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https://issues.apache.org/jira/browse/HDFS-14703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17346002#comment-17346002
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Renukaprasad C commented on HDFS-14703:
---------------------------------------
Thanks [~shv] & [~xinglin]
I have tested on 48 Core physical machine & could see significant performance
improvement with the patch.
On average improvement is around 30% with default storage policy.
Base Patch
ITR-1 56439 66622
ITR-2 58092 65074
ITR-3 60132 74354
ITR-4 52056 76522
ITR-5 55478 65526
ITR-6 60664 76881
AVG 56066 72976.33333
Improvement 30.16147636
Attached few results:
{code:java}
BASE:
common/hadoop-hdfs-32021-05-17 11:17:36,973 INFO
namenode.NNThroughputBenchmark: --- mkdirs inputs ---
2021-05-17 11:17:36,973 INFO namenode.NNThroughputBenchmark: nrDirs = 1000000
2021-05-17 11:17:36,973 INFO namenode.NNThroughputBenchmark: nrThreads = 200
2021-05-17 11:17:36,973 INFO namenode.NNThroughputBenchmark: nrDirsPerDir = 32
2021-05-17 11:17:36,973 INFO namenode.NNThroughputBenchmark: --- mkdirs stats
---
2021-05-17 11:17:36,973 INFO namenode.NNThroughputBenchmark: # operations:
1000000
2021-05-17 11:17:36,973 INFO namenode.NNThroughputBenchmark: Elapsed Time: 17718
2021-05-17 11:17:36,973 INFO namenode.NNThroughputBenchmark: Ops per sec:
56439.77875606727
2021-05-17 11:17:36,973 INFO namenode.NNThroughputBenchmark: Average Time: 3
2021-05-17 11:17:36,973 INFO namenode.FSEditLog: Ending log segment 1, 1031254
PATCH:
2021-05-17 11:11:09,321 INFO namenode.NNThroughputBenchmark: --- mkdirs inputs
---
2021-05-17 11:11:09,321 INFO namenode.NNThroughputBenchmark: nrDirs = 1000000
2021-05-17 11:11:09,321 INFO namenode.NNThroughputBenchmark: nrThreads = 200
2021-05-17 11:11:09,321 INFO namenode.NNThroughputBenchmark: nrDirsPerDir = 32
2021-05-17 11:11:09,321 INFO namenode.NNThroughputBenchmark: --- mkdirs stats
---
2021-05-17 11:11:09,321 INFO namenode.NNThroughputBenchmark: # operations:
1000000
2021-05-17 11:11:09,321 INFO namenode.NNThroughputBenchmark: Elapsed Time: 15010
2021-05-17 11:11:09,321 INFO namenode.NNThroughputBenchmark: Ops per sec:
66622.25183211193
2021-05-17 11:11:09,321 INFO namenode.NNThroughputBenchmark: Average Time: 2
2021-05-17 11:11:09,331 INFO namenode.FSEditLog: Ending log segment 1, 1031254
{code}
Command: ./hadoop jar
../share/hadoop/common/hadoop-hdfs-3.1.1-hw-ei-SNAPSHOT-tests.jar
org.apache.hadoop.hdfs.server.namenode.NNThroughputBenchmark -fs file:/// -op
mkdirs -threads 200 -dirs 1000000 -dirsPerDir 32
Hw configuration:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
CPU(s): 48
On-line CPU(s) list: 0-47
Thread(s) per core: 2
Core(s) per socket: 12
Socket(s): 2
NUMA node(s): 2
Vendor ID: GenuineIntel
CPU family: 6
Model: 63
Model name: Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz
Stepping: 2
CPU MHz: 2600.406
CPU max MHz: 3500.0000
CPU min MHz: 1200.0000
BogoMIPS: 5189.51
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 30720K
NUMA node0 CPU(s): 0-11,24-35
NUMA node1 CPU(s): 12-23,36-47
> NameNode Fine-Grained Locking via Metadata Partitioning
> -------------------------------------------------------
>
> Key: HDFS-14703
> URL: https://issues.apache.org/jira/browse/HDFS-14703
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs, namenode
> Reporter: Konstantin Shvachko
> Priority: Major
> Attachments: 001-partitioned-inodeMap-POC.tar.gz,
> 002-partitioned-inodeMap-POC.tar.gz, 003-partitioned-inodeMap-POC.tar.gz,
> NameNode Fine-Grained Locking.pdf, NameNode Fine-Grained Locking.pdf
>
>
> We target to enable fine-grained locking by splitting the in-memory namespace
> into multiple partitions each having a separate lock. Intended to improve
> performance of NameNode write operations.
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