On Fri, 4 Sep 2009, Scott Meilicke wrote:
So what happens during the txg commit?
For example, if the ZIL is a separate device, SSD for this example, does it not
work like:
1. A sync operation commits the data to the SSD
2. A txg commit happens, and the data from the SSD are written to the spinning
disk
So this is two writes, correct?
From past descriptions, the slog is basically a list of pending write
system calls. The only time the slog is read is after a reboot.
Otherwise, the slog is simply updated as write operations proceed.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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