![]() functionality to run within sub-second timeframe which generates huge value addition to our customers when using SAP software to run their critical business scenariosĭevelopers who wish to develop new OData can easily run performance tests on their local Env to validate prior to pushing it into new/existing development or publishing it to SAP API Hub. We continuously thrive to optimize Fiori applications/. ![]() SAP Fiori Apps are based on OData Services, One SAP Fiori application shall have one dedicated OData Service. ![]() You can find an example in SAP Note 1890049.Ī changeset containing operations for different system aliases will be terminated with error text “ Changeset containing different system aliases not supported“. They are collected and sent to the backend defined by the system alias and via one RFC. All operations of a changeset must be defined for one and the same system alias (SAP_Origin=). In the context of multiple origin composition, not only retrieve operations such as read entity, read entityset but now also changesets are supported. Thus a service can be made available for several system aliases. Multiple Origin Composition (MOC) is the ability to collect data from different backend systems, aggregate them in one single service and updating different backend systems while using the same user. SPRO -> SAP Reference IMG -> SAP NetWeaver -> Gateway Service Enablement -> Backend OData Channel -> Configuration Settings -> Define Parallelization of Batch Queries.Ĭhangesets in Multiple Origin CompositionĬhangeset is a collection of one or more modifying operations having the feature “all or nothing” when processing (same meaning as Logical-Unit-of-Work in an ABAP system). 1 changeset with create, update and execute actionįrom within a backend system you can use the SAP project reference object (transaction SPRO) to activate or deactivate the parallelization as follows:.The following performance trace summary shows the performance statistics and also illustrates how a $batch request is processed in the backend system. The processing performance increases with more number of consecutive retrieve operations in a $batch request. The parallelization is active per default. Based on the configuration settings in the backend system (via IMG, transaction SPRO see below), all consecutive retrieve operations are parallelized to improve the processing performance. Due to the till now implementation of the etag handling in the REST/OData library and gateway framework, all modifying operations using etag in a batch request are delivered separately to the backend system. In the newer support package stacks described above only one RFC is used to send all operations contained in a batch request to the backend system (batch at once). In older support package stacks, the SAP NetWeaver Gateway framework issues one separate Remote Function Call (RFC) for each retrieve operation or each change set. The performance optimizations for $batch processing described here are only available for a hub system NW release 7.0x or 7.3x SP08 or NW release 7.4x SP06 and backend system NW release 7.0x or 7.3x SP08 or NW release 7.4x SP06. Performance Improvement: $batch Parallelization (tx_chat) web/models/room.ex:19: blog will walk you through the concept of So I did (after aliasing): iex(4)> c = Room.changeset(%Room, ) I then thought, I'd try to pass an empty struct to the changeset and see the error it produced. Many_to_many :members,, join_through: "rooms_users" # One user can create any number of roomsīelongs_to :created_by, # Foreign key indicating which user created this room I have the following model (for a chat room) which I'm having problem with while using changesets: defmodule do
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