On our cluster, we provide multiple storage systems, which are optimized for different purposes. On this page, we try to give you an overview on the different storage systems and provide you all the information that is needed to choose the most optimal file system for your purpose. Some of the storage systems are optimized for large files and high performance, whereas others can also deal with small files. Some are for permanent storage of data (homes) whereas the scratch file systems are only for temporary storage of data. Since the available storage space on our clusters is limited and shared between all users, we set quotas in order to prevent single users from filling up an entire storage system with their data. A summary of general questions about file systems and storage can be found in our FAQ. If you have questions or encounter problems with the storage systems provided on our clusters, then please contact cluster support.
Available storage systems
First of all, we would like to start with an overview on the available storage systems in Brutus. The description of the storage systems contains link that redirect you to more detailed wiki pages on these systems.
|Brutus||Mountpoint||Filesystem type||Life span||Max. size||Backup||Purged||Should be used for|
|/cluster/home||NFS (ZFS)||permanent||16 GB||Yes||Never||Important files, medium and large files|
|/cluster/work||Panasas||4 years||100 GB||No||scr[1-6] : files older than 15 days||Parallel I/O, medium and large files (> 10MB)|
|/cluster/scratch_xp||Lustre||4 years||TB||No||public : files older than 15 days||Parallel I/O, large files (> 50MB)|
|/cluster/scratch_xl||Lustre||4 years||407TB||No||No||Parallel I/O, large files (> 50MB)|
|/scratch||ext3 (LOCAL scratch)||job||10GB - 1TB||No||After your job finishes||Single node I/O during a job, small files OK|
Central storage from ID storage
You can buy central NAS shares from the ID storage group. These shares are also accessible on our clusters. When you access your central NAS share on one of our cluster, then it is mounted automatically. Please make sure that the permissions on the NAS share and the NFS export are done properly.
User storage systems
If you have your own NAS storage, managed by yourself, then you can also mount it on our clusters, but we do not provide any support for it. We only support NAS shares that are managed by the ID storage group.