PowerVM (Power Virtual Machine):
PowerVM formerly known as Advanced Power Virtualization, it is the virtualization solution for AIX.
PowerVM has 3 editions:
Express Edition: Hypervisor, DLPAR (3 servers), VIO (1 server), IVM, NPIV
Standard Edition: +DLPAR (254 servers), + VIO (2 servers), +HMC, +Multiple Shared Processor Pools, + Shared Storage Pools
Enterprise Edition: ++Active Memory Sharing, ++Live Partition Mobility
Intergrated Virtualization Manager (IVM)
For a smaller environment, not all functions of an HMC are required, and the deployment of additional HMC hardware may not be suitable, so IBM has developed the IVM, a hardware management solution that performs a subset of the HMC features for a single server, avoiding the need for a dedicated HMC server.
IVM manages standalone servers so a second server managed by IVM would have its own instance of the IVM. With the subset of HMC server functionality, IVM provides a solution that enables the administrator to quickly set up a system. The IVM is integrated within the Virtual I/O Server product.
POWER Hypervisor is the foundation of IBM PowerVM. It is a firmware layer sitting between the hosted operating systems and the server hardware, and it is always activated.
It delivers functions that enable capabilities: dedicated or micro partitioning, virtual processors, virtual ethernet- scsi- fibre channel- adapters and virtual consoles.
LPAR - Dedicated processors
Dedicated processors are whole processors that are assigned to dedicated-processor partitions (LPARs). The minimum processor allocation for an LPAR is one (1) whole processor, and can be as many as the total number of installed processors in the server.
Each processor is wholly dedicated to the LPAR. It is not possible to mix shared processors and dedicated processors in the same partition.
Micro-Partitioning is the ability to distribute the processing capacity of one or more physical processors among one or more logical partition.
In POWER5-based servers, a physical shared-processor pool is a set of physical processors that are not dedicated to any logical partition. Micro-Partitioning technology coupled with the POWER Hypervisor facilitates the sharing of processing units between micro-partitions.
Multiple Shared-Processor Pools (MSPPs)is a capability supported on POWE6. This capability allows a system administrator to create a set of micro-partitions with the purpose of controlling the processor capacity that the set of micro-partitions can consume from the physical shared-processor pool. The set of micro-partitions form a unit and this can be managed for example how much processor capacity it can use.
On all Power Systems supporting Multiple Shared-Processor Pools, a default Shared-Processor Pool is always automatically defined. The default Shared-Processor Pool has a pool identifier of zero (SPP-ID = 0) The default behavior of the system, with only SPP0 defined, is the current behavior of a POWER5 server with only a physical shared-processor pool defined. Micro-partitions are created within SPP0 by default, and processor resources are shared in the same way.
If several partitions from different shared processor pools are competing for additional resources, the partitions with the highest weight will be served first. You must therefore define a partition’s weight based on the weight of partitions in other shared processor pools.
Shared Storage Pool
A shared storage pool is a pool of SAN storage devices assigned to multiple Virtual I/O Servers. It is based on a cluster of Virtual I/O Servers. When using shared storage pools, the Virtual I/O Server provides storage through logical units (file backed storage device) that are assigned to client partitions and it appears as a virtual SCSI disk in the client partition. Shared Storage Pools are using thin provisioning.
Storage Pool vs Volume Group
The IVM and HMC environments present 2 different interfaces for storage management under different names. Storage Pool interface under IVM is essentially the same as LVM under HMC. (These are used sometimes interchangeably.) So volume group can refer to both volume groups and storage pools, and logical volume can refer to both logical volumes and storage pool backing devices.
Active Memory Expansion:
Active Memory Expansion is the ability to expand the memory available to an AIX partition beyond the amount of assigned physical memory. Active Memory Expansion compresses memory pages (so it generates CPU load) to provide additional memory capacity for a partition. (It is a Power7 feature.) Starting with POWER7+,memory page compression and decompressionis offloaded to a hardware accelerator.
Active Memory Sharing:
Active Memory Sharing (AMS) enables the sharing of a pool of physical memory among partitions on a single Power server (Power 6 or later), helping to increase memory utilization and drive down system costs.
Active Memory Deduplication:
To optimize memory use, Active Memory Deduplication avoids data duplication in multiple distinct memory spaces. On traditional LPARs, multiple identical data are saved across different positions in main memory. Active Memory Deduplication combines the data in just one physical memory page and frees the other chunks with identical data. The result is multiple logical memory pages pointing to the same physical memory page, thus saving memory space. (It is available on LPARs using Active Memory Sharing.)
Acitive Memory Mirroring:
It is called sometimes system firmware mirroring. Active Memory Mirroring for the hypervisor is designed to mirror the main memory that is used by the system firmware to ensure greater memory availability . When enabled, an uncorrectable error that results from a failure of main memory used by the system firmware will not cause a system-wide outage. The system maintains two identical copies of the system hypervisor in memory at all times.
- FS - LVM
- STORAGE - BACKUP
- UPD. - INSTALL