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The MySQL Cluster API Developer Guide :: 6 MySQL Cluster Internals :: 6.4 NDB Kernel Blocks :: 6.4.17 The SUMA Block

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6.4 NDB Kernel Blocks
6.4.1 The BACKUP Block
6.4.2 The CMVMI Block
6.4.3 The DBACC Block
6.4.4 The DBDICT Block
6.4.5 The DBDIH Block
6.4.6 DBLQH Block
6.4.7 The DBTC Block
6.4.8 The DBTUP Block
6.4.9 DBTUX Block
6.4.10 The DBUTIL Block
6.4.11 The LGMAN Block
6.4.12 The NDBCNTR Block
6.4.13 The NDBFS Block
6.4.14 The PGMAN Block
6.4.15 The QMGR Block
6.4.16 The RESTORE Block
6.4.17 The SUMA Block
6.4.18 The TSMAN Block
6.4.19 The TRIX Block

6.4.17. The `SUMA` Block

The cluster subscription manager, which handles event logging and reporting functions. It also figures prominently in MySQL CLuster Replication. SUMA consists of the following files, found in the directory storage/ndb/src/kernel/blocks/suma/:

Suma.hpp. Defines the Suma class and interfaces for managing subscriptions and performing necessary communications with other SUMA (and other) blocks.
SumaInit.cpp. Performs initialization of DICT, DIH, and other interfaces
Suma.cpp. Implements subscription-handling routines.
Suma.txt. Contains a text-based diagram illustrating SUMA protocols.

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6.4.17. The SUMA Block

6.4.17. The `SUMA` Block