Sparse/fallocate/uid/gid options for whisper-resize.py

[deniszh]

Fix #331

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (07f3db9) 87.83% compared to head (462261b) 87.83%.

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #332   +/-   ##
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  Coverage   87.83%   87.83%           
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  Files           2        2           
  Lines        1143     1143           
  Branches      206      191   -15     
=======================================
  Hits         1004     1004           
  Misses         99       99           
  Partials       40       40           

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[BBQigniter]

just a note - I love the --quiet and --silent changes. (Only found the new script it too late)

I lately had to do a mass resize and tried to figure out how to do it the fastest way. Using the xargs-approach for example via find ./ -name "*.wsp*" | xargs -P750 -n1 -I'{}' /opt/graphite/bin/whisper-resize.py --aggregate --nobackup {} 10s:6h 1m:6d 10m:90d, the resize would have taken 6h+ - as we are currently using a the latest available graphiteapp/graphite-statsd:1.1.10-5 container, were the old whisper-resize.py script is included.

After checking the script in the container, I just commented the line print("oldtimestamps: %s" % oldtimestamps). The resize took on a test-maschine 1-2h instead. Also memory usage dropped from roughly 15-16G to about 4G max while running that amount of resize-tasks.