IT07307: INCORRECT DS8000 SHORTFALL PERCENTAGE METRIC REPORTED IN TPC ALERTS.

IBM Spectrum Control V5.2.8 (December 2015)
IBM Spectrum Control V5.2.9 (February 2016)
IBM Spectrum Control V5.2.10 (May 2016)
IBM Spectrum Control V5.2.10.1 (July 2016)
IBM Spectrum Control V5.2.11 (August 2016)
IBM Spectrum Control V5.2.12 (November 2016)
IBM Spectrum Control V5.2.13 (March 2017)
IBM Spectrum Control V5.2.14 (May 2017)
IBM Spectrum Control V5.2.15 (August 2017)
IBM Spectrum Control V5.2.15.2 (November 2017)
IBM Spectrum Control V5.2.16 (March 2018)
IBM Spectrum Control V5.2.17 (May 2018)

APAR status

• Closed as fixed if next.

Error description

• TPC is generating alerts upon completion of DS8K probe jobs
  reporting an extremely high (and inaccurate) shortfall
  percentage value.  Alert code is ALR4545E.  In an observed case,
  the user had email alerts configured in TPC.  Sample email
  displaying this problem:
  Email sent from TPC Server
  Subject: Alert: ID=389989 Pool Shortfall Too High
  
  Alert tpcadmin.Pool Shortfall Too High has been triggered.
  
   The shortfall percentage is too high for pool <pool_name> on
  storage
  system DS8000-2107-75xxxx-IBM. The measured value 1131 %
  violates the
  critical boundary of 99 %.
  The alert message is logged in
  <tpc_install_dir>\device\log\traceTPCDeviceServer.log.trace
  which correlates to the alert displayed in the TPC GUI:
  2014-08-10 21:04:51.521-0400 Entry, parm 1 = ComputerID : 1001
  ResourceID :8337 ResourceType :209 MessageID : messageID Message
  :ALR4545E: The shortfall percentage is too high for pool
  <pool_name> on storage system DS8000-2107-75xxxxx-IBM. The
  measured value 1131 % violates the critical boundary of 99 %.
  com.ibm.tpc.monitor.clientalert.AlertManagerService
  sendAlertToClient Thread-50
  When this incorrect metric is observed in TPC, the true
  shortfall percentage metric can be calculated manually as
  documented here:
  http://www-01.ibm.com/support/knowledgecenter/SSNE44_5.2.1/com.i
  bm.tpc_V521.doc/fqz0_r_cr_storage_system_pools_space_rpt.html
  RECREATE STEPS:
  Configure TPC to alert on the shortfall percentage metric and
  run probes against DS8000-series storage devices.  Observe alert
  with invalid/high shortfall percentage metric.
  ________________________________________________________________
  DB2 Version used for Server:    N/A
  The defect is against component:   5608TPC00
  Server/Manager build/release (TPC):   5.2.1.0
  
  ________________________________________________________________
  Problem as described by customer:   Shortfall percentage
  reported too high in TPC
  Initial customer impact (low/med/high): low
  

Local fix

• Apply fixing PTF when available.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * TPC 5.2.x users with DS8000.                                 *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See ERROR DESCRIPTION.                                       *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Apply the updated release when it becomes available.         *
  ****************************************************************
  

Problem conclusion

Temporary fix

Comments

• A redesigned alerting mechanism is targeted to be available in
  an upcoming Spectrum Control release and will address this.  The
  issue is not addressed in Tivoli Storage Productivity Center
  5.2.7 or older.
  

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Modules/Macros

• DISK
  

Fix information

Applicable component levels

• R520 PSY

     UP

• R521 PSY

     UP

• R522 PSY

     UP

• R523 PSY

     UP

• R524 PSY

     UP

• R525 PSY

     UP

• R526 PSY

     UP