IBM Spectrum Protect High Availability with DB2 HADR and ProtecTIER native IP Replication
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by Jörg Walter, Andre Gaschler and Erik Franz
IBM Spectrum Protect (formerly known as Tivoli Storage Manager / TSM) is made to protect business critical data and applications, requiring continuous availability and disaster protection. High available Spectrum Protect infrastructures in conjunction with ProtecTIER’s data deduplication and replication features lead to minimal RTO/RPO times, combined with maximum space efficiency at the same time.
IBM’s ProtecTIER solution offers great data deduplication and replication features which allows for efficient replication of backup data to offsite locations, without the need to move physical tapes. In addition, the following benefits come along with ProtecTIER:
In Spectrum Protect and ProtecTIER backup environments, the ProtecTIER deduplicates and replicates the backup data, while Spectrum Protect manages and replicates the backup catalog (meta data), which is stored on an integrated IBM DB2 database.
This article describes the setup of a multi-site redundancy backup environment using Spectrum Protect together with ProtecTIER. It is based on the experiences we made during a customer implementation and various tests in the ESCC Mainz Storage Systems Lab.
We will give you a short introduction to DB2 HADR feature and to the ProtecTIER solution. Further on, we’ll explain how a multi-site redundant backup environment based on Spectrum Protect together with ProtecTIER is designed.
What is DB2 HADR?
High Availability Disaster Recovery (HADR) is a data replication feature that provides a high availability solution for DB2 databases.
The following list describes why you should think about using DB2 HADR in your Spectrum Protect environment:
Starting with DB2 v10.1, up to three HADR standby databases can be setup for a primary database. This feature is available with Spectrum Protect (TSM) v7.1, which contains DB2 v10.5.
IBM ProtecTIER at a glance
IBM ProtecTIER with Hyperfactor is a software running on Linux, providing in-line data de-duplication features for backup data (e.g. Spectrum Protect, NetBackup, etc.).
IBM ProtecTIER with native IP Replication
IBM ProtecTIER native IP replication provides an option to replicate virtual cartridges (for VTLs) or files (for systems using the File System Interface / FSI) from one ProtecTIER system to another ProtecTIER system via standard TCP/IP networks. Due to a high grade of parallelism, this option allows to move huge amounts of backup data to an offsite location over large distances. Only the deduplicated portion of data is being replicated. The following diagram gives an overview of an IP replication scenario:
Designing a multi-site redundant backup environment
The following diagram shows a three-site replicated backup environment:
The following steps have to be performed to failover TSM and ProtecTIER from DC1 to DC2:
The failback from DC2 to DC1 is the same procedure, vice-versa.
DB2 HADR offers a great approach to replicate a Spectrum Protect server database (the “Meta data”) to one or more (standby) target sites. Combined with the native IP replication feature of the IBM ProtecTIER VTL system, it is possible to build easy-to use, efficient, high available, high capacity and high performance backup solutions, which provide superior Disaster protection at the same time.