[Spread-users] One scabby sheep will mar a whole frock

John Schultz jschultz at spreadconcepts.com
Fri Feb 1 11:07:08 EST 2008

The only way I can think would be to have daemons monitor their load and 
if it gets too high, then to voluntarily exclude themselves from the 
membership for a significant period of time (e.g. - at least a minute). 
This would require "vetoing" the current membership in which it resides by 
purposely holding the token until the membership times out. Plus, the 
deamon would have to ignore Spread traffic from all other daemons for the 
exclusion period of time.  In addition, you probably wouldn't want to 
rejoin the system until the load had dropped significantly below your 
exclusion loading threshold to further prevent thrashing.

Other ways of dealing with this are to give Spread real time priority or 
nicing it to very high priority.

John Schultz
Spread Concepts
Phn: 443 838 2200

On Fri, 1 Feb 2008, Lobiv Igor wrote:

> Hi!
> I've red in docs "A user guide to spread Version 10.11"
> 2.4 Tuning spread for performance or unique situations
> 2.4.2 Spread in high-load environments
> End of the page 19, begin of the page 20
> "Since all the daemons in the membership rely on all the others to quickly process the token, send out new packets and then forward the token on,
> if even ONE machine is heavily loaded the token will be significantly slowed
> and ALL Spread daemons will be slowed."
> Is exist way to change this property of spread? May be automatically exclude daemons which load is increased up to X%? X is configured in config file.
> Best regards,
> Igor Lobiv
> Telco Software Development Sector
> SITRONICS Telecom Solutions, Czech Republic a.s.
> Tel.: +420 211 030 655,  Mobile: +420 724 936 638, 	Fax: +420 296 524 103
> BB Centrum - Beta, Vyskočilova 1461/2b, 140 00  Praha 4, Czech Republic
> www.sitronicsts.com
> _______________________________________________
> Spread-users mailing list
> Spread-users at lists.spread.org
> http://lists.spread.org/mailman/listinfo/spread-users

More information about the Spread-users mailing list