admin -- Perform administrative operations on the server
p4 admin checkpoint [ -z ] [ prefix ]
p4 admin stop
'p4 admin checkpoint' causes the server to take a checkpoint and
to copy the journal to a numbered journal file. It is equivalent
to 'p4d -jc'.
The -z flag causes the checkpoint and saved journal to be saved in
compressed (gzip) format, with the '.gz' suffix on the file names.
If a prefix is specified, the files will be named prefix.ckp.n and
prefix.jnl.n respectively, where n is a sequence number. Without
prefix, the default filenames checkpoint.n and journal.n will be
used.
p4 admin stop stops the server, terminating any requests
currently running. It first locks the database to ensure that
no updates are taking place, but otherwise is brutal as it does
not wait for users to finish what they are doing.
(For NT users, this will work whether you are running Perforce
as a server or a service.)