IBM DS6000 Series manual New performance statistics, Resource Measurement Facility RMF, 247

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12.2.7New performance statistics

There are two new sets of performance statistics that will be reported by the DS6000. Since a logical volume is no longer allocated on a single RAID rank with a single RAID type or single device adapter pair, the performance data will be provided with a new set of rank performance statistics and extent pool statistics. The RAID RANK reports will no longer be reported by RMF and IDCAMS LISTDATA batch reports. RMF and IDCAMS LISTDATA is enhanced to report the new logical volume statistics that will be provided on the DS6000. These reports will consist of back-end counters that capture the activity between the cache and the ranks in the DS6000 for each individual logical volume. The new rank and extent pool statistics will be disk system wide instead of volume wide only.

Note: Rank and extent pool statistics will not be reported by IDCAMS LISTDATA batch reports.

SETCACHE

The DASD fast write attributes cannot be changed to OFF status on the DS6000. Figure 12-1displays the messages you will receive when the IDCAMS SETCACHE parameters of DEVICE, DFW, SUBSYSTEM, or NVS with OFF are specified.

SETCACHE DEVICE OFF FILE(FILEX)

IDC31562I THE DEVICE PARAMETER IS NOT AVAILABLE FOR THE SPECIFIED

IDC31562I SUBSYSTEM OR DEVICE

IDC3003I FUNCTION TERMINATED. CONDITION CODE IS 12

SETCACHE DFW OFF FILE(FILEX)

IDC31562I THE DASDFASTWRITE PARAMETER IS NOT AVAILABLE FOR THE

IDC31562I SPECIFIED SUBSYSTEM OR DEVICE

IDC3003I FUNCTION TERMINATED. CONDITION CODE IS 12

SETCACHE SUBSYSTEM OFF FILE(FILEX)

IDC31562I THE SUBSYSTEM PARAMETER IS NOT AVAILABLE FOR THE SPECIFIED

IDC31562I SUBSYSTEM OR DEVICE

IDC3003I FUNCTION TERMINATED. CONDITION CODE IS 12

SETCACHE NVS OFF FILE(FILEX)

IDC31562I THE NVS PARAMETER IS NOT AVAILABLE FOR THE SPECIFIED

IDC31562I SUBSYSTEM OR DEVICE

IDC3003I FUNCTION TERMINATED. CONDITION CODE IS 12

Figure 12-1 SETCACHE options

All other parameters should be accepted as they are today on the IBM 2105. For example, setting device caching ON is accepted, but has no affect on the subsystem.

12.2.8 Resource Measurement Facility (RMF)

RMF support for the DS6000 is added via an SPE (APAR number OA06476, PTFs UA90079 and UA90080). RMF is enhanced to provide Monitor I and III support for the IBM TotalStorage DS family. The ESS Disk Systems Postprocessor report now contains two new

Chapter 12. zSeries software enhancements 247