[Spread-users] Token Message

[Yair Amir]

Hi Yuval,

Spread has some heuristic to understand your network and that does not work
always well for people who use local addresses (e.g. addresses such as 192.168.0.x,
192.168.1.x ..). In such a case, there will be a change you will need to
do manually that may improve things.

E-mail your configuration file and we'll be able to comment. Explain also the
latencies between the segments (and how they are connected).
Cheers,

	:) Yair.


Yuval Lifshitz wrote:
> I have a spread network with two segments, one with
> two daemons and one with one.
> All is working fine except that for each message I
> send through spread there are about 25 extra messages
> sent between the daemons. These are small token
> messages (most are token hurry) messages, but this 25
> factor (with my high rate of messages) flood my
> network.
> 
> Spread is compiled with:
> Token_timeout.sec  =  20
> Hurry_timeout.sec  =   6
> in the wide configuration the daemons use.
> Is that a known problem or configuration problem?
> 
> I tried to investigate the code and saw that the token
> messages is sent in many places (sometimes twice in
> the same place), so I tried to impose the
> "Hurry_timeout" in an ugly way in the code, in
> network.c I added:
> 
> #include <sys/time.h>
> ext	sp_time		Hurry_timeout;
> 
> int	Net_send_token( sys_scatter *scat )
> {
> 	struct timeval now = {0 ,0};
> 	static struct timeval last = {0 ,0};
> 	token_header	*token_ptr;
> 	int		ret;
> 
> 	gettimeofday(&now, NULL);
> 	
> 	if (now.tv_sec - last.tv_sec < Hurry_timeout.sec)
> 	{
>                  printf("too much tokens, time diff
> from last is: %ld\n", now.tv_sec - last.tv_sec);
> 		return 0;
> 	}
> 	
> 	last.tv_sec = now.tv_sec;
> ...
> 
> Is that bad as I think it is?
> 
> Yuval.
> 
> 
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