Running the sizing tool script from the command line - assure_mimix - 6.0

Assure MIMIX for AIX Guide
Product type
Software
Portfolio
Integrate
Product family
Assure
Product
Assure MIMIX™ Software for AIX
Version
6.0
ft:locale
en-US
Product name
Assure MIMIX for AIX
ft:title
Assure MIMIX for AIX Guide
Copyright
2025
First publish date
2003
ft:lastEdition
2025-10-08
ft:lastPublication
2025-10-08T06:18:25.453000
L1_Product_Gateway
Integrate
L2_Product_Segment
IBM Infrastructure
L3_Product_Brand
Precisely Assure
L4_Investment_Segment
IBM i HA
L5_Product_Group
IBM i HA
L6_Product_Name
Assure MIMIX for AIX

Perform the following steps to run the sztool script from the command line.

Note: Before you run the Sizing tool you must have performed the installation steps described in Installing the sizing tool.
  1. To start the Assure MIMIX for AIX Sizing Tool, type /usr/scrt/sztool/sztool from the command line. The tool automatically creates a working directory /tmp/sztool, a config file /tmp/sztool/sztool.cfg and a diskinfo file /tmp/sztool/diskinfo. The diskinfo file contains a list of all LVs on the system. The user selects which LVs should be protected by Assure MIMIX for AIX. The working directory is for storing the config file, log file and tmp files. The configuration file is for user to specify LV names and other run time parameters.
  2. Review the diskinfo file and determine which LVs Assure MIMIX for AIX should protect.
  3. Modify the parameters in the sztool.cfg configuration file shown below: 
    LVs_1=testloglv testlv
LVs_2=
LVs_3=
LVs_4=
LVs_5=
LVs_6=
LVs_7=
LVs_8=
LVs_9=
LVs_10=
Collection_Interval_Count=24
Collection_Interval_Minutes=60
Lfc_Size_MB=16
Replication_Outage_Hours=8
CDP_Window_Hours=8
Snapshot_Duration_Hours=8

    The table below describes the configuration file parameters that you can modify:

    Parameter

    Description

    LVs_1=

    LVs_2=

    .....

    LVs_10=

    For example, you can enter LVs_1=LV1 LV2 LV2 LV4, with a space between each LV. Typically, you place three or five LV names per line as appropriate. You can add more LV names for any additional lines. If there are not any additional LV names, leave the remaining LVs lines blank.

    Collection_Interval_Count

    Specifies how many times you want to collect data. The default value is 24 hours.

    Collection_Interval_Minutes

    Specifies how many minutes to wait between each data collection interval. The default value is 60 minutes. Set the Collection_Interval_Count to 24 hours and the Collection_Interval_Minutes to 60 minutes. This is referred to as the 24*60 setting. This is the recommended configuration to use when you execute the sztool script.

    Lfc_Size_MB

    Specifies the size for the Assure MIMIX for AIX LFC.

    Replication_Outage_Hours

    Specifies the hours that the production server can not send LFCs to the recovery server. When this occurs, the LFCs will begin to backup on the Production Sever, until there are no more LFCs available. Once Assure MIMIX for AIX runs out of LFCs, it marks the regions which require synchronization in the state map as dirty. These dirty regions will automatically be synchronized when the LFCs become available. CDP functionality will resume as soon as the resynchronization completes. More LFCs are required as outage time increases.

    CDP_Window_Hours

    Specifies how many hours the data can go back in time to restore data from the recovery server to the production server. The window size determines the number of LFCs on the recovery server.

    Snapshot_Duration_Hours

    Specifies the number of hours you want to keep a snapshot valid. As the snapshot duration hours increase you need to increase the Write Journals disk space.
  4. Start your business application on the selected LVs. The load of the businesses application should be as close to the worst case scenario to ensure a meaningful result.
  5. Type /usr/scrt/sztool/sztool from the command line to restart the sztool. The sztool runs in background and you can check the results in the /tmp/sztool/sztool.log. Check the /tmp/sztool/sztool.log file to be sure the tool is running, one collection interval is required before LV I/O data is written to the /tmp/sztool/sztool.log. Check the /tmp/sztool/sztool.log after the last collection interval count for the final result. It is safe to log out from the terminal because “sztool” uses “nohup”. The process will take 24 hours with the default collection interval count of 24 and collection interval of 60 minutes.
  6. When the tool completes, check the log file or the AIX window. At the bottom of the log file or AIX window, the “<<---------<"  lines indicate the production and recovery server number of LFCs, and the percentage of Write Journal (WJ). The log file also contains detailed information for each LV IO statistics for each data collection interval. The standard log file is called sztool.log. An additional copy of the log file is also created, sztool.log-MM_DD_YYYY-HH:MM:SS. For example: sztool.log-02_19_2010-14_22_19, where HH is the 24 hour interval.