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From "Chengbing Liu (JIRA)" <>
Subject [jira] [Commented] (ATLAS-2816) Allow ignoring relationship in EntityGraphRetriever for FullTextMapperV2
Date Fri, 10 Aug 2018 06:57:00 GMT


Chengbing Liu commented on ATLAS-2816:

Thanks [~apoorvnaik] for review! Uploaded a new patch.

> Allow ignoring relationship in EntityGraphRetriever for FullTextMapperV2
> ------------------------------------------------------------------------
>                 Key: ATLAS-2816
>                 URL:
>             Project: Atlas
>          Issue Type: Bug
>    Affects Versions: 1.0.0
>            Reporter: Chengbing Liu
>            Assignee: Apoorv Naik
>            Priority: Major
>         Attachments: ATLAS-2816.01.patch, ATLAS-2816.02.patch
> We encountered a problem when using Hive bridge in production. One database has 5000+
tables. Importing the first table costs only tens of milliseconds, and then it becomes slower
with more tables. In the end, it costs 1~2 seconds to import one table.
> After investigation, we realized that it is not necessary for the {{FullTextMapperV2}}
to retrieve all the relationship of the database each time a table is imported. The time complexity
of importing a whole database actually goes to O(n^2) (n is number of tables).
> We propose to add a parameter to the constructor of {{EntityGraphRetriever}}: {{ignoreRelationship}}.
When set to true, {{mapVertexToAtlasEntity}} will skip the {{mapRelationshipAttributes}} call.
Since {{FullTextMapperV2}} will not use relationship attributes of the entity, this can save
plenty of time when importing entities with a large number of relations.

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