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59 lines
No EOL
2.5 KiB
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.. IMPORTANT: this file is auto-generated from borg's built-in help, do not edit!
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.. _borg_benchmark_crud:
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borg benchmark crud
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-------------------
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::
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borg [common options] benchmark crud <options> REPO PATH
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positional arguments
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REPO
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repo to use for benchmark (must exist)
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PATH
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path were to create benchmark input data
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`Common options`_
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Description
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~~~~~~~~~~~
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This command benchmarks borg CRUD (create, read, update, delete) operations.
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It creates input data below the given PATH and backups this data into the given REPO.
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The REPO must already exist (it could be a fresh empty repo or an existing repo, the
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command will create / read / update / delete some archives named borg-test-data* there.
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Make sure you have free space there, you'll need about 1GB each (+ overhead).
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If your repository is encrypted and borg needs a passphrase to unlock the key, use:
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BORG_PASSPHRASE=mysecret borg benchmark crud REPO PATH
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Measurements are done with different input file sizes and counts.
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The file contents are very artificial (either all zero or all random),
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thus the measurement results do not necessarily reflect performance with real data.
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Also, due to the kind of content used, no compression is used in these benchmarks.
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C- == borg create (1st archive creation, no compression, do not use files cache)
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C-Z- == all-zero files. full dedup, this is primarily measuring reader/chunker/hasher.
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C-R- == random files. no dedup, measuring throughput through all processing stages.
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R- == borg extract (extract archive, dry-run, do everything, but do not write files to disk)
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R-Z- == all zero files. Measuring heavily duplicated files.
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R-R- == random files. No duplication here, measuring throughput through all processing
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stages, except writing to disk.
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U- == borg create (2nd archive creation of unchanged input files, measure files cache speed)
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The throughput value is kind of virtual here, it does not actually read the file.
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U-Z- == needs to check the 2 all-zero chunks' existence in the repo.
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U-R- == needs to check existence of a lot of different chunks in the repo.
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D- == borg delete archive (delete last remaining archive, measure deletion + compaction)
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D-Z- == few chunks to delete / few segments to compact/remove.
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D-R- == many chunks to delete / many segments to compact/remove.
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Please note that there might be quite some variance in these measurements.
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Try multiple measurements and having a otherwise idle machine (and network, if you use it). |