In This Section:
When you build a partition, each database in the partition uses a partition definition file to record all information about the partition, such as its data source, data target, and the areas to share. Partition creation requires Database Manager permissions or higher.
After you have created a partition, load and calculate the database that contains the partition. Loading and calculating the partition may require you to change existing rules files and calculation scripts. See Understanding Data Loading and Dimension Building and Calculating Essbase Databases.
See Partition Types.
Define the data source and data target, including specifying the source application and database, the target application and database, and the location of each. For a list of supported block and aggregate storage data source and data target combinations for each partition type, see Data Sources and Data Targets.
To set up the data source and the data target:
In the hosts file, add an entry using the following syntax:
IP_address hostname.domainname alias [alias]
22.214.171.124 myhost.mydomain abcdefg.hijk.123
By default, all changes made on the data source outline overwrite the data target outline when you synchronize the outlines. You can, however, specify that changes made to the data target outline overwrite the data source outline when you synchronize the outlines.
You must specify a user name and password for Essbase to use when it communicates between the data source and the data target. The user name and password must be identical on the data source and the data target. Essbase uses this user name and password to:
You can define or edit the areas of the data source to share with the data target in a partition. An area is a subcube within a database and a partition comprises one or more areas. For example, an area could be all Measures at the lowest level for Actual data in the Eastern region.
When you define a replicated area, ensure that the data source and data target contain the same number of cells. The shape of the two partitions must match. For example, if the area in the data source covers 18 cells, the data target should contain an area covering 18 cells into which to put those values. The cell count does not include the cells of attribute dimensions.
You can use substitution variables in a partition area definition, which provides flexibility in sharing different data at different times. See Substitution Variables in Partition Definitions.
To create a partition, Essbase must be able to map all shared data source members to data target members. Oracle recommends that data source member names and data target member names are the same to reduce maintenance requirements for the partition, especially when the partition is based on member attributes.
If the data source and data target contain the same number of members and use the same member names, Essbase automatically maps the members. You need only validate, save, and test the partitions. If Essbase cannot map automatically, you must map manually.
You can use substitution variables for member names in mapping specifications. See Substitution Variables in Partition Definitions.
If the data source outline and data target outline contain different members, or if the members have different names in each outline, you must map the data source members to the data target members. In the following example, the first two member names are identical, but the third member name is different:
Source Target Product Product Cola Cola Year Year 1998 1998 Market Market East East_Region
Because you know that East in the data source corresponds to East_Region in the data target, map East to East_Region. Then, all references to East_Region in the data target point to East in the data source. For example, if the data value for Cola, 1998, East is 15 in the data source, the data value for Cola, 1998, East_Region is 15 in the data target.
The number of dimensions in the data source and data target may vary. The following example illustrates a case where there are more dimensions in the data source outline than in the data target outline:
Source Target Product Product Cola Cola Market Market East East Year 1999 1998 1997
Source Target @DESCENDANTS(Market), 1997 @DESCENDANTS(Market)
Source Target 1997 Void
When you map a member from an extra dimension, the partition results reflect data only for the mapped member. In the above example, the Year dimension contains three members: 1999, 1998, and 1997. If you map member 1997 from the data source to the data target, the partition results reflect Product and Market data only for 1997. Product and Market data for 1998 and 1999 will not be extracted.
Source Target Product Product Cola Cola Market East Year Year 1997 1997
Source Target @IDESCENDANTS(Product) @IDESCENDANTS(Product), East
Source Target Void East
You cannot map members of attributes dimension in replicated partitions (see Rules for Replicated Partitions). You can, however, map attributes in transparent and linked partitions (see Attributes in Partitions).
In the following example, the outline for the data source contains a Product dimension with a member 100 (Cola). Children 100-10 and 100-20 are associated with member TRUE of the Caffeinated attribute dimension, and child 100-30 is associated with member FALSE of the Caffeinated attribute dimension.
The data target outline has a Product dimension with a member 200 (Cola). Children 200-10 and 200-20 are associated with member Yes of the With_Caffeine attribute dimension, and child 200-30 is associated with No of the With_Caffeine attribute dimension.
Source Target @DESCENDANTS(100) @DESCENDANTS(200) @DESCENDANTS(East) @DESCENDANTS(East)
Source Target 100–10 200–10 100–20 200–20 100–30 200–30 Caffeinated With Caffeine Caffeinated_True With_Caffeine_True Caffeinated_False With_Caffeine_False
If you map attribute Caffeinated_True to attribute With_Caffeine_No, you receive an error message during validation. You must associate caffeinated cola from the data source to caffeinated cola in the data target.
