Redis Server: SYNC

Redis SYNC Command

Redis SYNC command is used to sync slave to master.

Here are some common uses and scenarios for the "SYNC" command:

• Replication Initialization: Initiates the process of synchronizing data between a master and a replica (slave) server, ensuring the replica has an up-to-date copy of the master’s dataset.
• Data Transfer: Facilitates the transfer of the current dataset from the master to the replica during replication setup or when a replica reconnects after a failure.
• Consistency Restoration: Helps restore consistency between master and replica servers by initiating a full data synchronization.
• Testing: Useful for testing replication and failover scenarios by manually triggering data synchronization.

Syntax:

SYNC

Available since

1.0.0.

Return Value

Simple string reply

Return Value Type

String

Example: Redis SYNC

redis 127.0.0.1:6379> SYNC 
Entering slave output mode...  (press Ctrl-C to quit)
SYNC with master, discarding 18 bytes of bulk transfer...
SYNC done. Logging commands from master.
"PING"
"PING"
"PING"
"PING"

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