Agents Administration - Tests
 

Configuration of NAUSDDiskTest

This test auto-discovers the disks used by the storage system and reports how well every disk uses the available space and processes I/O requests. This way, potential space contentions and I/O latencies can be isolated, and slow disks and those that are running short of space can be identified. In addition, the test also reports the current state of each disk and how busy each disk is, thus pointing administrators to broken disks and over-used disks. In the process, the test turns the spotlight on irregularities in load-balancing.

The default parameters associated with this test are as follows:

  • The TEST PERIOD list box helps the user to decide how often this test needs to be executed.

  • In the HOST text box, specify the IP address of the storage device for which this test is to be configured.

  • Specify the port at which the specified HOST listens in the PORT text box. By default, this is set to NULL.

  • Specify the name of the user who possess the required privileges to monitor the storage device in the USER text box. If such a user does not pre-exist, then, you can create a special user for this purpose.

  • Specify the password that corresponds to the above-mentioned USER in the PASSWORD text box.

  • Confirm the password by retyping it in the CONFIRM PASSWORD text box.

  • In order to collect metrics from the NetApp Unified Storage system, the eG agent connects to the ONTAP management APIs over HTTP or HTTPS. By default, this connection is authenticated using the LOGIN_PASSWORD authentication mechanism. This is why, LOGIN_PASSWORD is displayed as the default AUTHENTICATION MECHANISM.

  • Set the USE SSL flag to Yes, if SSL (Secured Socket Layer) is to be used to connect to the NetApp Unified Storage System, and No if it is not.

  • By default, in most environments, NetApp Unified Storage system listens on port 80 (if not SSL-enabled) or on port 443 (if SSL-enabled) only. This implies that while monitoring the NetApp Unified Storage system, the eG agent, by default, connects to port 80 or 443, depending upon the SSL-enabled status of the NetApp Unified Storage system - i.e., if the NetApp Unified Storage system is not SSL-enabled (i.e., if the USE SSL flag above is set to No), then the eG agent connects to the NetApp Unified Storage system using port 80 by default, and if the NetApp Unified Storage system is SSL-enabled (i.e., if the USE SSL flag is set to Yes), then the agent-NetApp Unified Storage system communication occurs via port 443 by default. Accordingly, the API PORT parameter is set to default by default.

    In some environments however, the default ports 80 or 443 might not apply. In such a case, against the API PORT parameter, you can specify the exact port at which the NetApp Unified Storage system in your environment listens, so that the eG agent communicates with that port for collecting metrics from the NetApp Unified Storage system.

  • A vFiler is a virtual storage system you create using MultiStore, which enables you to partition the storage and network resources of a single storage system so that it appears as multiple storage systems on the network. If the NetApp Unified Storage system is partitioned to accommodate a set of vfilers, specify the name of the vfiler that you wish to monitor in the VFILERNAME text box. In some environments, the NetApp Unified Storage system may not be partitioned at all. In such a case, the NetApp Unified Storage system is monitored as a single vFiler and hence the default value of none is displayed in this text box.

  • A disk is termed as Busy if there is atleast one outstanding request that is awaiting a response. Alternately, you can set a threshold value in terms of percentage of time to classify the disk as a Busy disk. Specify such a threshold value in the DISK BUSY THRESHOLD text box. By default, this value is set to 70 (percent). This parameter is deprecated from eG v5.6.5.

  • Sometimes, the read operations by users on a disk may take too long to complete. In such a case, specify a threshold value in the READ LATENCY THRESHOLD text box, above which you can classify the disk as a Slow disk(read) i.e., you can term this disk as a slow disk (read) when the read operation by the user violates the threshold value mentioned in this text box. By default, this value is set to 20. This parameter is deprecated from eG v5.6.5.

  • Sometimes, the write operations by users on a disk may take too long to complete. In such a case, specify a threshold value in the WRITE LATENCY THRESHOLD text box, above which you can classify the disk as a Slow disk(write) i.e., you can term this disk as a slow disk (write) when the write operation by the user violates the threshold value mentioned in this text box. By default, this value is set to 20. This parameter is deprecated from eG v5.6.5.

  • Specify the duration (in seconds) beyond which the test will timeout if no response is received from the NetApp Unified Storage system. By default, the timeout period is 120 seconds.

  • The DD FREQUENCY refers to the frequency with which detailed diagnosis measures are to be generated for this test. The default is 2:1. This indicates that, by default, detailed measures will be generated every time this test runs, and also every time the test detects a problem. You can modify this frequency, if you so desire. Also, if you intend to disable the detailed diagnosis capability for this test, you can do so by specifying none against DD FREQUENCY.

  • To make diagnosis more efficient and accurate, the eG system embeds an optional detailed diagnostic capability. With this capability, the eG agents can be configured to run detailed, more elaborate tests as and when specific problems are detected. To enable the detailed diagnosis capability of this test for a particular server, choose the On option against DETAILED DIAGNOSIS. To disable the capability, click on the Off option.

    The option to selectively enable/disable the detailed diagnosis capability will be available only if the following conditions are fulfilled:

    • The eG manager license should allow the detailed diagnosis capability.

    • Both the bad and normal frequencies configured for the detailed diagnosis measures should not be 0.

  • If multiple components of the same component type are awaiting configuration, then an APPLY TO OTHER COMPONENTS check box will appear in this page. Clicking on this check box will allow you to apply the configuration to all/selected components of that type.

  • Once the necessary values have been provided, clicking on the Update button will register the changes made.

When changing the configuration for specific servers, a "*" beside the text box corresponding to the parameter signifies that these values have to be manually configured by the user. The parameter values that require to be configured will typically be prefixed with a "$" or contain a series of "*". A value of "none" in the parameter value indicates that the corresponding parameter value can be changed if required.