[
https://issues.apache.org/jira/browse/SSHD-1169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17458136#comment-17458136
]
zhaizeyu edited comment on SSHD-1169 at 12/13/21, 3:08 AM:
-----------------------------------------------------------
I tried to do a comparative experiment, using jsch implementation of the java
client to connect to the SFTP server. Compared with groups 1 and 3, 9 and 10,
restarting the SFTP server does not increase the throughput. The SFTP
performance may not deteriorate due to time-lapse, but may be affected by other
causes.[~gnodet]
|No.|threads|cycles|file size（M)|Number of files|Total Execution Time|Execution
duration when no file is transferred|Actual SFTP
Duration|Throughput（M/s）|Throughput/threads|Remarks|
|1|20|10|109|200|121.1|23.2|97.9|222.68|11.1338| |
|2|20|1|109|20|11|2.7|8.3|262.65|13.1325| |
|3|20|10|109|200|117.6|21.5|96.1|226.85|11.3424|After the SFTP server is
restarted|
|4|1|10|109|10|87.1|39.9|47.2|23.093|23.0932| |
|5|1|1|109|1|4.62|2.2|2.42|45.041|45.0413| |
|6|20|100|2.6|2000|290.4|238.2|52.2|99.617|4.98084| |
|7|20|1|2.6|20|4.4|3.9|0.5|104|5.2| |
|8|20|10|2.6|200|28.6|23.5|5.1|101.96|5.09804| |
|9|20|100|109|2000|1229.4|242.7|986.7|220.94|11.0469| |
|10|20|100|109|2000|1230.2|241.3|988.9|220.45|11.0223|After the SFTP server is
restarted|
was (Author: JIRAUSER281606):
I tried to do a comparative experiment, using jsch implementation of the java
client to connect to the SFTP server. Compared with groups 1 and 3, 9 and 10,
restarting the SFTP server does not increase the throughput. The SFTP
performance may not deteriorate due to time-lapse, but may be affected by other
causes.
|No.|threads|cycles|file size（M)|Number of files|Total Execution Time|Execution
duration when no file is transferred|Actual SFTP
Duration|Throughput（M/s）|Throughput/threads|Remarks|
|1|20|10|109|200|121.1|23.2|97.9|222.68|11.1338| |
|2|20|1|109|20|11|2.7|8.3|262.65|13.1325| |
|3|20|10|109|200|117.6|21.5|96.1|226.85|11.3424|After the SFTP server is
restarted|
|4|1|10|109|10|87.1|39.9|47.2|23.093|23.0932| |
|5|1|1|109|1|4.62|2.2|2.42|45.041|45.0413| |
|6|20|100|2.6|2000|290.4|238.2|52.2|99.617|4.98084| |
|7|20|1|2.6|20|4.4|3.9|0.5|104|5.2| |
|8|20|10|2.6|200|28.6|23.5|5.1|101.96|5.09804| |
|9|20|100|109|2000|1229.4|242.7|986.7|220.94|11.0469| |
|10|20|100|109|2000|1230.2|241.3|988.9|220.45|11.0223|After the SFTP server is
restarted|
> Sftp Server throughput is lagging for concurrent threads
> --------------------------------------------------------
>
> Key: SSHD-1169
> URL: https://issues.apache.org/jira/browse/SSHD-1169
> Project: MINA SSHD
> Issue Type: Improvement
> Affects Versions: 2.5.1
> Reporter: Susmit Sarkar
> Priority: Blocker
> Attachments: image-2021-05-19-10-27-20-261.png
>
>
> Hello Team,
> We are seeing a considerably low throughput for large-sized file (100Mb sized
> file during concurrent execution)
> We did some load testing and the throughputs sometimes increase (when we do a
> VM reboot for 1st run) and sometimes its pretty low compare to commercial
> servers
>
> *2000 cycle runs | 20 concurrent threads | 100mb files == Throughput is 0.94
> documents per seconds*
> For a commercial server, it's around 1.17 documents per second.
> Now if we do a server reboot and re-execute the test then the throughput
> increases by leaps and bounds
> *2000 cycle runs | 20 concurrent threads | 100 MB files == Throughput is 1.90
> documents per seconds (More than 100 percent)*
> *cycle means 100 MB file upload times, 2000 means 2000times*100 MB which got
> distributed by 20 concurrent sftp sessions*
> I am using IO Factory as NIO2, and below are the combinations for different
> NIO worker threads
> !image-2021-05-19-10-27-20-261.png!
> We are pretty confused and need help. For small files, Apache performed very
> well the throughput was 30 percent better than commercial server, but for
> large files, we are seeing these issues sometimes (mostly with reboot it
> performs good, but after that run its starts lagging)
> nio-workers ===> *varies from the chart above*
> max-auth-requests ===> 3
> Compression ===> NONE
> max-concurrent-sessions ===> 2147483647
> packet-size ===> 65536
> idle-timeout ===> 300000
> server-identification ===> SFTP Server
> window-size ===> 4194304
> we are setting currently all this properties to *SshServer*, is there any
> performance tuning parameter can be used?
>
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
