zram-generator(8)

1ZRAM-GENERATOR(8)                                            ZRAM-GENERATOR(8)
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NAME

6       zram-generator - Systemd unit generator for zram swap devices
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SYNOPSIS

9       /usr/lib/systemd/system-generators/zram-generator TARGET_DIR [2RGET_DIR
10       3RGET_DIR]
11       /usr/lib/systemd/system-generators/zram-generator --setup-device DEVICE
12       /usr/lib/systemd/system-generators/zram-generator --reset-device DEVICE
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DESCRIPTION

15       zram-generator is a generator that creates  zram  devices  and  systemd
16       units to configure, format, and enable swap on them.
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18       The  generator  will be invoked by systemd early at boot. The generator
19       will then:
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21       1.  read  configuration  files  from   {/etc,/lib}/systemd/zram-genera‐
22           tor.conf[.d] (see zram-generator.conf(5) for details);
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24       2.  generate systemd.swap(5) units into TARGET_DIR and make swap.target
25           depend on them;
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27       3.  ensure the zram module is loaded and create the requested devices.
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31       The generator does nothing if run inside a container (as determined  by
32       systemd-detect-virt(8) --container).
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34       Setting  the ZRAM_GENERATOR_ROOT environment variable makes the genera‐
35       tor run in test mode, in which case  containerisation  is  ignored  and
36       step 3 is skipped.
37       For  the  ramifications  of ZRAM_GENERATOR_ROOT on config handling, see
38       zram-generator.conf(5).
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40       The generated dev-zramN.swap units depend on zram-create@zramN.service,
41       which will:
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43       1.  read   configuration  files  from  {/etc,/lib}/systemd/zram-genera‐
44           tor.conf[.d] (see zram-generator.conf(5) for details);
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46       2.  set the desired compression algorithm, if any; if the current  ker‐
47           nel  doesn´t  understand  the  specified  algorithm,  a  warning is
48           issued, but execution continues;
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50       3.  set the desired blockdev size and  format  it  as  swap  with  sys‐
51           temd-makefs(8).
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55       When  the unit is stopped, the zram device is reset, freeing memory and
56       allowing the device to be reused.
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58       zram-generator implements systemd.generator(7).
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REPORTING BUGS

61       <https://github.com/systemd/zram-generator/issues>
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NAME

SYNOPSIS

DESCRIPTION

REPORTING BUGS

SEE ALSO