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Wed, 16 Apr 2008

Massively multithreaded POHMELFS server.

Because of completely asynchronous POHMELFS nature it is possible to implement mulithreaded server, where not only requests from different clients are processed in parallel, but also async requests from the same users are handled simultaneously by pool of threads.
Such multithreading requires to introduce transactional model of the communications, for example object creation and writing data, right now this race is handled by sending a reply after creation, so the whole writeback sleeps waiting for that, which drops performance (to NFS level). Transaction contrary will contain both operations, which will be processed by the same thread without race. It can also handle other problematic places with multiple server threads.

So far userspace server can run several or one processing thread per client, but there is no transactions implemented. I just started AIO reading implementation, which should provide great speedup for any reading workload.

Stay tuned!

/devel/fs :: Link / Comments (0)

Meanwhile at appartment development side.

Nothing happend, but I made couple of photos. Will setup a full gallery somewhat later, when finish things, so far couple room photos and x-shelves.

/devel/flat :: Link / Comments (0)