CODEWITHSUNDEEP
redis
Selvatico
Selvatico

Reputation: 503

Update redis server from 1.2.6 to latest

I need to update redis server.

I found a way to save DB on disk and after restore it, but my question is will new redis server have problems with read old DB structure?

Upvotes: 2

Views: 1811

Answers (1)

Didier Spezia
Didier Spezia

Reputation: 73216

The version of the dump file is encoded in the first 9 characters. So the following command can be used to check it:

$ head -1 dump.rdb | cut -c1-9
REDIS0002

Redis 1-2-6 used version 1 of the dump file (it can read and write only version 1)

Redis 2-4-6 is using version 2. However, it is able to read both version 1 and version 2 files. Version 2 happen to be backward compatible with version 1 anyway.

To upgrade, you can just read the version 1 dump file with a recent Redis release, and then dump the file again (it will be written with version 2 format). The new file may be smaller due to some optimizations available with recent Redis versions and the version 2 format.

Optionally, you can check the integrity of the dump file before starting the 2-4 Redis instance by using the redis-check-dump command:

$ ../redis-2.4.4/src/redis-check-dump dump.rdb 
==== Processed 19033 valid opcodes (in 639641 bytes) ===========================

This is a pure read-only utility, it cannot harm the dump file.

Upvotes: 5

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