HBASE-8868. add metric to report client shortcircuit reads. #1334
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The test TestVerifyBucketCacheFile#testRetrieveFromFile fails consistently. However, it doesn't look like it was introduced by this patch. HBASE-23976 Nick reported the same issue. |
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Believe the test failure is due to HBASE-23829. |
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Signed-off-by: stack <[email protected]>
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Thanks Stack! |
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) Signed-off-by: stack <[email protected]> (cherry picked from commit 4ec1909) Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.java
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Signed-off-by: stack <[email protected]> (cherry picked from commit 4ec1909) Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.java
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branch-2.2 backport of #1334 Signed-off-by: stack <[email protected]> (cherry picked from commit 4ec1909) Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.java Signed-off-by: Sean Busbey <[email protected]>
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branch-1 backport of #1334 Signed-off-by: stack <[email protected]> Signed-off-by: Sean Busbey <[email protected]> Co-authored-by: Andrew Purtell <[email protected]>
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branch-1 backport of apache#1334 Signed-off-by: stack <[email protected]> Signed-off-by: Sean Busbey <[email protected]> Co-authored-by: Andrew Purtell <[email protected]>
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branch-2.2 backport of apache#1334 Signed-off-by: stack <[email protected]> (cherry picked from commit 4ec1909) Conflicts: hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/MetricsRegionServerWrapperImpl.java Signed-off-by: Sean Busbey <[email protected]> (cherry picked from commit 8a15e0b) Change-Id: I259f77f1fbec1725873bfac9dab944267851648d
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Expose file system level read metrics for RegionServer.
If the HBase RS runs on top of HDFS, calculate the aggregation of
ReadStatistics of each HdfsFileInputStream. These metrics include:
(1) total number of bytes read from HDFS.
(2) total number of bytes read from local DataNode.
(3) total number of bytes read locally through short-circuit read.
(4) total number of bytes read locally through zero-copy read.
Because HDFS ReadStatistics is calculated per input stream, it is not
feasible to update the aggregated number in real time. Instead, the
metrics are updated when an input stream is closed.