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P4 CLI Reference | 2025.1

# p4 failback

After a failover with target server The immediately upstream server for replica servers, edge servers, standby servers, proxies and brokers. See also 'upstream server' and 'central server'. participation, fail back to restore the previous role of that target server.

## Syntax

    p4 failback [-y] [ -w quiesce_wait ] [ -v verification_time ] [ failback_message ]

Syntax conventions

## Description

After a failover (see Failover in the P4 Server Administration Documentation) in which the target server participated, `p4 failback` can reestablish the relationship between the target server and the standby server to what it was prior to failover. See the prerequisites and procedure for Failback after failover in the P4 Server Administration Documentation.

## Options

`-y` | Perform the failback operation. Without this option, `p4 failback` merely reports what it would do. Carefully consider the report of what failback would do BEFORE you include the -y option and launch the operation. During the failback process, end-user clients cannot issue commands against the server.
-v | Specifies the verificationTime as a number of seconds prior to the launch of the failback command. The default value of 300 seconds means that any file content that was updated from 1 - 300 seconds prior to launch of failback will be verified. This is to ensure that this file content will be correct when the failback process completes on the new target server. The failback command proceeds as soon as it has determined that the new target server has received correct file content. The legal range is between 0 (no verification) and 43200 seconds (12 hours).
`-w` | The waiting period in seconds for commands in the target server to complete. At the end of this quiesceWait period, all user commands, regardless of their activity, will be stalled. If -w is not specified, the default quiesceWait value is 60 You can set the waiting period to any integer value between 0 (immediate) and 3600 seconds (1 hour). To cancel the failback during the quiesceWait period, press Ctrl-C
failbackMessage | The text to display to end-users during the failback operation when end-users attempt to start new commands on the target server. The default message is: Server currently in failback mode, try again after failback has completed The failbackMessage must be the final argument specified in the p4 failback command. For example, p4 failback -w 90 -v 500 -y The Perforce server is undergoing scheduled maintenance and quotation marks are not required.
`g-opts` | See Global options

## Usage notes

Can File Arguments Use Revision Specifier? | Can File Arguments Use Revision Range? | Minimal Access Level Required
--- | --- | ---
N/A | N/A | `super`

## Related commands

Fail over to a standby server | p4 failover
Failback options in the P4 Server Administration Documentation that are used in that Guide's procedure for Failback after failover in the P4 Server Administration Documentation. | `p4d -Fm` `p4d -Fs`

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