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From Karel Vervaeke <ka...@outerthought.org>
Subject Whirr overhead
Date Mon, 26 Sep 2011 16:28:31 GMT
I have been using whirr call simple scripts using whirr run-script,
but I have to say it's running way too slow to be usable.

Running parallel-ssh to call a simple script on a 2-node EC2 cluster
takes about 7 seconds.
Running the same script (more or less) takes more than 1min 30 secs.
I know that's comparing I'm apples with comfy chairs: Whirr is making
EC2 calls to check regions,zones, available hosts, ...
but all those EC2 api calls (I have counted 17, see attached log file)
come with a price (well, with time).

Are the EC2 calls really necessary? Maybe we should skip them
alltogether (look in the instances file) or provide caching cache the
EC2 results...


Karel Vervaeke
Open Source Content Applications
Makers of Kauri, Daisy CMS and Lily

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