SQL Layer Mem KV We get SQL and transaction! But it is a toy. Persistent Storage SQL Layer GolevelDB MySQL Protocol Protocol Layer SQL Layer GolevelDB Pluggable storage engine SQL Layer MemKV MemKV Protocol Layer KV Interface GolevelDB RocksDB BoltDB Storage Layer Better SQL Layer • MySQL Protocol interface • More DDL/DML • More Data Types • Simple Planner SQL Layer KV Engine Protocol Protocol Layer KV API We get another MySQL. But it is much weaker. Distributed Storage Engine SQL Layer HBase Protocol Layer KV API Operator Pushdown SQL Layer Hbase Protocol Layer KV API Coprocessor

enables you to scale out or scale in the computing or storage capacity separately. The computing layer supports a maximum of 512 nodes, each node supports a maximum of 1,000 concurrencies, and the maximum showing the size of the backup and restore data when backing up and restoring data in the SQL logical layer #27247 – Improve the default collection logic of ANALYZE when tidb_analyze_version is 2, which accelerates Experimental Experimental Experimental 55 2.3.9 Security Security 5.3 5.2 5.1 5.0 4.0 Transparent layer security (TLS) Y Y Y Y Y Encryption at rest (TDE) Y Y Y Y Y Role-based authentication (RBAC) Y Y

enables you to scale out or scale in the computing or storage capacity separately. The computing layer supports a maximum of 512 nodes, each node supports a maximum of 1,000 concurrencies, and the maximum 5.2, to improve system security, it is recommended (but not manda- tory) to encrypt the transport layer for connections from clients. TiDB provides the Auto TLS feature to automatically configure and enable of RocksDB compaction accumulates, flow control is per- formed at the TiKV scheduler layer instead of the RocksDB layer, to avoid the following issues: – Raftstore is stuck, which is caused by RocksDB write

enables you to scale out or scale in the computing or storage capacity separately. The computing layer supports a maximum of 512 nodes, each node supports a maximum of 1,000 concurrencies, and the maximum performance �→ .tcp-no �→ -delay Newly added Determines whether to enable TCP_NODELAY at the TCP layer. The default value is true, which means TCP_NODELAY is enabled. TiDB con- figuration file performance Experimental Experimental Experimental Experimental 2.3.9 Security Security 5.2 5.1 5.0 4.0 Transparent layer security (TLS) Y Y Y Y Encryption at rest (TDE) Y Y Y Y Role-based authentication (RBAC) Y Y Y Y

storage architecture, enabling easy scaling of computing or storage capacity separately. The computing layer supports a maximum of 512 nodes, each node sup- ports a maximum of 1,000 concurrencies, and the maximum N N N N N N N 2.3.9 Security Security 7.6 7.5 7.1 6.5 6.1 5.4 5.3 5.2 5.1 5.0 4.0 Transparent layer security (TLS) Y Y Y Y Y Y Y Y Y Y Y Encryption at rest (TDE) Y Y Y Y Y Y Y Y Y Y Y Role-based authentication SQL functions to move the calculation of defaults out of the application layer, thus saving resources of the application layer. The resources consumed by the calculation do not disappear and are moved

enables you to scale out or scale in the computing or storage capacity separately. The computing layer supports a maximum of 512 nodes, each node supports a maximum of 1,000 concurrencies, and the maximum during the upgrade process #5698 @HunDunDM • TiFlash • Fix the issue that column files in the delta layer cannot be compacted after restart- ing TiFlash #6159 @lidezhu • Fix the issue that TiFlash File Open statistics E N N N N N N N N 2.3.9 Security Security 6.5 6.1 5.4 5.3 5.2 5.1 5.0 4.0 Transparent layer security (TLS) Y Y Y Y Y Y Y Y Encryption at rest (TDE) Y Y Y Y Y Y Y Y Role-based authentication

storage architecture, enabling easy scaling of computing or storage capacity separately. The computing layer supports a maximum of 512 nodes, each node sup- ports a maximum of 1,000 concurrencies, and the maximum N N N N N N N N N 2.3.9 Security Security 7.5 7.1 6.5 6.1 5.4 5.3 5.2 5.1 5.0 4.0 Transparent layer security (TLS) Y Y Y Y Y Y Y Y Y Y Encryption at rest (TDE) Y Y Y Y Y Y Y Y Y Y Role-based authentication SQL functions to move the calculation of defaults out of the application layer, thus saving resources of the application layer. The resources consumed by the calculation do not disappear and are moved

storage architecture, enabling easy scaling of computing or storage capacity separately. The computing layer supports a maximum of 512 nodes, each node sup- ports a maximum of 1,000 concurrencies, and the maximum N N N N N 2.3.9 Security Security 8.4 8.3 8.2 8.1 7.5 7.1 6.5 6.1 5.4 5.3 5.2 5.1 Transparent layer security (TLS) Y Y Y Y Y Y Y Y Y Y Y Y Encryption at rest (TDE) Y Y Y Y Y Y Y Y Y Y Y Y Role-based SQL functions to move the calculation of defaults out of the application layer, thus saving resources of the application layer. The resources consumed by the calculation do not disappear and are moved

storage architecture, enabling easy scaling of computing or storage capacity separately. The computing layer supports a maximum of 512 nodes, each node sup- ports a maximum of 1,000 concurrencies, and the maximum N N N N N 2.3.9 Security Security 8.4 8.3 8.2 8.1 7.5 7.1 6.5 6.1 5.4 5.3 5.2 5.1 Transparent layer security (TLS) Y Y Y Y Y Y Y Y Y Y Y Y Encryption at rest (TDE) Y Y Y Y Y Y Y Y Y Y Y Y Role-based SQL functions to move the calculation of defaults out of the application layer, thus saving resources of the application layer. The resources consumed by the calculation do not disappear and are moved

storage architecture, enabling easy scaling of computing or storage capacity separately. The computing layer supports a maximum of 512 nodes, each node sup- ports a maximum of 1,000 concurrencies, and the maximum tion E N N N N N N N N 2.3.9 Security Security 7.1 6.5 6.1 5.4 5.3 5.2 5.1 5.0 4.0 Transparent layer security (TLS) Y Y Y Y Y Y Y Y Y Encryption at rest (TDE) Y Y Y Y Y Y Y Y Y Role-based authentication SQL functions to move the calculation of defaults out of the application layer, thus saving resources of the application layer. The resources consumed by the calculation do not disappear and are moved