Shared checkpoints create a group (per checkpoint table) to identify replicas and to pick the active replica.
All groups use a single checkpoint (SAFplus::Checkpoint Group::mGroupCkpt). Groups store <????> in this structure because <????>.
But groups can be configured to use an in memory database instead of a checkpoint. Using this mode has the following features, limitations, and effects:
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To avoid circular initialization dependencies, Checkpoints initialize themselves with in-memory groups.