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Virtual tape data migration by TS7700 Copy Export Function

IP.com Disclosure Number: IPCOM000199294D
Publication Date: 2010-Aug-30
Document File: 5 page(s) / 884K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for migrating the virtual tape data to the remote site.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 46% of the total text.

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Virtual tape data migration by TS 7700 Copy Export Function

When migrating a virtual tape data in the virtual tape device (IBM TS7700) from a local site to a remote site, one of the most standard methods is using Copy Export function.

Since this method was basically developed for a disaster recovery, there have been established procedure of (1) sending the physical tapes (it is called 'Copy Exported Physical Volumes') from a local to a remote site, (2) keeping them in storage at the remote site, and (3) recovering the virtual tape data at the remote site when a disaster occurs at the local site.

In a data center relocation project with the processor renewal and operating system version-up, customers often send the latest data at a certain point to a remote site regularly or irregularly, and carry out the application test by using the data sent from a local site.

However, the Copy Export function is not able to deal with the above-mentioned case. In addition, the Copy Export function is not appropriate for a customer who intentionally makes the dual (primary and secondary) copy of the virtual tape data in a local site. Because the Copy Export function exports the secondary copy to the remote site and deletes the secondary copy in the local site, degrading the data availability.

To solve these problems, the following procedures are added to this disclosure.

- When the recovery process is finished at the remote site, the customer submits the jobs that read all the virtual tape data from the Copy Exported Physical Volumes and write it to the cache, which is to be automatically written to other physical tapes provided in the remote site.

- Then the customer ejects the Copy Exported Physical Volumes, sends them back to the local site, and inserts them to the virtual tape device.

As a result,

- At the remote site, the customer can repeatedly test with the latest tape data at any time.

- At the local site, the secondary copy will be recovered in a few days.

1

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The procedures are as follows.

1. Initial State

Local site Remote site

TS7700 TS7700

01

Cache

A00001 A00002 F00001 F00002

A00001 A00002 F00001 F00002

Primary Pool

02 03

A00001 A00002

F00001 F00002

Secondary Pool Secondary Pool

01

Cache

X00001 X00002

X00001 X00002

Primary Pool

12 13

X00001

X00002

Secondary Pool Secondary Pool

[Local site]
- The customer has one primary pool(01) and two secondary pools (02 & 03) - i.e. Pool 02 is for production volumes and Pool 03 is for test volumes.
- The customer has 4 logical volumes. (A00001,A00002,F00001,F00002)
- Pool 02 is for A00001 & A00002, and Pool 03 is for F00001 & F00002.

[Remote site]
- The customer has one TS7700 and uses it for test purpose at this point.
- The customer has one primary pool(01) and two secondary pools (12 & 13).
- The customer has 2 logical volumes. (X00001,X00002)
- Pool 12 is for X00001 and Pool 13 is for X00002.

2. Copy Export execution

A00001 A00002 F00001 F00002

Local site

Remote site

01

01

Cache

Cache

Secon...