How to manually trigger flush execution to clean the data under wal directory?

Question

I know that Apache IoTDB can use flush to clean the data under wal directory, and this flush execution can automatically be operated by the system. I want to know how often this flush execution is operated, and can IoTDB manually trigger wal data flush? If it can be manually triggered, which configuration should I set, or what command can I execute?

Answer 1

If you want to manually trigger the flush operation of wal directory in Apache IoTDB, you can execute start-cli.sh -e flush in the Cli tool of IoTDB. The automatic flush operation will be executed based on the size of wal directory. However, you can also set the timing of triggering flush operation by modifying the seq_memtable_flush_interval_in_ms and unseq_memtable_flush_interval_in_ms configuration in iotdb-common.properties directory. The default timing is 3 hours.