Re: kernel work week of 3-Feb-2010 HEADS UP
:...but you are leaving some room for also using it as a write cache later,
:right? Whether it's some special hook for HAMMER's un/redo log, or
:something completely filesystem agnostic, it seems it could be a huge
:benefit to some applications. (like databases?)
:
:Just thinking out loud: if you have some resident-like way of "locking"
:data on the SSD, that might be an interesting way to get something similar
:to ReadyBoost. (That would perhaps make for a neat GSoC project?)
:
:MAgnus
Yes, it's theoretically possible by creating a small partition
on the SSD (separate from the swap partition) and assigning
all of HAMMER's UNDO FIFO disk blocks to it. That would make
fsync() considerably faster (65uS instead of 4-10ms). It's
not on my personal TODO list though.
-Matt
Matthew Dillon
<dillon@backplane.com>
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