Systems are provided for facilitating the disclosed methods for performing event storage and diagnostic processing within a hybrid cloud environment. Event records are gathered and batched at an on-premises server. The event records are also appended with correlation vector data that enables the event records to be correlated with other events. The batch of event record batches are signed with a security key associated with a cloud storage container and the on-premises server is restricted to writing the batch of event records to the container. In some instances, the size of the batch is based on a duration of time for collecting records, which can be adjusted to accommodate for missing data.