Search for	Example	Results
A single word	`cat`	Topics that contain the word "cat". You will also find its grammatical variations, such as "cats".
A phrase. You can specify that the search results contain a specific phrase.	`"cat food"` (quotation marks)	Topics that contain the literal phrase "cat food" and all its grammatical variations. Without the quotation marks, the query is equivalent to specifying an OR operator, which finds topics with one of the individual words instead of the phrase.

Search for	Operator	Example
Two or more words in the same topic	`AND` `and` `+` (plus symbol) `&` (ampersand)	`cat AND dog` `"cat food"+milk` `"cat food"&"dog food"`
Either word in a topic	`OR` `or` `\|` (pipe)	`cat OR dog` `cat \| dog`
Topics that do not contain a specific word or phrase	`NOT` `not` `!` (exclamation point)	`NOT cat` `! dog`
Topics that contain one string and do not contain another	`^` (caret)	`cat ^ mouse`
A combination of search types	`( )` parentheses	`cat + (dog \| mouse)` `cat \| dog + (! mouse)`

Configuration Management System (CMS)2018.05

Use > Data Flow Management > Reconciliation > Data Reconciliation > Data-In Service - Populating UCMDB

Data-In Service - Populating UCMDB

After the Identification service runs, the identified data is merged and inserted into the UCMDB by the Data-In service. When the CI is created, a stable ID is generated. The stable ID remains the same when the name, attribute name, or property values (during normalization) change.

Multiple CI Matching

One of the major problems that the Data-In service solves is deciding what to do if the input CI matches multiple UCMDB CIs.

To make this decision, the Data-In service uses match criteria.

The process is as follows:

Input CIs are merged with each matching UCMDB CI.
For each pair of CIs resulting from this merge, match (verification and validation) criteria are run.
- If at least one pair does not pass the match criteria check, the CIs are not merged, and the Data-In service ignores the input CI.
- If all pairs pass the match criteria check, the CIs are merged.
  
  Note The CIs are merged by the Merge service.

For examples of multiple CI matching, see:

Multithreaded Data-In Service

Starting from UCMDB 10.30, the Data-In service is multithreaded and is capable to scale the speed of inserting data into UCMDB by adjusting the number of allocated threads.

Note By default, the Data-In service uses four allocated threads. For more information about how to adjust the allocated threads of the Data-In service, see How to Modify the Maximum Number of Threads for the Data-In Service.

In previous versions of UCMDB, the Data-In service uses a serial architecture and processes the arriving CIs and their updates in a controlled single-threaded approach. This architecture guarantees the data model consistency but is less efficient.

The multithreaded Data-In service concurrently processes multiple CI buckets on multiprocessor or multi-core systems if these buckets do not carry overlapping CIs.

To guarantee the data model consistency, the multithreaded Data-In service processes the CI buckets that carry the same CI information sequentially. In this situation, the multithreaded architecture does not improve the performance of the Data-In service.

With the multithreaded Data-In service, it is recommended that you consider the following approaches, which can eventually speed up the running jobs and ease the management of UCMDB Data-In:

Break UCMDB integrations into non-overlapping CI domains
Set up discovery on different or unrelated CI domains

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