[
https://issues.apache.org/jira/browse/HADOOP-3961?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ari Rabkin updated HADOOP-3961:
-------------------------------
Attachment: resourceEstFix.patch
Remove old initial estimate; instead, disk space estimation only kicks in after
10% of maps have finished.
> resource estimation works badly in some cases
> ---------------------------------------------
>
> Key: HADOOP-3961
> URL: https://issues.apache.org/jira/browse/HADOOP-3961
> Project: Hadoop Core
> Issue Type: Bug
> Reporter: Ari Rabkin
> Assignee: Ari Rabkin
> Priority: Blocker
> Attachments: resourceEstFix.patch
>
>
> The disk space estimation introduced in HADOOP-657 performs badly under some
> circumstances. In particular, if maps have very small output, the initial
> estimate of output size equals input size throws everything off.
> Fix is to use a smaller initial estimate, and to update it appropriately.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
