Dell CX700 Configuration Guide - Page 90
Implementing SAN Copy Over Extended Distances, Performance Considerations, Network Performance
View all Dell CX700 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 90 highlights
Data Replication and Data Mobility Software Implementing SAN Copy Over Extended Distances SAN Copy supports protocols that let you use the IP WAN to send LUN data over extended distances. In order to do this, you need to extend your switch fabric by using Fibre Channel-to-IP converters that allow Fibre Channel devices to communicate over TCP/IP networks. When using SAN Copy over IP, a read operation will be faster than a write operation. Performance Considerations To get the best performance when implementing SAN Copy over IP, it is important to consider the following performance factors: ◆ Network performance ◆ SAN Copy configuration ◆ Data compression Network Performance The quality of the network is a critical factor in determining SAN Copy performance, especially with respect to latency (delay in the network) and bandwidth (frequency of the transferred bits). SAN Copy Configuration In order to address the network performance issues, SAN Copy lets you configure the buffers the SAN Copy operations use. Data Compressibility Data compression allows more data to be sent a given amount of time, effectively multiplying the effective bandwidth. The amount of data compression depends on many factors, such as data type, compression algorithm of the equipment, and line speed. Figure 4-6 shows a sample SAN Copy over IP configuration. In this example, LUN data is being transferred over the IP storage network using two FC-IP converters. Depending on the direction of the data transfer, the FC-to-IP converter either converts Fibre Channel data to IP data or IP data to Fibre Channel data. 4-28 EMC CLARiiON CX300, CX500, CX500i, and CX700 Storage Systems Configuration Planning Guide