Parse and sum size expressions like 1G or 200M
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Authored by dereckson on Dec 25 2023, 19:54.

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dereckson

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rSPACESUM92ce270cd93f: Parse and sum size expressions like 1G or 200M

Summary

ZFS commands like zfs list -t snapshot display sizes easy to read
by humans like 0B, 5K, 1G, 200M or 3T.

To answer questions like "What's the total size of all the snapshots
for that dataset?", this means to be able to compute basic additions
using terms with units.

This utility can do this:

zfs list -t snapshot | grep name | awk '{print $2}' | space-sum

Test Plan

cargo build
space-sum -h
zfs list ... > zfs-sizes.txt ; space-sum zfs-sizes.txt
zfs list ... | space-sum

Diff Detail

Repository

rSPACESUM space-sum

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main

Build Status

Buildable 5138
Build 5419: arc lint + arc unit

Event Timeline

dereckson requested review of this revision.Dec 25 2023, 19:54

dereckson created this revision.

Harbormaster completed remote builds in B5138: Diff 8363.Dec 25 2023, 19:54

WindRiver

$ zfs list -t snapshot | grep dereckson | awk '{print $2}' | space-sum
2.244G

$ space-sum -h
Read size expressions like 200M or 2G and compute the sum.

Usage: space-sum [FILENAME]

Arguments:
  [FILENAME]  The file containing sizes to sum. If omitted, values are read from stdin.

Options:
  -h, --help     Print help
  -V, --version  Print version