What is the difference between synchronous replication and asynchronous replication?
Synchronous replication technology does not acknowledge the write from the primary application until the block has been replicated to the target site. Asynchronous replication then acknowledges the write and then replicates that block over time. Each has advantages and disadvantages in different scenarios. Synchronous replication has the advantage of being continually up to date at the target site. You always know that the data at the target site is as current as the data at the source site. The challenge is that since it won’t acknowledge the write until it knows that the block has been replicated, the length of time it takes to get that block to the target can change the performance of the front-end application. So typically, synchronization is only done within a data center or at a very short distance — less than 50 miles, or even 20 miles away. There are some technologies that are allowing people to go out further than that, but they are newer technologies. More on data replicatio
Synchronous replication technology does not acknowledge the write from the primary application until the block has been replicated to the target site. Asynchronous replication then acknowledges the write and then replicates that block over time. Each has advantages and disadvantages in different scenarios. Synchronous replication has the advantage of being continually up to date at the target site. You always know that the data at the target site is as current as the data at the source site. The challenge is that since it won’t acknowledge the write until it knows that the block has been replicated, the length of time it takes to get that block to the target can change the performance of the front-end application. So typically, synchronization is only done within a data center or at a very short distance — less than 50 miles, or even 20 miles away. There are some technologies that are allowing people to go out further than that, but they are newer technologies. The advantage of asynch
Synchronous replication technology does not acknowledge the write from the primary application until the block has been replicated to the target site. Asynchronous replication then acknowledges the write and then replicates that block over time. Each has advantages and disadvantages in different scenarios. Synchronous replication has the advantage of being continually up to date at the target site. You always know that the data at the target site is as current as the data at the source site. The challenge is that since it won’t acknowledge the write until it knows that the block has been replicated, the length of time it takes to get that block to the target can change the performance of the front-end application. So typically, synchronization is only done within a data center or at a very short distance — less than 50 miles, or even 20 miles away. There are some technologies that are allowing people to go out further than that, but they are newer technologies. The advantage of asynch
