Sunday Jun 13, 2004

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Work is fun, been putting in too many hours. But, the move has been not so bad.

Really missing friends from back east.

Got sick. Ate vitamins and slept lots. Basically started treating myself with the style of a race horse trainer.

Started running again; also need to rebuild my upper body muscles. So much to do.

Also need to make sure sqook doesnt work too hard.
VIEW 8 of 8 COMMENTS
saruman:
And then you'd end up with a replication infrastructure. Something that would keep multiple copy of important meta-date properly distributed in the cluster.

You can't have an app server without duplication of some metadata. Even if it's only {input} and {output} of modules to enable replayability of a transaction in the event of a failure.

You need to have a mechanism to handle failure of an individual step and failure of a transaction controller.

I.e.:

The server who'd been asked to provide a banner ad does not reply. The controller proceeds to ask a second server and then takes step to remediate the first servers' problem.

But then if the controller fails, everything must be either rolled back to the initial request or another controller must seemlessly take over and continue with the transaction.
saruman:
File locking does not. You end up with either a small cluster of peers or a lock server. In either case, the latency around obtaining a lock becomes a significant factor.

Myrinet and InfiniBand can sort of solve that however.

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