HVTHHC - Hydra Hnode Cache Activity File
At the DETAIL timespan, the Hydra Hnode Cache Activity File contains statistics on the Tape Volume Cache (TVC) size and throttle activity.
mics142
The Hydra Hnode Cache Activity File is derived from the IBM Virtualization Engine TS7700 Series Statistical Data, Hnode HSM Historical Record. This record is produced every 15 minutes. In addition, this file also contains a summarization of the statistics for each cache partition and preference groups from the HVTHCP and HVTHPG work files to the Hnode level.
File Organization
The table below identifies data elements by which the file is sequenced and summarized in each timespan. N/A indicates that the file is not supported in a timespan. At the DETAIL level, data is sequenced but not summarized.
The timespans in which a file is supported are defined by each installation when
MICS
is installed. Therefore, this table has been generated as part of the installation process to accurately reflect the MICS
system at your installation.HVTHHC Sort Sequence and Data Granularity
+---------+-------------------------------------------------+ |Timespan | Level of Data Granularity | +---------+-------------------------------------------------+ | | | | DETAIL |SYSID HVTGRID HVTCLID HVTNODE YEAR | | |MONTH DAY HOUR ENDTS | | | | | DAYS |SYSID HVTGRID HVTCLID HVTNODE YEAR | | |MONTH DAY HOUR | | | | | WEEKS |SYSID HVTGRID HVTCLID HVTNODE YEAR | | |WEEK ZONE HOUR | | | | | MONTHS |SYSID HVTGRID HVTCLID HVTNODE YEAR | | |MONTH ZONE | | | | | YEARS | N/A | | | | +---------+-------------------------------------------------+ | TABLES | N/A | +---------+-------------------------------------------------+ Generation Date: Thu, Apr 1, 2010
This file was generated with ESSENTIAL=ALL option in effect. All data elements that are defined in the file are generated.
This file was generated with DERIVED=DEFault option in effect. The complex definition of the DERIVED option controls whether the data elements are kept on the file on auxiliary storage.
Data Elements List
The following table identifies data elements that are contained in this file.
GENERATION DATE: Fri, Apr 8, 2022 Note: Essential data elements are identified by an "E" under the Timespan asterisk (*) column. Time- Data Data Element Span * Element Description (LABEL) ------- -------- ---------------------------------------- Sequence/Summary Data Elements XD....E DAY - Day of Month XDW...E HOUR - Hour of Day XDWM..E HVTCLID - Cluster ID XDWM..E HVTGRID - Grid Composite ID XDWM..E HVTNODE - Node ID XD.M..E MONTH - Month of Year XDWM..E SYSID - System Identifier XDW...E WEEK - Week of Year XDWM..E YEAR - Year of Century XDWM..E ZONE - Time Zone Common Data Elements XD....E DAYNAME - Name of Day of Week XDWM..E DURATION - Recording Interval Time XDWM..E ENDTS - End Time Stamp XDWM..E HVTDLSN - Distributed Library Sequence Number XDWM..E HVTMODEL - Node Machine Model XDWM..E HVTMTYPE - Node Machine Type XD....E HVTRVN - Record Version Number XDWM..E HVTSN - Node Serial Number XDWM..E HVTVECD - VE Code Level XDWM..E INTERVLS - Number of Recording Intervals XD....E ORGSYSID - Originating System Identification XDWM..E STARTTS - Start Time Stamp Retained Data Elements XDWM..E HHCAN - Active Node XDWM..E HHCBDCT - Base Deferred Copy Throttle Value (Sec) X.....E HHCCTR - Copy Throttle Reason X.....E HHCDCTR - Deferred Copy Throttle Reason XDWM..E HHCDRV - Disaster Recovery Volume X.....E HHCHWTR - Host Write Throttle Reason XDWM..E HHCPMT - Pre-migration Throttle Threshold (GB) XDWM..E HHCTBDCT - TA Base Deferred Copy Throttle (Sec) X.....E