Storage Group Rules
Storage groups are serviced by zero or more Storage Managers (SMs). For a storage group to be available, it must be serviced by at least one SM. The following rules apply to storage groups:
- A SM always services the UNPARTITIONED storage group. A SM may service zero or more specific (named) storage groups, added with the add storageGroup NuoDB Manager command.
- A SM that does not specify a specific storage group will still service the
UNPARTITIONED storage group.
- A Snapshot Storage Manager (SSM) must service all storage groups.
- In addition to associating a table with multiple storage groups, a table can be created and assigned to just one storage group.
- A storage group name can contain only alphanumeric characters and underscores (_). Storage group names are case insensitive.
Note: In a database with multiple storage groups, a SM may service more than one storage group (more than one logical partition has the same physical location) and a storage group may be serviced by more than one SM (for redundancy and availability).