USAGE for load_checkpoint.sh v2.9.6:

load_checkpoint.sh <checkpoint> [<jnl.1> [<jnl.2> ...]] [-R|-F <SafetyFactor>] [-i <instance>] [-s <ServerID>] [-t <Type>] [-verify {default|"Verify Options"} [-delay <delay>]] [-c] [-l] [-r] [-b] [-y] [-L <log>] [-si] [-v<n>] [-d|-D]

or

load_checkpoint.sh [-h|-man]


DESCRIPTION:
	This script loads a specified checkpoint into /p4/N/root and /p4/N/offline_db,
	where 'N' is the SDP instance name.

	At the start of processing, preflight checks are done. Preflight checks
	include:
	* The specified checkpoint and corresponding *.md5 file must exist.
	* The specified checkpoint can be a file or a directory (for parallel
	checkpoint processing).
	* All journal files to replay (if any were specified) must exist.
	* The $P4ROOT/server.id file must exist, unless '-s' is specified.
	* If the $P4ROOT/server.id file exists and '-s' is specified, the values
	must match.
	* The $P4ROOT/license file must exist, unless '-l' is specified or if
	the replica type does not require a license.
	* Basic SDP structure and key files must exist.

  	If the preflight passes, the p4d_N service is shutdown, and also the
	p4broker_N service is shutdown if configured.

	If a P4LOG file exists, it is moved aside so there is a fresh p4d server
	log corresponding to operation after the checkpoint load.

	If a P4JOURNAL file exists, it is moved aside as the old journal data is
	no longer relevant after a checkpoint replay. (Exception: If the P4JOURNAL
	is speciffed in a list of journals to reply, then it is not moved aside).

	Next, any existing state* files in P4ROOT are removed.

	Next, any existing database files in P4ROOT are preserved and moved aside,
	unless '-R' is specified to remove them.

	Next, the specified checkpoint is loaded. Upon completion, the Helix Core
	server process, p4d_N, is started.

	If the server to be started is a replica, the serviceUser configured for
	the replica is logged into the P4TARGET server.  Any needed 'p4 trust' and
	'p4 login' commands are done to enable replication.

	Note that this part of the processing will fail if the correct super user
	password is not stored in the standard SDP password file,

	/p4/common/config/.p4passwd.p4_N.admin

	After starting the server, a local 'p4 trust' is done if needed, and then
	a 'p4login -service -v' and 'p4login -v'.

	By default, the p4d_N service is started, but the p4broker_N service is not.
	Specify '-b' to restart both services.

	Finally, the offline_db is rebuilt using the same specified checkpoint and
	journals.

ARGUMENTS AND OPTIONS:
 <checkpoint>
	Specify the path to the checkpoint file or directory to load. Exactly one
	checkpoint must be specified. If a checkpoint file is specified, a serial
	checkpoint replay will be done. If a checkpoint directory is specified,
	a parallel replay will be done using the individual files in the
	directory.

	For checkpoint files:

	The file may be a compressed or uncompressed checkpoint, and it may be a case
	sensitive or case-insensitive checkpoint.  The checkpoint file must have a
	corresponding *.md5 checksum file in the same directory, with one of two name
	variations: If the checkpoint file is /somewhere/foo.gz, the checksum file may
	be named /somewhere/foo.gz.md5 or /somewhere/foo.md5.

	For checkpoint directories:

	This option is required unless the '-latest' option is used.

 <jnl.1> [<jnl.2> ...]
	Specify the path to the one or more journal files to replay after the
	checkpoint, in the correct sequence order.

 -latest
	Specify this as an alternative to providing a specific checkpoint file or
	directory.  The script will then search for the latest *.md5 file in the
	$CHECKPOINTS directory (/p4/1/checkpoints), and use that to replay.  The most
	recent *.md5 file determines which checkpoint to load, be it a file or
	directory.

 -R	Specify '-R' to remove db.* files in P4ROOT rather than moving them aside.

	By default, databases are preserved for possible future for investigation.
 	A folder named 'MovedDBs.<datestamp>' is created under the P4ROOT directory,
	and databases are moved there.

	Keeping an extra copy of databases requires sufficient disk space to hold
	an extra copy of the db.* files.

	If -R specified, old databases in P4ROOT are removed, along with state*
	and other files, and the server.locks directory.

 -F <SafetyFactor>
	When replacing an existing set of db.* files, a safety factor
	is used. This is simply the factor by which the size of pre-existing
	databases is multiplied when comparing against available disk space.

	Specify '-F 0' to disable the safety factor check.

	The disk space safety check is only meaningful if P4ROOT was previously
	populated with a full set of data.

	Specifying a nubmer greater than 1, say 1.2 (the default) gives more
	breathing room.

