Customize restic backup settings

docs/30_Configuration/60_File_env.md

@@ -3,8 +3,6 @@ Here you can set custom environment variables.
 
 A common usage is extending the variable PATH to execute binaries that are not located in any directory.
 
-WIP: Or you can override used parameters during backup. The parameters for mysqldump are in env_defaults. If you want to change them then put ``LD_MYSQL_DUMP_PARAMS=...`` into env file.
-
 Example:
 
 This might be helpful on MS Windows. If you put the restic binary "somewhere" eg. c:\portable\restic\restic.exe then you can add the path to the env file:
@@ -12,3 +10,62 @@ This might be helpful on MS Windows. If you put the restic binary "somewhere" eg
 ```bash
 PATH=/c/portable/restic/:$PATH
 ```
+
+## Override parameters
+
+In the file ``jobs/env_defaults`` are some vars to set some defaults for the command lines during backup.
+Do not edit this file - it is part of the repository. To customize a value copy it to ``jobs/env`` and make your changes there.
+
+```bash
+#!/bin/bash
+# ----------------------------------------------------------------------
+#
+# DEFAULTS !!! Do not edit this file !!! 
+# Overide customizations in file "env" (maybe copy env.dist to env first)
+#
+# ----------------------------------------------------------------------
+
+# ----------------------------------------------------------------------
+# Localdump
+# ----------------------------------------------------------------------
+
+# mysql
+LD_MYSQL_DUMP_PARAMS="--opt \
+            --default-character-set=utf8 \
+            --flush-logs \
+            --single-transaction \
+            --no-autocommit \
+            "
+
+# ----------------------------------------------------------------------
+# Restic backup
+# ----------------------------------------------------------------------
+
+# compression mode (only available for repository format version 2), one of (auto|off|max) (default: $RESTIC_COMPRESSION) (default auto)
+# export RESTIC_COMPRESSION=auto
+
+# Concurrency for file reads (default: 2)
+# RESTIC_READ_CONCURRENCY=
+
+# Target size for pack files
+export RESTIC_PACK_SIZE=128
+
+# injected in command line for restic backup (not a variable of restic)
+RESTIC_PARAMS=--no-scan
+
+# ----------------------------------------------------------------------
+```
+
+### Localdump :: Mysql
+
+You can override used parameters during backup. The parameters for mysqldump are in env_defaults. If you want to change them then put ``LD_MYSQL_DUMP_PARAMS=...`` into env file.
+
+### Transfer :: Restic
+
+There are some environment variables for tuning
+
+* RESTIC_COMPRESSION
+* RESTIC_READ_CONCURRENCY
+* RESTIC_PACK_SIZE
+
+see <https://restic.readthedocs.io/en/latest/047_tuning_backup_parameters.html>
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