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Tag Archives: layer4
Client IP persistence OR source IP hash load-balancing?
Client or Source IP ??? Well, this is roughly the same! Depends on people, environment, products, etc… I may use both of them in this article, but be aware that both of them points to the IP that is being … Continue reading
Microsoft Exchange 2013 architectures
Introduction to Microsoft Exchange 2013 There are 2 types of server in Exchange 2013: * Mailbox server * Client Access server Definitions from Microsoft Technet website: * The Client Access server provides authentication, limited redirection, and proxy services, and offers … Continue reading
Posted in Aloha, architecture, exchange, Exchange 2013, layer4, layer7
Tagged exchange 2010, exchange 2013, high-availability, infrastructure, layer4, layer7, reverse-proxy
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load balancing, affinity, persistence, sticky sessions: what you need to know
Synopsis To ensure high availability and performance of Web applications, it is now common to use a load-balancer. While some people uses layer 4 load-balancers, it can be sometime recommended to use layer 7 load-balancers to be more efficient with … Continue reading
Layer 4 load balancing tunnel mode
The tunnel mode looks like the Direct Server Return mode, except that traffic between the load-balancer and the server can be routed. The load-balancer encapsulates the request in an IP tunnel to the server. The server recover the client request … Continue reading
layer 4 load balancing Direct Server Return mode
Direct server return is usually shortened to DSR. In DSR mode, the load-balancer routes packets to the backends without changing anything in it but the destination MAC address. The backends process the requests and answer directly to the clients, without … Continue reading