HHCTCTR - TA Copy Throttle Reason X.....E HHCTDCTR - TA Deferred Copy Throttle Reason X.....E HHCTHWTR - TA Host Write Throttle Reason X.....E HHCTPPT - Temp Pre-Mig Priority Threshold (GB) X.....E HHCTPTT - Temp Pre-Mig Throttle Threshold (GB) Accumulated Data Elements XDWM..E HHCCHM - Virtual Cache-Hit Mounts XDWM..E HHCCMM - Virtual Recall Mounts XDWM..E HHCCPLFS - CT - Low on Cache Free Space XDWM..E HHCCPNOT - CT - No Throttling XDWM..E HHCCPPSS - CT - Pre-migrate Steady State XDWM..E HHCCPTCT - Copy Predominate Throttle count XDWM..E HHCDCCRU - DCT - Cluster Resource Usage XDWM..E HHCDCHIO - DCT - Preferring Host IO XDWM..E HHCDCIMC - DCT - Immediate Copy Throttling XDWM..E HHCDCNOT - DCT - No Throttling XDWM..E HHCDCTCT - Deferred Copy Throttle Count XDWM..E HHCDRIC - Sum of Data Resident in Cache (GB) XDWM..E HHCFICCR - Compressed Bytes Read FICON (MB) XDWM..E HHCFICCW - Compressed Bytes Written FICON (MB) XDWM..E HHCFICUR - Uncompressed Bytes Read FICON (MB) XDWM..E HHCFICUW - Uncompressed Bytes Written FICON (MB) XDWM..E HHCFRM - Virtual Fast-Ready Mounts XDWM..E HHCFTM - Virtual Fast-Ready Mount Time XDWM..E HHCHTM - Virtual Cache-Hit Mount Time XDWM..E HHCHWECC - HWT - Excess Cached Content for Copy XDWM..E HHCHWGPS - HWT - Grid Pre-migrate Steady State XDWM..E HHCHWIMC - HWT - Immediate Copy Throttling XDWM..E HHCHWLFS - HWT - Low on Cache Free Space XDWM..E HHCHWNOT - HWT - No Throttling XDWM..E HHCHWPSS - HWT - Pre-migrate Steady State XDWM..E HHCLZ4CR - Compressed Bytes Read LZ4 (MB) XDWM..E HHCLZ4CW - Compressed Bytes Written LZ4 (MB) XDWM..E HHCLZ4UR - Uncompressed Bytes Read LZ4 (MB) XDWM..E HHCLZ4UW - Uncompressed Bytes Written LZ4 (MB) XDWM..E HHCRTM - Virtual Recall Mount Time XDWM..E HHCSACT - Sum of Avg Copy Throttle XDWM..E HHCSATCT - Sum of Avg TA Copy Throttle XDWM..E HHCSATDT - Sum of Avg TA Deferred Copy Throttle XDWM..E HHCSATOT - Sum of Overall Average TA Throttle XDWM..E HHCSATWT - Sum of Avg TA Write Overrun Throttle XDWM..E HHCSAWOT - Sum of Avg Write Overrun Throttle XDWM..E HHCSCP - Sum of Active Cache Partitions XDWM..E HHCSCPB - Sum of Avg CPU Percent Busy XDWM..E HHCSDCT - Sum of Avg Deferred Copy Throttle XDWM..E HHCSLM - Sync Mode Mounts XDWM..E HHCSMD - Sum of Size of Migrated Data (GB) XDWM..E HHCSMDU - Sum of Average Max Disk Usage Percentage XDWM..E HHCSOBJC - Sum of Objects in Cache XDWM..E HHCSTM - Sync Mode Mount Time XDWM..E HHCSTOAT - Sum of Overall Average Throttle XDWM..E HHCSTUC - Sum of Total Used Cache (GB) XDWM..E HHCSTUFC - Sum of Total Used Flash Cache (GB) XDWM..E HHCTCPLF - CT/TA - Low on Cache Free Space XDWM..E HHCTCPNO - CT/TA - No Throttling XDWM..E HHCTCPPS - CT/TA - Pre-migrate Steady State XDWM..E HHCTCPTC - TA - Copy Predominate Throttle Count XDWM..E HHCTDCCR - DCT/TA - Cluster Resource Usage XDWM..E HHCTDCHI - DCT/TA - Preferring Host IO XDWM..E HHCTDCIM - DCT/TA - Immediate Copy Throttling XDWM..E HHCTDCNO - DCT/TA - No Throttling XDWM..E HHCTDCTC - TA - Deferred Copy Throttle Count XDWM..E HHCTHWEC - HWT/TA - Excess Cached Content for Copy XDWM..E HHCTHWGP - HWT/TA - Grid Pre-migrate Steady State XDWM..E HHCTHWIM - HWT/TA - Immediate Copy Throttling XDWM..E HHCTHWLF - HWT/TA - Low on Cache Free Space XDWM..E HHCTHWNO - HWT/TA - No Throttling XDWM..E HHCTHWPS - HWT/TA - Pre-migrate Steady State XDWM..E HHCTVC - Sum of Total Cache Size (GB) XDWM..E HHCTVM - Total Virtual Mounts XDWM..E HHCTWRTC - TA - W/Overrun Predominate Throttle Cnt XDWM..E HHCVVIC - Sum of Virtual Volumes in Cache XDWM..E HHCWROCT - W/Overrun Predominate Throttle Count XDWM..E HHCZSTCR - Compressed