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https://issues.apache.org/jira/browse/HBASE-15560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15528830#comment-15528830
]
Hadoop QA commented on HBASE-15560:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 15s
{color} | {color:blue} Docker mode activated. {color} |
| {color:green}+1{color} | {color:green} @author {color} | {color:green} 0m 0s
{color} | {color:green} The patch does not contain any @author tags. {color} |
| {color:green}+1{color} | {color:green} test4tests {color} | {color:green} 0m
0s {color} | {color:green} The patch appears to include 5 new or modified test
files. {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 17s
{color} | {color:blue} Maven dependency ordering for branch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 2m
54s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 3m 22s
{color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
28s {color} | {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 1m
35s {color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 0m 0s
{color} | {color:blue} Skipped patched modules with no Java source:
hbase-resource-bundle . {color} |
| {color:red}-1{color} | {color:red} findbugs {color} | {color:red} 0m 34s
{color} | {color:red} hbase-common in master has 1 extant Findbugs warnings.
{color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 29s
{color} | {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} mvndep {color} | {color:blue} 0m 7s
{color} | {color:blue} Maven dependency ordering for patch {color} |
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green} 3m
59s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green} 3m 18s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green} 3m 18s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green} 0m
28s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} mvneclipse {color} | {color:green} 1m
35s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green} 0m
0s {color} | {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} xml {color} | {color:green} 0m 5s
{color} | {color:green} The patch has no ill-formed XML file. {color} |
| {color:green}+1{color} | {color:green} hadoopcheck {color} | {color:green}
25m 43s {color} | {color:green} Patch does not cause any errors with Hadoop
2.4.0 2.4.1 2.5.0 2.5.1 2.5.2 2.6.1 2.6.2 2.6.3 2.7.1. {color} |
| {color:green}+1{color} | {color:green} hbaseprotoc {color} | {color:green} 1m
37s {color} | {color:green} the patch passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue} 0m 0s
{color} | {color:blue} Skipped patched modules with no Java source:
hbase-resource-bundle . {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green} 2m
39s {color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green} 2m 39s
{color} | {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 0m 6s
{color} | {color:green} hbase-resource-bundle in the patch passed. {color} |
| {color:green}+1{color} | {color:green} unit {color} | {color:green} 1m 43s
{color} | {color:green} hbase-common in the patch passed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 81m 20s {color}
| {color:red} hbase-server in the patch failed. {color} |
| {color:red}-1{color} | {color:red} unit {color} | {color:red} 92m 57s {color}
| {color:red} root in the patch failed. {color} |
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green} 0m
51s {color} | {color:green} The patch does not generate ASF License warnings.
{color} |
| {color:black}{color} | {color:black} {color} | {color:black} 233m 18s {color}
| {color:black} {color} |
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|| Reason || Tests ||
| Timed out junit tests | org.apache.hadoop.hbase.client.TestFromClientSide |
| |
org.apache.hadoop.hbase.client.TestRestoreSnapshotFromClientWithRegionReplicas |
| | org.apache.hadoop.hbase.client.TestMobCloneSnapshotFromClient |
| | org.apache.hadoop.hbase.client.TestMobSnapshotCloneIndependence |
| | org.apache.hadoop.hbase.client.TestAdmin2 |
| | org.apache.hadoop.hbase.client.TestHCM |
| | org.apache.hadoop.hbase.client.TestSnapshotFromClientWithRegionReplicas |
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|| Subsystem || Report/Notes ||
| Docker | Client=1.11.2 Server=1.11.2 Image:yetus/hbase:7bda515 |
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12830624/HBASE-15560.patch |
| JIRA Issue | HBASE-15560 |
| Optional Tests | asflicense javac javadoc unit findbugs hadoopcheck
hbaseanti checkstyle compile xml |
| uname | Linux 4eb6ba4f664d 3.13.0-92-generic #139-Ubuntu SMP Tue Jun 28
20:42:26 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux |
| Build tool | maven |
| Personality |
/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/component/dev-support/hbase-personality.sh
|
| git revision | master / de7316b |
| Default Java | 1.8.0_101 |
| findbugs | v3.0.0 |
| findbugs |
https://builds.apache.org/job/PreCommit-HBASE-Build/3748/artifact/patchprocess/branch-findbugs-hbase-common-warnings.html
|
| unit |
https://builds.apache.org/job/PreCommit-HBASE-Build/3748/artifact/patchprocess/patch-unit-hbase-server.txt
|
| unit |
https://builds.apache.org/job/PreCommit-HBASE-Build/3748/artifact/patchprocess/patch-unit-root.txt
|
| unit test logs |
https://builds.apache.org/job/PreCommit-HBASE-Build/3748/artifact/patchprocess/patch-unit-hbase-server.txt
https://builds.apache.org/job/PreCommit-HBASE-Build/3748/artifact/patchprocess/patch-unit-root.txt
|
| Test Results |
https://builds.apache.org/job/PreCommit-HBASE-Build/3748/testReport/ |
| modules | C: hbase-resource-bundle hbase-common hbase-server . U: . |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/3748/console |
| Powered by | Apache Yetus 0.3.0 http://yetus.apache.org |
This message was automatically generated.
