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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-12116) Hot contention spots; writing
Date Wed, 01 Oct 2014 05:58:34 GMT

    [ https://issues.apache.org/jira/browse/HBASE-12116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14154407#comment-14154407
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Anoop Sam John commented on HBASE-12116:
----------------------------------------

As we work with TRT here Stack
{code}
/**
   * Update the current TimestampRange to include the timestamp from Key.
   * If the Key is of type DeleteColumn or DeleteFamily, it includes the
   * entire time range from 0 to timestamp of the key.
   * @param key
   */
  public void includeTimestamp(final byte[] key) {
    includeTimestamp(Bytes.toLong(key,key.length-KeyValue.TIMESTAMP_TYPE_SIZE));
    int type = key[key.length - 1];
    if (type == Type.DeleteColumn.getCode() ||
        type == Type.DeleteFamily.getCode()) {
      includeTimestamp(0);
    }
  }
{code}
This above can be removed. This is not used by any one and it expects the KV style key format.


> Hot contention spots; writing
> -----------------------------
>
>                 Key: HBASE-12116
>                 URL: https://issues.apache.org/jira/browse/HBASE-12116
>             Project: HBase
>          Issue Type: Bug
>            Reporter: stack
>            Assignee: stack
>         Attachments: 12116.checkForReplicas.txt, 12116.stringify.and.cache.scanner.maxsize.txt,
12116.txt, Screen Shot 2014-09-29 at 5.12.51 PM.png, Screen Shot 2014-09-30 at 10.39.34 PM.png
>
>
> Playing with flight recorder, here are some write-time contentious synchronizations/locks
(picture coming)



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