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https://issues.apache.org/jira/browse/BEAM-6120?focusedWorklogId=169727&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-169727
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ASF GitHub Bot logged work on BEAM-6120:
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Author: ASF GitHub Bot
Created on: 27/Nov/18 11:02
Start Date: 27/Nov/18 11:02
Worklog Time Spent: 10m
Work Description: robertwb commented on a change in pull request #7127:
[BEAM-6120] Support retrieval of large gbk iterables over the state API.
URL: https://github.com/apache/beam/pull/7127#discussion_r236614345
##########
File path: model/pipeline/src/main/proto/beam_runner_api.proto
##########
@@ -588,6 +588,10 @@ message StandardCoders {
// of the element
// Components: The element coder and the window coder, in that order
WINDOWED_VALUE = 8 [(beam_urn) = "beam:coder:windowed_value:v1"];
+
+ // Encodes an iterable of elements, some of which may be stored in state.
+ // Components: Coder for a single element.
+ STATE_BACKED_ITERABLE = 9 [(beam_urn) =
"beam:coder:state_backed_iterable:v1"];
Review comment:
While such a coder may be useful, I don't think that's what we want in this
particular case as we want to explicitly let the iterable be lazily read (and
written, if it's indeed written rather than just a pointer, say to some shuffle
position, stored). The standard iterable coder (as with all other coders) must
consume its input to advance the stream to the end of its encoded bytes, which
makes it impossible to achieve this kind of composition.
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Issue Time Tracking
-------------------
Worklog Id: (was: 169727)
Time Spent: 50m (was: 40m)
> Support retrieval of large gbk iterables over the state API.
> ------------------------------------------------------------
>
> Key: BEAM-6120
> URL: https://issues.apache.org/jira/browse/BEAM-6120
> Project: Beam
> Issue Type: Improvement
> Components: sdk-py-harness
> Reporter: Robert Bradshaw
> Assignee: Robert Bradshaw
> Priority: Major
> Time Spent: 50m
> Remaining Estimate: 0h
>
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