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Jeff Hammerbacher commented on HBASE-2889: ------------------------------------------ FWIW, if the WAL were serialized as Avro records, tools in many languages would be available for looking at the logs. There may be other drawbacks, of course. > 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 > > Attachments: 2889.txt > > > 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. > {code} -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.