Your client application needs to write a row to a region that has, recently split. Where will the row
One of the daughter regions
The original region
The .META. table
*With a roughly uniform data distribution and growth, eventually all the regions in the table will
need to be split at the same time. Immediately following a split, compactions will run on the
daughter regions to rewrite their data into separate files. This causes a large amount of disk I/O
and network traffic.
*Splits run unaided on the RegionServer; i.e. the Master does not participate. The RegionServer
splits a region, offlines the split region and then adds the daughter regions to META, opens
daughters on the parent’s hosting RegionServer and then reports the split to the Master.