(2002) Offloading analysis
Purpose of offloading analysis is to identify list of InfoProviders suitable for offloading. Analysis is collecting and evaluating multiple statistics about each InfoProvider in order to reduce your database in easy way. You setup analysis once and just wait for email notification with results or suggestions.
Setup
Initial setup consist of two parts. Initial setup of system and BW Analysis setup
- Go to transaction /DVD/HS_OFF_SETUP
- Initial system setup
- Install license if needed
- Fill customer information
- Insights customer ID
- if you don't have your customer ID you can e.g. number 123
- Customer name
- Insights customer ID
- Fill administrator information
- email address will be used for receiving notification or results
- Leave selected 'Only central' deployment scenario
- Fill central customizing
- User name for execution of background jobs
- Sender e-mail address for notifications or results
- Confirm setup with Complete button
- See setup logs and click Exit
- BW Analysis setup
- Confirm that system will be added to system landscape
- Confirm that you want to continue with BW Analysis setup
- See setup logs
Analysis is executed immediately after finishing setup. Once analysis is done and results are ready e-mail notification is send to you. Please be aware that analysis can take multiple hours, depending on your database size and system performance.
Notification email
Once results of the analysis are ready you will receive notification email with following information:
- size of database that you could save
- list of InfoProviders that fulfil offloading rules
- step list to offload proposed InfoProviders
- criteria used for InfoProvider list creation
- 2 attachments
- shortcut file to see result in SAP system
- JSON file with necessary information for offloadnig
Offloading analysis viewer
Result are available using transaction /DVD/HS_OFFD directly on analysed system.
InfoProviders that fulfil offloading rules are displayed in results. Following table show meaning of particular columns in result table.
Column | Description |
---|---|
Object | contains technical name of an InfoProvider |
Type | displays a type of an InfoProvider (InfoCube, DSO, aDSO, WODS) |
Description | long description of an InfoProvider |
Off. interface | recommended offloading interface |
Info | detailed information about available offloading interfaces and special functions recommended for InfoProvider |
Size [MB] | total object size in MB
table size calculation differs by various database types
|
Off. pot. size [MB] | offloading potential size in MB
|
Off. % | offloading potential size in percentage relative to object size |
Rows | number of rows in InfoProvider data tables (same tables are used as in the size calculation) |
Number of queries | the total number of queries that read data in an InfoProvider
|
Trend - Number of queries | visualization displaying the usage of data areas - values are rounded to natural numbers |
Trend - Size [MB] | visualization displaying the size of data areas - values are rounded to natural numbers |
Split characteristic | describes applied time characteristic
|
Condition | recommended offloading condition
|
Archived size [MB] | size of unpacked archived data in MB
|
DTP source count | how many times an InfoProvider is used as a source in DTP load requests |
Last DTP exec. | timestamp of the last DTP load request execution |
DTP dest. count | number of DTP requests loaded into an InfoProvider (including reloaded requests from an archive) |
DTP dest. relv | number of requests (DTPs for InfoCubes, activation requests for DSOs) relevant for straggler analysis
|
DTP stragglers | number of requests with straggler records /wiki/spaces/ITOA/pages/560103425
|
DTP stragg. rows | number of rows which represent straggler records |
Number of lookups | number of lookups that are present in a system for an InfoProvider
|
Due to readability of result table not all columns are displayed by default. To show or hide columns, you can choose from predefined ALV layouts or create your own.
Notification settings
Email address that was set during setup will be receiving notifications about potential offloading candidates. You are able to change delivery parameters as follows:
Find menu Notifications and chose Advanced settings.
List of notification parameters
In o
Tech. name | Description | Details |
---|---|---|
ENABLED | Notifications enabled | If value if set to X notification are enabled if value is empty notification are disabled |
LAST_MAIL_TIMESTAMP | Timestamp of last email | Timestamp of last sent email to notification email address in format YYYYMMDDHHmmss, if value is empty no email was sent yet |
Recipient e-mail | Email address used for notifications | |
NEXT_MAIL_DAYS | Send next email after (days) | Time period in days when email could be send to recipient e.g.
|
OFFLOADING_VARIANT | Offloading variant that be used | Offloading variant used for calculation of suitable candidates for offloading |
SAP_USER | SAP GUI User | Name of SAP user that will be pre-filled in shortcut attached to email |
Offloading rules
InfoProvider are display in results only in case it fits to rules. Product installation provides default rule values, however you can adjust rule values according to your archiving strategy. Here you can find available rules:
Rule description | Default value | Details |
---|---|---|
Size of InfoProvider is greather than X MB | 0.1 % of database size | Rule will avoid offloading for too small objects by setting size threshold for InfoProvider |
Data partition usage is less than X query executions | 60 | Rule will avoid offloading often used data partitions. Smallest data partition that can be identified is one month, therefore value 60 means that data from particular month cannot be used more than 60 times in analysis time range, if so it will not be included to offloading condition |
Size of data partition is bigger than X MB | 1 | Rule will avoid offloading for too small data partitions by setting size threshold |
Do not offload data newer than X months | 12 | Rule is setting retention period for online data. For default value data that are newer than 12 months are excluded from offloading condition |
Analysis time range: last X months | 3 | Viewer is using data only from last 3 months by default. If you collecting data for multiple months you can change this parameters to bigger value. If you start with data collection within last 3 month it will not give you more information |
Rule values can be changed by click on Rules button.
You can define additional "rules" by setting filters to ALV table. When you than hit save button all rules are saved together in offloading variant.
Example: How to set additional filter
Chose column which you want to filter
Set select option e.g. all object starts to Z
Confirm and save offloading variant
Offloading variants
Offloading variant contains rule values as well as ALV filters. You can create multiple variants in order to compare different offloading strategies. One offloading variant can be set as default for calculation of notification email and for Actions queue. Default offloading variant cannot be changed, but you can create you own.
Set offloading variant for notifications
Initial installation contains default offloading variant that is used for notification. If you want to get notifications based on your own offloading variant proceed as follows.
Notifications > Set current variant
Offloading interface availability
Offloading analysis can recommend two offloading interfaces for object:
Offloading interface | Description |
---|---|
DTO | SAP BW/4HANA Data Tiering Optimization |
SDA+ | OutBoard DataTiering with SDA+ |
Interface is recommended by multiple criteria. Here you can find main criteria:
- System prerequisites required by interface implementation
- InfoProvider type support
- InfoProvider requirements to interface
- special functions e.g. WRITER
Export configuration
If you chooses InfoProviders that should be offloaded you can select them and export their offloading related configuration into file. This file can be than imported to development system in order to create offloading DataProviders. There are two ways to get configuration:
- Notification email contains configuration file
- Download configuration file from result viewer
- chose object that you want to export (if nothing is selected everything is exported)
- click on button Export configuration
Information how to add DataProviders using configuration JSON file you can find here: (2002) DataTiering Main Screen (find Define DP from file)