Bulk Operation

FLINK-19614 Increase the default value of data writing cache size (not configurable) for sort-merge blocking shuffle

FLINK-19614 Enrich error message of read buffer request timeout exception

FLINK-19614 Fix wrong if condition in BufferReaderWriterUtil#writeBuffers

FLINK-19614 Improve document and config description of sort-merge blocking shuffle

FLINK-19614 Use heap memory instead of direct memory as index entry cache for sort-merge shuffle

FLINK-19614 Replace the 4M data writing cache of sort-merge shuffle with writev system call

FLINK-19614 Use region file mechanism for shuffle data reading before we switch to managed memory

FLINK-19614 Optimize data broadcast for sort-merge shuffle

FLINK-19614 Use managed memory to avoid direct memory OOM error for sort-merge shuffle (introduce a separated buffer pool)

FLINK-19614 Implement shuffle data read scheduling for sort-merge blocking shuffle