1. The LOFAR LTA in Jülich AENEAS Kick-off meeting, Den Haag
Oleg Tsigenov

2. The LOFAR LTA in Jülich – Oleg Tsigenov
The LOFAR Long Term Archive in Jülich
dCache golden release(LTS) 2.13 (
1 admin node
PostgreSQL database
1 download node
6 door/pool nodes
GridFTP doors
Read and write pools
Virtual file system tree /pnfs
NFSv4.1 mounted in the door/pool nodes
LOFAR data at Jülich
316 TB disk space
8.5 PB data on tape
1. March 2017
The LOFAR LTA in Jülich – Oleg Tsigenov

3. Data Flow @ LOFAR LTA Jülich RAID 6 Systems
Clients
Internet
Data Flow @ LOFAR LTA Jülich
RAID 6 Systems
ES6600
https
10 Gbps
Door, Pools
Download
Server
GridFTP
Groningen
Private VLAN
Door, Pools
SRM interface
GridFTP
10 Gbps
Admin node
TSM Tape Server
Tape libraries
SL8500
GridFTP
10 Gbps
Effelsberg
Private VLAN
gPlazma
VOMS, Virtual Organization Membership Service
RAID 6 (block-level striping with double distributed parity) provides fault tolerance up to two failed drives. This makes larger RAID groups more practical, especially for high-availability systems. This becomes increasingly important as large-capacity drives lengthen the time needed to recover from the failure of a single drive. Like RAID 5, a single drive failure results in reduced performance of the entire array until the failed drive has been replaced and the associated data rebuilt.
Authentication
Authorization
VOMS Server
@ SURFsara
Tertiary
Interface
1. March 2017
The LOFAR LTA in Jülich – Oleg Tsigenov

4. The LOFAR LTA in Jülich – Oleg Tsigenov
Statistics
1. March 2017
The LOFAR LTA in Jülich – Oleg Tsigenov

5. The LOFAR LTA in Jülich – Oleg Tsigenov
Thanks for you attention!
Questions?
1. March 2017
The LOFAR LTA in Jülich – Oleg Tsigenov