Abstract: A system can manage storage and access of data blocks in a hybrid environment. In one example, a system can identify a plurality of data block replicas distributed across sites, the plurality of data block replicas corresponding to respective blocks of data. The system can monitor events associated with the plurality of data block replicas and, based on the events, generate respective status and access data for the plurality of data block replicas. Based on the respective status and access data, the system can determine that one or more data block replicas associated with a block of data have reached a threshold. In response to the one or more data block replicas reaching the threshold, the system can modify a replica distribution across the sites for the block of data.