Bytes Read ZSTD (MB) XDWM..E HHCZSTCW - Compressed Bytes Written ZSTD (MB) XDWM..E HHCZSTUR - Uncompressed Bytes Read ZSTD (MB) XDWM..E HHCZSTUW - Uncompressed Bytes Written ZSTD (MB) Maximum Data Elements XDWM..E HHCMXCPB - Max CPU Usage Percentage XDWM..E HHCMXMDU - Max Disk Usage Percentage Derived Data Elements XDWM..E HHCAVACP - Avg Active Cache Partitions XDWM..E HHCAVCHM - Avg Virtual Cache-Hit Mounts XDWM..E HHCAVCMM - Avg Virtual Recall Mounts XDWM..E HHCAVCPU - Avg CPU Percent Busy XDWM..E HHCAVCTV - Avg Copy Predominate Throttle Value XDWM..E HHCAVDCT - Avg Deferred Copy Throttle Value XDWM..E HHCAVDRC - Avg Data Resident in Cache (GB) XDWM..E HHCAVFRM - Avg Virtual Fast-Ready Mounts XDWM..E HHCAVFTM - Avg Virtual Fast-Ready Mount Time XDWM..E HHCAVHTM - Avg Virtual Cache-Hit Mount Time XDWM..E HHCAVMDU - Avg Max Disk Usage Percentage XDWM..E HHCAVOAT - Avg Overall Throttle Value XDWM..E HHCAVOBJ - Avg Objects in Cache XDWM..E HHCAVRTM - Avg Virtual Recall Mount Time XDWM..E HHCAVSMD - Avg Size of Migrated Data (GB) XDWM..E HHCAVSTM - Avg Sync Mode Mount Time XDWM..E HHCAVTCT - Avg TA Copy Throttle Value XDWM..E HHCAVTDT - Avg TA Deferred Copy Throttle Value XDWM..E HHCAVTOT - Avg TA Overall Throttle Value XDWM..E HHCAVTUC - Avg Used Cache (GB) XDWM..E HHCAVTVC - Avg Cache Size (GB) XDWM..E HHCAVTVM - Avg Virtual Mounts XDWM..E HHCAVTWT - Avg TA Write Overrun Throttle Value XDWM..E HHCAVUFC - Avg Used Flash Cache (GB) XDWM..E HHCAVVSZ - Avg Virtual Volume Size (MB) XDWM..E HHCAVVVC - Avg Virtual Volumes in Cache XDWM..E HHCAVWOT - Avg Write Overrun Throttle Value XDWM..E HHCPCCHM - Pct Virtual Cache-Hit Mounts XDWM..E HHCPCCMM - Pct Virtual Recall Mounts XDWM..E HHCPCCPT - Pct Copy Predominate Throttle XDWM..E HHCPCCUT - Pct Cache Utilization XDWM..E HHCPCDCT - Pct Deferred Copy Throttle XDWM..E HHCPCFRM - Pct Virtual Fast-Ready Mounts XDWM..E HHCPCTCT - Pct TA - Copy Predominate Throttle XDWM..E HHCPCTDT - Pct TA - Deferred Copy Throttle XDWM..E HHCPCTWT - Pct TA - W/Overrun Predominate Throttle XDWM..E HHCPCVCM - Pct Virtual Cache-Miss Mounts XDWM..E HHCPCWOT - Pct W/Overrun Predominate Throttle XDWM..E HHCPSCHM - Virtual Cache-Hit Mounts (per/sec) XDWM..E HHCPSCMM - Virtual Recall Mounts (per/sec) XDWM..E HHCPSFRM - Virtual Fast-Ready Mounts (per/sec) XDWM..E HHCPSTVM - Total Virtual Mounts (per/sec)
For a detailed description of individual data dictionary elements, see Hydra Hnode Cache Activity (HVTHHC).
Usage Considerations
None
Retrieval Examples
In the example, a SAS macro variable is used to specify the DDname part of the
MICS
file name. These macro variables are a standard part of MICS
and are available for all files. The macro variable name has the form &diiit, where d is the database identifier, iii is the information area name, and t is the timespan. For the example, a database identifier of P is used. The identifier is installation-dependent, so you should find out what the identifiers are at your installation.- Using the most recent DAYS timespan HVTHHC file, display the throttling statistics on the tape server, per hour. Display the throttle percent buckets and throttle values for write-overrun, copy-predominant, and deferred-copy activities. A report with all zeros is good. If any throttle values are significantly large or continue for extended periods of time, further investigation might be required.DATA; SET &pHVTd..HVTHHC01; DATE=DATEPART(ENDTS) ; FORMAT DATE DATE8. ; * ; PROC PRINT LABEL PAGEBY HVTCLID; ID DATE HOUR ; VAR HHCPCWOT HHCAVWOT HHCPCDCT HHCAVDCT HHCPCCPT HHCAVCTV; TITLE 'Throttle Activty'; RUN;