FUNCTION-DUMP(3valkey)

💅 function-dump (Valkey Command Manual, bestie edition) 💅

okay so. welcome to the Valkey Command Manual page for FUNCTION DUMP, and honestly? it's giving "pack up your whole wardrobe in one suitcase" energy. let's get into it 🎀

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✨ NAME ✨

function-dump — dumps all libraries into a serialized binary payload. that's it. that's the whole job. no cap. 🫶

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✨ SYNOPSIS ✨

FUNCTION DUMP

literally just those two words, bestie. no args, no flags, no drama. iconic behavior honestly. 💅

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✨ DESCRIPTION ✨

so here's the tea ☕ — FUNCTION DUMP returns the serialized payload of all your loaded libraries. think of it like a little zip file of everything you've loaded, except it's a blob of bytes and you should not try to read it with your eyeballs.

you can restore that serialized payload later with the valkey-function-restore(7) FUNCTION RESTORE command. it's a save-and-load situation. dump now, restore later, no stress. 🦋

want the full lore? go read valkey-functions-intro(7) Introduction to Valkey Functions. that's the prequel, iykyk. ✨

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✨ REPLY ✨

valkey-protocol(7) Bulk string reply: the serialized payload 🎀

yep. one big bulk string. that's your whole library collection, baby. 👑

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✨ COMPLEXITY ✨

O(N) where N is the number of functions

so the more functions you got, the longer it takes. math is math, bestie. 😭

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✨ ACL CATEGORIES ✨

• @scripting
• @slow

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✨ HISTORY ✨

• Available since: 7.0.0 ⭐

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✨ EXAMPLES ✨

okay this example is so satisfying, watch this. it dumps the loaded libraries with FUNCTION DUMP, then it calls valkey-function-flush(7) FUNCTION FLUSH which deletes all the libraries 😭 (yes, really, gone gone), and then it restores the original libraries from the serialized payload with FUNCTION RESTORE. main character arc fr fr. 🌈

127.0.0.1:6379> FUNCTION LOAD "#!lua name=mylib \n server.register_function('myfunc', function(keys, args) return args[1] end)"
"mylib"
127.0.0.1:6379> FUNCTION DUMP
"\xf5\xc3@X@]\x1f#!lua name=mylib \n server.registe\rr_function('my@\x0b\x02', @\x06`\x12\nkeys, args) 6\x03turn`\x0c\a[1] end)\x0c\x00\xba\x98\xc2\xa2\x13\x0e$\a"
127.0.0.1:6379> FUNCTION FLUSH
OK
127.0.0.1:6379> FUNCTION RESTORE "\xf5\xc3@X@]\x1f#!lua name=mylib \n server.registe\rr_function('my@\x0b\x02', @\x06`\x12\nkeys, args) 6\x03turn`\x0c\a[1] end)\x0c\x00\xba\x98\xc2\xa2\x13\x0e$\a"
OK
127.0.0.1:6379> FUNCTION LIST
1) 1) "library_name"
   2) "mylib"
   3) "engine"
   4) "LUA"
   5) "functions"
   6) 1) 1) "name"
         2) "myfunc"
         3) "description"
         4) (nil)
         5) "flags"
         6) (empty array)

see?? mylib came BACK. the payload said "not today" and restored the whole vibe. ate and left no crumbs 💖

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✨ SEE ALSO ✨

eval(3valkey), evalsha(3valkey), evalsha_ro(3valkey), eval_ro(3valkey), fcall(3valkey), fcall_ro(3valkey), function(3valkey), function-delete(3valkey), function-flush(3valkey), function-help(3valkey), function-kill(3valkey), function-list(3valkey), function-load(3valkey), function-restore(3valkey), function-stats(3valkey), script(3valkey), script-debug(3valkey), script-exists(3valkey), script-flush(3valkey), script-help(3valkey), script-kill(3valkey), script-load(3valkey), script-show(3valkey)

like, the whole friend group. go say hi. 🫶🌸

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okay that's the page!! this was the Valkey Command Manual, version 9.0.0, dated 2025-10-21 — mwah, perfect, no notes. now go dump those libraries bestie, you got this 💜✨🎀