Fast recovery in recoverpoint using direct storage access
Data protection operations based on direct storage access. Data protection operations that involve large data transfers are optimized or improved by transferring the data using a communication path that includes direct access to disks of a storage array. This avoids latencies associated with transferring data through the layers of the storage array. The locations of the data to be transferred are identified and provided to an appliance. The appliance can then read and transfer the data over a communication path that includes direct disk access.
1. A method for performing a data transfer operation, comprising:
accessing, by a source appliance, metadata associated with data stored in a source storage array through a front end of the source storage array, wherein the metadata includes a list of identifiers that identifies physical locations of data in the source storage array to be transferred to a target storage array, wherein the target storage array includes a front end;
transferring the metadata to a target appliance using a first communication path, wherein the first communication path includes accessing a disk array of the source storage array through the front end of the source storage array, wherein access to the data stored in the disk array of the source storage array through the front end is abstracted using one or more layers; and
determining a second communication path for transferring the data identified in the list of identifiers from the source storage array to the target storage array, wherein the second communication path uses physical locations of the data and is one of:
the source appliance (i) reading the data using the list of identifiers directly from the disk array of the source storage array without using the front end of the source storage array and (ii) writing the data directly to a disk array of the target storage array without using the front end of the target storage array;
or the target appliance (i) reading the data using the list of identifiers directly from the disk array of the source storage array without using the front end of the source storage array and (ii) writing the data to the disk array of the target storage array directly or via the front end of the target storage array.
2. The method of claim 1 , further comprising accessing the data stored in the source storage array, by the source appliance, using the list of identifiers.
3. The method of claim 1 , wherein the list of identifiers comprises a scatter gather list.
4. The method of claim 1 , further comprising accessing the data stored in the source storage array, by the target appliance, using the list of identifiers, wherein the second communication path includes from the disk array of the source storage array to the target appliance.
5. The method of claim 1 , wherein the data protection operation is performed without caching the data.
6. The method of claim 1 , further comprising reading the data associated with the list of identifiers a single time without caching the read data in a cache associated with a disk array of the source storage array.
7. A non-transitory storage medium having stored therein instructions that are executable be one or more hardware processors to perform operations comprising:
accessing, by a source appliance, metadata associated with data stored in a source storage array through a front end of the source storage array, wherein the metadata includes a list of identifiers that identifies physical locations of data in the source storage array to be transferred to a target storage array, wherein the target storage array includes a front end;
transferring the metadata to a target appliance using a first communication path, wherein the first communication path includes accessing a disk array of the source storage array through the front end of the source storage array, wherein access to the data stored in the disk array of the source storage array through the front end is abstracted using one or more layers; and
determining a second communication path for transferring the data identified in the list of identifiers from the source storage array to the target storage array, wherein the second communication path uses physical locations of the data and is one of:
the source appliance (i) reading the data using the list of identifiers directly from the disk array of the source storage array without using the front end of the source storage array and (ii) writing the data directly to a disk array of the target storage array without using the front end of the target storage array;
or the target appliance (i) reading the data using the list of identifiers directly from the disk array of the source storage array without using the front end of the source storage array and (ii) writing the data to the disk array of the target storage array directly or via the front end of the target storage array.
8. The non-transitory storage medium of claim 7 , further comprising accessing the data stored in the source storage array, by the source appliance, using the list of identifiers.
9. The non-transitory storage medium of claim 7 , wherein the list of identifiers comprises a scatter gather list.
10. The non-transitory storage medium of claim 7 , further comprising accessing the data stored in the source storage array, by the target appliance, using the list of identifiers, wherein the second communication path includes from the disk array of the source storage array to the target appliance.
11. The non-transitory storage medium of claim 7 , wherein the data protection operation is performed without caching the data.
12. The non-transitory storage medium of claim 7 , further comprising reading the data associated with the list of identifiers a single time without caching the read data in a cache associated with a disk array of the source storage array.