And is there some metrics exported or way to verify what the leader counts is in each node overall as well as per table?
For multi-region installations, Google Cloud Spanner (https://cloud.google.com/spanner/docs/instances) has a notion of a “default leader” for performance reasons, and recommends
< Place the bulk of your read and write workloads in the default leader region. >. Does YugabyteDB have a similar notion and if so, how is this specified?
Tablet (shard) leaders in YugabyteDB are distributed as evenly as possible across
yb-tservernodes. This helps spread read/write workloads because tablet leaders are consulted for writes and reads.
Currently we expose tablet leader/followers on the yb-master UI. We can see the overall tablet counts on
While tablet specific leaders/followers for each table are displayed on the ui in
http://<any-tserver-ip>:9000/tablets url of each yb-tserver.
- Yes, YugabyteDB supports the ability to specify preferred zone/regions(s) for the leaders. This can be done with set_preferred_zones 1 command in yb-admin cli. As long nodes are alive and healthy all tablet leaders will reside in that region/zone.
@busybruner please see edited reply above