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Posted to hdfs-dev@hadoop.apache.org by "Tsz Wo (Nicholas), SZE (JIRA)" <ji...@apache.org> on 2013/01/14 08:54:14 UTC
[jira] [Created] (HDFS-4397) Combined diff may not be identical to
the diffs applied sequentially
Tsz Wo (Nicholas), SZE created HDFS-4397:
--------------------------------------------
Summary: Combined diff may not be identical to the diffs applied sequentially
Key: HDFS-4397
URL: https://issues.apache.org/jira/browse/HDFS-4397
Project: Hadoop HDFS
Issue Type: Sub-task
Components: namenode
Reporter: Tsz Wo (Nicholas), SZE
Assignee: Tsz Wo (Nicholas), SZE
Let diffs
{noformat}
d(1,k) = m_1 + m_2 + ... + m_k;
d(k+1,n) = m_{k+1} + m_{k+2} + ... + m_n;
{noformat}
and
{noformat}
d(1,n) = m_1 + m_2 + ... + m_n,
{noformat}
where m_j denote modifications. Then, we may have
{noformat}
d(1,k) + d(k+1,n) != d(1,n).
{noformat}
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