PowerHA SystemMirror for i overview
After you determine your business goals and requirements, you need to choose the right IBM i high availability solution that fits your business needs.
IBM PowerHA System Mirror for i provides end-to-end integrated clustering solutions for high availability (HA) and disaster recovery (DR). PowerHA is an integrated extension of the IBM i operating system and offers environmental, application, and data resiliency solutions for managing access and storage in the event of planned or unplanned outages.
The automation features of PowerHA, its management interface, and seamless
integration with the IBM i operating system means that PowerHA can provide HA and DR management for
a wide array of IBM i based systems and storage solutions. These include:
- Geographic Mirroring
- A Geographic mirror is a system-based solution capable of providing either synchronous or asynchronous transmission options. This replication solution is not dependent on any particular type of storage technology.
- Metro Mirroring
- A Metro mirror solution is a synchronous copy services function that manages supported external storage units. This provides hardware-level replication of Independent auxiliary storage pools (IASPs) from one cluster node to another.
- Global Mirroring
- The Global mirror is an asynchronous copy services function that manages supported external storage units. This provides hardware-level replication of Independent auxiliary storage pools (IASPs) from one cluster node to another.
- Switched logical units
- Logical unit (LUN) switching switches a supported external storage unit connection between two systems in a cluster to move an IASP from one cluster node to another.
- DS8000 HyperSwap and PowerHA
- HyperSwap® is a full system solution that allows for logical units that are mirrored between two IBM System Storage DS8000 units. PowerHA provides an interface to manage either Full System HyperSwap or HyperSwap configured at the IASP level.
- FlashCopy and PowerHA
- FlashCopy is a function of the IBM System Storage server. FlashCopy provides a fast point-in-time copy of data that can be stored, used, or brought online on a separate partition or system. FlashCopy can be used together with other data resiliency technologies and managed with PowerHA.
For additional information about IBM PowerHA System Mirror for i, see IBM Docs section, Implementing high availability or visit the PowerHA Wiki.