Birmingham

Our Grid Resources

Number of Job Slots: 28
CPU Model: Intel xeon
CPU speed: 2GHz
SpecInt: 756
SpecFloat: 764
RAM: 1024MB
Supported VOs: alice atlas babar biomed calice cms dteam hone ilc lhcb sixt zeus

The Grid part of this farm is down due to ongoing problems with power supplies and several broekn disks.

Answers to GridPP 'Ten Easy Network Questions': Birmingham (10 Questions)

There are three ways to add an extra cluster to an existing LCG site, namely:

Using CPU scaling
- easy to implement, but
- only the CPUs characteristics of the clusters can differ
- the same VOs must be supported on all clusters
- the site information provider does not reflect the true physical caracteristics of the clusters
Adding a new CE
- the most versatile solution
- not neat for a site with many small clusters (for example with 4 clusters with 10 nodes each)
- implemented at Bham, see Addition of a second CE at the BHAM-LCG2 site for instructions
Hosting several clusters under one CE making use the of GLUE sub-cluster attribute
- Ideal for small site with many farms
- allows to enable different VOs on different clusters
- neat use of the GLUE schema, but
- APEL requires to add a prefix to the site name
- got it working, but chose solution 2. for the time being
- I will put some instructions in the wiki for information in the not too distant future

Upgrade to LCG-2_7_0
Fix and add another 40 nodes to the BaBar farm
Integration work of recently deployed LCG-2_7_0 WNs, MON and RB in the Pre-Production Service
Birmingham in Service Challenge 4