To obtain a list of the currently configured shards:

shell> trepctl shard -list
shard_id	master	critical
alpha     sales   true

The shard map information can also be captured and then edited to update existing configurations:

shell> trepctl shard -list>shard.map

To add a new shard map definition, either enter the information interactively:

shell> trepctl shard -insert 
Reading from standard input
...
1 new shard inserted

Or import from a file:

shell> trepctl shard -insert  < shard.map
Reading from standard input
1 new shard inserted

To update a definition:

shell> trepctl shard -update  < shard.map
Reading from standard input
1 shard updated

To delete a single shard definition, specify the shard name:

shell> trepctl shard -delete alpha