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CMS Space Monitoring

This segment introduces the T2, T3 of the Beijing site space usage monoitring.

goals

1.help administrators control the usage and distribution of T3 and T2 space
2.help users know the space status before doing the subscription in PhEDEx and moving dataset between T3 and T2
3.help users and administrators know the subscription status in the PhEDEx and clean up the occupied space in time. It become more necessary when more and more storage resources are added
4.easy to find the discrepancy between the site space information and the information from the CMS central publishing system
5.find a way to count the correct space information in order to cope with the bug from dCache NFS system.When the file size >2GB, the space information can not correctly be displayed,only srmls works

functions

1.Display T2 space usage
T2: name, directory, size, remark
2.Display T3 space usage in cmsd01 and cmsd02
T3: name, directory, size, remark
3.Display the PhEDEx subscription information
PhEDEx subscription: requestor, the LFN of dataset or block, size, the time when the data is created, remark

policies

1. Automatically use system commands and SRM commands to count the amount of space usage once or twice each day.
2. Automatically collect information from the PhEDEx system
3. The information is outputted in XML format and displayed in web page
4. The tools used here:du,df,srmls,wget
5. The language used here: perl, xml, xsl

space monitoring link

http://cmsui01.ihep.ac.cn/space_mon/space_BJ.xml

*Please feel free to give some comments.

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Topic revision: r3 - 2008-06-26 - ZhangXiaomei
 
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