Telling senders to back off on overloaded server?

[Norman Maurer]

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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