[LU-15361] lfs df output is incorrect

• Status: Resolved
• Project: Lustre
• Affects Version/s: Lustre 2.12.4
• Type: Bug
• Priority: Minor
• Reporter: Jiahao Li
• Assignee: WC Triage
• Resolution: Duplicate
• Epic/Theme: client
• Severity: 3
• Epic: client

Description

When multiple threads use lfs df concurrently, some commands return incorrect results

cat df_test.sh 
#!/bin/bashfor i in {1..3}; do
    lfs df /mnt/lustre >> /tmp/lfsdf/lfs_df${i} &
done 

 

cat /tmp/lfsdf/lfs_df2
UUID                   1K-blocks        Used   Available Use% Mounted on
jiahtest-MDT0000_UUID           0           0           0   0% /mnt/lustre[MDT:0]
jiahtest-MDT0001_UUID           0           0           0   0% /mnt/lustre[MDT:1]
jiahtest-MDT0002_UUID           0           0           0   0% /mnt/lustre[MDT:2]
jiahtest-MDT0003_UUID           0           0           0   0% /mnt/lustre[MDT:3]
jiahtest-MDT0004_UUID           0           0           0   0% /mnt/lustre[MDT:4]
jiahtest-MDT0005_UUID           0           0           0   0% /mnt/lustre[MDT:5]
jiahtest-MDT0006_UUID           0           0           0   0% /mnt/lustre[MDT:6]
jiahtest-MDT0007_UUID           0           0           0   0% /mnt/lustre[MDT:7]
jiahtest-OST0005_UUID           0           0           0   0% /mnt/lustre[OST:5]
jiahtest-OST0007_UUID           0           0           0   0% /mnt/lustre[OST:7]
jiahtest-OST0018_UUID           0           0           0   0% /mnt/lustre[OST:24]
jiahtest-OST001a_UUID           0           0           0   0% /mnt/lustre[OST:26]
jiahtest-OST0021_UUID           0           0           0   0% /mnt/lustre[OST:33]
jiahtest-OST0025_UUID           0           0           0   0% /mnt/lustre[OST:37]
jiahtest-OST0027_UUID           0           0           0   0% /mnt/lustre[OST:39]
jiahtest-OST0030_UUID           0           0           0   0% /mnt/lustre[OST:48]
jiahtest-OST0105_UUID  1453120284   593239236   786464344  43% /mnt/lustre[OST:261]
jiahtest-OST0107_UUID  1453120284   600055700   779647880  44% /mnt/lustre[OST:263]
jiahtest-OST0118_UUID  1453120284   600927244   778776336  44% /mnt/lustre[OST:280]
jiahtest-OST011a_UUID  1453120284   565686476   814017104  42% /mnt/lustre[OST:282]
jiahtest-OST0121_UUID  1453120284   565681484   814022096  42% /mnt/lustre[OST:289]
jiahtest-OST0125_UUID  1453120284   565690748   814012832  42% /mnt/lustre[OST:293]
jiahtest-OST0127_UUID  1453120284   565681788   814021792  42% /mnt/lustre[OST:295]
jiahtest-OST0130_UUID  1453120284   565919992   813783588  42% /mnt/lustre[OST:304]filesystem_summary:  11624962272  4622882668  6414745972  42% /mnt/lustre

Use wireshark to analyze the data packet and found that there is no 0 value in the statfs returned by mds. It is estimated that there is a problem with the client

 
有道词典
muzitest-MDT000 ...详细X
　　muzitest-MDT0004_UUID 0 0 0 0% / mnt /光泽(联合化疗:4) 　　muzitest-MDT0005_UUID 0 0 0 0% / mnt /光泽(联合化疗:5) 　　muzitest-MDT0006_UUID 0 0 0 0% / mnt /光泽(联合化疗:6) 　　muzitest-MDT0007_UUID 0 0 0 0% / mnt /光泽(联合化疗:7)

Issue Links

• duplicates: LU-13296 statfs isn't work properly with MDT s...

Comments

[Andreas Dilger]

This is fixed in the 2.12.5 client.