be quickly moved between cluster nodes to allow for planned and unplanned outages. With HSC, the replicated
LUs and the child partition are automatically brought online.
Figure 7 illustrates how multiple child partitions and their associated applications can be made highly available
using HSC.
Figure 7. Hitachi Storage Cluster for Hyper-V Solution
Hyper-V Performance Monitoring
A complete, end-to-end picture of your Hyper-V Server environment and continual monitoring of capacity and
performance are key components of a sound Hyper-V management strategy. The principles of analyzing the
performance of a guest partition installed under Hyper-V are the same as analyzing the performance of an
operating system installed on a physical machine. Monitor servers, operating systems, child partition
application instances, databases, database applications, storage and IP networks and the 2000 family storage
system using tools such as Windows Performance Monitor (PerfMon) and Hitachi Performance Monitor feature.
Note that while PerfMon provides good overall I/O information about the Hyper-V parent and the guests under
the Hyper-V parent, it cannot identify all possible bottlenecks in an environment. For a good overall
understanding of the I/O profile of a Hyper-V parent and its guest partitions, monitor the storage system’s
performance with Hitachi Performance Monitor feature. Combining data from at least two performance-
monitoring tools provides a more complete picture of the Hyper-V environment. Remember that PerfMon is a
per-server monitoring tool and cannot provide a holistic view of the storage system. For a complete view, use
PerfMon to monitor all servers that are sharing a RAID group.
Windows Performance Monitor
PerfMon is a Windows-based application that allows administrators to monitor the performance of a system
using counters or graphs, in logs or as alerts on the local or remote host. The best indicator of disk
performance on a Hyper-V parent operating system is obtained by using the
\Logical Disk(*)\Avg.
sec/Read
and
\Logical Disk(*)\Avg. sec/Write
performance monitor counters. These performance
monitor counters measure the latency time that read and write operations take to respond to the operating
system. In general, average disk latency response times greater than 20ms on a disk are cause for concern.
For more information about monitoring Hyper-V related counters, see Microsoft® TechNet’s
Measuring
Performance on Hyper-V
article.
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