Historical summary

View performance data for a specific TS7700 cluster.

The Historical Summary chart displays performance statistics such as system usage, host throughput, mount activity, and copy rates. Statistics are shown for the selected cluster during the period you specify.

Chart elements

You can change many of the Historical Summary chart elements by clicking them.

Table 1. Elements of the Historical Summary chart
Element	Description
Y axes	The left vertical axis measures either throughput (MiBs/s) or copies (MiB), depending on the selected data sets. The right vertical axis measures the number of mounted virtual drives, reclaimed physical volumes, and data set size to copy; possible measurements include MiB, GiBs, milliseconds, seconds, hours, and percentage.
X axis	The horizontal axis measures in hours the time period for the data sets shown. Measurements are shown in 15-minute increments by default. Click the time span to change the display increments. Possible values include 1 day 12 hours 1 hour 30 minutes 15 minutes custom
Last 24 hours	Click the icon in the top right corner of the page to reset the time span that is shown on the chart to the past 24-hour period. A change to the time span does not alter the configuration of data sets displayed in the main area of the chart.
Data sets	Data sets displayed in the main area of the chart are shown as lines or stacked columns. Data sets related to throughput and copy queues can be grouped to better show relationships between these sets. Refer to Table 2 for descriptions of all data sets.
Legend	The area below the X axis lists all data sets selected to display on the chart, along with their identifying colors or patterns. The legend displays a maximum of 10 data sets. Click any data set shown in this area to toggle its appearance on the chart. Note: To remove a data set from the legend, you must clear it using the Select metrics option.
Time span	The time period from which displayed data is drawn. This range is shown at the top of the page. Note: Dates and times that are displayed reflect the time zone in which your browser is located. If your local time is not available, these values are shown in Coordinated Universal Time (UTC). Click the displayed time span to modify its start or end values. Time can be selected in 15-minute increments. Start date and time The default start value is 24 hours before the present date and time. You can select any start date and time within the 90 days that precede the present date and time. End date and time The default end value is 24 hours after the start date or the last valid date and time within a 24-hour period. The end date and time cannot be later than the current date and time. You can select any end date and time that is between 15 minutes and 24 hours later than the start value.
Presets	Click one of the Preset buttons at the top of the vertical toolbar to populate the chart using one of three common configurations: Throughput Data sets in this configuration include Remote Read Remote Write Recall from Tape Write to Tape Link Copy Out Link Copy In Primary Cache Device Read Deduplication Cache Device Read Primary Cache Device Write Deduplication Cache Device Write Throttling Data sets in this configuration include Average Host Write Throttle Average Copy Throttle Average Deferred Copy Throttle Copy queue Data sets in this configuration include Copy Queue Size The established time span is not changed when a preset configuration is applied. Note: Preset options available depend upon the configuration of the accessing cluster. Refer to Table 2 for existing restrictions.
Select metrics	Click the Select metrics button on the vertical toolbar to add or remove data sets displayed on the Historical Summary chart. Refer to Table 2 for descriptions of all data sets.
Download spreadsheet	Click the Download spreadsheet button on the vertical toolbar to download a comma-separated (.csv) file to your web browser for the period shown on the graph. In the .csv file, time is shown in 15-minute intervals. Note: The time reported in the CSV file is shown in Coordinated Universal Time (UTC). You might find time differences if the system you are using to access the Management Interface is configured for a different time zone.
Chart settings	Click the Chart settings button on the vertical toolbar to enable the low graphics mode for improved performance when many data points are displayed. Low graphics mode disables hover-over tooltips and improves chart performance in older browsers. If cookies are enabled on your browser, this setting is retained when you exit the browser. Note: Low graphics mode is enabled by default when the browser is Internet Explorer, version 8 or earlier.

Data sets

Use the Select metrics button to open the Select metrics window to add or remove data sets displayed on the Historical Summary chart. The Select metrics window organizes data sets by sections and categories. You can select up to 10 data sets for display on the Historical Summary chart.

If cookies are enabled on your browser, your last selection is retained when you exit the browser.

