CESNET's hierarchical data storage in Brno available

CESNET's hierarchical data storage in Brno available

Hierarchical data storage (HSM) in Brno is now directly accessible from all MetaCenter and CERIT-SC nodes. The storage is mounted in /storage/brno5-archive/home/.

MetaCentrum users obtained a space with a standard 5TB disk quota. The quota can be increased on request. Older data is moved to tapes and MAID.

The properties of the storage make it slightly differ from practices regarding MetaCentrum storage handling:

• Home directory /storage/brno5-archive/home/<login>/ serves to store configuration files only, it has a tiny quota and mustn't be used to keep actual user data. The actual data space is linked from the home directory and can be found under /storage/brno5-archive/home/<login>/VO_metacentrum-tape_tape/. Migration policy in charge ensures that the data is always kept in a redundant manner.
• All the volumes configured on the Jihlava storage facility are mounted in MetaCentrum (including service directories). If you keep your data in another virtual organisation space in Brno, you can access them from MetaCentrum nodes, too.

The storage facility is suitable mainly for archive data storage, i.e., data which is not accessed on regular basis. You're kindly requested not to use it for live data, especially data actively used for computations. The storage is organised in a hierarchical manner. It means the system automatically moves less used data to slower tiers (mainly magnetic tapes and MAID). The data is still available for the user in the file system. It is necessary to keep in mind that access to data unused for a long time may be slower.

The complete storage facility documentation: https://du.cesnet.cz/wiki/doku.php/en/navody/start

The hierarchical storage is operated by the CESNET Data storage department, http://du.cesnet.cz. User support is provided by the standard MetaCenter user support meta@cesnet.cz.