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Add note that larger packs increase disk wear

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Michael Eischer 2022-08-19 19:19:33 +02:00
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doc/047_tuning_backup_parameters.rst
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@ -72,3 +72,9 @@ of backend connections plus one. For example, if the backend uses 5 connections
for most backends), with a target pack size of 64 MiB, you'll need a *minimum* of 384 MiB for most backends), with a target pack size of 64 MiB, you'll need a *minimum* of 384 MiB
of space in the temp directory. A bit of tuning may be required to strike a balance between of space in the temp directory. A bit of tuning may be required to strike a balance between
resource usage at the backup client and the number of pack files in the repository. resource usage at the backup client and the number of pack files in the repository.
Note that larger pack files increase the chance that the temporary pack files are written
to disk. An operating system usually caches file write operations in memory and writes
them to disk after a short delay. As larger pack files take longer to upload, this
increases the chance of these files being written to disk. This can increase disk wear
for SSDs.