31.7. Architecture

31.7.1. Initial Snapshot

+31.7. Architecture

31.7. Architecture
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31.7. Architecture

31.7.1. Initial Snapshot

Logical replication starts by copying a snapshot of the data on the publisher database. Once that is done, changes on the publisher are sent to the subscriber as they occur in real time. The subscriber applies data @@ -12,7 +12,8 @@ implemented by “walsender” and “apply” processes. The walsender process starts logical decoding (described in Chapter 49) of the WAL and loads the standard - logical decoding plugin (pgoutput). The plugin transforms the changes read + logical decoding output plugin (pgoutput). The plugin + transforms the changes read from WAL to the logical replication protocol (see Section 55.5) and filters the data according to the publication specification. The data is then continuously @@ -51,4 +52,4 @@ The publication publish parameter only affects what DML operations will be replicated. The initial data synchronization does not take this parameter into account when copying the existing table data. -

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31.6. Restrictions	Home	31.8. Monitoring

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31.6. Restrictions	Home	31.8. Monitoring