Nandakumar Gopalakrishnan

US Patent:

20170206260, Jul 20, 2017

Filed:

Mar 20, 2017

Appl. No.:

15/464267

Inventors:

- Seattle WA, US
KERRY QUINTIN LEE - SEATTLE WA, US
JAMES MICHAEL THOMPSON - SEATTLE WA, US
JIANHUA FAN - SEATTLE WA, US
NANDAKUMAR GOPALAKRISHNAN - SEATTLE WA, US

Assignee:

Amazon Technologies, Inc. - Seattle WA

International Classification:

G06F 17/30
G06F 3/06

Abstract:

A block-based storage system may implement reducing durability state for a data volume. A determination may be made that storage node replicating write requests for a data volume is unavailable. In response, subsequent write requests may be processed according to a reduced durability state for the data volume such that replication for the data volume may be disabled for the storage node. Write requests may then be completed at a fewer number of storage nodes prior to acknowledging the write request as complete. Durability state for the data volume may be increase in various embodiments. A storage node may be identified and replication operations may be performed to synchronize the current data volume at the storage node with a replica of the data volume maintained at the identified storage node.

US Patent:

20160328168, Nov 10, 2016

Filed:

Jul 21, 2016

Appl. No.:

15/216644

Inventors:

- Seattle WA, US
NANDAKUMAR GOPALAKRISHNAN - SEATTLE WA, US
JIAHUA HE - SUNNYVALE CA, US
JAMES MICHAEL THOMPSON - SEATTLE WA, US
JIANHUA FAN - SEATTLE WA, US
FNU AMIT ANAND AMLESHWARAM - SEATTLE WA, US
KERRY QUINTIN LEE - SEATTLE WA, US

Assignee:

Amazon Technologies, Inc. - Seattle WA

International Classification:

G06F 3/06

Abstract:

Write optimization for block-based storage performing snapshot operations may be implemented. Write requests for a particular data volume may be received for which a snapshot operation is in progress. A determination may be made as to whether a data chunk of the data volume modified as part of the write request has not yet been stored to a remote snapshot data store as part of the snapshot operation. For a data chunk that is to be modified and that has not yet been stored, the data chunk may be stored in a local in-memory volume snapshot buffer. Once the data chunk is stored in the in-memory volume snapshot buffer, the write request may be performed and acknowledged as complete. The data chunk may be sent to the remote snapshot data store asynchronously with regard to the acknowledgment of the write request.

US Patent:

20150261443, Sep 17, 2015

Filed:

Mar 11, 2014

Appl. No.:

14/204943

Inventors:

- Reno NV, US
KERRY QUINTIN LEE - SEATTLE WA, US
JAMES MICHAEL THOMPSON - SEATTLE WA, US
JIANHUA FAN - SEATTLE WA, US
NANDAKUMAR GOPALAKRISHNAN - SEATTLE WA, US

Assignee:

Amazon Technologies, Inc. - Reno NV

International Classification:

G06F 3/06

Abstract:

A block-based storage system may implement reducing durability state for a data volume. A determination may be made that storage node replicating write requests for a data volume is unavailable. In response, subsequent write requests may be processed according to a reduced durability state for the data volume such that replication for the data volume may be disabled for the storage node. Write requests may then be completed at a fewer number of storage nodes prior to acknowledging the write request as complete. Durability state for the data volume may be increase in various embodiments. A storage node may be identified and replication operations may be performed to synchronize the current data volume at the storage node with a replica of the data volume maintained at the identified storage node.