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Target customers: users of Alibaba Cloud Elasticsearch V6.7. Features released: The kernel of the latest minor version provides the following features: 1. Physical replication: improves the write performance of indexes that have replica shards. 2. Pruning for time series indexes: improves the query performance of indexes that contain time series fields. 3. Improved deduplication for primary keys of documents during queries: increases the write performance of documents that contain primary keys by 10%. 4. Support for finite-state transducers (FSTs) that do not occupy heap memory, and support for up to 20 TiB of storage space per node.