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docs: use zlib,6 compression in some examples, fixes #275
This is what attic used by default, but borgbackup defaults to "no compression". I just adjusted the command invocation, so we can keep the example output (which shows that stuff was compressed). Also: add FAQ item about compression.
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3 changed files with 15 additions and 3 deletions
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@ -90,7 +90,7 @@ Initialize a new backup repository and create a backup archive::
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Now doing another backup, just to show off the great deduplication::
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Now doing another backup, just to show off the great deduplication::
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$ borg create --stats /mnt/backup::Tuesday ~/Documents
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$ borg create --stats -C zlib,6 /mnt/backup::Tuesday ~/Documents
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Archive name: Tuesday
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Archive name: Tuesday
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Archive fingerprint: 387a5e3f9b0e792e91c...
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Archive fingerprint: 387a5e3f9b0e792e91c...
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11
docs/faq.rst
11
docs/faq.rst
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@ -50,6 +50,17 @@ Which file types, attributes, etc. are *not* preserved?
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Archive extraction has optional support to extract all-zero chunks as
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Archive extraction has optional support to extract all-zero chunks as
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holes in a sparse file.
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holes in a sparse file.
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Why is my backup bigger than with attic?
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Why doesn't |project_name| do compression by default?
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* attic was rather unflexible when it comes to compression, it always
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compressed using zlib level 6 (no way to switch compression off or
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adjust the level or algorithm)
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* |project_name| offers a lot of different compression algorithms and
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levels. Which of them is the best for you pretty much depends on your use
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case, your data, your hardware - so you need to do an informed decision
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about whether you want to use compression, which algorithm and which
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level you want to use. This is why compression defaults to none.
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How can I specify the encryption passphrase programmatically?
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How can I specify the encryption passphrase programmatically?
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The encryption passphrase can be specified programmatically using the
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The encryption passphrase can be specified programmatically using the
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`BORG_PASSPHRASE` environment variable. This is convenient when setting up
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`BORG_PASSPHRASE` environment variable. This is convenient when setting up
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@ -201,8 +201,9 @@ Examples
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--exclude '*.pyc'
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--exclude '*.pyc'
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# Backup the root filesystem into an archive named "root-YYYY-MM-DD"
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# Backup the root filesystem into an archive named "root-YYYY-MM-DD"
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# use zlib compression (good, but slow) - default is no compression
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NAME="root-`date +%Y-%m-%d`"
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NAME="root-`date +%Y-%m-%d`"
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$ borg create /mnt/backup::$NAME / --do-not-cross-mountpoints
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$ borg create -C zlib,6 /mnt/backup::$NAME / --do-not-cross-mountpoints
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# Backup huge files with little chunk management overhead
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# Backup huge files with little chunk management overhead
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$ borg create --chunker-params 19,23,21,4095 /mnt/backup::VMs /srv/VMs
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$ borg create --chunker-params 19,23,21,4095 /mnt/backup::VMs /srv/VMs
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@ -315,7 +316,7 @@ Examples
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Hostname: myhostname
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Hostname: myhostname
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Username: root
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Username: root
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Time: Fri Aug 2 15:18:17 2013
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Time: Fri Aug 2 15:18:17 2013
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Command line: /usr/bin/borg create --stats /mnt/backup::root-2013-08-02 / --do-not-cross-mountpoints
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Command line: /usr/bin/borg create --stats -C zlib,6 /mnt/backup::root-2013-08-02 / --do-not-cross-mountpoints
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Number of files: 147429
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Number of files: 147429
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Original size: 5344169493 (4.98 GB)
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Original size: 5344169493 (4.98 GB)
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Compressed size: 1748189642 (1.63 GB)
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Compressed size: 1748189642 (1.63 GB)
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