DB_REPLICATE(1)

💖 db_replicate — ok so hear me out bestie ✨

bestie. you know how you already have a Transactional Data Store app and you're like "wow this is cute but what if it was highly available"? that's literally this. db_replicate from the BerkeleyDB Utilities (manual page DB_REPLICATE(1), she's iconic) is a daemon process that provides replication/HA services on a transactional environment. the whole point is that it lets you upgrade an existing Transactional Data Store application into an HA application with only minor modifications. ate. 💅

---

✨ SYNOPSIS ✨

db_replicate [-MVv] [-h home] [-L file] [-P password] [-T num-threads]
[-t secs]

---

🦋 DESCRIPTION 🦋

okay so. db_replicate is a daemon process that provides replication/HA services on a transactional environment. it is literally the glow-up your app needed. this utility enables you to upgrade an existing Transactional Data Store application to an HA application with minor modifications — like, minor minor. a lil tweak. a lil sprinkle. 🎀

---

💅 OPTIONS 💅

• -h home — specify a home directory for the database environment. if you don't, it just uses the current working directory, no big deal. 🏠
• -L file — log the execution of the db_replicate utility to the specified file, in this exact format, where ### is the process ID and the date is the time the utility was started:

db_replicate: ### Wed Jun 15 01:23:45 EDT 1995

also, events such as site role changes will be noted in the log file. and heads up — this file will be removed if the db_replicate utility exits gracefully. so if it's still sitting there, something went feral. 😭

• -M — start the db_replicate utility to be the master site of the replication group 👑. otherwise, the site will be started as a client replica. main character energy vs. supporting cast, your choice.
• -P password — specify an environment password. and bestie, real talk: although Berkeley DB utilities overwrite password strings as soon as possible, be aware there may be a window of vulnerability on systems where unprivileged users can see command-line arguments, or where utilities are not able to overwrite the memory containing the command-line arguments. so like… be aware. 🙈
• -T num-threads — specify the number of replication message processing threads. more threads, more ✨throughput✨.
• -t secs — specify how often (in seconds) the utility will check for program interruption and resend the last log record. lil heartbeat. 💓
• -V — write the library version number to the standard output, and exit. quick lil flex then bye. 🌈
• -v — turn on replication verbose messages. these messages will be written to the standard output and will be quite voluminous. like, voluminous voluminous. you've been warned. 💀

---

the db_replicate utility does not attempt to create the Berkeley DB shared memory regions if they do not already exist. so the order matters, bestie: the application that creates the region should be started first, and once the region is created, the db_replicate utility should be started. and the application must use the DB_INIT_REP and DB_THREAD flags when creating the environment. no cap. 🔥

the db_replicate utility uses a Berkeley DB environment (as described for the -h option, the environment variable DB_HOME, or because the utility was run in a directory containing a Berkeley DB environment). and to avoid environment corruption when using a Berkeley DB environment, db_replicate should always be given the chance to detach from the environment and exit gracefully. to cause db_replicate to release all environment resources and exit cleanly, send it an interrupt signal (SIGINT). be nice to her and she'll be nice to you. 🫶

---

🎀 EXIT STATUS 🎀

the db_replicate utility exits 0 on success, and >0 if an error occurs. simple as. ⭐

---

🌸 ENVIRONMENT 🌸

• DB_HOME — if the -h option is not specified and the environment variable DB_HOME is set, it is used as the path of the database home, as described in DB_ENV->open. 🍓

---

💀 NOTES 💀

this utility is not supported for use with the DB SQL APIs. not a vibe for the SQL girlies, sorry. 🧚

---

🔥 SEE ALSO 🔥

db_archive(1) db_checkpoint(1) db_deadlock(1) db_dump(1) db_hotbackup(1) db_log_verify(1) db_load(1) db_printlog(1) db_recover(1) db_stat(1) db_tuner(1) db_upgrade(1) db_verify(1)

---

okay that's the whole thing, you're literally a replication girlie now 💜 this was BerkeleyDB 5.3.28, dated 06 December 2016 — she's vintage, she's classic, she's serving. go forth and replicate, bestie. slay. ✨👑