HP StorageWorks B-Series Remote Replication Solution Best Practices Guide (5697-6731, June 2007)

Figure 12 HP StorageWorks Con tin uo us Acces s EVA Replication Performan c e
Estimator-V3
Solution testing with EVA workloads
During acceptance testing and post installation, it is very important to monitor the network under a variety
of representative Continuous Access EVA workloads before placing the system in production. Some or all
of these tests should be run c oncurrently. Suggested workloads include the following:
• Full DR G
roup copies (normalization of volumes). At least four operating concurrently is
recommended
• Local I/O between host initiators and EVA Storage Arrays
• Replic
ation
• Tape Backup
Va rious tools which can used to gather information are:
• Host To
ols: PERFMON, IOSTAT or a similar performance tool
• EVA Tools: Continuous Access EVA Performance Estimator, EVA-PERF
HP StorageWorks B-Series tools
A basic Ethernet MTU is 1518 bytes. This forces an FC frame to be broken into two Ethernet pac kets
when traveling via FCIP. A 2250 byte jumbo p acket can accept an entire standard FC frame (2148 bytes)
leading to improved FC IP performance and more efficient network utilization. Many IP service providers
can support jumbo packets throughout their network.
It is critical that the user u nderstands the operational characteristics of the IP link intended to be used
for the FCIP communications. WAN analysis tools a re d esigned to estimate the end-to-end IP path
performance characteristics between a pair of FCIP port endpoints. WAN tools include the following
commands and options:
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Tools for managing and monitoring th e replication network