Table 2. Data set descriptions
Metrics section	Metrics category	Data set	Description
Throughput	I/O	Channel Read/Write MiB/s	Transfer rate (MiB/s) of host data on the FICON channel including Host raw read Rate that is read between the HBA and host. Host raw write Rate that is written to the virtual drive from the host.
Throughput	I/O	Primary Cache Device Read	Data transfer rate (MiB/s) read between the virtual drive and HBA for the primary cache repository. This data set is not displayed if the grid contains a TS7700D .
Throughput	I/O	Primary Cache Device Write	Data transfer rate (MiB/s) written to the primary cache repository from the host through the HBA. This data set is not displayed if the grid contains a TS7700D.
Throughput	I/O	Remote Read	Data transfer rate (MiB/s) to the cache of the accessing cluster from the cache of a remote cluster as part of a remote write operation. This data set is only visible when the accessing cluster is part of a grid.
Throughput	I/O	Remote Write	Data transfer rate (MiB/s) to the cache of a remote cluster from the cache of the accessing cluster as part of a remote read operation. This data set is only visible when the accessing cluster is part of a grid.
Throughput	I/O	Deduplication Cache Channel Read	Data transfer rate (MiB/s) through the deduplication channel between the primary server and the deduplication server as part of a read operation. Note: Deduplication channel and device read values are identical. This data set is only visible if the accessing cluster is a TS7700D .
Throughput	I/O	Deduplication Cache Device Read	same as above (modify span when reinstated)
Throughput	I/O	Deduplication Cache Channel Write	Data transfer rate (MiB/s) through the host channel to the deduplication cache as part of a write operation. This data set is only visible if the accessing cluster is a TS7700D.
Throughput	I/O	Deduplication Cache Device Write	Data transfer rate (MiB/s) through the deduplication server to cache as part of a write operation. This data set is only visible if the accessing cluster is a TS7700D.
Throughput	I/O	Deduplication Write Ratio	The ratio of nominal to physical write throughput. This data set gives the amount of throughput improvement when deduplication is used. Note: This ratio is a floating pointer value, for example: 123 is 12.3:1 and 80 is 8:1. Ratios can exceed 200:1. This data set is only visible if the accessing cluster is a TS7700D.
Throughput	Copies	Link Copy Out	Data transfer rate (MiB/s) for operations that copy data from the accessing cluster to one or more remote clusters. This is data transferred between legacy TS7700 Grid links. This data set is only visible if the access cluster is part of a grid.
Throughput	Copies	Link Copy In	Data transfer rate (MiB/s) for operations that copy data from one or more remote clusters to the accessing cluster. This is data transferred between legacy TS7700 Grid links. This data set is only visible if the accessing cluster is part of a grid.
Throughput	Copies	Copy Queue Size	The maximum size of the incoming copy queue for the accessing cluster, which is shown in MiBs, GiBs, or TiBs. Incoming copy queue options include Immediate Synchronous-deferred Immediate-deferred Deferred Family deferred Copy refresh Time delayed Total This data set is only visible if the accessing cluster is part of a grid.
Throughput	Copies	Average Copy Life Span	The average age of virtual volumes to be copied to the distributed library for the accessing cluster. Possible options include Immediate Mode Copy Time Delayed Copy All other deferred type copies
Storage	Cache	Cache to Copy	The number of GiBs that reside in the incoming copy queue of a remote cluster, but are destined for the accessing cluster. This value is the amount of data that is being held in cache until a copy can be made. This data set is only visible if the accessing cluster is part of a grid.
Storage	Cache	Cache Hit	The number of completed mount requests where data is resident in the TVC. If two distributed library access points are used to satisfy a mount with synchronous mode copy enabled, this count is advanced only when the data is resident in the TVC for both access points. For this reason, this data set is visible only if the accessing cluster is a TS7700 Tape Attach, or is part of a grid that contains a TS7700 Tape Attach.
Storage	Cache	Cache Miss	The number of completed mount requests where data is recalled from a physical stacked volume. If two distributed library access points are used to satisfy a mount with synchronous mode copy enabled, this count is advanced when the data is not resident in the TVC for at least one of the two access points. For this reason, this data set is visible only if the accessing cluster is a TS7700 Tape Attach, or is part of a grid that contains a TS7700 Tape Attach.
Storage	Cache	Cache Hit Mount Time	The average time (ms) to complete Cache Hit mounts. This data set is visible only if the accessing cluster is attached to a tape library. If the cache is partitioned, this value is displayed according to partition.
Storage	Cache	Cache Miss Mount Time	The average time (ms) to complete Cache Miss mounts. This data set is visible only if the accessing cluster is attached to a tape library. If the cache is partitioned, this value is displayed according to partition.
Storage	Cache	Deduplication Capacity Ratio	The ratio of nominal to physical cache capacity. This data set gives the amount of cache capacity improvement when deduplication is used. Individual volume ratios are not available. Note: This ratio is a floating pointer value, for example: 123 is 12.3:1 and 80 is 8:1. Ratios can exceed 200:1. This data set is only visible if the accessing cluster is a TS7700D .
Storage	Cache	Deduplication Cache Nominal Used	The amount of cache space that would otherwise be used if deduplication were not employed. This value is used to determine the Deduplication Capacity Ratio and does not include metadata. This data set is only visible if the accessing cluster is a TS7700D.
