25.6.17.58 The ndbinfo table_fragments Table

The table_fragments table provides information about the fragmentation, partitioning, distribution, and (internal) replication of NDB tables.

The table_fragments table contains the following columns:

• node_id

  Node ID (DIH master)

• table_id

  Table ID

• partition_id

  Partition ID

• fragment_id

  Fragment ID (same as partition ID unless table is fully replicated)

• partition_order

  Order of fragment in partition

• log_part_id

  Log part ID of fragment

• no_of_replicas

  Number of fragment replicas

• current_primary

  Current primary node ID

• preferred_primary

  Preferred primary node ID

• current_first_backup

  Current first backup node ID

• current_second_backup

  Current second backup node ID

• current_third_backup

  Current third backup node ID

• num_alive_replicas

  Current number of live fragment replicas

• num_dead_replicas

  Current number of dead fragment replicas

• num_lcp_replicas

  Number of fragment replicas remaining to be checkpointed