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Merge pull request #3874 from MichaelEischer/disk-wear-note
Add note that larger packs increase disk wear
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1 changed files with 7 additions and 1 deletions
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@ -28,7 +28,7 @@ the REST backend the parameter would be ``-o rest.connections=5``. By default re
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``5`` connections for each backend, except for the local backend which uses a limit of ``2``.
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``5`` connections for each backend, except for the local backend which uses a limit of ``2``.
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The defaults should work well in most cases. For high-latency backends it can be beneficial
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The defaults should work well in most cases. For high-latency backends it can be beneficial
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to increase the number of connections. Please be aware that this increases the resource
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to increase the number of connections. Please be aware that this increases the resource
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consumption of restic and that a too high connection count *will degrade performace*.
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consumption of restic and that a too high connection count *will degrade performance*.
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CPU Usage
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CPU Usage
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@ -72,3 +72,9 @@ of backend connections plus one. For example, if the backend uses 5 connections
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for most backends), with a target pack size of 64 MiB, you'll need a *minimum* of 384 MiB
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for most backends), with a target pack size of 64 MiB, you'll need a *minimum* of 384 MiB
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of space in the temp directory. A bit of tuning may be required to strike a balance between
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of space in the temp directory. A bit of tuning may be required to strike a balance between
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resource usage at the backup client and the number of pack files in the repository.
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resource usage at the backup client and the number of pack files in the repository.
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Note that larger pack files increase the chance that the temporary pack files are written
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to disk. An operating system usually caches file write operations in memory and writes
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them to disk after a short delay. As larger pack files take longer to upload, this
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increases the chance of these files being written to disk. This can increase disk wear
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for SSDs.
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