Sandhya Sundaresan created TRAFODION-2950:
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Summary: LOB:External LOB implementation should allow for mergin
external files
Key: TRAFODION-2950
URL: https://issues.apache.org/jira/browse/TRAFODION-2950
Project: Apache Trafodion
Issue Type: Improvement
Components: sql-exe
Affects Versions: any
Reporter: Sandhya Sundaresan
Assignee: Sandhya Sundaresan
Today each lobHandle of an external file *__* points to a unique HDFS file.
This causes the Namenode to run out of space to hold thousands of files. So we
could provide a utility to merge the external lob files into one larger HDFS
file ( belonging to a LOB column ) and readjust the entries in the LOB
descriptor metadata tables to now contain one *__* HDFS file and pointers to
offsets within that file rather than separate files.
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