Skip to content

Instantly share code, notes, and snippets.

@eredding-rmn
Forked from jjmaestro/whisper-calculator.py
Last active August 29, 2015 14:10
Show Gist options
  • Save eredding-rmn/44dfa5bc5f047e20214c to your computer and use it in GitHub Desktop.
Save eredding-rmn/44dfa5bc5f047e20214c to your computer and use it in GitHub Desktop.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
def archive_to_bytes(archive):
def to_seconds(s):
SECONDS_IN_A = {
's': 1,
'm': 1 * 60,
'h': 1 * 60 * 60,
'd': 1 * 60 * 60 * 24,
'y': 1 * 60 * 60 * 24 * 365,
}
return int(s[:-1]) * SECONDS_IN_A[s[-1]]
archive = [map(to_seconds, point.split(':'))
for point in args.archive.split(',')]
SIZE_METADATA = 2 * 4 + 4 + 4 # 16 [!2LfL]
SIZE_ARCHIVE_INFO = 3 * 4 # 12 [!3L]+
SIZE_POINT = 4 + 8 # 12 [!Ld]+
size = 0
for resolution, retention in archive:
size += SIZE_ARCHIVE_INFO + SIZE_POINT * retention/resolution
if size:
size += SIZE_METADATA
return size
if __name__ == '__main__':
import argparse
parser = argparse.ArgumentParser(
description="Calculates the size of the whisper storage for the given \
archive (in resolution:retention format, e.g. 1m:24h,5m:3m)"
)
parser.add_argument(
'archive',
help="Archive in storage-schemas.conf format (resolution:retention)"
)
args = parser.parse_args()
print "{} >> {} bytes".format(args.archive, archive_to_bytes(args.archive))
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment