mirror of
https://github.com/octoleo/restic.git
synced 2024-12-23 11:28:54 +00:00
51 lines
2.2 KiB
ReStructuredText
51 lines
2.2 KiB
ReStructuredText
..
|
||
Normally, there are no heading levels assigned to certain characters as the structure is
|
||
determined from the succession of headings. However, this convention is used in Python’s
|
||
Style Guide for documenting which you may follow:
|
||
# with overline, for parts
|
||
* for chapters
|
||
= for sections
|
||
- for subsections
|
||
^ for subsubsections
|
||
" for paragraphs
|
||
########################
|
||
Tuning Backup Parameters
|
||
########################
|
||
|
||
Restic offers a few parameters that allow tuning the backup. The default values should
|
||
work well in general although specific use cases can benefit from different non-default
|
||
values. As the restic commands evolve over time, the optimal value for each parameter
|
||
can also change across restic versions.
|
||
|
||
|
||
Backend Connections
|
||
===================
|
||
|
||
Restic uses a global limit for the number of concurrent connections to a backend.
|
||
This limit can be configured using ``-o <backend-name>.connections=5``, for example for
|
||
the REST backend the parameter would be ``-o rest.connections=5``. By default restic uses
|
||
``5`` connections for each backend, except for the local backend which uses a limit of ``2``.
|
||
The defaults should work well in most cases. For high-latency backends it can be beneficial
|
||
to increase the number of connections. Please be aware that this increases the resource
|
||
consumption of restic and that a too high connection count *will degrade performace*.
|
||
|
||
|
||
CPU Usage
|
||
=========
|
||
|
||
By default, restic uses all available CPU cores. You can set the environment variable
|
||
`GOMAXPROCS` to limit the number of used CPU cores. For example to use a single CPU core,
|
||
use `GOMAXPROCS=1`. Limiting the number of usable CPU cores, can slightly reduce the memory
|
||
usage of restic.
|
||
|
||
|
||
Compression
|
||
===========
|
||
|
||
For a repository using at least repository format version 2, you can configure how data
|
||
is compressed with the option ``--compression``. It can be set to ```auto``` (the default,
|
||
which will compress very fast), ``max`` (which will trade backup speed and CPU usage for
|
||
slightly better compression), or ``off`` (which disables compression). Each setting is
|
||
only applied for the single run of restic. The option can also be set via the environment
|
||
variable ``RESTIC_COMPRESSION``.
|