mainnet has been updated to be in sync with
mainnet-staging (commit hash
This major release changes the storage backend and requires specific care when updating.
Changelog and upgrade instructions can be found in the release documentation page: https://tezos.gitlab.io/releases/december-2019.html
Note that if you are not using
mainnet-staging already, upgrading will take time. It takes about an hour if you are using the
full mode and several days if you are using the
The release documentation contains several upgrade paths depending on your situation to minimize the downtime of your node. Take your time to choose carefully.
If you have to temporarily use the old LMDB backend, you can use the branch named
mainnet-lmdb. Note that not only does it not contain the new storage backend, it also does not contain the new features of this release.