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2013 Apr 29
1
OSTs inactive on one client (only)
...a couple of the other clients are very busily using Lustre. But still, I would have hoped that this client (abacus) would have regained its connections after a few hours. Any ideas as to what I can do, short of rebooting the client? I am nervous about that leaving incomplete I/O. Thanks, Patrick Shopbell pls at astro.caltech.edu
2013 Aug 22
13
Lustre buffer cache causes large system overhead.
We have just discovered that a large buffer cache generated from traversing a lustre file system will cause a significant system overhead for applications with high memory demands. We have seen a 50% slowdown or worse for applications. Even High Performance Linpack, that have no file IO whatsoever is affected. The only remedy seems to be to empty the buffer cache from memory by running