> > There is also a longer PhD thesis by her. 10 minutes is about as much
> > work as I personally am willing to lose and try to remember. Avoiding
> > 75% of writes instead of 20% is a substantial performance gain worth
> > paying a cost for. Unfortunately it is not easy to say if it is worth
> > that much cost, but I suspect it is. An approach we are exploring is
> > for blocks to reach disk earlier than that if the device is not
> > congested, on the grounds that if not much IO is occuring, then
> > performance is not important.
>
> Assuming your 10 minutes are just a default and tunable by sysctl I
> hardly can see any problems at all. Paranoid people can set it to
> make any tradeoff between performance and speed they'd like including
> setting it to 0, no?
It has traditionaly been 30 seconds, so I'd suggest default stays.
Pavel
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