hadoop-hdfs-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Todd Lipcon (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-3216) DatanodeID should support multiple IP addresses
Date Mon, 09 Apr 2012 21:13:16 GMT

    [ https://issues.apache.org/jira/browse/HDFS-3216?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13250181#comment-13250181
] 

Todd Lipcon commented on HDFS-3216:
-----------------------------------

bq. #2 Yes, when reading/writing DatanodeInfos to/from streams (same as before when creating
a DatanodeID w/o a name)

When do we read/write DatanodeInfo from streams, now that we are pb-ified? i.e is the writable
interface even used anymore?

----
{code}
+   * Return the canonical IP address for this DatanodeID. Not all uses
+   * of DatanodeID are multi-IP aware, or would multiple IPs, therefore
+   * we use the first address as the canonical one.
{code}
ENOTASENTENCE

----
bq. #1 We still need the notion of canonical IP, mostly for cases that don't care about multiple
IP addresses. Updated the javadoc.

How is it ensured that the "canonical" IP is kept consistent across DN restarts, for example?
It's just whichever one is listed first in the DN-side configuration?

bq. Fixed the cast, now casts to String and serializes/deserializes the IPs, the test does
check this (was failing now passes).

That's a little strange, to serialize it into a comma-separated list inside JSON. It's not
possible to get Jackson to serialize it as a proper JSON array? Perhaps using a List<String>
inside the map?
                
> DatanodeID should support multiple IP addresses
> -----------------------------------------------
>
>                 Key: HDFS-3216
>                 URL: https://issues.apache.org/jira/browse/HDFS-3216
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>            Reporter: Eli Collins
>            Assignee: Eli Collins
>         Attachments: hdfs-3216.txt, hdfs-3216.txt
>
>
> The DatanodeID has a single field for the IP address, for HDFS-3146 we need to extend
it to support multiple addresses.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message