Archive for April, 2021

Romio and MPICH-3.4

April 21st, 2021
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The mpich team released MPICH-3.4 back in January, and MPICH-3.4.1 shortly after that. Relevant ROMIO items from the release:


DAOS driver for ROMIO

April 15th, 2021
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Our friends at Intel contributed an ADIO driver for DAOS . The ROMIO driver name is, simply enough “daos”, so to enable it configure with --with-file-system=daos+ufs+whateverfs and force selection of the DAOS driver with the ‘daos:’ prefix.

The driver uses the ‘DFS’ mapping to the DAOS object model. Doing so lets you access ROMIO-generated files with the POSIX ‘dfuse’ interface.

Setup: For more information about how to set up Pools and Containers, see

Limitations: Like a few other drivers, the DAOS driver does not support shared file pointers, ordered mode collectives, or atomicity.