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Posted to issues@hive.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2019/11/15 08:51:00 UTC
[jira] [Work logged] (HIVE-21146) Enforce TransactionBatch size=1
for blob stores
[ https://issues.apache.org/jira/browse/HIVE-21146?focusedWorklogId=344061&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-344061 ]
ASF GitHub Bot logged work on HIVE-21146:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 15/Nov/19 08:50
Start Date: 15/Nov/19 08:50
Worklog Time Spent: 10m
Work Description: dlavati commented on issue #797: HIVE-21146 Enforce TransactionBatch size=1 for blob stores
URL: https://github.com/apache/hive/pull/797#issuecomment-554269771
@t3rmin4t0r, @prasanthj is this something you could review please?
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Issue Time Tracking
-------------------
Worklog Id: (was: 344061)
Time Spent: 20m (was: 10m)
> Enforce TransactionBatch size=1 for blob stores
> -----------------------------------------------
>
> Key: HIVE-21146
> URL: https://issues.apache.org/jira/browse/HIVE-21146
> Project: Hive
> Issue Type: Bug
> Components: Streaming, Transactions
> Affects Versions: 3.0.0
> Reporter: Eugene Koifman
> Assignee: David Lavati
> Priority: Major
> Labels: pull-request-available
> Attachments: HIVE-21146.2.patch, HIVE-21146.2.patch, HIVE-21146.2.patch, HIVE-21146.patch
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Streaming Ingest API supports a concept of {{TransactionBatch}} where N transactions can be opened at once and the data in all of them will be written to the same delta_x_y directory where each transaction in the batch can be committed/aborted independently. The implementation relies on {{FSDataOutputStream.hflush()}} (called from OrcRecordUpdater}} which is available on HDFS but is often implemented as no-op in Blob store backed {{FileSystem}} objects.
> Need to add a check to {{HiveStreamingConnection()}} constructor to raise an error if {{builder.transactionBatchSize > 1}} and the target table/partitions are backed by something that doesn't support {{hflush()}}.
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