54 lines
1.6 KiB
Markdown
54 lines
1.6 KiB
Markdown
---
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{
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"title": "ALTER CLUSTER",
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"language": "en"
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}
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---
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<!--
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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"License"); you may not use this file except in compliance
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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KIND, either express or implied. See the License for the
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# ALTER CLUSTER
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## description
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This statement is used to update the logical cluster. Administrator privileges are required
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grammar
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ALTER CLUSTER cluster_name PROPERTIES ("key"="value", ...);
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1. Scaling, scaling (according to the number of be existing in the cluster, large is scaling, small is scaling), scaling for synchronous operation, scaling for asynchronous operation, through the state of backend can be known whether the scaling is completed.
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Proerties ("Instrume = Unum"= "3")
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Instancefn Microsoft Yahei
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## example
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1. Reduce the number of be of logical cluster test_cluster containing 3 be by 2.
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ALTER CLUSTER test_cluster PROPERTIES ("instance_num"="2");
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2. Expansion, increase the number of be of logical cluster test_cluster containing 3 be to 4
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ALTER CLUSTER test_cluster PROPERTIES ("instance_num"="4");
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## keyword
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ALTER,CLUSTER
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