在Elasticsearch中，直接重命名索引并不是一个直接支持的操作。但是，可以通过以下步骤间接实现索引的重命名：
-
创建新索引：首先，你需要创建一个新的索引，这个索引将是你原索引的新名字。
-
复制数据：使用Reindex API将数据从旧索引复制到新索引。
-
删除旧索引：确认新索引创建成功并验证数据完整后，可以安全地删除旧索引。
-
更新应用配置：最后，确保你的应用程序或其他依赖于这个索引的服务指向新的索引名称。
以下是如何使用Curl命令执行上述步骤的示例：
创建新索引：
Bash
PUT /new_index_name
{
"settings": {
"number_of_shards": 1,
"number_of_replicas": 0
}
}复制数据：
Bash
POST _reindex
{
"source": {
"index": "old_index_name"
},
"dest": {
"index": "new_index_name"
}
}删除旧索引：
Bash
1DELETE /old_index_name请注意，这些操作应该在低峰时段执行，以减少对生产环境的影响。同时，在删除旧索引之前，一定要确保新索引中的数据完整无误。
此外，Elasticsearch 7.10及以上版本提供了_migrate API，可以更方便地进行索引的重命名和迁移，但具体的使用方法和注意事项需要参考官方文档。不过，截至我最后一次更新知识（2023年初），直接的索引重命名API并未在文档中提及，因此以上方法仍然适用。
-----------------------------------------------------------------
备份流程
PUT /content_erp_nlp_help_back
{
"settings": {
"number_of_shards": 1,
"number_of_replicas": 0
}
}
POST _reindex
{
"source": {
"index": "content_erp_nlp_help"
},
"dest": {
"index": "content_erp_nlp_help_back"
}
}
DELETE /content_erp_nlp_help
DELETE /content_erp_nlp_help
PUT /content_erp_nlp_help
PUT _template/content_erp_nlp_help
{
"index_patterns": [
"content_vector*"
],
"settings": {
"analysis": {
"analyzer": {
"my_ik_analyzer": {
"type": "ik_smart"
}
}
},
"number_of_shards": 1
},
"mappings": {
"properties": {
"id": {
"type": "long"
},
"content": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"content_vector": {
"type": "dense_vector",
"similarity": "cosine",
"index": true,
"dims": 768,
"element_type": "float",
"index_options": {
"type": "hnsw",
"m": 16,
"ef_construction": 128
}
},
"content_answer": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"title": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"param": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"type": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"questionId": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"createTime": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"updateTime": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"hitCount": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"answerPattern": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"nearQuestionVOList": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"questionEnclosureVOList": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"questionRelationVOList": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
},
"rmsRoutingAnswerVos": {
"type": "text",
"analyzer": "ik_max_word",
"search_analyzer": "ik_smart"
}
}
}
}
POST _reindex
{
"source": {
"index": "content_erp_nlp_help_test"
},
"dest": {
"index": "content_erp_nlp_help"
}
}
