Ideas

Current implementation of read-only replicas require them to be connected to the cluster. It means that every new replica adds some overhead to the operational cluster nodes, particularly its leader. It creates limitation of the feature as one mig...

Move custom and standard projections to Connectors.

Consider allowing read only replicas to connect to single node deployments. Currently, this is not possible because replication is disabled on single node databases.

ESDB currently supports only RSA keys in certificates when specifying --certificate-private-key-file. The advantage of using EC keys would be that the key is much smaller for the same security level (EC takes 256 bit vs RSA 2048 bit for same secur...

Seems like persistent subscriptions aim to solve two problems: Server-side checkpointing for use cases when events are being forwarded to a place that doesn't have the ability to store checkpoints (message brokers), or users just don't want to dea...

Crypto-assurance provides guarantees against mutations, truncation, and reordering. Although ESDB doesn't provide nativa mutation and reordering capability, data on disk can be tampered to change the content of events. ESDB supports truncation wit...

Currently, reads and subscriptions to $all require admin access, which isn't good for security. Supporting auth for $all will have performance impact when ACLs are used, but in combination with policies it could be fast enoguh because policies, un...

ESDB can be overloaded with read/write operations and it has no limitations enforced on the edge to prevent this. The idea is to set the connection limit (in general or per operation) and deny requests when the limit is exceeded. It will improve t...

ESDB has access control lists (ACLs) as the primary method to achieve granular (per stream) authorisation. However, ACLs need to be set up per stream, which is a burden for developers. Also, if the auth rules change, all the streams need to get th...

Allow one cluster to mirror another. Could be similar to read-only replica, but instead of a single node that is known to the source cluster, the mirror would be a read-only replicated cluster. One use of it is to enable faster reads. If the "oper...