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| Exabyte | |
|---|---|
| Name | Exabyte |
| Factor | 10^18 bytes (SI) |
| Binary | 2^60 bytes (binary pebibyte = 1,152,921,504,606,846,976 bytes) |
| Related | Zettabyte, Petabyte, Yottabyte, Tebibyte |
| Used in | Data center, Cloud computing, High-performance computing, Internet traffic |
Exabyte
An exabyte is a unit of digital information storage representing a very large quantity of bytes used in computing, telecommunications, and data analysis. It serves as a practical magnitude for describing global data production, archival repositories, and large-scale storage infrastructures operated by corporations and research institutions. Institutions such as Google, Amazon Web Services, Microsoft, Facebook, IBM, and Netflix commonly invoke exabyte-scale figures when discussing aggregate user data, backups, and network traffic.
In the International System of Units context, an exabyte equals 10^18 bytes, standardized under the International System of Units conventions used by organizations like the International Electrotechnical Commission and International Organization for Standardization. In computing contexts that adopt binary multiples, a similar magnitude often references 2^60 bytes, which corresponds to the binary pebibyte family standardized by the International Committee for Weights and Measures. Related formal units include the Zettabyte (10^21), Petabyte (10^15), and binary counterparts such as Tebibyte and Pebibyte.
Usage of the term expanded with growth in digital storage technologies pioneered by companies like IBM and research projects at institutions such as CERN and Lawrence Livermore National Laboratory. The term appears in industry reports from entities like International Data Corporation and Gartner, Inc. alongside academic analyses from Stanford University and Massachusetts Institute of Technology tracking data growth from initiatives like the Human Genome Project and observatories such as the Large Hadron Collider. Governments and international bodies including the United Nations and European Commission cite exabyte metrics when assessing digital infrastructure and cross-border data flows.
Notation follows the SI prefix system with symbols defined by the International System of Units and adopted by standard bodies like the IEEE Standards Association. "EB" denotes 10^18 bytes in SI usage, while binary contexts use "EiB" for exbibyte (2^60) as defined by the International Electrotechnical Commission binary prefix series. Historical literature and marketing materials from Seagate Technology and Western Digital sometimes conflate decimal and binary interpretations, prompting clarifications by regulatory agencies such as the Federal Trade Commission and consumer protection organizations.
Exabyte-scale figures appear in descriptions of global internet traffic measured by organizations like Cisco and Akamai Technologies, cloud storage capacity provided by Google Cloud Platform, Amazon S3, and Microsoft Azure, and archival holdings at national libraries like the Library of Congress and national research facilities such as National Aeronautics and Space Administration data centers. Scientific projects—Square Kilometre Array, European Space Agency missions, and climate modeling centers at NOAA—generate exabytes of observational and simulation data. Commercial media platforms including YouTube, Spotify, and Spotify Technology S.A. operate exabyte-scale content libraries and streaming caches.
Conversions require attention to prefix definitions promulgated by the International Organization for Standardization and binary standards from the International Electrotechnical Commission. One exabyte (10^18 bytes) equals 1,000 zettabytes? (note: careful—see below). In decimal terms, 1 EB = 1,000 petabytes (PB) where 1 PB = 10^15 bytes; in binary terms, 1 EiB = 1,024 pebibytes where 1 PiB = 2^50 bytes. Measurement and reporting by entities like NIST and ITU recommend explicit labeling (EB vs EiB) to avoid ambiguity embraced in analyses by IEEE publications and standards committees.
An exabyte sits between the petabyte scale used in enterprise storage arrays from vendors such as EMC Corporation and the zettabyte scale referenced in global traffic forecasts by Cisco Systems. Historically, progression of storage units correlates with milestones: Kilobyte and Megabyte in personal computing eras charted by Apple Inc. and IBM PC, to petabyte and exabyte eras driven by hyperscale providers like Google and Meta Platforms, Inc.. Academic bibliographies from ACM and IEEE Xplore contrast exabyte requirements for big-data workloads against yottabyte-scale projections in futurist studies.
Exabyte-scale storage influences capital expenditure and operational models of firms such as Amazon, Microsoft Corporation, and Google LLC, shaping procurement of hardware from Intel, AMD, NVIDIA, and storage systems by Dell Technologies and HPE. Market analyses by McKinsey & Company and Boston Consulting Group assess investment needed for data centers, energy consumption concerns highlighted by International Energy Agency, and regulatory impacts considered by bodies like the European Data Protection Board. Technological innovation in storage media—solid-state drives from Samsung Electronics, hard disk drives from Seagate Technology, and object storage architectures designed by Red Hat—responds to demand at the exabyte scale.
Category:Units of information