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Posted to commits@cassandra.apache.org by "Stu Hood (JIRA)" <ji...@apache.org> on 2011/07/18 21:41:58 UTC

[jira] [Created] (CASSANDRA-2916) Streaming estimatedKey calculation should never be 0

Streaming estimatedKey calculation should never be 0
----------------------------------------------------

                 Key: CASSANDRA-2916
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2916
             Project: Cassandra
          Issue Type: Bug
          Components: Core
            Reporter: Stu Hood
            Assignee: Stu Hood
            Priority: Minor
             Fix For: 1.0


The new in-streaming SSTable rebuild uses the sender's estimated key calculation to determine which codepath to take: in some cases, samples can result in an estimated key count of 0.

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[jira] [Updated] (CASSANDRA-2916) Streaming estimatedKey calculation should never be 0

Posted by "Stu Hood (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/CASSANDRA-2916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stu Hood updated CASSANDRA-2916:
--------------------------------

    Attachment: 0001-CASSANDRA-2916-Assume-at-least-one-estimated-key-for-s.txt

Path to ensure that we never estimate 0 keys for non-empty ranges. Also, properly handle the case where a range captures exactly one key.

> Streaming estimatedKey calculation should never be 0
> ----------------------------------------------------
>
>                 Key: CASSANDRA-2916
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2916
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Stu Hood
>            Assignee: Stu Hood
>            Priority: Minor
>             Fix For: 1.0
>
>         Attachments: 0001-CASSANDRA-2916-Assume-at-least-one-estimated-key-for-s.txt
>
>
> The new in-streaming SSTable rebuild uses the sender's estimated key calculation to determine which codepath to take: in some cases, samples can result in an estimated key count of 0.

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[jira] [Updated] (CASSANDRA-2916) Streaming estimatedKey calculation should never be 0

Posted by "Jonathan Ellis (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/CASSANDRA-2916?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis updated CASSANDRA-2916:
--------------------------------------

    Affects Version/s: 1.0

> Streaming estimatedKey calculation should never be 0
> ----------------------------------------------------
>
>                 Key: CASSANDRA-2916
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2916
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.0
>            Reporter: Stu Hood
>            Assignee: Stu Hood
>            Priority: Minor
>             Fix For: 1.0
>
>         Attachments: 0001-CASSANDRA-2916-Assume-at-least-one-estimated-key-for-s.txt
>
>
> The new in-streaming SSTable rebuild uses the sender's estimated key calculation to determine which codepath to take: in some cases, samples can result in an estimated key count of 0.

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[jira] [Commented] (CASSANDRA-2916) Streaming estimatedKey calculation should never be 0

Posted by "Hudson (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/CASSANDRA-2916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13067274#comment-13067274 ] 

Hudson commented on CASSANDRA-2916:
-----------------------------------

Integrated in Cassandra #960 (See [https://builds.apache.org/job/Cassandra/960/])
    ensure that we never estimate 0 keys when streaming non-empty ranges
patch by Stu Hood; reviewed by jbellis for CASSANDRA-2916

jbellis : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1148029
Files : 
* /cassandra/trunk/test/unit/org/apache/cassandra/streaming/StreamingTransferTest.java
* /cassandra/trunk/src/java/org/apache/cassandra/io/sstable/SSTableReader.java
* /cassandra/trunk/src/java/org/apache/cassandra/streaming/IncomingStreamReader.java


> Streaming estimatedKey calculation should never be 0
> ----------------------------------------------------
>
>                 Key: CASSANDRA-2916
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2916
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.0
>            Reporter: Stu Hood
>            Assignee: Stu Hood
>            Priority: Minor
>             Fix For: 1.0
>
>         Attachments: 0001-CASSANDRA-2916-Assume-at-least-one-estimated-key-for-s.txt
>
>
> The new in-streaming SSTable rebuild uses the sender's estimated key calculation to determine which codepath to take: in some cases, samples can result in an estimated key count of 0.

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[jira] [Issue Comment Edited] (CASSANDRA-2916) Streaming estimatedKey calculation should never be 0

Posted by "Stu Hood (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/CASSANDRA-2916?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13067238#comment-13067238 ] 

Stu Hood edited comment on CASSANDRA-2916 at 7/18/11 7:44 PM:
--------------------------------------------------------------

Patch to ensure that we never estimate 0 keys for non-empty ranges. Also, properly handle the case where a range captures exactly one key.

      was (Author: stuhood):
    Path to ensure that we never estimate 0 keys for non-empty ranges. Also, properly handle the case where a range captures exactly one key.
  
> Streaming estimatedKey calculation should never be 0
> ----------------------------------------------------
>
>                 Key: CASSANDRA-2916
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-2916
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Stu Hood
>            Assignee: Stu Hood
>            Priority: Minor
>             Fix For: 1.0
>
>         Attachments: 0001-CASSANDRA-2916-Assume-at-least-one-estimated-key-for-s.txt
>
>
> The new in-streaming SSTable rebuild uses the sender's estimated key calculation to determine which codepath to take: in some cases, samples can result in an estimated key count of 0.

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