In MapR DB, which is the default replication factor? Is it Master-Slave? or Multi Master?
Table replication is actually different from the standard "container replication" that happens automatically as part of MapR-FS: so MapR-DB actually benefits from both container replication and table replication. So it's a bit unfortunate that the same term is used for both.
Container Replication: MapR-DB takes advantage of the built-in features of MapR-FS, which includes container replication. Table data is stored in containers (just like other types of data are stored in containers), and MapR-FS automatically replicates these containers. By default there are 3 copies (the master, and 2 replicas). Containers are always replicated from the master to the replicas, and all copies will always be identical. Keep in mind that there could be pieces of a single table located in many different containers. So container replication isn't creating a copy of a table, or a volume -- it's just making sure your data is always available.
Table Replication: MapR-DB lets you set up table replication, which is in addition to container replication. Kind of like mirrors can be used to create copies of volumes, table replication can be used to create copies of tables. There isn't a default type - you have to specifically set up table replicas as either master-slave or multi-master.
You can find more information on table replication, and how to set it up, in the documentation: Replicating MapR-DB Tables
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