v.21.4Improvements
Introduce min_bytes_to_rebalance_partition_over_jbod setting for balanced JBOD disk assignments
Introduce a new merge tree setting min_bytes_to_rebalance_partition_over_jbod which allows assigning new parts to different disks of a JBOD volume in a balanced way. #16481 (Amos Bird).Why it matters
This feature addresses the need to distribute data parts more evenly across multiple disks in a JBOD setup, preventing uneven disk usage and improving overall storage balance and performance.How to use it
Set themin_bytes_to_rebalance_partition_over_jbod setting in the MergeTree table configuration to specify the minimum size threshold of data parts that triggers rebalancing across JBOD disks.