[FUGSPBR] Load Balance/Load Sharing

[Patrick Tracanelli]

Rodrigo Ricardo Passos wrote:
>  
> 
> Fala pessoal ... Alguem já implemento Balanceamento de Cargas em FreeBSD
> ??????
>  
>  
> Estou precisando de um help ....
>  
> Valeu...
> --R2


  Da man page do natd:

-redirect_address localIP[,localIP[,...]] publicIP
                  These forms of -redirect_port and -redirect_address 
are used
                  to transparently offload network load on a single 
server and
                  distribute the load across a pool of servers.  This 
function
                  is known as LSNAT (RFC 2391).  For example, the argument

                        tcp www1:http,www2:http,www3:http www:http

                  means that incoming HTTP requests for host www will be 
trans-
                  parently redirected to one of the www1, www2 or www3, 
where a
                  host is selected simply on a round-robin basis, without
                  regard to load on the net.



Alguns links de interesse:

http://people.freebsd.org/~keichii/

http://balance.sourceforge.net/

ww.polyserve.com/literature/PAM-20serverAB.pdf

http://www.measurement-factory.com/mail-archive/trice/200106/0000.html

http://www.networkcomputing.com/1306/1306sp2.html

http://www.backhand.org/mod_backhand/ (soh interessa pra load balancinh 
de WWW com Apache)

http://www.advogato.org/person/asmodai/ (alguns links de lb perdidos...)

http://zazu.maxwell.syr.edu/tfeed/cluster.txt

http://www.senet.com.au/members/announcements/alteon.html

http://www.internetweek.com/reviews00/rev091800-3.htm



http://www.webopedia.com/TERM/R/Round_Robin_DNS.html

http://www.itworld.com/nl/unix_sys_adm/02072001/

http://www.onjava.com/pub/a/onjava/2001/09/26/load.html

www.polyserve.com/support/whitepapers/ tech_tip_DNS_RR.pdf

http://www.nwfusion.com/news/tech/2000/0731tech.html

http://www.webtechniques.com/archives/1998/05/engelschall/

http://freebsd.ntu.edu.tw/doc/webfarm/

http://www.netwiz.net/~varmav/tips-tools/firewall_paper.shtml


Creio que eh o bastante pra dar uma ideia inicial de implementacoes pra 
balancear sua carga via DNS e via firewall (e NAT). A maioria da 
solucoes eh round robin, mas tem algumas outras boas ideias tambem...
  Paz Profunda,
Patrick Tracanelli

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