Hello, Ivan. I had a talk about internals of Spark integration in Ignite. It answers on question why we should use Spark internals.
You can take a look at my meetup talk(in Russian) [1] or read an article if you prefer text [2]. [1] https://www.youtube.com/watch?v=CzbAweNKEVY [2] https://habr.com/ru/company/sberbank/blog/427297/ В Пн, 30/09/2019 в 20:29 +0300, Alexey Zinoviev пишет: > Yes, as I understand it uses Spark internals from the first commit))) > The reason - we take Spark SQL query execution plan and try to execute it > on Ignite cluster > Also we inherit a lot of Developer API related classes that could be > unstable. Spark has no good point for extension and this is a reason why we > should go deeper > > пн, 30 сент. 2019 г. в 20:17, Ivan Pavlukhin <vololo...@gmail.com>: > > > Hi Alexey, > > > > As an external watcher very far from Ignite Spark integration I would > > like to ask a humble question for my understanding. Why this > > integration uses Spark internals? Is it a common approach for > > integrating with Spark? > > > > пн, 30 сент. 2019 г. в 16:17, Alexey Zinoviev <zaleslaw....@gmail.com>: > > > > > > Hi, Igniters > > > I've started the work on the Spark 2.4 support > > > > > > We started the discussion here, in > > > https://issues.apache.org/jira/browse/IGNITE-12054 > > > > > > The Spark internals were totally refactored between 2.3 and 2.4 versions, > > > main changes touches > > > > > > - External catalog and listeners refactoring > > > - Changes of HAVING operator semantic support > > > - Push-down NULL filters generation in JOIN plans > > > - minor changes in Plan Generation that should be adopted in our > > > integration module > > > > > > I propose the initial solution here via creation of new module spark-2.4 > > > here https://issues.apache.org/jira/browse/IGNITE-12247 and addition of > > > > new > > > profile spark-2.4 (to avoid possible clashes with another spark versions) > > > > > > Also I've transformed ticket to an Umbrella ticket and created a few > > > tickets for muted tests (around 7 from 211 tests are muted now) > > > > > > Please, if somebody interested in it, make an initial review of modular > > > ignite structure and changes (without deep diving into Spark code). > > > > > > And yes, the proposed code is a copy-paste of spark-ignite module with a > > > few fixes > > > > > > > > -- > > Best regards, > > Ivan Pavlukhin > >
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