	Specifying a value lower than 1, say 0.95, may be OK if you are certain
	the expanded-from-a-checkpoint db.* files are significantly smaller
	than size the prior set of db.* files.

	This option is mutually exclusive with '-R'. If '-R' is used, databases
	are removed, and there is no need to calculate disk space.

 -i <instance>
	Specify the SDP instance. This can be omitted if SDP_INSTANCE is already
	defined.

 -s <ServerID>
	Specify the ServerID.  This value is written into $P4ROOT/server.id file.

	If no $P4ROOT/server.id file exists, this flag is required.

	If the $P4ROOT/server.id file exists, this argument is not needed. If this
	'-s <ServerID>' is given and a $P4ROOT/server.id file exists, the value in
	the file must match the value specified with this argument.

 -t <Type>
	Specify the replica type tag if the checkpoint to be loaded is for an edge
	server or replica. The set of valid values for the replica type
	tag are defined in the documentation for mkrep.sh.  See: mkrep.sh -man

	If the type is specified, the '-s <ServerID>' is required.

	If the SDP Server Spec Naming Standard is followed, the ServerID
	specified with '-s' will start with 'p4d_'. In that case, the
	value for '-t edge' value is inferred, and '-t' is not required.

	If the type is specified or inferred, certain behaviors change based
	on the type:
	* If the type is edge, only the correct edge-specific subset of database
	tables are loaded.
	* The P4ROOT/license file check is suppressed unless the type is
	ha, ham, fs, for fsm (standby replicas usable with 'p4 failover').

	Do not use this '-t <Type>' option if the checkpoint being loaded is
	for a master server.

	For an edge server, an edge seed checkpoint created with edge_dump.sh
	must be used if the edge is filtered, e.g. if any of the *DataFilter
	fields in the server spec are used. If the edge server is not filtered
	by means other than being an edge server (for which certain tables are
	filtered by nature), a standard full checkpoint from the master can be
	used.

	For a filtered forwarding replica, a proper seed checkpoint must be
	loaded.  This can be created on the master using key options to p4d,
	including '-P <ServerID> -jd <SeedCkp' on the master (possibly using
	the 'offline_db' to avoid downtime, similar to how edge_dump.sh
	works for edge servers).

	WARNING: While this script is useful for seeding a new edge server, this
	script is NOT to be used for recovering or reseeding an existing edge server,
	because all edge-local database tables (mostly workspace data) would be lost.
	To recover an existing edge server, see the recover_edge.sh script.

	Warning: If this option is specified with the incorrect type for the
	checkpoint specified, results will be unpredictable.

 -verify default [-delay <delay>]
 -verify "Verify Options" [-delay <delay>]

	Specify '-verify' to initiate a call to 'p4verify.sh' after the server
	is online. On a replica, this can be useful to cause the server to pull
	missing archive files from its P4TARGET server. If this load_checkpoint.sh
	script is used in a recovery situation for a master server, this '-verify'
	option can be used to discover if archive files are missing after the
	metadata is recovered.

	The 'p4verify.sh' script has a rich set of options. See 'p4verify.sh -man'
	for more info.  The options to pass to p4verify.sh can be passed in a
	quoted list, or '-verify default' can be used to indicate these default
	options:

	-o MISSING

	By default, a fast verify is used if the p4d version is new enough (2021.1+).
	See 'p4verify.sh -man' for more information, specifically the description
	of the '-o MISSING' option.

	In all cases, p4verify.sh is invoked as a background process; this
	load_checkpoint.sh script does not wait for it to complete. The p4verify.sh
	script will email as per normal when it completes.

	The optional delay option specifies how long to wait until kicking off the
	p4verify.sh command, in seconds. The default is 600 seconds.
	This is intended to give the replica time get get caught up with metadata
	before the archive pulls are scheduled. The delay is a workaround for job079842.

 -c	Specify that SSL certificates are required, and not to be generated with
	'p4d_N -Gc'.

	By default, if '-c' is not supplied and SSL certs are not available, certs
	are generated automatically with 'p4d_N -Gc'.

 -l	Specify that the server is to start without a license file. By default, if
	there is no $P4ROOT/license file, this script will abort.  Note that if '-l'
	is specified and a license file is actually needed, the attempt this script makes
	to start the server after loading the checkpoint will fail.

	If '-t <type>' is specified, the license check is skipped unless the type is
	'ha', 'ham', 'fs,' or 'fsm'.  Replicas that are potential targets for a 'p4
	failover' need a license file for a failover to work.

 -r	Specify '-r' to replay only to P4ROOT.  By default, this script replays both
	to P4ROOT and the offline_db.

