NEC Cluster Disk Storage (laki + laki2)

HOME Directories

All user HOME directories for every compute node of the cluster are located on the distributed NEC GFS, shared with the NEC SX8 and NEC SX9 Cluster. The compute nodes and login node (frontend) have the HOME directories mounted via NFS. On every node of the cluster the path to your HOME is the same. The filesystem space on HOME is limited by a quota! Due to the limited network performance, the HOME filesystem is not intended for fast I/O and for large files!

SCRATCH directories

For large files and fast I/O, please use

• lustre

It's a fast distributed cluster filesystem using the infiniband network infrastructure. This filesystem is available on alle nodes and on the frontend/loging nodes. The capacity is ~240TByte, the bandwith is about 2 GB/sec. The system consists of 2 MDS servers, 4 OSS servers and 24 OST storage targets, each of them one RAID6 lun, 8+PQ, 12 OSTs of 1TB and 12 OSTs of 2 TB disks.

You are responsible to obtain it from the system. To get access to this global scratch filesystems you have to use the [workspace mechanism].

Filesystem Policy

IMPORTANT! NO BACKUP!! There is NO backup done of any user data located on HWW Cluster systems. The only protection of your data is the redundant disk subsystem. This RAID system is able to handle a failure of one component. There is NO way to recover inadvertently removed data. Users have to backup critical data on their local site!