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TiDB 1.0 is released with a focus on MySQL compatibility, SQL optimization, stability, and performance. It includes enhancements to the SQL query optimizer, internal data format optimization, and support for various operators. PD now supports read flow based balancing and setting store weight. TiKV has improved coprocessor support and performance, and added a Debug API. Special thanks to enterprises, open source software, and individual contributors for their support.
TiDB 1.0 Release Notes
On October 16, 2017, TiDB 1.0 is now released! This release is focused on MySQL compatibility, SQL optimization, stability, and performance.
TiDB
The SQL query optimizer:
Adjust the cost model
Analyze pushdown
Function signature pushdown
Optimize the internal data format to reduce the interim data size
Enhance the MySQL compatibility
Support the NO_SQL_CACHE syntax and limit the cache usage in the storage engine
Refactor the Hash Aggregator operator to reduce the memory usage
Support the Stream Aggregator operator
PD
Support read flow based balancing
Support setting the Store weight and weight based balancing
TiKV
Coprocessor now supports more pushdown functions
Support pushing down the sampling operation
Support manually triggering data compact to collect space quickly
Improve the performance and stability
Add a Debug API for debugging
TiSpark Beta Release:
Support configuration framework
Support ThriftSever/JDBC and Spark SQL
Acknowledgement
Special thanks to the following enterprises and teams
Archon
Mobike
Samsung Electronics
SpeedyCloud
Tencent Cloud
UCloud
Thanks to the open source software and services from the following organizations and individuals