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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-2889) Tool to look at HLogs -- parse and tail -f
Date Thu, 29 Jul 2010 03:52:15 GMT
Tool to look at HLogs -- parse and tail -f

                 Key: HBASE-2889
                 URL: https://issues.apache.org/jira/browse/HBASE-2889
             Project: HBase
          Issue Type: Bug
          Components: wal
            Reporter: stack
            Assignee: stack
             Fix For: 0.90.0

We need a tool for looking at wals.  A tail -f would be sweet though it might be ugly having
to open each time it wants to dump next lot of edits out wal log.

>From Kannan:

{code}20:45 <kannan> WALEdit already has a toString().
20:46 <kannan> And append/sync support allows you to read concurrently a file that is
being written too... (like JDs replication).
20:46 <kannan> So it would be good if I could do a bin/hbase hlogprint -f hdfs://...../.logs/<filename>
-v -p
20:46 <kannan> much like the HFile pretty printer... except the HLog one is effectively
a tail -f.

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