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1a23417aeb
This commit overhauls the documentation of discovery and cluster coordination, removing mention of the Zen Discovery module and replacing it with docs for the new cluster coordination mechanism introduced in 7.0. Relates #32006
28 lines
1.1 KiB
Plaintext
28 lines
1.1 KiB
Plaintext
[float]
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[[breaking_70_cluster_changes]]
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=== Cluster changes
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[float]
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==== `:` is no longer allowed in cluster name
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Due to cross-cluster search using `:` to separate a cluster and index name,
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cluster names may no longer contain `:`.
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[float]
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==== New default for `wait_for_active_shards` parameter of the open index command
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The default value for the `wait_for_active_shards` parameter of the open index API
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is changed from 0 to 1, which means that the command will now by default wait for all
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primary shards of the opened index to be allocated.
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[float]
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==== Shard preferences `_primary`, `_primary_first`, `_replica`, and `_replica_first` are removed
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These shard preferences are removed in favour of the `_prefer_nodes` and `_only_nodes` preferences.
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[float]
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==== Cluster-wide shard soft limit
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Clusters now have soft limits on the total number of open shards in the cluster
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based on the number of nodes and the `cluster.max_shards_per_node` cluster
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setting, to prevent accidental operations that would destabilize the cluster.
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More information can be found in the <<misc-cluster,documentation for that setting>>.
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