The CDR Data Servers - PADME-Experiment/padme-cdr GitHub Wiki
- The CDR Data Servers
- The CDR Central Server
- CDR Setup
- Starting the CDR service
- Stopping the CDR service
- GRID Proxies
- CDR Tools
- The KLOE Tape Library
PADME data can be stored into 4 different storage systems:
1. DAQ data servers
These are two data servers directly connected to the PADME DAQ system, each providing 19TB of RAID6 disk space. From the LNF network they are known as l1padme3 with ip address 193.206.82.206 and l1padme4 with ip address 193.206.82.205 (for completeness, when seen from the online network, l1padme3 corresponds to l1padme1 and l1padme4 to l1padme2).
All DAQ data are initially stored on these two nodes in rawdata format. These data are routinely deleted after the data are copied to the other (more permanent) storage systems in order to free space for the DAQ.
Within CDR the DAQ data servers are identified as DAQ_l1padme3 and DAQ_l1padme4.
2. LNF Tier2 storage system
This is a GRID-enabled disk-based storage system connected to the Tier2 at the INFN LNF. Here PADME has a dedicated 280TB disk area, identified as LNF, which can be used as a temporary buffer for event reconstruction, Monte Carlo production, and data transfer plus an additional "scratch" area, identified as LNF2, of 100TB.
3. CNAF tape library
This is the primary GRID-enabled tape-based storage system for the PADME experiment. It is located at the INFN CNAF Tier1 system in Bologna. Here PADME has a dedicated >1PB tape volume where all data (rawdata, recodata, mcdata, ...) produced by the collaboration are copied for permanent storage. Within CDR it is identified as CNAF.
4. CNAF disk area
This is a GRID-enabled disk-based storage system located at the INFN CNAF Tier1 site in Bologna. Here PADME has a dedicated 100TB disk area, identified as CNAF2, which can be used as a temporary buffer for event reconstruction, Monte Carlo production, and data transfer.
5. KLOE tape library
This is the secondary non-GRID-enabled tape-based storage system for the PADME experiment. It is located by the KLOE experiment at the INFN LNF. Here PADME has a dedicated >500TB tape volume where all rawdata produced by the collaboration are copied as an emergency backup in case of faults at the CNAF tape library. Within CDR it is identified as KLOE.