why would you use single affinity

What affinity is responsible for when setting up NLB?

With Class C affinity, NLB associates clients with particular members by using the Class C portion of the client's IP address. Thus, clients coming from the same Class C address range always access the same member. This affinity provides the best performance for clusters serving the Internet.

What is affinity in load balancer?

Session affinity, also known as “sticky sessions”, is the function of the load balancer that directs subsequent requests from each unique session to the same Dgraph in the load balancer pool.

What is Drainstop?

Drain stopping allows user sessions to be gracefully removed from disabled servers. This allows users to finish their session before removing servers for maintenance. Drain stopping only occurs for Layer 7 virtual services with persistence. Once a server is disabled, LoadMaster will automatically drain connections.

How do you stop a sticky session?

To avoid this kind of problem, there are several ways:Use a clustered web application server where the session are available for all the servers.Sharing user's session information in a database or a file system on application servers.Use IP level information to maintain affinity between a user and a server.More items...•

What is cookie based affinity?

As outlined in the Azure Application Gateway Documentation, Application Gateway supports cookie based affinity, which means it can direct subsequent traffic from a user session to the same server for processing.

What is the difference between stop and Drainstop to bring down a node?

There's a different between STOP and DRAINSTOP commands. The STOP command will stop the NLB service on host and all existing connections will be lost, whereas DRAINSTOP will allow NLB to serve current connections and disable the new connections at the same time.

What is difference between ALB and NLB?

NLB natively preserves the source IP address in TCP/UDP packets; in contrast, ALB and ELB can be configured to add additional HTTP headers with forwarding information, and those have to be parsed properly by your application.

How many servers can you have in one NLB cluster?

32 serversA Network Load Balancing cluster can scale up to 32 servers. Systems administrators and networking administrators can manage the Network Load Balancing feature through Microsoft's NLB Manager or with PowerShell cmdlets.

What is session affinity in k8s?

Sticky sessions or session affinity, is a feature that allows you to keep a session alive for a certain period of time. In a Kubernetes cluster, all the traffic from a client to an application, even if you scale from 1 to 3 or more replicas, will be redirected to the same pod.

What is server affinity in WebLogic?

The purpose of server affinity is to minimize the number IP sockets opened between external Java clients and server instances in a cluster. WebLogic Server accomplishes this by causing method calls on objects to “stick” to an existing connection, instead of being load balanced among the available server instances.

What is difference between ALB and NLB?

NLB natively preserves the source IP address in TCP/UDP packets; in contrast, ALB and ELB can be configured to add additional HTTP headers with forwarding information, and those have to be parsed properly by your application.

What are the three types of load balancers that ELB offers?

Elastic Load Balancing supports the following types of load balancers: Application Load Balancers, Network Load Balancers, and Classic Load Balancers.