Upgrade from 1.6 directly to 2.x with downtime
Versions later that 1.6 have incompatible .snap and .xlog file formats: 1.6 files are supported during upgrade, but you won’t be able to return to 1.6 after running under 1.10 or 2.x for a while. A few configuration parameters are also renamed.
To perform a live upgrade from Tarantool 1.6 to a more recent version, like 2.8.4, 2.10.1 and such, it is necessary to take an intermediate step by upgrading 1.6 -> 1.10 -> 2.x. This is the only way to perform the upgrade without downtime.
However, a direct upgrade of a replica set from 1.6 to 2.x is also possible, but only with downtime.
Here is how to upgrade from Tarantool 1.6 directly to 2.x:
- Stop all instances in the replica set.
- Upgrade Tarantool version to 2.x on every instance.
- Upgrade the corresponding instance files and applications, if needed.
- Start all the instances with Tarantool 2.x.
box.schema.upgrade()on the master.
box.snapshot()on every node in the replica set.