I am looking at the patch to ROMIO to support the new Progressive File Layout feature:
https://jira.whamcloud.com/browse/LU-9657 and https://review.whamcloud.com/#/c/27869/10 This change greatly reworks ROIMIO's support for determining striping count and stripe size. I'm all for using the 'llapi_layout' routines instead of bare ioctl() calls, but llapi_layout did not show up until 2.7 I think. Is there any chance that some enviroment out there is still running a lustre from 2014 or earlier? Nothing before 2.10 shows up in the "community matrix" https://wiki.whamcloud.com/display/PUB/Lustre+Support+Matrix but I do see some fairly old versions in the "intel releases" https://wiki.whamcloud.com/display/PUB/Lustre+Support+Matrix+-+Intel+Releases ==rob
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