Which Database Mode is My Database Using?

Jim_Knicely

You can run Vertica in either Eon Mode or Enterprise Mode. The primary difference between Eon and Enterprise Modes is where they store data. Eon Mode stores data in a shared object store called communal storage, while Enterprise Mode stores data across the filesystems of the database nodes.

If you are working with a new database that you didn’t create, you can can determine which Mode it is using by querying the V_CATALOG.STORAGE_LOCATIONS or the V_CATALOG.SHARDS system table.

Examples:

dbadmin=> SELECT CASE COUNT(*)
dbadmin->          WHEN 0 THEN 'Enterprise'
dbadmin->          ELSE 'Eon'
dbadmin->        END AS database_mode
dbadmin->   FROM v_catalog.storage_locations
dbadmin->  WHERE sharing_type = 'COMMUNAL';
 database_mode
---------------
 Eon
(1 row)

SELECT CASE COUNT(*)
         WHEN 0 THEN 'Enterprise'
         ELSE 'Eon'
       END AS database_mode
  FROM v_catalog.shards;
 database_mode
---------------
 Eon
(1 row)

Helpful Links:
https://www.vertica.com/docs/9.3.x/HTML/Content/Authoring/Eon/VerticaArchitectureEonVsEnterpriseMode.htm
https://www.vertica.com/docs/9.3.x/HTML/Content/Authoring/Eon/ComparingEonandEnterpriseModes.htm
https://www.vertica.com/docs/9.3.x/HTML/Content/Authoring/SQLReferenceManual/SystemTables/CATALOG/STORAGE_LOCATIONS.htm
https://www.vertica.com/docs/9.3.x/HTML/Content/Authoring/SQLReferenceManual/SystemTables/CATALOG/SHARDS.htm

Have Fun!

Abhishek_Rana

There is an easy way to look for this by checking admintools.conf of a node for that database.
In [Database:<>] section of this file, you will have "is_eon_mode = True" for EON db.
Other information reagrding EON setup is also there like below:
depot_base_dir = /home/dbadmin
depot_size = 307200K
communal_storage_url = s3://abhibucket/
num_shards = 3