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A quick introduction to SANs and Panasas ActivStor Kevin Haines, eScience Centre, STFC, RAL.

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Presentation on theme: "A quick introduction to SANs and Panasas ActivStor Kevin Haines, eScience Centre, STFC, RAL."— Presentation transcript:

1 A quick introduction to SANs and Panasas ActivStor Kevin Haines, eScience Centre, STFC, RAL

2 WikiPedia defines a SAN: A storage area network (SAN) is an architecture to attach remote computer storage devices (such as disk arrays, tape libraries, and optical jukeboxes) to servers in such a way that the devices appear as locally attached to the operating system.storage area network

3 Its like a LAN... SAN Topology Host/HBA 1 Host/HBA 2 Host/HBA 3 Storage 1 SAN Switch Storage 2

4 Storage 1 SAN Switch Storage 2 Host/HBA 1 Host/HBA 2 Host/HBA 3 Its like a LAN... it has a switch... SAN Topology

5 Storage 1 SAN Switch Storage 2 Host/HBA 1 Host/HBA 2 Host/HBA 3 Its like a LAN... it has a switch, and network cards. SAN Topology

6 Storage 1 SAN Switch Storage 2 Host/HBA 1 Host/HBA 2 Host/HBA 3 Its like a LAN... it has a switch, and network cards. SAN Topology

7 Its like a LAN...but a little different. SAN Topology Storage 1 SAN Switch Storage 2 Host/HBA 1 Host/HBA 2 Host/HBA 3 Fibre Connectors 2/4/8Gb/s WWNs InitiatorsTargets

8 Zoning implemented by the switch Controlling Access Zone 1 = HBA1 + Storage1 Zone 2 = HBA2 + HBA3 + Storage 2 Storage 1 SAN Switch Storage 2 Host/HBA 1 Host/HBA 2 Host/HBA 3

9 LD3 LD2 LUN masking on the storage array Controlling Access Zone 1 = HBA1 + Storage1 Zone 2 = HBA2 + HBA3 + Storage 2 Storage 1 SAN Switch LD1 Host/HBA 1 Host/HBA 2 Host/HBA 3 HBA2 HBA3

10 LD3 LD2 LUN masking on the storage array Controlling Access Zone 1 = HBA1 + Storage1 Zone 2 = HBA2 + HBA3 + Storage 2 Storage 1 LD1 Host/HBA 1 Host/HBA 2 Host/HBA 3 HBA2 HBA3 SAN Switch

11 HOST Multipath Increasing Resilience Storage 1 SAN Switch 1HBA 1 SAN Switch 2HBA 2

12 Questions about SANs?

13 Panasas ActivStor

14

15 Director Blades Meta-data and volume management services NFS access gateway

16 Panasas ActivStor Storage Blades Two disks (up to 2TB per blade) 2xGb/s ethernet (failover mode) 11 per shelf (must be managed by DB)

17 Panasas ActivStor Resilience Data is striped across all Storage Blades (RAID5 or RAID1) One or more Storage Blades worth of space reserved for failures System monitoring for pre-emptive actions (Blade Drain) Two or more Director Blades can provide failover for each other

18 Panasas ActivStor Performance DirectFLOW clients Available for most major Linux distributions Directly communicates with Storage Blades RAID computations performed by client ~5000 supported (12000 option)

19 Panasas ActivStor Performance DirectFLOW clients Available for most major Linux distributions Directly communicates with Storage Blades RAID computations performed by client ~5000 supported (12000 option) Results show scalable claim is true RAL: 1.2 GB/s from 22 nodes (2 shelves) RoadRunner: 60GB/s (103 shelves)


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