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7. Right-click a low-priority port and then select Prio ->> Non-Prio from the pop-up menu. If there
is more than one low-priority port, repeat this operation.
The Attribute column displays Non-Prio.
You must set upper limit values for the Non-prio. specified ports. For detail about the setting
of upper limit values, see “Setting upper-limit values to traffic at non-prioritized ports” (page 55).
8. Click Apply. The settings on the window are applied to the storage system.
After priority has been set, you can implement the procedure for measuring traffic (I/O rates and
transfer rates). See “Monitoring operation” (page 28).
Setting upper-limit values to traffic at non-prioritized ports
After you analyze traffic statistics, you must set upper limit values to I/O rates or transfer rates for
non-prioritized ports. Upper limit values for I/O rates are used to suppress the number of I/Os
from the low priority host servers and thus provide better performance for high-priority host servers.
Upper limit values for transfer rates are used to suppress the amount of data that should be
transferred between the storage system and the low priority ports, and thus provide better
performance for high-priority host servers.
1. Click Reports > Performance Monitor> Performance Control to open the Performance Control
window.
2. Click to change to Modify mode.
3. In the Performance Control window, click Performance Control. The Performance Control main
window appears.
4. Select the Port tab.
5. Do one of the following:
• To limit the I/O rate for the non-prioritized port, select IOPS from the list at the upper left
corner of the list.
• To limit the transfer rate for the non-prioritized port, select MB/s from the list at the upper
left corner of the list.
6. Locate the non-prioritized port in the list.
NOTE: The Attribute column of the list indicates whether ports are prioritized or non
prioritized. If you cannot find any non prioritized port in the list, check the list at the top right
corner of the window. If the list displays Prioritize, select All or Non Prioritize from the list.
7. Do one of the following:
• To limit the I/O rate for the non-prioritized port, double-click the desired cell in the IOPS
column in Upper. Next, enter the upper limit value in the cell.
• To limit the transfer rate for the non-prioritized port, double-click the desired cell in the
MB/s column in Upper. Next, enter the upper limit value in the cell.
In the list, either of IOPS or MB/s column is activated depending on the rate selected at
step 3 above. You can use either of them to specify the upper limit value for one port.
You can specify different types of rates (IOPS or MB/s) for the upper limit values of different
non-prioritized ports.
The upper limit value that you entered is displayed in blue.
8. Click Apply. The settings in the window are applied to the storage system. The upper limit
value that you entered turns black.
If an upper limit of the non-prioritized WWN is set to zero or nearly zero, I/O performance might
be lowered. If I/O performance is lowered, the host cannot be connected to the storage system
in some cases.
Port tab operations 55
- Mainframe Systems User Guide 1
- Contents 3
- 4 Contents 4
- Contents 5 5
- 6 Contents 6
- Contents 7 7
- 1 Performance overview 8
- Cache Residency overview 9
- 10 Performance overview 10
- Placing data in cache 13
- Prestaging specific data 13
- Priority mode 14
- Bind mode 14
- Using Performance Control 18
- Using Performance Control 19 19
- WWN monitoring data 20
- Microprogram replacement 20
- 4 Monitoring WWNs 23
- Editing the WWN nickname 24
- Connecting WWNs to ports 24
- 5 Monitoring CUs 26
- 6 Monitoring operation 28
- Stopping monitoring 29 29
- Viewing statistics 30
- 8 Working with graphs 32
- Usage rates of MPs 34
- Usage rate of cache memory 35
- Write pending statistics 35
- Access paths usage statistics 36
- Throughput of storage system 37
- Size of data transferred 38
- Response times 39
- Cache hit rates 40
- Storing period 41
- Back-end performance 42
- Hard disk drive access rates 43
- 9 Changing display of graphs 45
- Deleting graph panel 46
- Port tab operations 53
- Analyzing traffic statistics 54
- Port tab operations 55 55
- Setting a threshold 56
- WWN tab operations 57
- WWN tab operations 61 61
- WWN tab operations 63 63
- Grouping host bus adapters 65
- Renaming an PFC group 67
- Deleting an PFC group 68
- 11 Estimating cache size 69
- 70 Estimating cache size 70
- 72 Estimating cache size 72
- Cache Residency cache areas 73
- 12 Managing resident cache 75
- 76 Managing resident cache 76
- Launching Cache Residency 77
- 78 Managing resident cache 78
- 80 Managing resident cache 80
- 13 Troubleshooting 82
- Contacting HP 83
- Related information 83
- Typographic conventions 84
- Typographic conventions 85 85
- A Export Tool 86
- Installing the Export Tool 87 87
- Using the Export Tool 88
- Using the Export Tool 89 89
- 90 Export Tool 90
- Preparing a batch file 91
- Running the Export Tool 92
- Processing time 93
- Termination code 93
- Log files 94
- Error handling 94
- Export Tool command reference 95
- Subcommand list 96
- outoption compressapply 97
- Operands 102
- Examples 108
- Short-range 109
- Description 111
- ◦ Default: 20 minutes 116
- ◦ Minimum: 1 minute 116
- Exported files 117
- Port statistics 124
- Volumes (LU) statistics 125
- MP blades 126
- Monitored CUs tab 138
- Monitored WWNs tab 138
- Edit Monitoring Switch wizard 139
- Monitor Performance window 140
- Data Range 141
- Time Range 141
- Performance Objects 141
- Selected Objects table 142
- Object field is blank 145
- Available Objects table 147
- Edit CU Monitor Mode wizard 148
- Unmonitored CUs table 149
- Confirm window 150
- View CU Matrix window 152
- Available Parity Groups table 154
- Parity Group Properties table 154
- Edit WWN wizard 155
- Edit WWN Monitor Mode wizard 156
- Unmonitored WWNs table 157
- Delete Unused WWNs window 160
- Add New Monitored WWNs wizard 160
- WWN Name 161
- Available Ports table 161
- Selected WWNs table 161
- Add to Ports wizard 163
- Monitor window 165
- Graph panel 166
- MP Properties window 167
- Edit Time Range window 168
- Setting fields 169
- Monitor Data 170
- Performance Object Selection 170
- Add Graph window 177
- Wizard buttons 185
- Navigation buttons 185
- Performance Control window 187
- Cache Residency window 195
- LDEV Information table 196
- Cache Information 197
- Operations box 198
- Multi Set dialog box 199
- Multi Release dialog box 200
- Multi-Release LDEV table 201
- Glossary 202
- 204 Index 204
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