 -b	Specify '-b' to start the a p4broker process (if configured).  By default
	the p4d process is started after loading the checkpoint, but the p4broker
	process is not. This can be useful to ensure the human administrator has
	an opportunity to do sanity checks before enabling the broker to allow
	access by end users (if the broker is deployed for this usage).

 -y	Use the '-y' flag to bypass an interactive warning and confirmation
	prompt.

 -L <log>
	Specify the path to a log file.  By default, all output (stdout and stderr)
	goes to:
	/p4/<instance>/logs/load_checkpoint.<timestamp>.log

	NOTE: This script is self-logging.  That is, output displayed on the screen
	is simultaneously captured in the log file.  Do not run this script with
	redirection operators like '> log' or '2>&1', and do not use 'tee.'

 -si	Operate silently.  All output (stdout and stderr) is redirected to the log
	only; no output appears on the terminal.
      
 -d     Set debugging verbosity.

 -D     Extreme debugging verbosity using bash 'set -x' mode.

HELP OPTIONS:
 -h	Display short help message
 -man	Display man-style help message

USAGE TIP:
	All the non-interactive examples below illustrate the practice of using
	redirects to create an extra log file named 'load.log' in the $LOGS
	directory for the instance. This load.log file is identical to, and in
	addition to, the standard timestampped log generated by this script.  The
	intent of this practice is to leave a trail of when a checkpoint was last
	loaded on any given server machine.

EXAMPLES:
	EXAMPLE 1: Non-interactive Usage

	Non-interactive usage (bash syntax) to load a checkpoint:

	nohup /p4/common/bin/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz -i 1 -y < /dev/null > /p4/1/logs/load.log 2>&1 &

	Then, monitor with:
	tail -f $(ls -t $LOGS/load_checkpoint.*.log|head -1)


	EXAMPLE 2: Checkpoint Load then Verify, for the SDP Instance alpha.

	Non-interactive usage (bash syntax) to load a checkpoint followed by a full
	verify of recent archives files only with other options passed to verify.sh:

	nohup /p4/common/bin/load_checkpoint.sh /p4/alpha/checkpoints/p4_alpha.ckp.95442.gz -i alpha -verify -recent -nu -ns -y < /dev/null > /p4/alpha/logs/load.log 2>&1 &

	EXAMPLE 3: Load Checkpoint and Journals

	Non-interactive usage (bash syntax) to loading a checkpoint and subsequent journals:

	nohup /p4/common/bin/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz /p4/1/checkpoints/p4_1.jnl.4025 /p4/1/checkpoints/p4_1.jnl.4026 -i 1 -y < /dev/null > /p4/1/logs/load.log 2>&1 &

	Then, monitor with:
	tail -f $(ls -t $LOGS/load_checkpoint.*.log|head -1)


	EXAMPLE 4: Interactive usage.

	Interactive usage to load a checkpoint with no license file.

	/p4/common/bin/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz -i 1 -l

	With interactive usage, logging still occurs; all output to the screen is
	captured.

	Note that non-interactive usage with nohup is recommended for checkpoints
	with a long replay duration, to make operation more reliable in event of a
	shell session disconnect.  Alternately, running interactively in a 'screen'
	session (if 'screen' is available) provides similar protection against
	shell session disconnects.

	EXAMPLE 5: Seed New Edge

	Seeding a new edge server.

	nohup /p4/common/bin/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz -i 1 -s p4d_edge_syd < /dev/null > /p4/1/logs/load.log 2>&1 &

	WARNING: While this script is useful for seeding a new edge server, this
	script is NOT to be used for recovering or reseeding an existing edge server,
	because all edge-local database tables (mostly workspace data) would be lost.
	To recover an existing edge server, see the recover_edge.sh script.

	EXAMPLE 6: Seed New Edge and Verify

	Seeding a new edge server and then do a verify with default options.

	nohup /p4/common/bin/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025.gz -i 1 -s p4d_edge_syd -verify default < /dev/null > /tmp/null 2>&1 &

	EXAMPLE 7: Load a Parallel Checkpoint on an Edge and Verify Recent

	This non-interactive example loads a parallel checkpoint directory.  The
	usage difference is that the checkpoint path provided is a parallel
	checkpoint directory rather than a single checkpoint file.  This example
	loads the checkpoint for a new edge server, and verifes only the most
	recent 3 changes in each depot.  The delay before calling p4verify.sh,
	10 minutes (600) by default, is shortened to 5 seconds in this example.

	nohup /p4/common/bin/load_checkpoint.sh /p4/1/checkpoints/p4_1.ckp.4025 -i 1 -s p4d_edge_syd -verify "-o MISSING -recent=3 -ns -L /p4/1/logs/p4verify.fast_and_recent.log" -delay 5 -y < /dev/null > /p4/1/logs/load.log 2>&1 &