Storage	Cache	Deduplication Cache Physical Used	The amount of cache that is physically used for deduplication. This value does not include metadata. This data set is only visible if the accessing cluster is a TS7700D.
Storage	Cache	Primary Cache Total Physical Used	The total amount of used cache in a primary cache. If the cache is partitioned, this value is the total physical used in all partitions. This data set is not visible on a TS7700D.
Storage	Cache	Partitions	If the accessing cluster is a TS7760 or TS7770 attached to a tape library, a numbered tab exists for each active partition. Each tab displays check boxes for: Cache Hit Cache Miss, Mount Time Hit Mount Time Miss Data in Cache
Storage	Cache	Primary Used	The amount of used cache in a partitioned, primary cache, according to partition. This data set is only visible if the selected cluster is a TS7760 attached to a tape library.
Storage	Cache	Data Waiting for Premigration	The amount of data in cache assigned to volumes waiting for premigration. This data set is only visible if the selected cluster is a TS7760 attached to a tape library.
Storage	Cache	Data Migrated	The amount of data in cache that has been migrated. This data set is only visible if the selected cluster is a TS7760 attached to a tape library.
Storage	Cache	Data Waiting for Delayed Premigration	The amount of data in cache assigned to volumes waiting for delayed premigration. This data set is only visible if the selected cluster is a TS7760 attached to a tape library.
Storage	Virtual Tape	Maximum Virtual Drives Mounted	The greatest number of mounted virtual drives. This value is a mount count.
Storage	Physical Tape	Write to Tape	Data transfer rate (MiB/s) written to physical media from cache. This value typically represents premigration to tape. This data set is not visible when the selected cluster is not attached to a library.
Storage	Physical Tape	Recall from Tape	Data transfer rate (MiB/s) read from physical media to cache. This value is recalled data. This data set is not visible when the selected cluster is not attached to a library.
Storage	Physical Tape	Reclaim Mounts	Number of physical mounts that are completed by the library for the physical volume reclaim cache operation. This value is a mount count. This data set is not visible when the selected cluster is not attached to a library.
Storage	Physical Tape	Recall Mounts	Number of physical mounts that are completed by the library for the physical volume reclaim operation. This data set is not visible when the selected cluster is not attached to a library.
Storage	Physical Tape	Premigration Mounts	Number of physical mount requests completed by the library required to satisfy pre-migrate mounts. This data set is not visible when the selected cluster is not attached to a library.
Storage	Physical Tape	Physical Drives Mounted	The maximum, minimum, or average number of physical devices of all device types concurrently mounted. The average number displays only when you hover over a data point. This data set is only visible when the selected cluster attaches to a library.
Storage	Physical Tape	Physical Mount Times	The maximum, minimum, or average number of seconds required to complete the execution of a mount request for a physical device. The average number displays only when you hover over a data point. This data set is only visible when the selected cluster attaches to a library.
System	Throttling	Average Host Write Throttle	The average time delay for the write overrun throttle, which is measured in milliseconds. This data set contains the averages of nonzero throttling values where write overrun is the predominant reason for throttling.
System	Throttling	Average Copy Throttle	The average time delay as a result of copy throttling, which is measured in milliseconds. This data set contains the averages of nonzero throttling values where copying is the predominant reason for throttling. It is only visible if the selected cluster is part of a grid.
System	Throttling	Average Deferred Copy Throttle	The average time delay as a result of deferred copy throttling, which is measured in milliseconds. This data set contains the averages of 30-second intervals of the deferred copy throttle value. It is only visible if the selected cluster is part of a grid.
System	Throttling	Average Host Write Throttle for Tape Attached Partitions	The average write overrun throttle delay for the tape attached partitions. This data set is the average of the non-zero throttling values where write overrun was the predominant reason for throttling. It is only visible if the selected cluster is a TS7760 attached to a tape library.
System	Throttling	Average Copy Throttle for Tape Attached Partitions	The average copy throttle delay for the tape attached partitions. The value presented is the average of the non-zero throttling values where copy was the predominant reason for throttling. It is only visible if the selected cluster is a TS7760 attached to a tape library.
System	Throttling	Average Deferred Copy Throttle for Tape Attached Partitions	The average deferred copy throttle delay for the tape attached partitions. This value is the average of 30-second intervals of the deferred copy throttle value during the historical record. It is only visible if the selected cluster is part of a grid and is a TS7760 attached to a tape library.
System	Utilization	Maximum CPU Primary Server	The maximum percentage of processor use for the primary TS7700 server. This data set is not available for a TS7700D .
System	Utilization	Maximum CPU Deduplication Server	The maximum percentage of processor use for the deduplication server. This data set is only available for a TS7700D .
System	Utilization	Maximum Disk I/O Usage Primary Server	The maximum percentage of disk cache I/O uses as reported by the primary server in a TS7700D. This data set is not available for a TS7700D.
System	Utilization	Maximum Disk I/O Usage Deduplication Server	The maximum percentage of disk cache I/O uses as reported by the deduplication server. This data set is only available for a TS7700D.