Page 960 - Cloud computing: From paradigm to operation

6 Monitoring

7.1.3 Virtual machine operation and control

VM operation and control are referred to the management of physical or virtual computing resources that
allow users to create, edit, start and stop VMs.
The impetus behind cloud computing is the ever-increasing demand to manage growth and increase
computing flexibility by dynamic resource operation and control based on demand. An example of resource
control operation could be to horizontally scale a database server by migrating it from a small CPU resource
configuration to an extra-large CPU resource to improve throughput. This basic requirement of cloud
computing is supported by the resource operation and control system. An inefficient resource operation and
control system has a direct negative effect on performance. It can also indirectly affect system functionality.
Some system functions provided might become ineffective due to poor performance.
See Table 7-3.

Table 7-3 – Parameters collected to monitor VM operation and control

Metric name Description Unit
CPU of VM start Time of CPU start s

CPU of VM stop Time of CPU stop s
CPU of VM restart Time of CPU restart s
CPU of VM select Time of CPU select s
CPU of VM scale down Time of CPU scale down s
CPU of VM scale up Time of CPU scale up s
VM start Time of VM start s
VM acquisition Time of VM acquisition s
VM release Time of VM release s
memory of VM scale down Time of memory scale down s
memory of VM scale up Time of memory scale up s

disk of VM scale down Time of disk scale down s
disk of VM scale up Time of disk scale up s
upload file Time of upload file s
download file Time of download file s
allocation Internet protocol (IP) Time of allocation IP s
allocation ports Time of allocation ports s
allocation URL Time of allocation uniform resource locator (URL) s
Time that is needed to move a VM from two
VM live migration s
predefined resources
Maximum time in which a customer has no
migration Interruption Time s
access to migration to the resource
VM cloning Time of VM cloning s

VM backup Time of VM backup s
VM imaging Time of VM imaging s
Time from the failure of a storage, to the
recovery time s
successful restore from an existing backup
NOTE – VM backup time interval varies according to backup type, e.g., full backup or incremental backup.

952