This section explains the functions that can be selected from [Thresholds Monitoring], one of the function items on the menu bar in the Performance Management window. However, to enable the functions, a target device must be selected in the tree. Moreover, an instruction for performance monitoring of the device must already have been issued.
Monitoring Enable/Disable
Select this to specify whether to enable or disable the threshold monitoring function for the target device. Selecting this item reverses the current state of threshold monitoring. A dialog indicating the reversal of this state appears. In the dialogs shown below as an example, the left one indicates that disabled monitoring is enabled, and the right one indicates that enabled monitoring is disabled.
Monitoring Time Setting
Selecting this function displays the dialog box shown in the figure below. In this dialog box, the user can specify the threshold monitoring time zone and the alarm event log display time zone for the target device.
Threshold Monitoring Time | The start time and stop time can be specified. The duration must be within 24 hours. | |
Alarm Display Time | The start time and stop time for event log display can further be specified within the threshold monitoring time. The duration must be within 24 hours. | |
Alarm Display Frequency | "Alarm Display Frequency" is used to define the method of displaying an event log generated when the threshold conditions are met. | |
All | Specifies that an event log be reported each time an alarm log is generated. | |
Day by day | Specifies that an event log be reported only once a day even though many alarm logs are generated in the day. | |
Every monitoring time | Specifies that an event log be reported per threshold monitoring unit time specified in "Threshold Setting/Start Monitoring/Stop Monitoring" in the figure shown below. | |
Nothing | Specifies that no event log be reported even though an alarm log is generated. "Threshold Monitoring Alarm Log" can be used to refer to every alarm log. | |
Note
By default an entire day from 00:00 to 24:00 is set for both the monitoring time and event log display time, and an alarm log is reported to the event log every time it is generated.
If "Day by day," "Every monitoring time," or "Nothing" is specified for "Alarm Display Frequency," event log display for each device is suppressed.
Thresholds Setting/Start Monitoring/Stop Monitoring
Selecting this displays the dialog shown below. This dialog is used to set the threshold conditions of threshold monitoring for the target device. In the figure below where the <Start> button is clicked, the Logical Volume response time, RAID Group busy rate, and CM busy rate are specified.
<Add> button | The threshold condition of the threshold monitoring that is selected, and set is displayed and registered in the list. When there is already "Threshold Monitoring Device", it is considered the change instruction, and updates it. |
<Delete> button | All the threshold conditions displayed in the list of the threshold monitoring being set are deleted. However, the content which directed the monitoring starting before is not deleted. |
<Start> button | The threshold monitoring is started under the threshold condition displayed in the list of the threshold monitoring being set. Moreover, the set threshold condition is kept in this software. |
<Stop> button | The threshold monitoring is stopped. The threshold condition correction of the threshold monitoring becomes possible. |
<Cancel> or <Close> button | The dialog of "Thresholds Setting/Start Monitoring/Stop Monitoring" closes. However, the content of the input is annulled while inputting the threshold condition of the threshold monitoring. |
In this dialog, it has the following function button.
