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docs: miscellaneous cleanup

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Ian Barwick
2017-11-17 09:20:43 +09:00
parent bdb82d3aba
commit 060b746743
7 changed files with 13 additions and 14 deletions
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doc/repmgrd-witness-server.sgml
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@@ -9,12 +9,12 @@
In a situation caused e.g. by a network interruption between two
data centres, it's important to avoid a "split-brain" situation where
both sides of the network assume they are the active segment and the
side without an active master unilaterally promotes one of its standbys.
side without an active primary unilaterally promotes one of its standbys.
</para>
<para>
To prevent this situation happening, it's essential to ensure that one
network segment has a "voting majority", so other segments will know
they're in the minority and not attempt to promote a new master. Where
they're in the minority and not attempt to promote a new primary. Where
an odd number of servers exists, this is not an issue. However, if each
network has an even number of nodes, it's necessary to provide some way
of ensuring a majority, which is where the witness server becomes useful.