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From "Nico Kruber (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-7310) always use HybridMemorySegment
Date Mon, 31 Jul 2017 14:19:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-7310?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Nico Kruber updated FLINK-7310:
-------------------------------
    Issue Type: Sub-task  (was: Improvement)
        Parent: FLINK-7315

> always use HybridMemorySegment
> ------------------------------
>
>                 Key: FLINK-7310
>                 URL: https://issues.apache.org/jira/browse/FLINK-7310
>             Project: Flink
>          Issue Type: Sub-task
>          Components: Core
>    Affects Versions: 1.4.0
>            Reporter: Nico Kruber
>            Assignee: Nico Kruber
>
> For future changes to the network buffers (sending our own off-heap buffers through to
netty), we cannot use {{HeapMemorySegment}} anymore and need to rely on {{HybridMemorySegment}}
instead.
> We should thus drop any code that loads the {{HeapMemorySegment}} (it is still available
if needed) in favour of the {{HybridMemorySegment}} which is able to work on both heap and
off-heap memory.
> FYI: For the performance penalty of this change compared to using {{HeapMemorySegment}}
alone, see this interesting blob article (from 2015):
> https://flink.apache.org/news/2015/09/16/off-heap-memory.html



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