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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-8120) Erasure coding: created util class to analyze striped block groups
Date Tue, 14 Apr 2015 06:43:14 GMT

     [ https://issues.apache.org/jira/browse/HDFS-8120?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Zhe Zhang updated HDFS-8120:
----------------------------
    Attachment: HDFS-8120.003.patch

Thanks Jing for the comment on {{BlockManager}}. The 003 patch makes the suggested change.
I will add a new unit test in the next rev.

Also thanks for [~libo-intel]'s suggestion. I changed the variable name. I also tried updating
the {{writeParityCellsForLastStripe}} logic to use the new {{getInternalBlockLength}} method
to calculate the size of last parity cell, but it caused test failures. You can look at the
commented code in the method to find how I tried. Could you take a look and suggest how to
update it? I think we should make the calculation consistent with the util class. Thanks!

> Erasure coding: created util class to analyze striped block groups
> ------------------------------------------------------------------
>
>                 Key: HDFS-8120
>                 URL: https://issues.apache.org/jira/browse/HDFS-8120
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Zhe Zhang
>            Assignee: Zhe Zhang
>         Attachments: HDFS-8120.000.patch, HDFS-8120.001.patch, HDFS-8120.002.patch, HDFS-8120.003.patch
>
>
> The patch adds logic of calculating size of individual blocks in a striped block group.



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