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List:       lustre-discuss
Subject:    [lustre-discuss] Significance of LOV and LLITE metrics
From:       Masudul Hasan Masud Bhuiyan <masud.hasan () nevada ! unr ! edu>
Date:       2019-03-26 6:19:13
Message-ID: CAKWBw8CAy1yjN94k-t5n9eXAL=WRLxTHjSjeUXE1fj3aksOtSQ () mail ! gmail ! com
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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?

[Attachment #5 (text/html)]

<div dir="ltr"><div>Hi, <br></div><div>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? <br><br><div>           \
<br></div><div>lazystatfs               <br></div><div>site<br>checksum_pages         \
<br></div><div>lmv                   <br></div><div>statahead_agl          \
<br></div><div>lov                  <br>default_easize                    \
<br></div><div>statahead_running_max<br>dump_page_cache           \
<br></div><div>max_easize               \
<br></div><div>statahead_stats<br>extents_stats                    <br>fast_read      \
<br></div><div>stats_track_gid    <br></div><div>nosquash_nids           \
<br></div><div>stats_track_pid           <br></div><div>offset_stats               \
<br></div><div>stats_track_ppid<br>fstype               <br></div><div>pio            \
<br></div><div>unstable_stats           <br></div><div>read_ahead_stats           \
<br>root_squash               <br></div><div>xattr_cache           \
<br></div><div>sbi_flags<br><br></div><div>also whats the difference between \
kbytesavail and kbytesfree in the contest of lustre? <br></div></div><br></div>



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