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From echeipesh <...@git.apache.org>
Subject [GitHub] accumulo pull request: ACCUMULO-3602 BatchScanner optimization for...
Date Fri, 17 Apr 2015 14:18:23 GMT
Github user echeipesh commented on a diff in the pull request:

    https://github.com/apache/accumulo/pull/25#discussion_r28597474
  
    --- Diff: core/src/main/java/org/apache/accumulo/core/client/mapred/AbstractInputFormat.java
---
    @@ -629,32 +676,37 @@ public float getProgress() throws IOException {
             }
             for (Map.Entry<KeyExtent,List<Range>> extentRanges : tserverBin.getValue().entrySet())
{
               Range ke = extentRanges.getKey().toDataRange();
    -          for (Range r : extentRanges.getValue()) {
    -            if (autoAdjust) {
    -              // divide ranges into smaller ranges, based on the tablets
    -              RangeInputSplit split = new RangeInputSplit(tableName, tableId, ke.clip(r),
new String[] {location});
    -
    -              split.setOffline(tableConfig.isOfflineScan());
    -              split.setIsolatedScan(tableConfig.shouldUseIsolatedScanners());
    -              split.setUsesLocalIterators(tableConfig.shouldUseLocalIterators());
    -              split.setMockInstance(mockInstance);
    -              split.setFetchedColumns(tableConfig.getFetchedColumns());
    -              split.setPrincipal(principal);
    -              split.setToken(token);
    -              split.setInstanceName(instance.getInstanceName());
    -              split.setZooKeepers(instance.getZooKeepers());
    -              split.setAuths(auths);
    -              split.setIterators(tableConfig.getIterators());
    -              split.setLogLevel(logLevel);
    -
    -              splits.add(split);
    -            } else {
    -              // don't divide ranges
    -              ArrayList<String> locations = splitsToAdd.get(r);
    -              if (locations == null)
    -                locations = new ArrayList<String>(1);
    -              locations.add(location);
    -              splitsToAdd.put(r, locations);
    +          if (batchScan) {
    +            // group ranges by tablet to be read by a BatchScanner
    +            ArrayList<Range> clippedRanges = new ArrayList<Range>();
    +            for(Range r: extentRanges.getValue())
    --- End diff --
    
    Actually Auto-adjust is on by default, which would cause an exception as soon as batch
scan is turned on. Should it be downgraded to a warning, since interaction between auto-adjust
and batch scan is a "soft" change in the behavior?


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