Joined: 13 Feb 99
Yesterday I tried scoring 1M pixels (previously I'd been scoring 100K or so at a time).
The scoring itself was successful. However, the result was a directory containing 3M files. A script then moves these files into a 1-level hierarchy of 4096 directories. This script ran very slowly, like 1 file every 2-3 seconds. Apparently the filesystem on the Atlas machine does not implement directories in an efficient (constant-time) way. Surprising.
Anyway, I changed things so that the Condor jobs that score pixels put the output files directly into the hierarchy, so we no longer have super-big directories. Hopefully this will fix things.
Joined: 16 Jun 01
Any news how Nebula development going?
Did you able to score whole dataset already? If not what is current highest value of pixels processed at one pass?
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