, the first iteration is strictly a clean slaved throw-away copy.
Writes run to the actual media and free any related underlying swap
copy. A new swap copy may be made later when the cached VM page
associated with the write cycles back out of main memory.
:And will the new system also cache mmap'ed data of a file?
:
:Regards,
:
: Michael
Yes. Both read() and mmap()'d data are backed by VM pages and are
applicable to the cache.
-Matt
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