message size limit

[r***@us.hsbc.com]

My system send messages to a queue. However, the size of the message over the default max message size limit(64K).
I want to increase the max message size limit, but I am wondering the impact to the system.
Is there any one have try to increase the max message size of a queue?

[Phil Willoughby]

Post by r***@us.hsbc.com
My system send messages to a queue. However, the size of the message
over the default max message size limit(64K). I want to increase the
max message size limit, but I am wondering the impact to the system.
Is there any one have try to increase the max message size of a queue?

The default maximum message size is 4 MiB in recent versions of MQ, and
I routinely use messages up to 2 MiB without problems.

Your MQ administrators have probably set a lower size limit to help them
with their capacity planning; I suggest you ask them whether they're
happy for you to change it.

Regards,

Phil Willoughby

[a***@swift.com]

I understand the message size limit (MAXMSGL) on MQ 5.3 is 100 MB. However, IBM is positioning v 6.0 MQ as a secure alternative to FTP. Does anybody have any idea what the file size limit is on MQ v 6.0 ?

[Carl Farkas]

MQ is NOT positioned as an alternative to FTP. MQ is a MOM. Other products
ON TOP OF MQ provide the file transfer function, for example PM4Data. MQ
has a MESSAGE limit of 100MB, but the file transfer products typically don't
have any limits as the cut the file up into reasonable message chunks and
then glue them back together upon arrival.

[a***@swift.com]

Thanks for the clarification, Carl. I was reading the IBM page<br />
<br />
http://www-306.ibm.com/software/info1/websphere/index.jsp?tab=integration/esb4files<br />
<br />
which seems to push MQ as a secure alternative to FTP. I thought if I wanted to use MQ v 6.0 for transferring files, the 100 MB limit might be an issue.

[Phil Willoughby]

Post by a***@swift.com
I understand the message size limit (MAXMSGL) on MQ 5.3 is 100 MB.
However, IBM is positioning v 6.0 MQ as a secure alternative to FTP.
Does anybody have any idea what the file size limit is on MQ v 6.0 ?

The upper limit on an individual message's size has not changed; it is
still 100Mb. However, it is not necessary to have each file in a single
message - more commonly each file will be split into pieces sized
10Kb-1Mb or so and placed into a sequence of messages with a common
GroupId. These are then reassembled at the other end.

Regards,

Phil Willoughby

[a***@uk.ibm.com]

On 8 July 2008, IBM announced a new offering for Managed File Transfer: IBM WebSphere MQ File Transfer Edition V7.0. This expansion of WebSphere MQ, the core of

the SOA Messaging Backbone, will introduce managed file transfer services enabling customers to simplify the transfer and auditing of files and documents as part of their SOA. See http://www-306.ibm.com/software/integration/wmq/filetransfer/ for more details.