check this discussion for more info about UDP pratical informations (not theory) http://stackoverflow.com/questions/1098897/what-is-the-largest-safe-udp-packet-size-on-the-internet http://www.29west.com/docs/THPM/packet-loss-myths.html
check that TCP can loss packets (any protocol without RTS can): Reality--The normal operation of TCP congestion control may cause loss due to queue overflow. See this report for more information. Loss rates of several percent were common under heavy congestion. 2011/2/8 Roberto Spadim <[email protected]>: > just a obs > hash is for server selection, a fast hash function = no problems on > performance (low latency) > in some libraries you can do your hash function too, read source code > and documents of you client library (for a better help in memcached > mail group, use memcached based libraries, try to not use independent > libraries since you can use diferent hash algorithms and put data on > one server and read from another = bad cache hit rate) > > 2011/2/8 dormando <[email protected]>: >>> >>> #1) Should i use consistent hashing. >>> I am not expecting instances to go down randomly. But whenever one >>> machine has to be taken out for maintenance etc, would like to >>> minimize the impact. i read about a reduced performance when switched >>> to consistent hashing. Not sure whether it is still valid. >> >> Er, "yes you should use it". pecl/memcache 3.0 would degrade if you used >> it but you should never use that sfotware. >> > > > > -- > Roberto Spadim > Spadim Technology / SPAEmpresarial > -- Roberto Spadim Spadim Technology / SPAEmpresarial
