Oracle Solaris 11 comes with a new set of commands that provide the ability to conduct
performance analysis in a virtualized multitenant cloud environment. Performance analysis in a
virtualized multitenant cloud environment with different users running various workloads can be a
challenging task for the following reasons:
Each virtualization software adds an abstraction layer to enable better manageability. Although this makes it much simpler to manage the virtualized resources, it is very difficult to find the physical system resources that are overloaded.
Each Oracle Solaris Zone can have different workload; it can be disk I/O, network I/O, CPU, memory, or combination of these.
In addition, a single Oracle Solaris Zone can overload the entire system resources.It is very difficult to observe the environment; you need to be able to monitor the environment from the top level to see all the virtual instances (non-global zones) in real time with the ability to drill down to specific resources.
The benefits of using Oracle Solaris 11 for virtualized performance analysis are:
• Observability. The Oracle Solaris global zone is a fully functioning operating systems, not a propriety hypervisor or a minimized operating system that lacks the ability to observe the entire environment—including the host and the VMs, at the same time. The global zone can see all the non-global zones’ performance metrics.
• Integration. All the subsystems are built inside the same operating system. For example, the ZFS file system and the Oracle Solaris Zones virtualization technology are integrated together. This is preferable to mixing many vendors’ technology, which causes a lack of integration between the different operating system (OS) subsystems and makes it very difficult to analyze all the different OS subsystems at the same time.
• Virtualization awareness. The built-in Oracle Solaris commands are virtualization-aware,and they can provide performance statistics for the entire system (the Oracle Solaris global zone). In addition to providing the ability to
drill down into every resource (Oracle Solaris non-global zones), these commands provide accurate results during the performance analysis process.
In this article, we are going to explore four examples that show how we can monitor virtualized environment with Oracle Solaris Zones using the built-in Oracle Solaris 11 tools. These tools provide the ability to drill down to specific resources, for example, CPU, memory, disk, and network. In addition, they provide the ability to print statistics per Oracle Solaris Zone and provide information on the running applications.