55
from the same client tend to be distributed to different nodes, and SSL setup is
required for each connection.
  ssl with session: The distributor of ssl with session maintains the client informa 
tion to forward subsequent requests from the same client to the same application
server. The advantage of the ssl with session is that it avoids the unnecessary au 
thentication and negotiation phase when a client tries to reconnect to the server.
The disadvantage of this model is that it may cause load imbalance among the
servers. If a server has clients whose requests are frequent and require much dy 
namic computation, the requests cannot be distributed to other lightly loaded
servers, resulting in load skewness among the servers.
  ssl with bf (backend forwarding): The ssl with bf model is aimed at mitigating
the limitation of ssl with session by using a backend forwarding mechanism to
achieve load balance. We deploy a load balancing module in the distributor to
obtain the load information from each application server. The load of ith server, L
i
,
is calculated by the number of open connections. If a cluster consist of N servers,
where the i th node is denoted by n
i
, then L
i
= w
dyn
  r
dyn
i
+ w
sta
  r
stat
,
i
i   {1, ..., N }. Here, w
dyn
and w
stat
are weight variables for dynamic requests
and static requests, and r
dyn
i
and r
stat
are the number of outstanding dynamic
i
and static requests of n
i
, respectively. The load balancer distributes this load
information to all application servers periodically. To forward requests, servers use
two thresholds, T
1
and T
2
. If L
i
> T
1
, i   {1, ..., N }, then n
i
forwards requests
along with a negotiated session key to one of the servers whose load is less than T
2
.












  

Home

About Services Network Support FAQ Order Contact
 

 

Clan Web Hosting

Our partners:Jsp Web Hosting Unlimited Web Hosting Cheapest Web Hosting  Java Web Hosting Web Templates Best Web Templates PHP Mysql Web Hosting Interland Web Hosting Cheap Web Hosting PHP Web Hosting Tomcat Web Hosting Quality Web Hosting Best Web Hosting  Mac Web Hosting 

Lunarwebhost.net  Business web hosting division of Vision Web Hosting Inc. All rights reserved