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Posted to issues@orc.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2017/07/25 02:13:00 UTC
[jira] [Commented] (ORC-91) Use hdfs v-blocks instead of
zero-padding stripes
[ https://issues.apache.org/jira/browse/ORC-91?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16099397#comment-16099397 ]
Gopal V commented on ORC-91:
----------------------------
There's one release where using any HDFS only APIs will break ORC (2.7.3) - due to https://issues.apache.org/jira/browse/HADOOP-14132
> Use hdfs v-blocks instead of zero-padding stripes
> -------------------------------------------------
>
> Key: ORC-91
> URL: https://issues.apache.org/jira/browse/ORC-91
> Project: ORC
> Issue Type: Improvement
> Reporter: Gopal V
> Assignee: Gopal V
>
> HDFS-3689 added variable length blocks to HDFS as a core feature.
> hsync(SyncFlag.END_BLOCK)
> can now end an HDFS block on disk without padding it out with zeros.
> The current space wasted in ORC to padding is 5%.
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