On Tue, 4 Aug 2009, Vikas Gorur wrote:
You should be able to access other files while a file in a directory
is being self-healed (except for a brief period when directory entries
are being created/deleted).
The problem was ls was aliased to 'ls --color=auto', need to make sure I
fix this on all my systems.
Also, can you be modifying a file (say a xen file) at the same time it
is self-healing? If not, should other files still work with that client
during a self-heal?
Yes, you can be modifying a file while it is being self-healed.
Odd, all operations look locked during self-heal.
Lastly, any way to speed up self-heal with disable-direct-io-mode
required for xen? It lowers the I/O rate to a crawl from ~500 MB/s to ~25 MB/s.
Two things will help here:
a) With a recent FUSE kernel module (> 2.6.26) and forthcoming FUSE improvements
we'll be able to get good performance even with direct I/O mode disabled.
Is a recent kernel, or recent FUSE module required? I.E. Xen is something
that right now is stuck in the 2.6.18 world until at least 2.6.33.
You mention "forthcoming FUSE improvements" is this in the new 2.8 fuse or
gluster? Any time frame?
b) By the 2.1 release, replicate will use the rsync algorithm to do self-heal, which should again
cut down the time required to complete self-heal.
Great!
<>
Nathan Stratton CTO, BlinkMind, Inc.
nathan at robotics.net nathan at blinkmind.com
http://www.robotics.net http://www.blinkmind.com
