Emc IP Holding Company LLC

Yair Cohen

Assaf Natanzon

Ran Goldschmidt

A computer implemented method for reading signatures corresponding to a portion of data on a virtual machine disk on a production site, wherein reading the signature includes mapping the virtual machine disk offset into a physical storage offset, and reading the signature from the physical storage; sending the signature of the portion of data to a replication site; obtaining a mapping from a virtual disk to a physical disk at the replica site; issuing a command to write a portion of data corresponding to the signature to a the physical storage based on the mapping of the replica of the virtual machine disk on the replication site; determining if the command was successful; and based on a determination that the command was not successful, marking the locations corresponding to the signature for synchronization in a synchronization structure.

Data synchronization

In one aspect, a method includes storing a virtual machine disk in a first logical unit stored on a data store; replicating the first virtual machine disk used by a first virtual machine at a second virtual machine disk stored on a second logical unit on a cloud array storage device; storing changes to the first virtual machine disk on a journal stored on the data store; periodically rolling each virtual machine disk of virtual machines on the second logical unit to a same-point-in-time using the journal and taking a snapshot of the second logical unit at the same point-in-time and sending the snapshots to a cloud storage network.

Continuous data protection with cloud resources

A computer implemented method for replicating virtual machine disk volumes on a storage array supporting reading signatures of data based on offset of data by reading signatures of data of a production virtual machine on production site; wherein reading the signature includes mapping a virtual machine disk offset into a physical storage offset and reading the signature from the physical storage; reading signatures of data of a replica virtual machine used to replicate the production virtual machine on a replica site wherein reading the signature includes mapping a virtual machine disk offset into a physical storage offset and reading the signature from the physical storage; and based on determination the signatures are not identical marking the locations for synchronization in a synchronization structure.

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Pardes Hana, Israel

Yair Cohen