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Lee Hinman 4a08928c47
[7.x] Add index.routing.allocation.include._tier_preference setting (#62589) (#62667) 
This commit adds the `index.routing.allocation.prefer._tier` setting to the
`DataTierAllocationDecider`. This special-purpose allocation setting lets a user specify a
preference-based list of tiers for an index to be assigned to. For example, if the setting were set
to:

```
"index.routing.allocation.prefer._tier": "data_hot,data_warm,data_content"
```

If the cluster contains any nodes with the `data_hot` role, the decider will only allow them to be
allocated on the `data_hot` node(s). If there are no `data_hot` nodes, but there are `data_warm` and
`data_content` nodes, then the index will be allowed to be allocated on `data_warm` nodes.

This allows us to specify an index's preference for tier(s) without causing the index to be
unassigned if no nodes of a preferred tier are available.

Subsequent work will change the ILM migration to make additional use of this setting.

Relates to #60848
 		2020-09-18 15:41:36 -06:00
..
dev-tools
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docs [7.x] Fix projects that failed to build within Intellij (#62258) (#62408) 2020-09-17 17:45:12 -05:00
license-tools Replace immediate task creations by using task avoidance api (#60071) (#60504) 2020-07-31 13:09:04 +02:00
plugin [7.x] Add index.routing.allocation.include._tier_preference setting (#62589) (#62667) 2020-09-18 15:41:36 -06:00
qa [7.x] Fix projects that failed to build within Intellij (#62258) (#62408) 2020-09-17 17:45:12 -05:00
snapshot-tool Enforce fail on deprecated gradle usage (7.x backport) (#59758) 2020-07-20 08:52:30 +02:00
test Disable composePull task on idp-fixture project due to error (#62510) 2020-09-17 08:55:47 -07:00
transport-client Replace compile configuration usage with api (7.x backport) (#58721) 2020-06-30 15:57:41 +02:00
NOTICE.txt
…
README.md
…
build.gradle Replace immediate task creations by using task avoidance api (#60071) (#60504) 2020-07-31 13:09:04 +02:00

README.md

Elastic License Functionality

This directory tree contains files subject to the Elastic License. The files subject to the Elastic License are grouped in this directory to clearly separate them from files licensed under the Apache License 2.0.