[LU-18950] Add nodemap level stats aggregation in Lustre

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: WC Triage
• Reporter: Alex Zhuravlev

Description

something like this:

[root@ai400-003 scratch]# lctl get_param obdfilter.ai400x-OST0002.nodemaps.tenant1.stats
obdfilter.ai400x-OST0002.nodemaps.tenant1.stats=
snapshot_time             1741904244.762785383 secs.nsecs
start_time                1738787388.414456501 secs.nsecs
elapsed_time              3116856.348328882 secs.nsecs
read_bytes                6697353 samples [bytes] 0 16777216 5630008225792 10086969486734262272
write_bytes               3615933 samples [bytes] 1 16777216 1705131880106 9280480319811559058
read                      6697353 samples [usecs] 2 2214659 9784666181 363154428213573
write                     3615933 samples [usecs] 8 64666 1176471638 3886867217966
getattr                   53730731 samples [usecs] 0 7981547 115009486 139542119139536
setattr                   6060816 samples [usecs] 2 945852 566879890 24428465307790
punch                     61 samples [usecs] 9 114 1819 80445
sync                      7458121 samples [usecs] 0 1322206 1339277777 13339666196087
statfs                    24 samples [usecs] 0 15 45 321
set_info                  141 samples [usecs] 5 26 1895 27969