Emc IP Holding Company LLC

Dell Products Inc.

Arnab Tah

Rimpesh Patel

Amit Pundalik Anchi

Vighneshwar Hegde

Mahalakshmi Sokkalal

Megha Karanth

An apparatus comprises a processing device configured to identify data to be migrated from a first device to a second device, the first device comprising a first storage stack supporting a first storage request block protocol. The processing device is also configured to determine whether a second storage stack of the second device supports the first storage request block protocol and, responsive to determining that the second storage stack of the second device does not support the first storage request block protocol, to convert storage request blocks directed to the data to be migrated from a first format of the first storage request block protocol to a second format of a second storage request block protocol. The processing device is further configured to migrate the data to the second device utilizing input-output operations comprising the storage request blocks in the second format of the second storage request block protocol.

Data migration between devices supporting different storage request block protocols

An apparatus comprises at least one processing device that includes a processor coupled to a memory. The processing device is configured to control delivery of input-output (IO) operations from a host device to at least one storage system over selected ones of a plurality of paths through a network, and to detect initiation of a non-disruptive upgrade of the host device. The processing device is further configured to identify, responsive to the detected initiation, one or more of the plurality of paths that will become temporarily unavailable in conjunction with the non-disruptive upgrade, and to modify path selection in the host device to avoid selecting the identified paths for at least a portion of a time period during which the non-disruptive upgrade is in progress. The processing device illustratively comprises at least a portion of the host device, including a multi-path input-output (MPIO) driver that performs at least a portion of the detection, identification and modification.

Path selection modification for non-disruptive upgrade of a host device

A host device is configured to communicate over a network with a storage system. The host device comprises a multi-path input-output (MPIO) driver configured to control delivery of input-output (IO) operations from the host device to the storage system over selected ones of a plurality of paths through the network. The MPIO driver is further configured to create a disk device on the host device, wherein the disk device corresponds to a subset of the plurality of paths to the storage system, and to execute a script enabling a boot image create operation to run on the created disk device.

Boot from SAN operation support on multi-pathing devices

An apparatus in one embodiment comprises a host device configured to communicate over a network with a storage system comprising a plurality of storage devices. The host device includes a set of input-output queues and a multi-path input-output driver configured to select input-output operations from the set of input-output queues for delivery to the storage system. The multi-path input-output driver is configured to analyze an input-output load pattern of the host device for a predetermined period of time and to categorize the input-output load pattern into one of a plurality of predetermined load pattern categories based at least in part on the analysis. The multi-path input-output driver is configured to transmit information specifying the categorization of the input-output load pattern to the storage system. The storage system is configured to adjust its processing of input-output operations based at least in part on the categorization of the input-output load pattern.

Categorizing host IO load pattern and communicating categorization to storage system

An apparatus in one embodiment comprises a host device configured to communicate over a network with a storage system comprising a plurality of storage devices. The host device includes a set of input-output queues and a multi-path input-output driver configured to select input-output operations from the set of input-output queues for delivery to the storage system. The multi-path input-output driver is further configured to detect at least first and second input-output operations from respective ones of at least first and second different processes executing on the host device, to assign a first policy identifier to the first input-output operation from the first process, and to assign a second policy identifier different than the first policy identifier to the second input-output operation from the second process. The input-output operations are queued in different ones of the queues of the set of input-output queues based at least in part on their respective assigned policy identifiers.

Growing community of inventors

Bengaluru, India

Arnab Tah