# The mainnet branch has been updated and synced with mainnet-staging

**URL:** https://forum.tezosagora.org/t/the-mainnet-branch-has-been-updated-and-synced-with-mainnet-staging/1498
**Category:** Research and Development
**Created:** [December 11, 2019, 4:14pm UTC](https://forum.tezosagora.org/t/the-mainnet-branch-has-been-updated-and-synced-with-mainnet-staging/1498 "2019-12-11T16:14:01Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![slarquie1](https://forum.tezosagora.org/user_avatar/forum.tezosagora.org/slarquie1/32/84_2.png) [@slarquie1](https://forum.tezosagora.org/u/slarquie1)
#### Post date: [December 11, 2019, 4:14pm UTC](https://forum.tezosagora.org/t/the-mainnet-branch-has-been-updated-and-synced-with-mainnet-staging/1498/1 "2019-12-11T16:14:01Z")

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Branch `mainnet` has been updated to be in sync with `mainnet-staging` (commit hash `7a87782010fe68ac05dec2e986b708abfa9184d2`).

**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](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 `archive` mode.

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.