Redis cluster
Bull internals require atomic operations that span different keys. This behavior breaks Redis's rules for cluster configurations. However, it is still possible to use a cluster environment by using the proper bull prefix option as a cluster "hash tag". Hash tags are used to guarantee that certain keys are placed in the same hash slot, read more about hash tags in the redis cluster tutorial. A hash tag is defined with brackets. I.e. a key that has a substring inside brackets will use that substring to determine in which hash slot the key will be placed.
In summary, to make bull compatible with Redis cluster, use a queue prefix inside brackets. For example:
const queue = new Queue('cluster', {
prefix: '{myprefix}'
});
If you use several queues in the same cluster, you should use different prefixes so that the queues are evenly placed in the cluster nodes.
Last modified 1yr ago