Hello, Ivan. > 1. How system views are going to be exposed? Is there any difference > in comparison to other metrics?
We have a `SystemViewExporterSpi`. Built-in implementations are `JmxSystemViewExporterSpi` and `SqlViewExporterSpi`. > 2. What should be done to adopt RunningQueryManager to SystemView API? I think we should replace `RunningQueryManager` with the special SystemView implementation. > what is the difference between metrics and system views? Actually, it's a very good question :) System view is a collection of internal Ignite objects exported to a user. Each system view is a table. Metric is a value representing some instantaneous state of the internal Ignite object. So its a "cell" of table. We need metrics to build charts and history of processes. We need system views to known what objects exist in node and its params. В Пт, 04/10/2019 в 11:51 +0300, Ivan Pavlukhin пишет: > Nikolay, > > I checked the IEP [1]. Now it is more clear for me about SystemView > API. Follow-up questions: > 1. How system views are going to be exposed? Is there any difference > in comparison to other metrics? > 2. What should be done to adopt RunningQueryManager to SystemView API? > > Also some bits for my understanding. I do not have a clear intuition > what is the difference between metrics and system views? For example, > how a system view is different from a metric holding a collection of > values? And why they were introduced as a separate class? > > [1] https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=112820392 > > чт, 3 окт. 2019 г. в 16:37, Nikolay Izhikov <nizhi...@apache.org>: > > > > Hello, Ivan. > > > > Thanks for feedback. > > > > Initial IEP [1] naming was changed during code review. > > I updated the IEP [1] with the current naming. > > > > Can you take a look and check is all clear now? > > > > [1] > > https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=112820392 > > > > В Ср, 02/10/2019 в 17:21 +0300, Ivan Pavlukhin пишет: > > > Hi Nikolay, > > > > > > Actually I do not fully understand what is SystemView API. I have not > > > found it in IEP [1] (I searched for words "system" and "view"). > > > > > > RunningQueryManager is a component responsible for tracking running > > > queries internally. This info is exposed to users as SQL view via > > > SqlSystemViewRunningQueries. In the same package you can find a plenty > > > of other SQL views. > > > > > > [1] > > > https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=112820392 > > > > > > вт, 1 окт. 2019 г. в 06:42, Nikolay Izhikov <nizhi...@apache.org>: > > > > > > > > Hello, Igniters. > > > > > > > > Since the last release `RunningQueryManager` [1] was added. > > > > It used to track a running query. > > > > > > > > In IEP-35 [2] SystemView API was added. > > > > SystemView API supposed to be used to track all kinds of internal > > > > Ignite objects. > > > > > > > > I think this RunningQueryManager should be replaced [3] with the more > > > > unified SystemView API. > > > > > > > > Any objections? > > > > > > > > [1] https://issues.apache.org/jira/browse/IGNITE-10754 > > > > [2] > > > > https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=112820392 > > > > [3] https://issues.apache.org/jira/browse/IGNITE-12223 > > > > [4] https://issues.apache.org/jira/browse/IGNITE-12224 > > > > > > > > > > > >
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