IBM Cluster for GPFS Fileserver
The Juelich Storage Cluster (JUST) consists of two parts due to different stages of expansion.
- One part called JUST4 are the storage systems installed in January 2012 with about 4.4 PB gross that are used to store user home data ($HOME) and user archive data ($ARCH).
The second part JUST4-GSS is an expansion of the JUST4 part by new GPFS Storage Server systems (GSS) with a capacity of 12 PB gross . The installation of the first 9.2 PB and test of the limited available version started in January 2013. Mid September 2013 a new generally available fast scratch file system ($WORK) was introduced. At the same time a new special file system ($DATA) dedicated to large projects with big data in collaboration with JSC was built, where disk space quota is available on application at JSC management only.
In June 2014 additional 2.8 PB (gross) GSS storage were installed for future migration of the classical $HOME file systems into GNR based file systems.
|Capacity||4.4 PB gross, |
3.4 PB net
|12 PB gross, |
9.6 PB net
|16.4 PB gross, |
13 PB net
|Disk Enclosures / Drawers||204||412||616|
|Disks||2448||5336 + 126 SSD||7910|
The failure rate for the disks of the complete system is 2-3 disks per week.
JUST Hardware Characteristics