Devices for the device array

On a data-load job, each device runs independently of other devices. Thus mixing fast and slow devices does not adversely affect the speed of the load.

In most unload jobs, all devices receive equal amounts of data. Thus the speed of all devices is limited by the speed of the slowest device. If you have several fast devices and one or two slow devices, it might be advantageous to remove the slow devices.

When CPU resources are plentiful during an HPL job, the device controllers are a potential bottleneck. If you have configured extra converter threads and extra converter VPs, CPU use should be close to 100 percent. If CPU use is not close to 100 percent, the cause might be one of the following situations:
  • The device controller is managing too many devices.
  • The devices themselves are slow.

Copyright© 2018 HCL Technologies Limited