Cisco Technology, Inc.

Manikandan Veerachamy

Sandesh K Rao

Amit Chandra

Nivin Lawrence

Tushar Sinha

David W Duffey

The present disclosure is directed to seamless access to a common physical disk in an AMP system without an external hypervisor, and includes one or more processors and one or more computer-readable non-transitory storage media comprising instructions that, when executed by the one or more processors, cause one or more components of the system to perform operations including instantiating, by a first instance, a second instance during a system upgrade, creating, in the first instance, a first disk abstraction for a block device of a physical disk, and attaching the block device under the first disk abstraction. The operations further include providing the second instance network-based access to the physical disk using the first disk abstraction of the first instance during the system upgrade.

Seamless access to a common physical disk in an AMP system without an external hypervisor

The present disclosure is directed to migrating logical volumes from a thick provisioned layout to a thin provisioned layout, and includes one or more processors and one or more computer-readable non-transitory storage media comprising instructions that, when executed by the one or more processors, cause one or more components of the system to perform operations comprising creating an abstraction layer on top of a logical volume in a storage device, the abstraction layer for accessing the logical volume, the logical volume one of a plurality of logical volumes in a volume group of the storage device; allocating a thin pool from remaining storage space in the volume group of the storage device; creating a snapshot of the logical volume; adding a thin virtual volume corresponding to the logical volume to the thin pool; and copying data from the snapshot to the thin virtual volume.

Migrating logical volumes from a thick provisioned layout to a thin provisioned layout

The present disclosure is directed to an in-memory communication infrastructure for an asymmetric multiprocessing system without an external hypervisor, and includes one or more processors and one or more computer-readable non-transitory storage media comprising instructions that, when executed by the one or more processors, cause one or more components to perform operations including identifying data for transmission from a first instance to a second instance, writing, by the first instance, the data into a first ring of a shared memory, the first ring configured as a first transmit ring for the first instance, sending an inter-processor interrupt to the second instance to alert the second instance of the data written into the first ring, reading, by the second instance, the data from the first ring, the first ring configured as a first receive ring for the second instance, and transmitting the data to an application of the second instance.

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Milpitas, CA, United States of America

Manikandan Veerachamy