Speaker
Description
CephFS is used as the shared file system of the HTC cluster for
physicists of various fields at Bonn University since beginning
of 2018. The cluster uses IP over InfiniBand. High performance
for sequential reads is achieved even though erasure coding and
on-the-fly compression are employed.
CephFS is complemented by a CernVM-FS for software packages and
containers which come with many small files.
Operational experience with CephFS and exporting it via NFS
Ganesha to users’ desktop machines, upgrade experiences, and
design decisions e. g. concerning the quota setup will be
presented.
Additionally, Ceph RBD is used as backend for a libvirt/KVM based
virtualisation infrastructure operated by two institutes
replicated across multiple buildings.
Backups are performed via regular snapshots which allows for
differential backups using open-source tools to an external
backup storage. Via file system trimming through VirtIO-SCSI and
compression of the backups, significant storage is saved.
Writeback caching allows to achieve sufficient performance. The
system has been tested for resilience in various possible failure
scenarios.
| Desired slot length | 20 |
|---|---|
| Speaker release | Yes |
