Method for efficient storage node replacement

Details Method for efficient storage node replacement Method for efficient storage node replacement

2009-08-25

2011-11-08

Dang, Thanh-Ha (Department: 2163)

Data processing: database and file management or data structures

File or database maintenance

Synchronization

C707S611000, C707S616000, C707S626000, C707S633000, C707S634000

Reexamination Certificate

active

08055615

ABSTRACT:
Methods and apparatus are described for a horizontally scalable high performance object storage architecture. Metadata are completely decoupled from object storage. Instead of file names, users are given a locator when the object is uploaded and committed. Users can store the locator along with their own metadata or embed it directly in the static content. Clients can choose which storage nodes to store data on based on dynamic measures of node performance. Since there is no coupling among storage servers, performance can scale horizontally by adding more nodes. The decoupling also allows the front end services and storage to scale independently. High service availability is achieved by object-level synchronous replication and having no single point of failure. Failed nodes are rebuilt using copies of data in other nodes without taking the cluster offline. In addition to the replication, the ability to add or remove nodes on-line reduces maintenance-related service downtime.

REFERENCES:
patent: 7496646 (2009-02-01), Casper et al.
patent: 7555527 (2009-06-01), Slaughter et al.
patent: 2004/0044755 (2004-03-01), Chipman
patent: 2010/0195538 (2010-08-01), Merkey et al.
U.S. Appl. No. 12/547,413.

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