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Follow the conclusions to support Functions in redis cluster (#9899) Added 2 new FUNCTION sub-commands: 1. `FUNCTION DUMP` - dump a binary payload representation of all the functions. 2. `FUNCTION RESTORE <PAYLOAD> [FLUSH|APPEND|REPLACE]` - give the binary payload extracted using `FUNCTION DUMP`, restore all the functions on the given payload. Restore policy can be given to control how to handle existing functions (default is APPEND): * FLUSH: delete all existing functions. * APPEND: appends the restored functions to the existing functions. On collision, abort. * REPLACE: appends the restored functions to the existing functions. On collision, replace the old function with the new function. Modify `redis-cli --cluster add-node` to use `FUNCTION DUMP` to get existing functions from one of the nodes in the cluster, and `FUNCTION RESTORE` to load the same set of functions to the new node. `redis-cli` will execute this step before sending the `CLUSTER MEET` command to the new node. If `FUNCTION DUMP` returns an error, assume the current Redis version do not support functions and skip `FUNCTION RESTORE`. If `FUNCTION RESTORE` fails, abort and do not send the `CLUSTER MEET` command. If the new node already contains functions (before the `FUNCTION RESTORE` is sent), abort and do not add the node to the cluster. Test was added to verify `redis-cli --cluster add-node` works as expected.
18 lines
438 B
JSON
18 lines
438 B
JSON
{
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"DUMP": {
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"summary": "Dump all functions into a serialized binary payload",
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"complexity": "O(N) where N is the number of functions",
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"group": "scripting",
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"since": "7.0.0",
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"arity": 2,
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"container": "FUNCTION",
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"function": "functionDumpCommand",
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"command_flags": [
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"NOSCRIPT"
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],
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"acl_categories": [
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"SCRIPTING"
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]
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}
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}
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