{笨方法学Elasticsearch}测试cluster.routing.allocation.disable_allocation

也可以使用下面的参数设置不迁移：

<span class="pln" style="color:#000000;">curl </span><span class="pun" style="color:#66660;">-</span><span class="pln" style="color:#000000;">XPUT localhost</span><span class="pun" style="color:#66660;">:</span><span class="lit" style="color:#06666;">9200</span><span class="pun" style="color:#66660;">/</span><span class="pln" style="color:#000000;">_cluster</span><span class="pun" style="color:#66660;">/</span><span class="pln" style="color:#000000;">settings </span><span class="pun" style="color:#66660;">-</span><span class="pln" style="color:#000000;">d </span><span class="str" style="color:#0880;">'{</span><span class="pln" style="color:#000000;"><br style="" />                </span><span class="str" style="color:#0880;">"transient"</span><span class="pln" style="color:#000000;"> </span><span class="pun" style="color:#66660;">:</span><span class="pln" style="color:#000000;"> </span><span class="pun" style="color:#66660;">{</span><span class="pln" style="color:#000000;"><br style="" />                    </span><span class="str" style="color:#0880;">"cluster.routing.allocation.enable"</span><span class="pln" style="color:#000000;"> </span><span class="pun" style="color:#66660;">:</span><span class="pln" style="color:#000000;"> </span><span class="str" style="color:#0880;">"none"</span><span class="pln" style="color:#000000;"><br style="" />                </span><span class="pun" style="color:#66660;">}</span><span class="pln" style="color:#000000;"><br style="" />        </span><span class="pun" style="color:#66660;">}</span><span class="str" style="color:#0880;">'</span>

<span class="pln" style="color:#000000;">curl </span><span class="pun" style="color:#66660;">-</span><span class="pln" style="color:#000000;">XPUT localhost</span><span class="pun" style="color:#66660;">:</span><span class="lit" style="color:#06666;">9200</span><span class="pun" style="color:#66660;">/</span><span class="pln" style="color:#000000;">_cluster</span><span class="pun" style="color:#66660;">/</span><span class="pln" style="color:#000000;">settings </span><span class="pun" style="color:#66660;">-</span><span class="pln" style="color:#000000;">d </span><span class="str" style="color:#0880;">'{</span><span class="pln" style="color:#000000;"><br style="" />                </span><span class="str" style="color:#0880;">"transient"</span><span class="pln" style="color:#000000;"> </span><span class="pun" style="color:#66660;">:</span><span class="pln" style="color:#000000;"> </span><span class="pun" style="color:#66660;">{</span><span class="pln" style="color:#000000;"><br style="" />                    </span><span class="str" style="color:#0880;">"cluster.routing.allocation.enable"</span><span class="pln" style="color:#000000;"> </span><span class="pun" style="color:#66660;">:</span><span class="pln" style="color:#000000;"> </span><span class="str" style="color:#0880;">"all"</span><span class="pln" style="color:#000000;"><br style="" />                </span><span class="pun" style="color:#66660;">}</span><span class="pln" style="color:#000000;"><br style="" />        </span><span class="pun" style="color:#66660;">}</span><span class="str" style="color:#0880;">'</span>

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cluster.routing.allocation.disable_allocation:

    字面理解就是不分配shard。由于Elasticsearch数据迁移的时候必然涉及shard的重新分配，所以这个配置是用来防止在重启节点时，ES的数据发生来回的迁移。

具体测试：

1. 设置不迁移

curl -XPUT localhost:9200/_cluster/settings -d'{"transient":{"cluster.routing.allocation.disable_allocation":true}}'

 

2. 关闭节点nvlkv14之前

 

3. 关闭节点nvlkv14之后，可以看出没有做数据迁移

 

 

4. 重启几点nvlkv14之后，没有恢复数据

 

5. 设置迁移

curl -XPUTlocalhost:9200/_cluster/settings -d'{"transient":{"cluster.routing.allocation.disable_allocation":false}}'

数据恢复跟之前的分布式完全一样的

 

6. 没有设置不能迁移，集体重启之后，数据恢复跟重启之前一样