Telling senders to back off on overloaded server?

[Kevin Burton]

Ah... so what I really need to do is have a queue that accepts these but
DOES NOT block on capacity ... it would instead block setReadable( false )
when the capacity is hit but still accept writes which go into the buffer.

2011/10/25 Norman Maurer <norman.maurer at googlemail.com>

> Just be aware that this will only prevent future reads. Everything
> that is already in the "queue" will get dispatched to your
> ChannelHandler.
>
> Bye,
> Norman
>
>
> 2011/10/26 Kevin Burton <burtonator at gmail.com>:
> > Brilliant... that's what I thought :)
> >
> > Kevin
> >
> > On Tue, Oct 25, 2011 at 4:45 PM, "이희승 (Trustin Lee)" <trustin at gmail.com>
> > wrote:
> >>
> >> Channel.setReadable(false)?
> >>
> >> Kevin Burton wrote:
> >> > So how do you do this at the TCP layer and not use threads within
> >> > Netty...
> >> >
> >> > You should be able to tell netty to not read from the socket even if
> >> > it is available because you're not yet ready for the data.
> >> >
> >> > This way all TCP protocols will work the same way without application
> >> > specific changes or controlling the client.
> >> >
> >> > Otherwise you have to use lots of threads which defeats the whole
> >> > point :-(
> >> >
> >> > Kevin
> >> >
> >> > On Tue, Oct 25, 2011 at 4:23 PM, "이희승 (Trustin Lee)"
> >> > <trustin at gmail.com <mailto:trustin at gmail.com>> wrote:
> >> >
> >> >     Yes.  If you have more control over the behavior of the client, I
> >> >     would make use of 100-continue, and send an error response when
> >> >     the server is under load.
> >> >
> >> >     HTH
> >> >
> >> >
> >> >     Kevin Burton wrote:
> >> >     > I assume I basically have to change interest ops on the channel
> >> >     when
> >> >     > the buffer is empty/full?
> >> >     >
> >> >     > Kevin
> >> >     >
> >> >     > On Tue, Oct 25, 2011 at 4:18 PM, Kevin Burton
> >> >     <burtonator at gmail.com <mailto:burtonator at gmail.com>
> >> >     > <mailto:burtonator at gmail.com <mailto:burtonator at gmail.com>>>
> >> > wrote:
> >> >     >
> >> >     >     How do I tell the sender of data (I control both) to back
> >> >     off if I
> >> >     >     can't accept any more data on the server?
> >> >     >
> >> >     >     Specifically, I have an HTTP PUT implementation that first
> >> >     writes
> >> >     >     to a queue and then I drain the queue to disk.
> >> >     >
> >> >     >     When the queue fills up because the server is overloaded, I
> >> >     need a
> >> >     >     way to tell the sender to back off...
> >> >     >
> >> >     >     Normally the TCP buffers would just fill up on both ends and
> >> > the
> >> >     >     sender wouldn't receive ACKs any more and wouldn't send more
> >> >     >     packets until the existing ones have been ack'd ...
> >> >     >
> >> >     >     I just don't now how to tell Netty to stop sending me data
> >> >     because
> >> >     >     I can't handle it...
> >> >     >
> >> >     >     I don't want to use any threads in my application if they're
> >> > not
> >> >     >     needed.
> >> >     >
> >> >     >
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