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MQSeries.net Forum IndexWebSphere Message Broker SupportWork Load Management Policy & SFTP in IIB v10

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ghoshly
PostPosted: Wed Oct 04, 2017 1:49 pm Post subject: Work Load Management Policy & SFTP in IIB v10 Reply with quote

Master

Joined: 10 Jan 2008
Posts: 269

Hello,
I am currently using IIB v10.0.0.7 along with MQ v8.0.0.4

Question : If we edit a Work Load Management Policy via WebUI after attaching the same to certain flows, do we need to go back and attach the policy again, or the change will be picked up automatically during the run?

I believe we do not need any reload generally when we attach the policy to flows, but if mqsireload is required to refresh the change, please let me know or suggest a link for my knowledge gain.

We are using WLM Policy (Additional Instances, Start additional instances when flow starts) for flows with SFTP capabilities using File Input and File Output but unable to get message processing rate beyond ~ 2.5 messages/sec.

Packet capture and network trace shows that we are establishing new SFTP session per transaction. Is it possible to configure flow or File nodes to open 1 SFTP session and transmit all the data being processed over that one persistent connection?

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ghoshly
PostPosted: Sat Oct 07, 2017 1:29 pm Post subject: Reply with quote

Master

Joined: 10 Jan 2008
Posts: 269

When we disable remote transfer, the same data and same flow is much faster yielding almost 20 message/sec even without additional instances.

Any help to go over the bottleneck for SFTP operation would be greatly appreciated.
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zpat
PostPosted: Sun Oct 08, 2017 11:03 pm Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5517
Location: UK

SFTP inbound or outbound?

Identify the SFTP daemon(s) which accept the connection and increase the number of concurrent connections allowed.
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error.
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ghoshly
PostPosted: Mon Oct 09, 2017 7:38 am Post subject: Reply with quote

Master

Joined: 10 Jan 2008
Posts: 269

We are using SFTP for both Inbound and Outbound operations. Inbound is really small payload with which we are working ( Just kind a acknowledgement message) and observed files yet to be picked up after 4 - 5 seconds they gets delivered.

Unix admin confirmed that we are not limiting number of connections by daemon. Mentioned below is from sshd_config

Quote:
#MaxSessions 10
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fjb_saper
PostPosted: Mon Oct 09, 2017 8:04 pm Post subject: Reply with quote

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Joined: 18 Nov 2003
Posts: 19304
Location: LI,NY

ghoshly wrote:
We are using SFTP for both Inbound and Outbound operations. Inbound is really small payload with which we are working ( Just kind a acknowledgement message) and observed files yet to be picked up after 4 - 5 seconds they gets delivered.

Unix admin confirmed that we are not limiting number of connections by daemon. Mentioned below is from sshd_config

Quote:
#MaxSessions 10


This looks like a commented out value. What is the default value? 1?
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ghoshly
PostPosted: Wed Oct 11, 2017 1:08 pm Post subject: Reply with quote

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Joined: 10 Jan 2008
Posts: 269

What I hear from AIX admin is , its commented because they are not controlling the parameter. Application has full liberty to use the resources...
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zpat
PostPosted: Wed Oct 11, 2017 11:04 pm Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5517
Location: UK

It might default to 10. Try setting it to 100 and see what happens.
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Well, I don't think there is any question about it. It can only be attributable to human error. This sort of thing has cropped up before, and it has always been due to human error.
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