Device | Displays the nickname, IP address, and type of the target device. | |
Current Status | Displays the monitoring status and the monitoring time zone specified in "Monitoring Time Setting". Monitoring in Progress indicates that the <Start Monitoring> button has been clicked and monitoring is in progress. Monitoring Stop indicates that monitoring is stopped. Monitoring on Standby indicates that monitoring is ready to start but is temporarily stopped because the current time is outside the monitoring time zone. | |
Target | LogicalVolume Response Time | Select this item to monitor the average processing time of Read/Write I/O. |
RAIDGroup Busy Rate | Select this item to monitor the average busy rate of the drives (disks) making up a RAIDGroup. For a "RAID1+0 (4 + 4) configuration, for example, it monitors the average of eight drives. | |
CM busy rate | Select this item to monitor the CM utilization in the device. | |
Target LogicalVolume Bounds | Displays the range of target LogicalVolumes specified for performance management. The target LogicalVolumes are subjected to threshold monitoring. No target range needs to be specified for RAIDGroup and CM because the maximum numbers of these units configured for a device are automatically defined as target ranges. | |
Threshold | Specify the threshold for the item selected for "Target". This is output as an alarm if the performance value is equal to or exceeds the threshold during threshold monitoring. Each default value can be selected from a list for the item selected in "Target". A value other than the default values can also be specified. | |
Rearm | The setting of the Lower Limit is enabled when a value is set in "Total time" in "Alarm Tolerance Level" and the check box is selected. A value can be selected from the list or entered directly. If the lower limit is set and the performance value is equal to or less than this value, "Total time" will be reset and threshold monitoring will start again. | |
Alarm Tolerance Level | Total time | Specifies that an alarm log be generated when the total time of events that exceeded the threshold within the threshold monitoring unit time has reached the specified total time. |
Continuous time | Specifies that an alarm log be generated when an event that exceeds the threshold continuously for the specified time within the threshold monitoring interval is detected. | |
Threshold Monitoring Interval | Specify the unit time during which alarm monitoring is to be performed starting from when the threshold is exceeded. | |
The relationships between parameters are shown in the figure below.
The figure shown below assumes the following conditions ("Total time" is selected for "Alarm Tolerance Level").
Threshold Monitoring Time | 0:00-23:00 | ||
Alarm Display Time | 0:00-14:00 | Alarm Display Frequency | All |
Target | RAIDGroup Busy Rate | Threshold | 80% |
Lower Limit | 10% | ||
Alarm Tolerance Level | Total time: 360 seconds | ||
Threshold Monitoring Interval | 60 minutes | ||
In A, the accumulated time during which the performance value equals or exceeds the threshold value has reached 300 seconds in "Threshold Monitoring Time", but the lower limit is met or exceeded before "Threshold Monitoring Interval 60 minutes" is reached, therefore data will be reset and monitoring will restart.
In B, the accumulated time during which the performance value equals or exceeds the threshold value has reached 360 seconds in "Threshold Monitoring Time", therefore an alarm log is generated. No alarm is reported for event log display because the events occurred outside the time range specified for "Alarm Display Time".
The figure shown below assumes the following conditions ("Continuous time" is selected for "Alarm Tolerance Level").
Threshold Monitoring Time | 0:00-23:00 | ||
Alarm Display Time | 0:00-23:00 | Alarm Display Frequency | All |
Target | RAIDGroup Busy Rate | Threshold | 80% |
Alarm Tolerance Level | Continuous time: 360 seconds | ||
Threshold Monitoring Interval | 60 minutes | ||
In either A or B, the threshold is exceeded for consecutively 360 seconds within the "Threshold Monitoring Time" and therefore an alarm log is generated in either case. However, because "Every monitoring time" is selected for "Alarm Display Frequency," only alarm A is reported for event log display.
Moreover, the following figure is an example to specify the Port throughput of Fibre Channel switch and click the <Start> button.
Device | Displays the nickname, IP address, and type of the target device. | |
Current Status | Displays the monitoring status and the monitoring time zone specified in "Monitoring Time Setting". Monitoring in Progress indicates that the <Start> button has been clicked and monitoring is in progress. Monitoring Stop indicates that monitoring is stopped. Monitoring on Standby indicates that monitoring is ready to start but is temporarily stopped because the current time is outside the monitoring time zone. | |
Target | Port Throughput | Select this item to monitor the total throughput of reception and transmission in each port. |
Target Port Bounds | All ports implemented by the target switch specified for performance management are subject to threshold monitoring. | |
Threshold | Specify the threshold for the item selected for "Target". This is output as an alarm if the performance value is equal to or exceeds the threshold value during threshold monitoring. Each default value can be selected from a list for the item selected in "Target". A value other than the default values can also be specified. | |
Rearm | The setting of the lower limit is enabled when a value is set in "Total time" in "Alarm Tolerance Level" and the check box is selected. A value can be selected from the list or entered directly. If the lower limit value is specified, and the performance value becomes equal to or les than this value, threshold monitoring will restart, and "Total Time" will be reset for counting to begin again. The "Total Time" field is reset and recounting will take place every time this occurs. | |
Alarm Tolerance Level | Total time | Specifies that an alarm log be generated when the total time of events that exceeded the threshold within the threshold monitoring interval has reached the specified total time. |
Continuous time | Specifies that an alarm log be generated when an event that exceeds the threshold continuously for the specified time within the threshold monitoring interval is detected. | |
Threshold Monitoring Interval | Specify the unit time during which alarm monitoring is to be performed starting from when the threshold is exceeded. | |
For "Threshold" and "Rearm", check the type of the target switch (1 Gbps, 2 Gbps or 4 Gbps). When the switch type is 1 Gbps, specify the utilization (%) against the reference value of 100 MBps. When the switch type is 2 Gbps, specify the utilization (%) against the reference value of 200 MBps. When the switch type is 4 Gbps, specify the utilization (%) against the reference value of 400 MBps. For instance, when 90% is specified for the threshold of a 2 Gbps type switch, the threshold is 180 MBps (total of reception and transmission).
