Abstract: Methods and systems for collision handling during an asynchronous replication are provided. A system includes a cache memory system comprising a number of cache memory pages. A collision detector detects when a host is attempting to overwrite a cache memory page that has not been completely replicated. A revision page tagger copies the cache memory page to a free page and tags the copied page as protected.

Abstract: Methods and systems for collision handling during an asynchronous replication are provided. A system includes a cache memory system comprising a number of cache memory pages. A collision detector detects when a host is attempting to overwrite a cache memory page that has not been completely replicated. A revision page tagger copies the cache memory page to a free page and tags the copied page as protected.

Abstract: Methods and systems for managing sets of transactions for replication are provided. A system includes a number of origination nodes forming a source array. A sequence number generator generates sequence numbers based, at least in part, on a time interval during which a transaction is received. A subset manager groups transactions into subsets based, at least in part, on the sequence number.

Abstract: Methods and systems for managing manifests for replication are provided. A system includes a number of origination nodes forming a source array. A remote copy ticket dispenser provides a replication ticket for a transaction to be grouped with other transactions and to be replicated to a destination array. A transaction communicator sends transactions to the destination array.

Abstract: A method of associating a VLAN with a primary VLAN such that a large number of VLANs can be supported by a switch infrastructure without unduly affecting the resources of the switch infrastructure. The method comprises assigning at set of at least one attribute for a first VLAN comprising the steps of receiving a frame of frame-based data, processing the frame to determine a first VLAN identifier; associating said first VLAN identifier with a primary VLAN identifier; and associating the set of at least one attribute of the first VLAN with a corresponding set of at least one attribute of said primary VLAN, such that the characteristics of an attribute in the set of at least one attribute of the first VLAN is determined by the characteristics of a corresponding attribute of the primary VLAN. In this manner, up to 4094 VLANs can be supported by a switch infrastructure.