March 3 add
The SQUID file system is unstable again From 4:30 p.m. to 6:00 p.m. today. We apologize for any inconvenience caused.
We have completed the restoration work and the problem has been resolved.
 

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SQUID file system was unstable from late yesterday to today. As a result, the following problems have occurred. We apologize for the inconvenience.
 
- Unable to login to the front-end server properly
- a results of common Linux commands such as "ls" "mv" etc is delayed.
 
We have just completed the recovery work and the problem has been resolved. We apologize for this inconvenience.
 
Thank you for your cooperation.