Database migrations / Dgraph update

[chewxy]

See also two separate and related feature requests:

Feature request: Zero-downtime upgrades

Currently, when upgrading from one Dgraph version to the next, there is no way to do this without some downtime in the cluster. For high availability, it would be awesome to be able to upgrade a Dgraph cluster with zero downtime. This was discussed here, and as per @chewxy’s request, I have created a separate thread for this. One possible approach was suggested by @MichelDiz : Ideally, the zero downtime would be for both reads and writes. I’m aware that currently tablets are blocked for wr…

Improve Dgraph upgrade experience by supporting in-place & rolling upgrades

Moved from GitHub dgraph/4644 Posted by sleto-it: Experience Report This is a feature request to add an additional upgrade method, the in-place upgrade, which can coexist with our current logical upgrade method When the in-place upgrade will be available, this is a FR to support rolling upgrades (one node at a time) of Dgraph clusters, so that the upgrade can be done while the cluster remains up and running, and ideally while it keeps serving reads and/or reads and writes What you wanted to …