Checkpoint algorithm is generally divided into two kinds: uncoordinated and coordinated.
In the checkpoint algorithm uncoordinated when, each process can independently decide to save their own state carved, the disadvantage is easy to produce a domino effect mantle. Each process needs to maintain multiple inspection checkpoint files, wasting a lot of work has been done and a lot of storage space.
In coordination checkpoint algorithm , the process requires multiple checkpoints set up cooperatively to achieve a global state consistent, to avoid a domino effect, and it only requires each process in maintaining a stable store seven permanent checkpoints, reducing storage overhead.
The fault tolerant system based on recovery message log and checkpoints in the same volume, blocking access to secure memory, and when the checkpoint is the most important checkpoint overhead therewith than, smaller communication overhead.
Intelligent Platform Management Interface (IPMI, Intelligent Platform Management Interface) is managed based on an industry standard peripherals enterprise systems used in the Intel architecture employed, the user can use physical health monitoring server IPMI features, such as temperature, voltage, fan working status, power status. The standard customized by the US Intel, HP (Hewlett-Packard), NEC, US companies such as Dell and SuperMicro. The new version is IPMI2.0 (http://www.intel.com/design/servers/ipmi/).
