Peer to Peer Remote Copy or PPRC is a protocol to
replicate a storage volume to another control unit at a remote site.
Synchronous
Synchronization is the coordination of events to operate a system in unison. For example, the conductor of an orchestra keeps the orchestra synchronized or ''in time''. Systems that operate with all parts in synchrony are said to be synchrono ...
PPRC causes each write to the primary storage volume to be performed to the secondary volume as well, and the I/O is only considered complete when the update to both the primary and secondary volumes has completed. Asynchronous PPRC will flag tracks on the primary to be duplicated to the secondary when time permits.
PPRC is also the name
IBM
International Business Machines Corporation (using the trademark IBM), nicknamed Big Blue, is an American Multinational corporation, multinational technology company headquartered in Armonk, New York, and present in over 175 countries. It is ...
calls their implementation of the protocol for their storage hardware.
Other vendors have their own implementation. For example, the HDS implementation is called
TrueCopy
Hitachi Data Systems (HDS) was a provider of modular mid-range and high-end computer data storage systems, software, and services. Its operations are now a part of Hitachi Vantara.
In 2010, Hitachi Data Systems sold through direct and indirect ...
. EMC also provides a similar capability on their VPLEX platforms called "MirrorView".
PPRC can be used to provide very fast data recovery due to failure of the primary site.
In IBM
zSeries
IBM Z is a family name used by IBM for all of its z/Architecture mainframe computers.
In July 2017, with another generation of products, the official family was changed to IBM Z from IBM z Systems; the IBM Z family will soon include the newes ...
computers with two
direct access storage device
A direct-access storage device (DASD) (pronounced ) is a secondary storage device in which "each physical record has a discrete location and a unique address". The term was coined by IBM to describe devices that allowed random access to data, th ...
(DASD) control units connected through dedicated connections, PPRC is the protocol used to mirror a DASD volume in one control unit (the primary) to a DASD volume in the other control unit (the secondary).
In the
IBM SAN Volume Controller
The IBM SAN Volume Controller (SVC) is a block storage virtualization appliance that belongs to the IBM System Storage product family. SVC implements an indirection, or "virtualization", layer in a Fibre Channel storage area network (SAN).
Arch ...
PPRC is used to mirror a virtualized storage volume to remote (or the same) cluster.
PPRC is also referred to as Metro Mirror when comparing to
Global Mirror
Global Mirror is an IBM technology that provides data replication over extended distances between two sites for business continuity and disaster recovery. If adequate bandwidth exists, Global Mirror provides a recovery point objective (RPO) of as l ...
.
See also
*
Storage replication
Replication in computing refers to maintaining multiple copies of data, processes, or resources to ensure consistency across redundant components. This fundamental technique spans database management system, databases, file system, file systems, a ...
*
Hitachi TrueCopy
Hitachi Data Systems (HDS) was a provider of modular mid-range and high-end computer data storage systems, software, and services. Its operations are now a part of Hitachi Vantara.
In 2010, Hitachi Data Systems sold through direct and indirect ...
*
Extended Remote Copy
Extended Remote Copy or XRC is an IBM zSeries and System z9 mainframe computer technology for data replication. It combines supported hardware and z/OS software to provide asynchronous replication over long distances. It is complementary to IBM' ...
*
Global Mirror
Global Mirror is an IBM technology that provides data replication over extended distances between two sites for business continuity and disaster recovery. If adequate bandwidth exists, Global Mirror provides a recovery point objective (RPO) of as l ...
*
Copy Services
Replication in computing refers to maintaining multiple copies of data, processes, or resources to ensure consistency across redundant components. This fundamental technique spans databases, file systems, and distributed systems, serving to impro ...
*
Norton Ghost
GHOST (an acronym for ''general hardware-oriented system transfer''), now called Symantec™ GHOST Solution Suite (GSS) for enterprise, is a disk cloning and backup tool originally developed by Murray Haszard in 1995 for Binary Research. Th ...
* EMC
SRDF (Symmetrix Remote Data Facility)
*
Microsoft
Microsoft Corporation is an American multinational corporation and technology company, technology conglomerate headquartered in Redmond, Washington. Founded in 1975, the company became influential in the History of personal computers#The ear ...
Windows Server 2016
Windows Server 2016 is the eleventh major version of the Windows NT operating system produced by Microsoft to be released under the Windows Server brand name. It was developed alongside Windows 10 and is the successor to the Windows 8.1-based ...
Storage Replica
References
{{DEFAULTSORT:Peer To Peer Remote Copy
IBM mainframe technology
Storage software