Quick FAQ

Triple Mirroring vs. 3-Geo OBS Configuration

Triple Mirroring vs. 3-Geo OBS Configuration

Remote DR Site

Remote DR Site

ORWestchester NYC Jersey City

WAN

Jersey City, NJ

New York City, NY

Westchester Co., NY

3 Redundant Sites

One System Spread Across 3 Sites

BitSpread™

Resilience is a system attributeSelf-healing and no SPOF

48% reduction of the Disk Overhead of Triple Mirror*

*based upon Western Digital Corporation internal testing

Triple Mirroring vs. 3-Geo OBS Configuration

Triple Mirroring requires 3 identical data stores in 3 discrete locations, each with its own complete copy of the data. Whereas a 3-geo OBS configuration distributes one data store across 3 locations, each containing 1/3 of the erasure encoded data.

Why you should care• You can protect data while using ~48% less storage* (160% vs. 300% of data) and

consume less network bandwidth with 3-geo OBS compared with triple mirroring.

• You can manage a 3-geo OBS as a single namespace through one management console.

• You can rehydrate data from only a subset of the erasure coded objects even if an entire data center is not accessible and there are no “failover” or “rebuild” times.

*per Western Digital Corporation internal testing: using 3-geo erasure coding requires 1.57x to 1.88x storage capacity compared with 3x required for triple mirroring

Thanks for watching

Clay RyderDCS Marketing itblog.sandisk.com/author/clayryder

© 2017 Western Digital Corporation. All rights reserved. Western Digital, the Western Digital Logo, and BitSpread are registered trademarks of Western Digital Corporation or its affiliates in the U.S. and/or other countries. All other marks are the property of their respective owners.

"Faster Does It" Kevin MacLeod (incompetech.com) — Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/

@WesternDigiDC

SanDisk Data Center Solutions

@BigDataFlash

HGST, a Western Digital brand