Re: [jgroups-dev] How to implement/use flow control in JGroups

Vladimir Blagojevic <[email protected]>
Newsgroups gmane.comp.java.javagroups.devel
Message-ID <[email protected]>
On 2010-08-15, at 11:10 PM, Mike Jensen wrote:

> I think I found a good solution here.  Let me know if you see any 
> problems with this.
> 
> I have set it up to use TCP, and removed the FC protocol.  I then 
> configured TCP to not use the send queue.  It seems that this allows us 
> to block (I assume from the kernel level from a quick inspection).  I 
> then just added a thread pool to handle calling back to alert we are 
> ready to send more.  Any worries about this setup?

No that is ok.

> 
> I tried to remove STABLE and NAKACK.  As I did not understand a need for 
> these with the use of TCP (unless a server goes down, in which case I am 
> not concerned).  But I continue to get warnings where it says 
> digest=null.  But I noticed that these protocols are in the default TCP 
> xml config files.  My question is what do these provide on a TCP layer?
> 


No, you absolutely need both STABLE and NAKACK.

Cheers

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