You should look at the IOC_MDC_GETFILEINFO ioctl. "Example" usage can
be found in
lustre-release/lustre/utils/liblustreapi.c::get_lmd_info_fd().
There currently isn't a convenient liblustre API call for it. It
doesn't poll the OSTs, it just grabs info from the MDT, so it will do
fewer RPCs.
On 4/24/19 12:05 PM, Harms, Kevin wrote:
> Does Lustre provide an optimized stat("filename", ...) that requires fewer
> RPCs than fd=open("filename", ...); stat(fd); ? If so, are there any
> descriptions of this optimization?
>
> thanks,
> kevin
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> lustre-discuss@lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
--
Nathaniel Clark
Senior Software Engineer
Whamcloud / DDN
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