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  • About TiDB
    • TiDB Introduction
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      • The TiDB Server
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      • The TiDB System Variables
      • The Proprietary System Variables and Syntax in TiDB
      • The TiDB Server Logs
      • The TiDB Access Privilege System
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      • Use Encrypted Connections
    • SQL Optimization
      • Understand the Query Execution Plan
      • Introduction to Statistics
    • Language Structure
      • Literal Values
      • Schema Object Names
      • Keywords and Reserved Words
      • User-Defined Variables
      • Expression Syntax
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    • Globalization
      • Character Set Support
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      • Time Zone Support
    • Data Types
      • Numeric Types
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    • Functions and Operators
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    • SQL Statement Syntax
      • Data Definition Statements
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      • Transactions
      • Database Administration Statements
      • Prepared SQL Statement Syntax
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      • TiDB SQL Syntax Diagram
    • JSON Functions and Generated Column
    • Connectors and APIs
    • TiDB Transaction Isolation Levels
    • Error Codes and Troubleshooting
    • Compatibility with MySQL
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    • Advanced Usage
      • Read Data From History Versions
      • Garbage Collection (GC)
  • TiDB Operations Guide
    • Hardware and Software Requirements
    • Deploy
      • Ansible Deployment (Recommended)
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      • Cross-Region Deployment
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    • Configure
      • Configuration Flags
      • Configuration File Description
      • Modify Component Configuration Using Ansible
      • Enable TLS Authentication
      • Generate Self-signed Certificates
    • Monitor
      • Overview of the Monitoring Framework
      • Key Metrics
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    • Scale
      • Scale a TiDB Cluster
      • Scale Using Ansible
    • Upgrade
      • Upgrade the Component Version
      • TiDB 2.0 Upgrade Guide
    • Tune Performance
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  • TiKV Documentation
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  • Releases
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TiDB RC1 Release Notes

On December 23, 2016, TiDB RC1 is released. See the following updates in this release:

TiKV:

  • The write speed has been improved.
  • The disk space usage is reduced.
  • Hundreds of TBs of data can be supported.
  • The stability is improved and TiKV can support a cluster with 200 nodes.
  • Supports the Raw KV API and the Golang client.

Placement Driver (PD): + The scheduling strategy framework is optimized and now the strategy is more flexible and reasonable. + The support for label is added to support Cross Data Center scheduling. + PD Controller is provided to operate the PD cluster more easily.

TiDB:

  • The following features are added or improved in the SQL query optimizer:
    • Eager aggregation
    • More detailed EXPLAIN information
    • Parallelization of the UNION operator
    • Optimization of the subquery performance
    • Optimization of the conditional push-down
    • Optimization of the Cost Based Optimizer (CBO) framework
  • The implementation of the time related data types are refactored to improve the compatibility with MySQL.
  • More built-in functions in MySQL are supported.
  • The speed of the add index statement is enhanced.
  • The following statements are supported:
    • Use the CHANGE COLUMN statement to change the name of a column.
    • Use MODIFY COLUMN and CHANGE COLUMN of the ALTER TABLE statement for some of the column type transfer.

New tools:

  • Loader is added to be compatible with the mydumper data format in Percona and provides the following functions:
    • Multi-thread import
    • Retry if error occurs
    • Breakpoint resume
    • Targeted optimization for TiDB
  • The tool for one-click deployment is added.
"TiDB RC1 Release Notes" was last updated Jan 19 2018: Add the release notes for 1.1 alpha (#329) (854724f)
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