Wednesday Mar 10, 2010

Monitoring the Sun Storage 7000 Appliance from Oracle Grid Control

Over the past few months I've blogged on various monitoring and alerting topics for Sun Storage 7000 Appliances. Besides my favorite of the blogs (Tweeting your Sun Storage 7000 Appliance Alerts), the culmination of this monitoring work is now available as the Sun Storage 7000 Management Plug-in for Oracle Enterprise Manager 10g Grid Controller 1.0, for use with the just shipped 2010.Q1 software release for the Sun Storage 7000 Appliance Family. Phew, that's a bit of a mouthful for a title but I'll just refer to it as the SS7000MPfOEMGC, does that help? Well, maybe not ;-)

Sun Storage 7000 Management Plug-in for Oracle Enterprise Manager 10g Grid Controller creates a coupling between the enterprise-wide monitoring provided by Oracle Grid Control and the monitoring and analytics provided by Sun Storage 7000 Appliances. If you are not familiar with Oracle Grid Control, there is a nice write-up within the Installation and Configuration Guide for Oracle Grid Control. In a nutshell, Oracle Grid Control aids in monitoring your vertical data center rather than simply being an aggregation of horizontal health information. The documentation describes it as software and the infrastructure it runs on but I would simply call it a "Vertical Data Center Monitoring Environment".

The goal of the plug-in to Oracle Grid Control is to facilitate a Database Administrator in their use of Sun Storage 7000 Appliances without attempting to reproduce the world-class analytics available within Sun Storage 7000 Appliances. In other words, the goal is to create a bridge between the world of Database Administration and the world of Storage Administration with just enough information so the two worlds can have dialog about the environment. Specifically, the Plug-in for Sun Storage 7000 Appliances is targeted at the following tasks:


  • Connecting Database deployments with Sun Storage 7000 resources that provide storage infrastructure to the database
  • Understanding the performance metrics of a Database from the perspective of the Appliance (what cache resources are being used for a database, what network resources and the performance being delivered, and how various storage abstractions are being used by the database)
  • Providing a Federated view of Sun Storage 7000 Appliances deployed in the environment (including storage profiles and capacities, network information and general accounting information about the appliances)
  • Providing detailed performance metrics for use in initial service delivery diagnostics (these metrics are used to have more detailed conversations with the Storage Administrator when additional diagnostics are required)

Let's take a look at one of the more interesting scenarios as a simple way of showing the plug-in at work rather than reproducing the entire Installation Guide in blog-form.

Download the Plug-in for Sun Storage 7000 Appliances, Unzip the downloaded file, and read the Installation Guide included with the plug-in.

Follow the instructions for installing, deploying the plug-in to agents and adding instances of Sun Storage 7000 Appliances to the environment for monitoring. Each instance added takes about 60 minutes to fully populate with information (this is simply the nature of this being a polling environment and the plug-in is set-up to monitor data sets that don't change often less frequently ... 60 minutes ... than data sets that do change frequently ... 10 minute intervals).

Once data is funneling in, all of the standard appliance-centric views of the information are available (including the individual metrics that the plug-in collects) as well as a view of some of the important high-level information presented on the home page for an instance (provided you are using Oracle Grid Control 10.2.0.5). Here is a view of a single appliance instance's home page:

Looking into the Metrics collected for an appliance brings you to a standard displays of single metrics (as shown below) or tables of related metrics (all standard navigation in Oracle Grid Controller for plug-in components).

Included in the plug-in for Sun Storage 7000 Appliances are 5 reports. Of these reports, 3 run against a single instance of a Sun Storage 7000 Appliance and are available from both the context of the single instance and the Oracle Grid Control Reports Tab while 2 run against all monitored instances of Sun Storage 7000 Appliances and are only available from the Reports Tab. Among the 5 Reports are 2 that combine information about Databases deployed against NFS mount points and Sun Storage 7000 Appliances that export those NFS mount points. The two reports are:


  • Database to Appliance Mapping Report - Viewable from a single target instance or the Reports Tab, this report shows databases deployed against NFS shares from a single Sun Storage 7000 Target Instance
  • Federated Database to Appliance Mapping Report - Viewable only from the Reports Tab, this report shows databases deployed against NFS shares from all monitored Sun Storage 7000 Appliances

Looking at the "Master" (top-level) Database to Appliance Mapping Report (shown below) you will see a "Filter" (allowing you to scope the information in the table to a single Database SID) and a table that correlates the filtered Database SID to Network File Systems shared by specific appliances along with the Storage IP Address that the share is accessed through, the appliance's Storage Network Interface and the name that the appliance is referred to as throughout this Grid Control instance.

From the Master report, 4 additional links are provided to more detailed information that is filtered to the appliance abstraction that is used by the Database SID. The links in the columns navigate in the following way:


  • Database Link - This link takes the viewer to a drill-down table that shows all of the files deployed on the shares identified in the first table. With this detail report, and administrator could see exactly what files are deployed where. The table also contains the three links identified next.
  • Network File System - Takes the viewer down to a detailed report showing metadata about the share created on the appliance, how the cache is used (ARC and L2ARC) for this share and general capacity information for the share.
  • Storage IP Address - Takes the viewer to the Metric Details that relate to the appliance configuration (serial number, model, etc...).
  • Storage Network Interface - Takes the viewer to metadata about the network interface as well as reports on the Network Interface KB/sec and NFS Operations Per Second (combined with the NFS Operations Per Second that are allocated to serving the share that the database resides on)

The detail reports for the Network File System and Storage Network Interface (both of which are not directly accessible from the Reports Tab) use a combination of current metrics and graphical time-axis data, as shown in the following report:

Wherever applicable, the Detail Reports drill further into Metric Details (that could also be accessed through an appliance instance target home page).

It is important to note that several of these reports combine a substantial amount of data into a single page. This approach can create rather lengthy report generation times (in worst case scenarios up to 5 minutes). It is always possible to view individual metrics through the monitoring home page. As metric navigation is much more focused and relates to a single metric, metric navigation always performs faster and is preferred unless the viewer is looking for a more complex assembly of information. With the reports, an administrator can view network performance and storage performance side by side which may be more helpful in diagnosing service delivery issues than navigating through single metric data points.

In addition to a substantial number of collected metrics there are several alerts that are generated on various appliance thresholds that can occur throughout the operation of target appliances.

Conclusion


Oracle Grid Control gives a fully integrated view of the "Vertical" data center, combining software infrastructure with hardware infrastructure (including storage appliances). Sun Storage 7000 Management Plug-in for Oracle Enterprise Manager 10g Grid Controller 1.0 presents Sun Storage 7000 Appliances within the vertical context and presents metrics and reports tailored specifically towards Sun Storage 7000 Appliances as viewed by a Database Administrator. For more information on the plug-in and software discussed in this entry:

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