3.3.6 CVMFS storage
3.3.6.1 CVMFS overview
The CernVM File System provides a scalable,It was developed to assist High Energy Physics (HEP) collaborations to deploy software on the worldwide-distributed computing infrastructureCernVM-FS is implemented as a POSIX read-only file system in user space (a FUSE module). Files and directories are hosted on standard web servers and mountedIn the universal namespace/CVMFS. The software can be read by user jobs to ensure the normal operation of cluster jobs.
3.3.6.2 CVMFS software warehouse overview
CVMFS system currently has 6 software volumes, providing software environment for different experiments. Detailed volume information is shown in Table 1：
| Path | Use |
|---|---|
| /cvmfs/bes.ihep.ac.cn | Provide software libraries for bes experiment |
| /cvmfs/bes3.ihep.ac.cn | Provide software libraries for bes3 experiment |
| /cvmfs/cepc.ihep.ac.cn | Provide software libraries for cepc experiment |
| /cvmfs/dcomputing.ihep.ac.cn | Provide software libraries for distributed computing |
| /cvmfs/exo.ihep.ac.cn | Provide software libraries for exo experiment |
| /cvmfs/gluex.ihep.ac.cn | Provide software libraries for gluex experiment |
| /cvmfs/heps_ap.ihep.ac.cn | Provide software libraries for HEPS experiment |
| /cvmfs/hxmt.ihep.ac.cn | Provide software libraries for HXMT experiment |
| /cvmfs/juno.ihep.ac.cn | Provide software libraries for juno experiment |
| /cvmfs/lhaaso.ihep.ac.cn | Provide software libraries for lhaaso experiment |
| /cvmfs/lqcd.ihep.ac.cn | Provide software libraries for lqcd experiment |
| /cvmfs/raq.ihep.ac.cn | Provide software libraries for raq experiment |
Table1 overview of CVMFS software volumes
Overview of the public volume
The CVMFS system currently has one public volume, providing public software storage for users. Detailed information is show in Table 3
| Path | Use |
|---|---|
| /cvmfs/common.ihep.ac.cn | Common scripts and software of the system group |
Table 2 Overview of the public volume
3.3.6.3 CVMFS software repositories access methods
The CVMFS software volume is mounted in autofs mode, with read-only permissions and full path