[lustre-discuss] Significance of LOV and LLITE metrics

Masudul Hasan Masud Bhuiyan masud.hasan at nevada.unr.edu
Mon Mar 25 23:19:13 PDT 2019


Hi,
I am looking for metrics that affect/reflect user I/O performance. So far I
understand OST and MDT metrics are significant.  But is there any other
metrics which get updated during file write/read operation? Mainly I want
to know what is the significance of LOV and LLITE metrics in terms of I/O.
(As LOV is related to client, I think it  might be significant, but not
sure what does it indicate) Also  what do these metrics in LLITE indicate?


lazystatfs
site
checksum_pages
lmv
statahead_agl
lov
default_easize
statahead_running_max
dump_page_cache
max_easize
statahead_stats
extents_stats
fast_read
stats_track_gid
nosquash_nids
stats_track_pid
offset_stats
stats_track_ppid
fstype
pio
unstable_stats
read_ahead_stats
root_squash
xattr_cache
sbi_flags

also whats the difference between kbytesavail and kbytesfree in the contest
of lustre?
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