Netapp, Inc.

William Minckler

David D Wright

James Philip Wittig

Jared Cantwell

Joe Roback

Disclosed are systems, computer-readable mediums, and methods for receiving a start replication message to replicate a source volume to a replicated volume. A source system forwards I/O requests to the replica server. A data structure associated with the replicated volume is initialized. A write request is received from the source system. The write data is written to the replicated volume and the data structure is updated. Source metadata associated with the source volume is received. The source metadata is compared with prior metadata associated with a prior point-in-time image of the source volume to determine blocks of data that have changed since the prior point-in-time image of the source volume. A first block is determined to not be retrieved based upon the data structure. A second block is determined to be retrieved based upon the data structure. The second block is received and written to the replicated volume.

Data syncing in a distributed system

Disclosed are systems, computer-readable mediums, and methods for reading a sequence number from regions of a solid state storage device. A latest region is determined based upon the sequence numbers and a checkpoint file is read within the latest region. A request for a block of data of a first branch is received. A first block of pointers associated with the first branch from the checkpoint file is read. A first pointer from the first block of pointers and a second block of pointers pointed to by the first pointer are read. A second pointer from the second block of pointers and a third block of pointers pointed to by the second pointer are read. A third pointer from the third block of pointers and data pointed to by the third pointer are read. The block of data of the first branch is determined based upon the read data. The block of data is returned.

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Broomfield, CO, United States of America

William Minckler