1. A system for data replication, the system comprising: a first site, the first site comprising a logical storage medium, the logical storage medium mapped to tiered storage mediums; a journal, the journal comprising pending Input/Output (IO) data to the logical storage medium and metadata, the metadata containing information about the pending IO data for the logical storage medium; and computer-executable logic operating in memory, wherein the computer-executable program logic is configured for execution of: based on the metadata, creating a mapping of the pending IO data to the logical storage medium; notifying a fully automated storage tiering (FAST) storage manager of an expected IO storage pattern based on the metadata; wherein the FAST storage manager is enabled to change the mapping of the logical storage medium to the tiered storage mediums based on the expected IO storage pattern; and changing the mapping of the logical storage medium to the tiered storage mediums to optimize the pending IO data to the logical storage medium; wherein the FAST storage manager performs the changing of the mapping of the logical storage medium to the tiered storage medium; wherein the tiered storage mediums have different performance characteristics.