Tim Owen created SOLR-13029:
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Summary: Allow HDFS buffer size to be configured
Key: SOLR-13029
URL: https://issues.apache.org/jira/browse/SOLR-13029
Project: Solr
Issue Type: Improvement
Security Level: Public (Default Security Level. Issues are Public)
Components: Backup/Restore, hdfs
Affects Versions: 7.5, master (8.0)
Reporter: Tim Owen
There's a default hardcoded buffer size setting of 4096 in the HDFS code which
means in particular that restoring a backup from HDFS takes a long time.
Copying multi-GB files from HDFS using a buffer as small as 4096 bytes is very
inefficient. We changed this in our local build used in production to 256kB and
saw a 10x speed improvement when restoring a backup. Attached patch simply
makes this size configurable using a command line setting, much like several
other buffer size values.
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