HAMMER Update 12-July-2008
dillon at apollo.backplane.com
Sun Jul 13 02:49:40 PDT 2008
Here's another update!
We're still on track for the release. HAMMER Development will continue
in HEAD next week after the branch, and then get synced to 2.0 for
the release. In the last few days:
* The mirroring support was finished this week and is undergoing
testing. This was the last big-ticket item on my list so yip yip!
* Miscellanious performance, memory, buffer cache deadlocks, and
undo fifo exhaustion issues have been fixed. Random write
performance has significantly improved.
Currently there are two known bugs:
* Filesystem full handling needs more work.
* There are some races between either the pruner or the reblocker,
and front-end access (such as a buildworld) which can result in
bad data that need to be addressed. I'm identifying which and
tracking it down.
It's probably the reblocker, related to the fact that it is
manipulating the B-Tree directly and not going through the
related inode/vnode, so there is minimal locking between the
reblocker and the front-end and possibly some buffer cache
<dillon at backplane.com>
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