Storage¶
Network File Systems¶
The following mount points are available and shared among all nodes.
Summary¶
Available NFS mount points:
| Path | Hosted by | Disk | Capacity | Mount mode | Comments |
|---|---|---|---|---|---|
/mnt/nfs/ |
front.dalek |
Samsung SSD 990 PRO | 4 TB | RW | Contains user homedirs (/mnt/nfs/users) and software (/mnt/nfs/software ). Backup every day on front.dalek in /mnt/bkp/nfs. |
/mnt/raid1/meteors |
nas.dalek |
2x Seagate Barracuda (RAID1) | 16 TB | RO | Required to be in the meteor group. |
/mnt/raid1/workspace |
nas.dalek |
2x Seagate Barracuda (RAID1) | 16 TB | RW | Required to be in the meteor group. |
/mnt/data/ |
nas.dalek |
Samsung SSD 990 PRO | 4 TB | RW | Contain AI models (/mnt/data/ai-models). |
Frontend¶
The frontend node (front.dalek) provides an NFS mount point at /mnt/nfs/,
hosted on a Samsung SSD 990 PRO 4 TB disk. The main directories are:
/mnt/nfs/users: user home directories/mnt/nfs/software: installed software (primarily managed via Environment Modules)/mnt/nfs/install: configuration files for automatic node installation
This SSD is backed up every night to another Samsung SSD 990 PRO 4 TB. Backups
are stored on the frontend node and accessible at /mnt/bkp/nfs (but only
from front.dalek). Users can browse and restore files from the latest backup
(typically from the previous day).
NAS¶
The NAS node (nas.dalek) also provides several NFS mount points. The first
resides on two 16 TB HDDs configured in RAID 1, exposing:
/mnt/raid1/meteors: a read-only directory containing meteor video sequences (accessible only to users in themeteorgroup)/mnt/raid1/workspace: a read-write directory for working with meteor datasets (also restricted to themeteorgroup)
Additionally, nas.dalek hosts a Samsung SSD 990 PRO 4 TB disk mounted at
/mnt/data/ and available via NFS. For now it mainly contains AI models:
/mnt/data/ai-models: readable by all users, but write access is restricted to members of theai-modelsgroup.
Local¶
Each node is equipped with a SSD drive. Depending on the partition here are the specifications:
| Partition | SSD | Size |
|---|---|---|
az4-n4090 |
Samsung SSD 990 PRO | 4 TB |
az4-a7900 |
Samsung SSD 990 PRO | 2 TB |
iml-ia770 |
Kingston SSD OM8PGP41024Q-A0 | 1 TB |
az5-a890m |
Crucial SSD P3 Plus CT1000P3PSSD8 | 1 TB |
An ext4 partition of 250 GB is reserved for the operating system and is not
available to users.
Scratch¶
The remaining disk space is allocated to a "scratch" partition mounted at
/scratch (ext4 filesystem). Each time a user connects to a node, a
/scratch/$USER directory is automatically created if it does not already
exist. Unlike a typical scratch filesystem, on Dalek these directories persist
on the node; however, they are not backed up. Therefore, users should avoid
storing sensitive data there.