On Mon, 14 Jun 2010, Roy Sigurd Karlsbakk wrote:
It is good to keep in mind that only small writes go to the dedicated
slog. Large writes to to main store. A succession of that many small
writes (to fill RAM/2) is highly unlikely. Also, that the zil is not
read back unless the system is improperly shut down.
I thought all sync writes, meaning everything NFS and iSCSI, went
into the slog - IIRC the docs says so.
Check a month or two back in the archives for a post by Matt Ahrens.
It seems that larger writes (>32k?) are written directly to main
store. This is probably a change from the original zfs design.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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