[Lustre-discuss] File Content change without Error log

Lu Wang wanglu at ihep.ac.cn
Mon Mar 30 21:15:57 PDT 2009


Dear  all,
     There are more than 100 files demaged recently without any error logs on OSS. The demaged files has same size with their original copys in our backup system. However, the chksum changed. For example,
#ll run_0008126_All_file015_SFO-1.raw.353645 
-rw-r--r--  1 chyd u07 2108082156 Mar 31 10:07 run_0008126_All_file015_SFO-1.raw.353645 
# ll demaged 
-rw-r--r--  1 root root 2108082156 Mar 31 11:19 demaged

# cmp run_0008126_All_file015_SFO-1.raw.353645 demaged 
run_0008126_All_file015_SFO-1.raw.353645 demaged differ: byte 16777217, line 118663

# adler32 run_0008126_All_file015_SFO-1.raw.353645 
adler32(run_0008126_All_file015_SFO-1.raw.353645) = 3653083401, 0xd9bda109
#adler32 demaged 
adler32(demaged) = 195426776, 0xba5f9d8
PS:
1.The modifiy time of these demaged files are same as the time they copied to Lustre. 
2.There is no abnormal signals in OSS logs. 
3. All the OSSs,MDSs works well. 

 Has anyone met this problem? Any ideas? 





Best Regards
Lu Wang
--------------------------------------------------------------	     			
Computing Center
IHEP							Email: Lu.Wang at ihep.ac.cn							
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