> TinyLFU-based BlockCache
> ------------------------
>
> Key: HBASE-15560
> URL: https://issues.apache.org/jira/browse/HBASE-15560
> Project: HBase
> Issue Type: Improvement
> Components: BlockCache
> Affects Versions: 2.0.0
> Reporter: Ben Manes
> Assignee: Ben Manes
> Attachments: HBASE-15560.patch, HBASE-15560.patch, HBASE-15560.patch,
> HBASE-15560.patch, HBASE-15560.patch, tinylfu.patch
>
>
> LruBlockCache uses the Segmented LRU (SLRU) policy to capture frequency and
> recency of the working set. It achieves concurrency by using an O( n )
> background thread to prioritize the entries and evict. Accessing an entry is
> O(1) by a hash table lookup, recording its logical access time, and setting a
> frequency flag. A write is performed in O(1) time by updating the hash table
> and triggering an async eviction thread. This provides ideal concurrency and
> minimizes the latencies by penalizing the thread instead of the caller.
> However the policy does not age the frequencies and may not be resilient to
> various workload patterns.
> W-TinyLFU ([research paper|http://arxiv.org/pdf/1512.00727.pdf]) records the
> frequency in a counting sketch, ages periodically by halving the counters,
> and orders entries by SLRU. An entry is discarded by comparing the frequency
> of the new arrival (candidate) to the SLRU's victim, and keeping the one with
> the highest frequency. This allows the operations to be performed in O(1)
> time and, though the use of a compact sketch, a much larger history is
> retained beyond the current working set. In a variety of real world traces
> the policy had [near optimal hit
> rates|https://github.com/ben-manes/caffeine/wiki/Efficiency].
> Concurrency is achieved by buffering and replaying the operations, similar to
> a write-ahead log. A read is recorded into a striped ring buffer and writes
> to a queue. The operations are applied in batches under a try-lock by an
> asynchronous thread, thereby track the usage pattern without incurring high
> latencies
> ([benchmarks|https://github.com/ben-manes/caffeine/wiki/Benchmarks#server-class]).
> In YCSB benchmarks the results were inconclusive. For a large cache (99% hit
> rates) the two caches have near identical throughput and latencies with
> LruBlockCache narrowly winning. At medium and small caches, TinyLFU had a
> 1-4% hit rate improvement and therefore lower latencies. The lack luster
> result is because a synthetic Zipfian distribution is used, which SLRU
> performs optimally. In a more varied, real-world workload we'd expect to see
> improvements by being able to make smarter predictions.
> The provided patch implements BlockCache using the
> [Caffeine|https://github.com/ben-manes/caffeine] caching library (see
> HighScalability
> [article|http://highscalability.com/blog/2016/1/25/design-of-a-modern-cache.html]).
> Edward Bortnikov and Eshcar Hillel have graciously provided guidance for
> evaluating this patch ([github
> branch|https://github.com/ben-manes/hbase/tree/tinylfu]).
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