On Thu, 2 Jul 2009, Zhu, Lejun wrote:

Actually it seems to be 3/4:

3/4 is an awful lot. That would be 15 GB on my system, which explains why the "5 seconds to write" rule is dominant.

It seems that both rules are worthy of re-consideration.

There is also still the little problem that zfs is incable of reading during all/much of the time it is syncing a TXG. Even if the TXG is written more often, readers will still block, resulting in a similar cumulative effect on performance.

Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/
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