I have setup XRootd cluster in our supercomputer center to distribute and access data from Lustre
filesystem to different systems/places, as setup is one Redirector
and 2x data server
which Lustre filesystem available on all nodes.
XRootd
user id being defined for lustre filesystem so to able to go through directories.
As XRootd service runs with user and group xrootd
it faces permission denied
on folder and files which has no enabled bit for read
on files/folders, e.g.
drwxr-x--- 7 b324025 bb0820 4096 Jan 27 11:34 ISIMIP
also from xrootd.log
ofs_opendir: root.26098:[log in to unmask] Unable to open directory /data/bb0820/ISIMIP; permission denied
The filesystem size is 55PB and thousands of groups there are, and
even adding xrootd user to groups, there are some folder/file which has
no read
enabled bit on group
.
Lustre filesystem gives full control to user root
, is there anyway to run xrootd so to be seen as root to lustre? this way everything become accessible at least for read.
I have seen document guideline for Xrootd configuration that running xrootd with root is not recommended.
I would appreciate any recommendations/suggestion
[1] https://github.com/xrootd/xrootd/issues/1181
Thanks
Amjad
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