REPLICATION USING DEDUPLICATED SECONDARY COPY DATA

摘要

An information management system according to certain aspects uses backup copies or other secondary copies of production data for the purposes of replicating production data to another client. The secondary copies can be deduplicated copies. By utilizing available secondary copies of the data for replication, the system can reduce the impact on the production machines associated with replication. Utilizing deduplicated copies not only reduces the amount of stored data, but also reduces the amount of data that is communicated between the source and the destination, increasing the speed of the replication process.

主权项

1. A system for replicating data in secondary storage using secondary copy data, the system comprising:
a source system comprising a source client computing device comprising hardware, one or more source primary storage devices associated with the source client computing device, one or more source secondary storage controller computers comprising hardware, and one or more source secondary storage devices; and a destination system comprising a destination client computing device comprising hardware, one or more destination primary storage devices associated with the destination client computing device, one or more destination secondary storage controller computers comprising hardware, and one or more destination secondary storage devices; the one or more source secondary storage controller computers configured to:
create a first copy of primary data residing in the one or more source primary storage devices on the one or more source secondary storage devices, wherein the first copy is a deduplicated secondary copy including a plurality of data blocks and corresponding signature values and reflects a change to at least one changed portion of the primary data as compared to a previous deduplicated secondary copy of the primary data;send the signature value corresponding to at least a first data block of the plurality of data blocks in the first copy to the one or more destination secondary storage controller computers, the first data block corresponding to the at least one changed portion of the primary data; andin response to notification from the one or more destination secondary storage controller computers that the first data block does not exist in the one or more destination secondary storage devices, send the first data block to the one or more destination secondary storage controller computers; the destination system configured to:
copy the first data block to the one or more destination secondary storage devices; andrestore a deduplicated secondary copy of the primary data stored on the one or more destination secondary storage devices to the one or more destination primary storage devices such that the change to the primary data is propagated to a replicated version of the primary data residing on the destination primary storage devices.