1. Storage review Carmine Cioffi Database Administrator and Developer 3D Workshop, Barcelona (ES), 20-21 April 2009

2. Outline Storage spec and configuration Performance Future plans 2

3. Storage spec and configuration Two disk arrays used by both databases (OGMA, LUGH): –Storage: 2 SAN, 2GBps FC –Single switch SANBOX 5200 2Gb/s –Physical disks available: Array 1: 16 disks SATA 260GB Array 2: 6 disks SATA 550GB –Arrays configured with RAID10 3

4. Storage spec and configuration 4 OGMALUGH FC switch SANBOX 5200 2Gb/s OGMA (407 GB) LUGH (407GB) OGMA (537GB) Disk array 1Disk array 2

5. Storage spec and configuration ASM: –ATLAS: External redundancy Single disk group Two disks: –disk 1 of 407 GB (205 free) –disk 2 of 537 GB (271 free) –LHCb: External redundancy Single disk group One disk 407 GB (337 free) 5

6. Performance MB/sec 6

7. Performance IO/sec 7

8. Performance Latency 8

9. Future Plans 9 OGMALUGH FC switch 1 SANBOX 5200 2Gb/s Disk array 1 LUGH OGMA FC switch 2 SANBOX 5602 4Gb/s Disk array 2 mirror LUGH OGMA ASM mirroring

10. Future Plans Two disk arrays used by all or systems except TAG: –Storage: –2 SAN, 2GBps FC –? (third disk array) –two switches: SANBOX 5200 2Gb/s SANBOX 5602 4Gb/s –Physical disk available: Array 1: 16 disks SATA 260GB (backup) Array 2: 6 disks SATA 550GB ? (storage) Array 3:? (storage) –Arrays configured with RAID5 or RAID6 10

11. Future Plans ASM: –ATLAS: Normal redundancy Single disk group two fail groups Two or more disks Mirror disks on different disk array –LHCb: Normal redundancy Single disk group two fail groups Two or more disks Mirror disks on different disk array 11

12. Migration date estimation ATLAS by mid June LHCb by the end August