z/OS EADM performance Graphics

Some Historical Graphics

First a couple of historical EADM graphs that illustrate how storage performance has changed over the years.

Here's an example from 2010 of a customer who uses HDDs. You can see the effect of increased workloads during business hours, which almost doubles IO response times.
 
A report from 2010

Example of performance report from 2015 of a customer who uses SSD and Flash with Tierring. Things have improved, but response times are still inconsistent.
 
A report from 2015

   

Accelerate DB2 Write with zHyperWrite and "EADM™ by Improving DB2 Logs Volumes Response Time:

Analysis of z/OS disk and tape response times

Examples of EADM reports based on RMF file analysis. These reports run daily and provide information about z OS disk response times. As always the manufacturers say that the discs are fast but often this is not true. The customer can only know the truth if he analyzes with tools like EADM or equivalent. These are genuine customer reports, so the LPAR names are partially redacted to preserve confidentiality.

Disk response times - Peak hour Transaction processing over 1 month.
 
EADM performance features panel


 
Table showing worst performing volumes

Disk response times - Day time Transaction processing over 1 month.
 
EADM performance features panel


 
Table showing worst performing volumes

TAPE VTS / VSM / DLM repoonse times - Batch Transaction processing over 1 month.
 
EADM performance features panel


 
Table showing worst performing volumes

APE VTS / VSM / DLM repoonse times - Combined processing over 1 month.
 
EADM performance features panel


 
Table showing worst performing volumes

 

Performance Analysis over Several LPARS

A 24 hours detailed analysis of response times over 7 LPARs. These are genuine customer reports, so the LPAR names are partially redacted to preserve confidentiality.
 
EADM performance over 1 day

A 4 week analysis of TP response times.
 
EADM performance over 4 weeks for TP

4 week analysis of batch response times.
 
EADM performance over 4 weeks for batch

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Accelerate DB2 Write with zHyperWrite and "EADM™ by Improving DB2 Logs Volumes Response Time:

z/OS Storage and Datasets

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