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IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
book

IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning

by Cathy Warrick, Craig Gordon, Benoit Granier, Keitaro Imai, Rosemary McCutchen, Brannen Proctor, Jim Sedgwick, Paulus Usong, Mary Ann Vandermark, John Wickes
December 2005
Intermediate to advanced content levelIntermediate to advanced
530 pages
18h 34m
English
IBM Redbooks
Content preview from IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
Chapter 7. Open systems servers - UNIX 227
7.7 Testing and verifying DS6000 storage
To characterize storage performance from a host perspective, we enter into a
multidimensional discussion involving considerations that include: throughput (IOPS and
MB/s); read or write; random or sequential; block size; and response time. Here are a couple
of rules that will help characterize these terms:
򐂰 Throughput or bandwidth is measured in two separate and opposing metrics: Input/Output
operations per second (IOPS) and data transfer rate (MB/s). Generally, random workloads
are characterized by IOPS and sequential workloads by MB/second.
򐂰 Maximum IOPS ar ...
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ISBN: 0738494119Purchase book