Storage Primer

Storage Primer Sriram Ranganathachari

What is Storage ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Evolution of Storage Performance/Reliability/Management Time/Complexity Storage Today Ethernet Internal Storage Direct-Attach Storage (DAS) Network-Attached Storage (NAS) Storage Area Network (SAN)

Need For the Invention of SAN ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Disadvantages of SCSI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Advantages of SAN over SCSI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Some more benefits ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Fundamental difference between SAN and NAS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is Fibre Channel ? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How SAN works ,[object Object],[object Object],[object Object]

Who should buy SAN ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SAN Segments ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

SAN Components HBA CARD Tape Library Fibre Cables Storage Arrays

Naming and Addressing Scheme ,[object Object],[object Object],[object Object],[object Object]

SAN Topologies ,[object Object],[object Object],[object Object]

Point to Point Topology ,[object Object],[object Object],[object Object],[object Object]

Arbitrated Loop Topology ,[object Object],[object Object],[object Object],[object Object]

FC - Switched Multi Switch Single Fabric Single Switch Fabric Array Array Array Array Array Array Array Array

Deployment: Switches vs. Directors Director Director Director Director Director Director 8–64 64–256 256–1024 Least Complexity Highest Availability Lowest Acquisition Cost Number of Hosts Switch Switch Switch Switch Switch Switch

Ports ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

iSCSI ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

ZONING Definition :Zoning is a logical separation of traffic between host and resources Advantages of Zoning · Data Integrity · Security · Shorter boot-up Types of Zoning : Soft zoning or name server zoning : done using a name server databases in the SAN director. Zoning is via port numbers and WWN numbers. Hard zoning : Uses a routing table in the director, which assigns devices to zones only by WWN. This is more limited since it doesn't take the port number into consideration, which makes it harder to shift devices between ports.

ISL - Distance and Cables ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Multi-mode 1Gb=500m 2Gb=300m Single-mode > 10Km DWDM < 200Km >10km >10km 1Gbps 2Gbps 9 micron Single mode ~300m ~150m 1gbps 2Gbps 62.5 micron Multimode 500m 300m 1Gbps 2Gbps 50 micron Multimode Operating Distance Port Speed Fibre Optic Glass Filament Core

DWDM ,[object Object],[object Object],[object Object],Transmission on fibre Combining Signals Separating Signals Transmitters Receivers

Data Protection ,[object Object],[object Object],[object Object],[object Object]

Some terminologies ,[object Object],[object Object],[object Object],[object Object]

Replication ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Snapshots: Instant data copy (Software based/Hardware based) Data Replication: Sync, Async, Bulk Copy/Adaptive Data Replication Method: Hardware, Software

Some Popular Replication Tools ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Security - Controlling Access to the SAN ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Fabric Security - Zoning ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Zoning - Hard vs. Soft Zoning ,[object Object],[object Object],[object Object],Port Zoning WWPN Zoning ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Advantages Disadvantages

Fabric Security - Vendor Specific Access Control ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Security: Volume Access Control (LUN Masking) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Backup ,[object Object],[object Object],[object Object],[object Object],[object Object]

Individual Backup Centralized Backup on LAN Disk to Disk Backup Tiered Backup

Some Popular Backup Softwares ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Common storage terms ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Storage Primer