An attribute dimension or an attribute member can exist in the outline of the data source but not in the outline of the data target, or in the outline of the data target but not in the outline for the data source. For example:
Source Target Caffeinated True False
If, however, you need to control how Essbase maps members at a more granular level, you may need to use area-specific mapping, which maps members in one area to members in another area only in the context of a particular area map.
Because Essbase cannot determine how to map multiple members in the data source to a single member in the data target, you must logically determine how to divide your data until you can apply one mapping rule to that subset of the data. Then use that rule in the context of area-specific mapping to map the members.
To create area-specific mappings, see “Defining Area-Specific Member Mappings in Partitions (Optional)” in the Oracle Essbase Administration Services Online Help.
Source Target Product Product Cola Cola Market Market East East Year Year 1998 1998 1999 1999 Scenario Actual Budget
You know that 1998 in the data source should correspond to 1998, Actual in the data target and 1999 in the data source should correspond to 1999, Budget in the data target. So, for example, if the data value for Cola, East, 1998 in the data source is 15, the data value for Cola, East, 1998, Actual in the data target should be 15.
Because mapping works on members, not member combinations, you cannot simply map 1998 to 1998, Actual. Define the area (1998 and 1998, Actual) and then create area-specific mapping rules for that area.
Source Target Market Customer_Planning NY NY_Actual CA NY_Budget CA_Actual CA_Budget Scenario Actual Budget
You know that NY and Actual in the data source should correspond to NY_Actual in the data target and NY and Budget in the data source should correspond to NY_Budget in the data target. So, for example, if the data value for NY, Budget in the data source is 28, the data value for NY_Budget in the data target should be 28.
Because mapping works on members, not member combinations, you cannot simply map NY, Actual to NY_Actual. Define the area (NY and Actual, and NY_Actual) and then create area-specific mapping rules for that area.
Because the data target does not have NY and CA members, you must also map these members to Void in the data target so that the dimensionality is complete when going from the data source to the data target.
When you create a partition, validate it to ensure its accuracy before you use it. Database Manager permissions or higher are required. After you validate, save the partition definition. If necessary, you can edit an existing partition.
For replicated and transparent partitions, a replication target does not overlap with a replication target; a replication target does not overlap with a transparent target; and a transparent target does not overlap with a transparent target.
Although you can save a partition with mapping errors, operations using that partition will fail until the mapping errors are fixed.
When you partition a database, Essbase must be able to map each dimension and member in the data source outline to the appropriate dimension and member in the data target outline. After you map the two outlines to each other, Essbase can make the data in the data source available from the data target, as long as the outlines are synchronized and the partition definitions are up-to-date.
If you make changes to one outline, the two outlines are no longer synchronized. Although Essbase makes whatever changes it can to replicated and transparent partitions when the outlines are not synchronized, Essbase may not be able to make the data in the data source available in the data target.
Essbase does not enable automatic synchronization of aggregate storage outlines. You must manually make the same changes to the source and target outlines.
By default, the source outline is from the same database as the data source; that is, outline and data changes flow in the same direction. For example, if the East database is the data source and the Company database is the data target, the default source outline is East.
You can also use the data target outline as the source outline. Consider this method if the structure of the outline (its dimensions, members, and properties) is maintained centrally at a corporate level, while the data values in the outline are maintained at the regional level (for example, East). Administrators can make changes in the Company outline and apply those changes to each regional outline when the outline is synchronized.
If you make changes to the target outline, those changes cannot be propagated back to the source outline when you synchronize the outlines. To move these changes up to the source outline, make those changes in Outline Editor. See Creating and Changing Database Outlines.
Essbase updates as many changes as possible to the target outline. If Essbase cannot apply all changes, a warning message prompts you to see the application log for details. Messages that pertain to outline synchronization are prefixed with OUTLINE SYNC. See Viewing the Essbase Server and Application Logs.
To set the source outline, see Setting up the Data Source and the Data Target.
To synchronize block storage outlines, use a tool:
For synchronizing non-Unicode-mode outlines with multibyte characters, you can use only non-Unicode clients such as ESSCMD or MaxL statements executed through the MaxL Shell.
When you make changes to the source outline, Essbase takes the following actions:
Records the changes in a change log named essxxxx.chg, where xxxxx is the number of the partition. If you have multiple partitions on a source outline, Essbase creates a change log for each partition.
Creates or updates the outline change timestamp for that partition in the partition definition (.ddb) file. Each partition defined against the source outline has a separate timestamp in the .ddb file.
