Methods and apparatus for providing hypervisor level data services for server virtualization

摘要

A data center for data backup and replication, including a pool of multiple storage units for storing a journal of I/O write commands issued at respective times, wherein the journal spans a history window of a pre-specified time length, and a journal manager for dynamically allocating more storage units for storing the journal as the journal size increases, and for dynamically releasing storage units as the journal size decreases.

主权项

1. A method of data backup from a protected site to a recovery site, comprising:
receiving, by a recovery site computing device, an intercepted write request from a protected site computing device; selecting, by the recovery site computing device, a variable size storage unit from a plurality of variable size storage units to store the write request, wherein each of the variable size storage units comprises one or more variable size data chunks, wherein each of the one of more variable size data chunks corresponds to a window of time; adjusting, by the recovery site computing device, a size of the variable size storage unit using at least one of the one or more variable size data chunks; and storing, by the recovery site computing device, the write request in the variable size storage unit of a journal at the recovery site.