Peer to Peer Remote Copy or PPRC is a protocol to replicate a storage volume to another control unit in a remote site. Synchronous PPRC causes each write to the primary volume to be performed to the secondary as well, and the I/O is only considered complete when update to both primary and secondary have completed. Asynchronous PPRC will flag tracks on the primary to be duplicated to the secondary when time permits.

PPRC is also the name IBM calls their implementation of the protocol for their storage hardware. Other vendors have their own implementation. For example the HDS implementation is called TrueCopy.

PPRC can be used to provide very fast data recovery due to failure of the primary site.

In IBM

IBM

International Business Machines Corporation or IBM is an American multinational technology and consulting corporation headquartered in Armonk, New York, United States. IBM manufactures and sells computer hardware and software, and it offers infrastructure, hosting and consulting services in areas...

 zSeries

ZSeries

IBM System z, or earlier IBM eServer zSeries, is a brand name designated by IBM to all its mainframe computers.In 2000, IBM rebranded the existing System/390 to IBM eServer zSeries with the e depicted in IBM's red trademarked symbol, but because no specific machine names were changed for...

 computers with two direct access storage device

Direct access storage device

In mainframe computers and some minicomputers, a direct access storage device, or DASD , is any secondary storage device which has relatively low access time relative to its capacity....

 (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

IBM SAN Volume Controller

In computer data storage, the IBM SAN Volume Controller 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 .- Architecture :SVC is always deployed as a...

 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

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 an recovery point objective of as low as 3-5 seconds between the two sites at extended...

.

See also

• Storage replication
• Hitachi TrueCopy
  Hitachi TrueCopy
  Hitachi TrueCopy, formerly known as Hitachi Open Remote Copy or Hitachi Remote Copy or Hitachi Asynchronous Remote Copy , is a remote mirroring feature from Hitachi storage arrays available for both open systems and IBM z/OS...
  
  
• Extended Remote Copy
  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...
  
  
• Global Mirror
  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 an recovery point objective of as low as 3-5 seconds between the two sites at extended...
  
  
• Copy Services
• Norton Ghost
• EMC SRDF
  SRDF
  SRDF is a family of EMC products that facilitates the data replication from one Symmetrix storage array to another through a Storage Area Network or IP network....
  
  (Symmetrix Remote Data Facility)