补充 Elasticsearch 磁盘水位案例

[shiwenxin123]

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??????????? Elasticsearch ?????????? Elasticsearch ????????????????????????

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• ?? docs/cases/ELASTICSEARCH-DISK-WATERMARK.md
• ?? docs/cases/README.md
• ?? docs/manual/middleware/POSTGRES-MONGO-ELASTIC.md

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• flood stage watermark
• read_only_allow_delete
• shard allocation
• ?????????

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• scripts/check-docs.ps1 ??