Page 964 - Cloud computing: From paradigm to operation

6 Monitoring

See Table 7-8.

Table 7-8 – Parameters collected for the monitoring environment

Metric name Description Unit

temperature Current temperature of server room o C
voltage Current voltage of electricity supply V
electric current Electric current of electricity supply A
Output voltage of an uninterruptible power
UPS voltage V
system (UPS) battery
UPS output electric current Output electric current of UPS battery A
UPS charging electric current Electric current of charging A
humidity Relative humidity of server room %
fan rotations Fan rotations per minute rotations/min
power of fan Current power of fan consumption W

7.2 Service layer parameters

7.2.1 General

One of the most important areas for provider and consumer is service performance and availability when it
comes to cloud computing. Cloud service provider and consumer need to get an entire view of the health of
service. A lot of decision making and SLA determination are driven by service performance and availability.
The monitoring system should report the service performance and availability parameters to identify
whether the QoS specified in the SLA is fulfilled.

Different cloud services can be offered with different terminologies, specifications and features. Cloud
services can achieve different levels of performance under various workloads generated by diverse
applications. For example, unlike computation and communication-intensive applications, performance of
data-intensive applications typically will be strongly affected by I/O performance and storage access in a
cloud infrastructure. The monitoring parameters of typical services are included in this clause. Others are for
further study.
See Table 7-9.

Table 7-9 – Performance metrics for monitoring general cloud services

Category Metric name Description

MTBF Mean time between failures
Availability
MTTR Mean time to repair
Response time Response time for composite or atomic service
Performance Number of transactions or requests processed per
Throughput
specified unit of time
Bandwidth Bandwidth of the connection that supports a service
Capacity Capacity of a temporary or persistent storage medium,
Storage capacity
such as RAM, disk or tape

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