[
https://issues.apache.org/jira/browse/KAFKA-4971?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15955260#comment-15955260
]
Michal Borowiecki commented on KAFKA-4971:
------------------------------------------
I'd venture a guess that you are limited by something else than your hdd/ssd
performance.
Is 1g your total memory in the VM? How much of it is allocated to the kafka jvm
process?
Some things I can think of:
Is there a lot of activity in the gc.log?
Is the OS not swapping ferociously due to over-allocation of memory by any
chance?
Hope that helps.
> Why is there no difference between kafka benchmark tests on SSD and HDD?
> -------------------------------------------------------------------------
>
> Key: KAFKA-4971
> URL: https://issues.apache.org/jira/browse/KAFKA-4971
> Project: Kafka
> Issue Type: Test
> Affects Versions: 0.10.0.0
> Environment: Oracle VM VirtualBox
> OS : CentOs 7
> Memory : 1G
> Disk : 8GB
> Reporter: Dasol Kim
>
> I installed OS and kafka in the two SSD and two HDDs to perform the kafka
> benchmark test based on the disc difference. As expected, the SSD should show
> faster results, but according to my experimental results, there is no big
> difference between SSD and HDD. why? Ohter settings have been set to default.
> *test settings
> zookeeper node : 1, producer node : 2, broker node : 2(SSD 1, HDD 1)
> test scenario : Two producers send messages to the broker and compare the
> throughtput per second of kafka installed on SSD and kafka on HDD
> command : ./bin/kafka-producer-perf-test.sh --num-records 1000000
> --record-size 2000 --topic test --throughput 100000 --producer-props
> bootstrap.servers=SN02:9092
>
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
