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https://issues.apache.org/jira/browse/BEAM-9650?focusedWorklogId=422340&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-422340
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ASF GitHub Bot logged work on BEAM-9650:
----------------------------------------
Author: ASF GitHub Bot
Created on: 14/Apr/20 21:32
Start Date: 14/Apr/20 21:32
Worklog Time Spent: 10m
Work Description: Ardagan commented on pull request #11415: [BEAM-9650]
Cleanup documentation on side inputs patterns
URL: https://github.com/apache/beam/pull/11415#discussion_r408448451
##########
File path: website/src/documentation/patterns/side-inputs.md
##########
@@ -50,25 +50,25 @@ For instance, the following code sample uses a `Map` to
create a `DoFn`. The `Ma
## Slowly updating side input using windowing
-You can read side input pcollection periodically into distinct windows.
-Later, when you apply side input to your main input, windows will be matched
automatically 1:1.
-This way, you can guarantee side input consistency on the duration of the
single window.
-
-To do this, you can utilize PeriodicSequence PTransform that will generate
infinite sequence
-of elements with some real-time period:
+You can read side input data periodically into distinct PCollection windows.
+Later, when you apply the side input to your main input, each main input
+window is automatically matched to a single side input window.
+This guarantees side input consistency on the duration of the single window,
+meaning that each window on main input side will be matched to a single
+version of side input data.
+
+To do this, you can utilize a combination of PeriodicSequence/PeriodicImpulse
+PTransforms that will generate infinite sequence of elements with some
real-time
+period and SDF Read operation or similar to read data into side input
+periodically:
1. Use the PeriodicImpulse transform to generate windowed periodic sequence.
- a. MAX_TIMESTAMP can be replaced with some closer boundary if you want to
stop generating elements at some point.
-
1. Read data using Read operation triggered by arrival of PCollection element.
1. Apply side input.
-```python
+```py
Review comment:
Seems that adding this snippet makes java snippet at L45 disappear from
served site despite me not changing anything in code above. Do you know if
there's some trick to make both snippets appear?
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Issue Time Tracking
-------------------
Worklog Id: (was: 422340)
Time Spent: 5h (was: 4h 50m)
> Add consistent slowly changing side inputs support
> --------------------------------------------------
>
> Key: BEAM-9650
> URL: https://issues.apache.org/jira/browse/BEAM-9650
> Project: Beam
> Issue Type: Bug
> Components: io-ideas
> Reporter: Mikhail Gryzykhin
> Assignee: Mikhail Gryzykhin
> Priority: Major
> Time Spent: 5h
> Remaining Estimate: 0h
>
> Add implementation for slowly changing dimentions based on [design
> doc](https://docs.google.com/document/d/1LDY_CtsOJ8Y_zNv1QtkP6AGFrtzkj1q5EW_gSChOIvg/edit]
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