OpenEdge Getting Started: Multi-tenancy Overview - Product ...

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Chapter 1: Introducing multi-tenancy What is a multi-tenant group? A multi-tenant group, or simply a group, is a mechanism for allowing multiple tenants to access the same data in a single multi-tenant table. Each group is defined for one specific table. There can be multiple groups defined for the same table, and multiple tables that are accessed by different multi-tenant groups, but a specific tenant group applies only to one multi-tenant table. The data for a multi-tenant group is stored in the same way as it is for any multi-tenant table instance. A group has a partition for each object of the multi-tenant table instance, for the table data, indexes, and LOBs associated with that table definition. When data is added to a tenant group, that data is stored in the group’s partitions, and shared by all tenants who are members of the group. This is different from the way tenant data is handled when there is no group, since the data is shared among the tenants of the group rather than being private to an individual tenant. The stored data is owned by the group, and not by any individual tenant or tenants. Consequently, even if there are no tenants associated with a group, any data that had been stored in the group’s table partitions continues to exist in the database until the group itself is removed. While a tenant can belong to only one group for any given table, a table can have multiple groups defined simultaneously. A tenant can belong to zero or one group for each table. A tenant can be added to a group with the Database Administration Console, provided that the tenant does not have its own data currently allocated for the table where it intends to become a member of a group. If tenant partitions have been allocated for the table, then the partitions must be deleted before the tenant can join a group. Removing a tenant from a group automatically results in the tenant having its own partitions for that table, based on the defaults that are set in the tenant record and allocation setting. 40 OpenEdge Getting Started: Multi-tenancy Overview
Multi-tenant feature capabilities This chapter highlights the capabilities of the tools and processes supporting multi-tenancy, as discussed in the following sections: • Database Administration Console • Data Dictionary support for multi-tenancy • Database Administration • Database utilities • Auditing • Progress Developer’s studio for OpenEdge support Programming capabilities associated with multi-tenancy are discussed in later chapters. For ABL, see Chapter 3, “Multi-tenancy and ABL,” and for OpenEdge SQL, see Chapter 4, “Multi-tenancy and OpenEdge SQL.” OpenEdge Getting Started: Multi-tenancy Overview 41 2
Page 1 and 2: ® ® PROGRESS® OPENEDGE® OpenEdg
Page 3 and 4: Contents Preface . . . . . . . . .
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Page 7 and 8: Using this manual Preface OpenEdge
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Page 13 and 14: OpenEdge messages Preface OpenEdge
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Page 31 and 32: Introducing multi-tenancy This chap
Page 33 and 34: What are the advantages of multi-te
Page 35 and 36: How does data access work? How does
Page 37 and 38: How does data access work? Figure 2
Page 39: How does data access work? The numb
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Page 47 and 48: Database utilities Database utiliti
Page 49 and 50: Auditing Auditing For multi-tenant
Page 51 and 52: Progress Developer’s studio for O
Page 53 and 54: Multi-tenancy and ABL Support for m
Page 55 and 56: ABL Support If you already have dom
Page 57 and 58: Super-tenant data updates ABL Suppo
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Page 65 and 66: DBA use cases DBA use cases The fol
Page 67 and 68: Alter a tenant To alter a tenant, r
Page 69 and 70: Super tenant use cases Super tenant
Page 71 and 72: Update rows of a tenant partition S
Page 73 and 74: SQL utility use cases Writing schem
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Page 77 and 78: Glossary of terms This chapter prov
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Page 81 and 82: Table types Tenants Table types Use

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