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use_io_file_buffering[N]

N=0…9999

Text String

Instructs CHARON-VAX to enable host operating system I/O cache on reading/writing operations.

The following values are possible:

• "true" or "write-back" - the "write back" caching mode is used

• "write-through" - the "write through" caching mode is used

• "false" - caching is switched off

 Note that this caching has a significant effect only in case of mapping to disk and tape containers, not physical drives.

When enabled, host operating system I/O cache may significantly improve I/O performance of the virtual system. At the same time maintaining I/O cache requires additional host resources (CPU and memory) which may negatively affect overall performance of the virtual system.

Initially is set to "false".

Example: