Commit d8e7d844 authored by Oleg Ponomarev's avatar Oleg Ponomarev Committed by Klaus Aehlig

Update hbal man page

Add description of the second common-failure location tag component
to the hbal manpage.
Signed-off-by: default avatarOleg Ponomarev <onponomarev@gmail.com>
Signed-off-by: default avatarKlaus Aehlig <aehlig@google.com>
Reviewed-by: default avatarKlaus Aehlig <aehlig@google.com>
parent 3daaae2f
......@@ -139,6 +139,8 @@ following components:
- standard deviation of the CPU load provided by MonD
- the count of instances with primary and secondary in the same failure
domain
- the count of instances sharing the same exclusion tags which primary
instances placed in the same failure domain
- the overall sum of dissatisfied desired locations among all cluster
instances
......@@ -277,9 +279,10 @@ cluster tags *htools:nlocation:a*, *htools:nlocation:b*, etc
This make make node tags of the form *a:\**, *b:\**, etc be considered
to have a common cause of failure.
Instances with primary and secondary node having a common cause of failure are
considered badly placed. While such placements are always allowed, they count
heavily towards the cluster score.
Instances with primary and secondary node having a common cause of failure and
instances sharing the same exclusion tag with primary nodes having a common
failure are considered badly placed. While such placements are always allowed,
they count heavily towards the cluster score.
OPTIONS
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