[jboss-jira] [JBoss JIRA] Commented: (JGRP-1259) Reduce size of large headers: place data into message itself
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https://issues.jboss.org/browse/JGRP-1259?page=com.atlassian.jira.plugin....
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Bela Ban commented on JGRP-1259:
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The problem is that FRAG2 is at the top of the stack (needs to be there because it has to
be ovre flow control somewhere) Subsequent protocols further down add headers, so FRAG2
should be just over the transport, but that canot be done because of flow control... we
*could* have a FRAG2 at the top *and* a FRAG protocol (which marshalls the entire message
including headers), but this is overhead...
Reduce size of large headers: place data into message itself
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Key: JGRP-1259
URL: https://issues.jboss.org/browse/JGRP-1259
Project: JGroups
Issue Type: Feature Request
Reporter: Bela Ban
Assignee: Bela Ban
Fix For: 2.12
When we send a view around, we essentially create an empty Message and attach a
GmsHeader.VIEW with the new view.
If the view consists of 200 members, the view header will be very big and the message is
still empty (null buffer).
The issue here is that FRAG2 only fragments the message's buffer (this is faster),
and so a huge header might add so much to the size of a serialized message that the
transport (UDP) won't be able to send it !
SOLUTION: still use the header (e.g. GmsHeader.VIEW), but place potentially large
payloads into the message. This will allow FRAG2 to fragment the message very efficiently.
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