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Update the new options.
Signed-off-by: David Sterba <dsterba@suse.com>
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Currently, balance operations are run synchronously in the foreground.
This is nice for interactive management, but is kind of crappy when you
start looking at automation and similar things.
This patch adds an option to `btrfs balance start` to tell it to
daemonize prior to running the balance operation, thus allowing us to
preform balances asynchronously. The two biggest use cases I have for
this are starting a balance on a remote server without establishing a
full shell session, and being able to background the balance in a
recovery shell (which usually has no job control) so I can still get
progress information.
Because it simply daemonizes prior to calling the balance ioctl, this
doesn't actually need any kernel support.
Signed-off-by: Austin S. Hemmelgarn <ahferroin7@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Signed-off-by: David Sterba <dsterba@suse.com>
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A short delay with a warning before starting a full balance should
improve usability. We have been getting reports from people who run full
balance after following some random advice and then get surprised by the
performance impact.
The countdown is done even when run from scripts, but as the whole
balance takes significanly more time, this shouldn't be an issue.
Signed-off-by: David Sterba <dsterba@suse.com>
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With help of ispell.
Signed-off-by: David Sterba <dsterba@suse.com>
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Signed-off-by: Alexander Fougner <fougner89@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Make the new balance filters' syntax more explicit. Other rewording and
reformatting.
Signed-off-by: David Sterba <dsterba@suse.com>
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Add the overlapping usage and [usage_min, usage_max] members to the
balance args. The min/max values are interpreted iff the corresponding
flag BTRFS_BALANCE_ARGS_USAGE_RANGE is set.
The minimum boundary is inclusive, maximum is exclusive:
* usage_min <= chunk_usage < usage_max
Signed-off-by: David Sterba <dsterba@suse.com>
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Add new balance filter 'stripes=<range>' to process only chunks that are
spread accross given number of chunks.
The range minimum and maximum are inclusive.
Signed-off-by: Gabríel Arthúr Pétursson <gabriel@system.is>
[ reworked a bit to use the range helpers, dropped the single value
for stripes ]
Signed-off-by: David Sterba <dsterba@suse.com>
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Add the overlapping limit and [limit_min, limit_max] members to the
balance args. The min/max values are interpreted iff the corresponding
flag BTRFS_BALANCE_ARGS_LIMIT_RANGE is set.
The minimum and maximum are inclusive.
Note that the values are only 32bit, but this should be enough for the
foreseeable future.
Signed-off-by: David Sterba <dsterba@suse.com>
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Signed-off-by: David Sterba <dsterba@suse.com>
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Signed-off-by: David Sterba <dsterba@suse.com>
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A few minor benefits:
* editors set highliting according to the extensions
* web access to the git repository (github) renders the .asciidoc
files:
* we can link to them from the wiki
* the files are editable via browser and such editations can be
submitted for merge easily
Signed-off-by: David Sterba <dsterba@suse.cz>
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