12.1 BESIII¶

12.1.1 Computing Services¶

In local cluster, there are about 7,000 CPU cores and 2.4PB storage belonging to BESIII.

account for computing cluster

Please see chapter 2. We will create the afs account when the application is approved by the BES contact person;

job submission and management

Please see the descriptions for BESIII in section 3.2.2.2;

The webpage for BESIII computing environment and software: https://docbes3.ihep.ac.cn/

Moreover, we also provide distributed computing service to BESIII users (please see the chapter for distributed computing).

12.1.2 Storage¶

Each BES user has several personal directories, as shown in the following table. The quota of the file size and file numbers are different for each directory.

Directory	Quota of size/NO. of files	Quota querying	Utility
/afs/ihep.ac.cn/users/username	500MB/none	fs listquota /afs/ihep.ac.cn/users/username	Personal files and software
/workfs/bes/username	5GB/50,000	lfs quota -u username /workfs	Personal files and software
/scratchfs/bes/username	500GB/none（keep for 2 weeks）	lfs quota -u username /scratchfs	Personal temporary files
/besfs/users/username	50GB/300,000		Personal data files
/home/bes/userdata/username	200MB/none	quota -u username	Personal files

Besides the personal directories, there are additional storage for BES. Only the owner of these directories is able to write data there. The details can be found via https://boss.ihep.ac.cn/

12.1.3 Attentions¶

/home/bes/ is used only for personal software and small files. Do not store physics data there, and do not access data files in this directory from large numbers of jobs, otherwise other users may be affected.
/afs and /workfs are used for users' valuable files. They are used for users' personal software and code. These 2 directories can be accessed on login nodes with no limit, but they are read only on computing nodes. Please do not write data or logs in these directories in your jobs, or else the jobs will be failed. Please see section 3.2.2 for the job logs.
More information can be found at https://boss.ihep.ac.cn/ for the computing environment and offline software.

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