Here are some benchmarks for PPA Lustre filesystem that was upgraded in March 2014. 

• Lustre server version 2.5.1 on RHEL6.5
• 1 MDS and 8 OSS servers using Dell R610 systems
• Four LSI Engenio (Dell MD3260) arrays with dual-redundant controllers
• 16 OSTs using RAID6 12+2 LUNs
• ~344TB of usable capacity
• 10Gb ethernet links to SLAC network
• QDR Infiniband links to "bullet" PPA compute cluster