Re: kernel work week of 3-Feb-2010 HEADS UP

[Magnus Eriksson <magetoo@xxxxxxxxxxx>]

I usually only lurk on the DF lists, but I just have to jump in and say 
how cool I think this is.  I'll definitely have to try out the next 
release now..


On Wed, 3 Feb 2010, Matthew Dillon wrote:

> :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.

. ..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