When you pull changes from the outline source, Essbase takes the following actions:
Compares the last updated timestamp in the target outline .ddb file to the last updated timestamp in the source outline backup (.dbb) file. Essbase updates the target timestamp when it finishes synchronizing the outlines using the last updated time on the source outline, even if the two outlines are on servers in different time zones.
If the source outline has changed since the last synchronization, Essbase retrieves those changes from the source outline change log and places them in the target outline change log. The change logs may have different names on the source outline and the target outline.
When you select the changes to apply to the target outline, Essbase takes the following actions:
Applies the changes to the target outline.
Updates the timestamp in the target outline’s .ddb file, using the time from the source outline.
An actual member and its shared members in the source outline are propagated to the target outline if at least one actual or shared member is defined in the partition area. As illustrated in Figure 60, Shared Members and Outline Synchronization, the partition definition is @IDESC(“Diet”). The parent 100 and its children (100-10, 100-20, 100-30) are not defined in the partition area. The parent Diet and its children (100-10, 100-20, 100-30) are defined in the partition area. The children of Diet are shared members of the actual members.
If you make a change to an actual member in the undefined partition area, such as adding an alias to the 100-10 actual member, that change is propagated to the target outline because it is associated with a shared member in the defined partition area.
Any change made to a member that does not have at least one actual member (or shared member) in the defined partition area is not propagated to the target outline. For example, in Figure 60, Shared Members and Outline Synchronization, a change to the parent 100 is not propagated to the target outline because it is in the undefined partition area and does not have an associated shared member in the defined partition area.
If a shared member is included in the partition area, it is recommended to include its parent. In the above example, the parent Diet is included in the outline because its children are shared members and in the defined partition area.
Implied shared members are treated the same as shared members during outline synchronization. Actual members and their implied shared members in the source outline are propagated to the target outline if at least one actual or implied shared member is defined in the partition definition.
Using the partition definition as @CHILD(“A”) in the example in Figure 61, Implied Shared Members and Outline Synchronization, A1 and A2 are in the defined partition area, and A11, A21, and A22 are in the undefined partition area. Although A11 (implied shared member) is in the undefined partition area, a change to A11 is propagated to the target outline because its parent, A1, is in the defined partition area. The change to the children A21 and A22 is not propagated to the target outline because these members are not defined in the partition area and are not associated with a member that is in the defined partition area.
The administrator should regularly update data in a replicated partition. How frequently you update replicated partitions depends on user requirements for up-to-the-minute data. Essbase keeps track of when the data source was last changed and when the data target was last updated so that you can determine when to update replicated partitions. This information is saved at the data source. The administrator of either the data source site or data target site can be responsible for replicating data.
Follow these guidelines:
Unless you update all cells, replication does not update target data when the source data has not changed since the last replication.
By default, Essbase replicates #MISSING cells. If you do not want to replicate #MISSING cells, you can use the DISABLEREPLMISSINGDATA configuration setting in the essbase.cfg file. See the Oracle Essbase Technical Reference.
If you deleted data blocks on the data source, Essbase updates all data cells at the data target, even if you choose to update only changed cells. You can delete data blocks at the data source using any of these methods:
Using the CLEARDATA command in a calculation script
Using “Clear combinations” in your rules file during a data load
Issuing CLEAR UPPER, CLEAR INPUT or RESETDB commands in Administration Services;
Restructuring the database keeping only level 0 or input data
Deleting sparse members
For example, if you replicate all data targets connected to the Sampeast.East database, Essbase updates the Budget, Actual, Variance, and Variance % members in the Samppart.Company database:
For example, if you replicate from all data sources connected to the Samppart.Company database, Essbase pulls the Budget, Actual, Variance, and Variance % members from the Sampeast.East database and updates them in the Samppart.Company database.
To update a replicated partition, use a tool:
The following considerations apply when partitioning in secure (SSL) mode:
The partition source and target must have the same security protocol; for example, both or neither use SSL.
To enable Essbase to use SSL connectivity, you must set ENABLESECUREMODE to TRUE.
Consider setting CLIENTPREFERREDMODE to SECURE.
If CLIENTPREFERREDMODE is not set, or is set to FALSE, but ENABLESECUREMODE is set to TRUE, you can securely create and refresh partitions in MaxL by adding :secure to the HOST-NAME string. For example,
login esbuser esbpassword on “localhost:6423:secure”;
Table 37. Troubleshooting Problems with Partitions
Moving a dimension past a dimension that is not in the partition may not get propagated to the target during outline synchronization. Also, moving a member past a member that is not in the partition may not get propagated.
Structure your outline so that members and dimensions are not moved across partitions. If doing so is not possible, change the target outline to reflect the source outline moved members or dimensions.