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<!DOCTYPE html>
< html >
< head >
< style >
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/* similar to sphinx alabaster theme ones */
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body {
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max-width: 90ch;
margin-left: 2ch;
margin-right: 2ch;
line-height: 1.4em;
/* avoid the very high contrast of black on white, tone it down a bit */
color: #3E4349;
hyphens: auto;
text-align: left;
font-family: 'Open Sans', sans-serif;
font-size: 17px;
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}
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h1, h2, h3, h4, h5, h6 {
color: #2a2b2c;
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font-family: Lato, sans-serif;
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}
h1, h2, h3 {
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font-size: 150%;
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line-height: 1.2;
}
h4, h5, h6 {
font-size: 125%;
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}
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tt, code {
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background-color: #ecf0f3;
color: #222;
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}
pre, tt, code {
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font-family: 'Consolas', 'Menlo', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace;
font-size: 0.9em;
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}
div.note {
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background-color: #EEE;
border: 1px solid #CCC;
margin: 10px 0;
padding: 0px 20px;
}
p.note-title {
font-weight: bolder;
padding: 0;
margin: 10px 0 0 0;
}
div.note > p.last {
margin: 5px 0 10px 0;
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}
< / style >
< / head >
< body >
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< p > A simulator to experiment with different backup schedules and prune options.< / p >
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< h3 > Simulation Options< / h3 >
< h4 > Time Range< / h4 >
< p > A backup job scenario is simulated for a < code > Duration< / code > in weeks, ending with the
configurable < code > End Date< / code > and < code > End Time< / code > . By default, 15 weeks are simulated,
ending with the current date and time.< / p >
< h4 > Schedule< / h4 >
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< p > Select weekdays with the combobox and input hour and minute
specification separated by a colon, i.e. < code > HOUR:MINUTE< / code > . Each of
< code > HOUR< / code > and < code > MINUTE< / code > can be either a single value or
one of the following:< / p >
< ul class = "simple" >
< li > a comma-separated list: e.g., < code > 01,02,03< / code > < / li >
< li > a range: e.g., < code > 01..10< / code > < / li >
< li > a repetition: e.g, < code > 05/10< / code > (means starting at < code > 5< / code > every < code > 10< / code > )< / li >
< li > a combination of the above: e.g., < code > 01,05..10,12/02< / code > < / li >
< li > a < code > *< / code > for every possible value< / li >
< / ul >
< h3 > Pruning< / h3 >
< p > Prune lets you systematically delete older backups, retaining backups for
the last given number of time intervals. The following retention options are
available:< / p >
< dl class = "docutils" >
< dt > < code class = "docutils literal notranslate" > < span class = "pre" > keep-last< / span > < span class = "pre" > < N> < / span > < / code > < / dt >
< dd > Keep the last < code class = "docutils literal notranslate" > < span class = "pre" > < N> < / span > < / code > backup snapshots.< / dd >
< dt > < code class = "docutils literal notranslate" > < span class = "pre" > keep-hourly< / span > < span class = "pre" > < N> < / span > < / code > < / dt >
< dd > Keep backups for the last < code class = "docutils literal notranslate" > < span class = "pre" > < N> < / span > < / code > hours. If there is more than one
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backup for a single hour, only the latest is kept. Hours without backups do not count.< / dd >
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< dt > < code class = "docutils literal notranslate" > < span class = "pre" > keep-daily< / span > < span class = "pre" > < N> < / span > < / code > < / dt >
< dd > Keep backups for the last < code class = "docutils literal notranslate" > < span class = "pre" > < N> < / span > < / code > days. If there is more than one
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backup for a single day, only the latest is kept. Days without backups do not count.< / dd >
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< dt > < code class = "docutils literal notranslate" > < span class = "pre" > keep-weekly< / span > < span class = "pre" > < N> < / span > < / code > < / dt >
< dd > Keep backups for the last < code class = "docutils literal notranslate" > < span class = "pre" > < N> < / span > < / code > weeks. If there is more than one
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backup for a single week, only the latest is kept. Weeks without backups do not count.
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< div class = "last admonition note" >
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< p class = "note-title" > Note:< / p >
< p class = "last" > Weeks start on Monday and end on Sunday. The software
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uses the < a class = "reference external" href = "https://en.wikipedia.org/wiki/ISO_week_date" > ISO week date< / a > system and handles weeks at
the end of the year correctly.< / p >
< / div >
< / dd >
< dt > < code class = "docutils literal notranslate" > < span class = "pre" > keep-monthly< / span > < span class = "pre" > < N> < / span > < / code > < / dt >
< dd > Keep backups for the last < code class = "docutils literal notranslate" > < span class = "pre" > < N> < / span > < / code > months. If there is more than one
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backup for a single month, only the latest is kept. Months without backups do not count.< / dd >
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< dt > < code class = "docutils literal notranslate" > < span class = "pre" > keep-yearly< / span > < span class = "pre" > < N> < / span > < / code > < / dt >
< dd > Keep backups for the last < code class = "docutils literal notranslate" > < span class = "pre" > < N> < / span > < / code > years. If there is more than one
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backup for a single year, only the latest is kept. Years without backups do not count.< / dd >
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< / dl >
< p > The retention options are processed in the order given above. Each option
only covers backups within its time period. The next option does not take care
of already covered backups. It will only consider older backups.< / p >
< p > For example, in a week covered by < code > keep-weekly< / code > , one backup is
kept while all others are removed; < code > keep-monthly< / code > then does not
consider backups from that week anymore, even if part of the week is part of
an earlier month.< / p >
< / body >
< / html >