Thresholds Alarm log
When selecting this function, the following dialog is displayed. The threshold monitoring alarm log list detected with all the object devices is displayed. The content of the display are "Report ID", "Day", "Time", "Level", "Validation", "Device" and "Title". When the alarm log list has already been displayed, a new alarm log list is not displayed. The contents of the alarm log list which has already displayed is updated to latest information.
"Report ID" indicates the management number allocated in order of detection of alarm log. The maximum is 1000.
"Day" and "Time" indicate the date when an alarm log was created.
"Level" indicates the level of an alarm log. Only Alarm is currently used.
"Validation" indicates the confirmation check box in alarm log details, and indicates that save processing has completed.
"Device" indicates the nickname assigned to the target device when it was registered.
"Title" indicates the title of the event for which an alarm log was created.
This dialog has a menu bar. [Tool] on the menu bar can be used to select the following functions for the alarm log list: [Find], [Sort], [Delete], and [Update to the newest information]. Multiple items can be specified for [Delete]. Similar to other Windows operations, multiple items can be selected with the use of the Ctrl and Shift keys.
From [File] on the menu bar, [Print] and [Selected Rows Print] can be selected as functions for the threshold monitoring alarm log list. [Print] prints the entire threshold monitoring alarm log list that is displayed. When lines on the displayed threshold monitoring alarm log list is selected, [Selected Rows Print] can be used to print only these lines. Similar to other Windows operations, multiple items can be selected with the use of the Ctrl and Shift keys. In print data, the creation date is the date on which the threshold monitoring alarm log list is displayed. However, the date when the threshold monitoring alarm log was displayed again after the threshold monitoring alarm log is deleted is printed as the creation date when [Delete] function is selected.
In the dialog, double-clicking on an alarm log line displays detailed information of the specified report ID, as shown in the next figure. This example shows a report about a RAID Group load error.
The report has the following items specified for threshold settings: threshold, threshold monitoring interval, alarm tolerance time, rearm, and others. Also, it shows the alarm log creation date and relevant device information.
The confirmation check box can be checked, and a simple memo can be input. Use the memo as comments to explain the confirmation mark used to recognize alarm contents and to provide contact information.
If a check or comments are input, select [File] - [Save] to save the input data.
However, up to 400 characters can be saved in Note.
The displayed report can be printed by clicking [File] - [Print] from the menu bar.
Up to 10 lines of a comment entered on the report can be printed. If the confirmation check box has been checked, OK is printed.
Alarm Delete Setting
Selecting this function open the dialog shown below. This dialog is used to specify the management retention period for alarm log data created with the threshold monitoring function as Alarm Maintenance Term. Alarm log data whose retention period has expired is automatically deleted according to settings in the dialog. The deletion function is enabled when the start of management or the expiration of this period is detected. Consequently, the data whose retention period has expired is deleted.
If 0 day is specified, the automatic deletion function does not work.
If the number of alarm logs has reached 1000, the maximum number, within the specified period, the oldest alarm log data is replaced with the newest alarm log data. The maximum number is fixed at 1000.
