Ted Yu created HBASE-19478:
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Summary: Utilize multi-get to speed up WAL file checking in
BackupLogCleaner
Key: HBASE-19478
URL: https://issues.apache.org/jira/browse/HBASE-19478
Project: HBase
Issue Type: Improvement
Reporter: Ted Yu
Currently BackupLogCleaner#getDeletableFiles() issues one Get per WAL file:
{code}
for (FileStatus file : files) {
String wal = file.getPath().toString();
boolean logInSystemTable = table.isWALFileDeletable(wal);
{code}
This is rather inefficient considering the number of WAL files in production
can get quite large.
We should use multi-get to reduce the number of calls to backup table (which
normally resides on another server).
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