What is persistence in NetScaler?
With persistence configured, enabling the NetScaler to send any subsequent client requests to the selected server, the server can access state information for that client. If persistence is configured, it overrides the load balancing methods once the server has been selected.
What is Gslb in Citrix?
Citrix Application Delivery Controller (ADC) Global Server Load Balancing (GSLB) is a DNS-based solution which describes a range of technologies to distribute resources around multi-site data center locations.
What is IP persistence?
Session stickiness, a.k.a., session persistence, is a process in which a load balancer creates an affinity between a client and a specific network server for the duration of a session, (i.e., the time a specific IP spends on a website).
What is Gslb service?
A GSLB service is a representation of a load balancing or content switching virtual server. A remote GSLB service represents a load balancing or content switching virtual server configured at one of the other sites in the GSLB setup.
What is persistence in Citrix Load Balancer?
If persistence is configured, it overrides the load balancing methods once the server has been selected. If the configured persistence applies to a service that is down, the appliance uses the load balancing methods to select a new service, and the new service becomes persistent for subsequent requests from the client.
What is persistence in load balancer?
Load balancer session persistence boosts performance by configuring a backend server to work efficiently with user requests. This kind of load balancer sits between users and the website’s server group and implements logic that connects specific servers to user sessions for as long as is needed.
How does a Gslb work?
As its name suggests, GSLB balances network traffic across an organization’s data centers. As client traffic accesses the organization’s services, it is routed intelligently by the GSLB system to the most appropriate data center site.
What is Gslb and what are the supported methods?
GSLB methods are algorithms that the GSLB virtual server uses to select the best-performing GSLB service. After the host name in the Web address is resolved, the client sends traffic directly to the resolved service IP address. The Citrix ADC appliance provides the following GSLB methods: Round Robin.
What are persistent sessions?
Session Persistence (sometimes called sticky sessions) involves directing a user’s requests to one application or backend web server for the duration of a “session.” The session is the time it takes a user to complete a transaction or task that might include multiple requests.
What is source IP persistence in load balancer?
When source IP persistence is configured, the load balancing virtual server uses the configured load balancing method to select a service for the initial request, and then uses the source IP address (client IP address) to identify subsequent requests from that client and send them to the same service.
What is Gslb in AWS?
Global Server Load Balancing (GSLB) is typically used to provide data center failover or to enhance end user performance by directing users to their closest data centers using geolocation. GSLB is a DNS based system that manipulates the DNS response based on the availability and performance profile of the data centers.
What is cookie insert persistence?
A HTTP cookie, is a small piece of data sent from a web/app server and stored in the user’s web browser while the user is browsing it. Choosing COOKIEINSERT as the persistence method enables NetScaler to insert a cookie into server responses, which it uses to track which server the user session belongs to.
How to configure gslb persistence in NetScaler?
In NetScaler, we can configure GSLB persistence based on source IP or HTTP cookies. In source IP persistence, based on IP of user device, persistence is maintained. NetScaler maintains a persistence table for each user device connected and sends the user to appropriate data centre.
What is the difference between source IP persistence on gslb and site persistence?
The source IP persistence on GSLB virtual server and site persistence on GSLB service complements each other. If source IP persistence is disabled on GSLB virtual server, the GSLB virtual server chooses a different GSLB service each time the DNS tries to do the resolution.
How does netnetscaler work?
NetScaler maintains a persistence table for each user device connected and sends the user to appropriate data centre. HTTP cookie-based GSLB persistence is based on cookie in HTTP headers. Gateway virtual server checks the cookie in the HTTP header and accepts, proxies or redirects the request.
Does the Citrix ADC appliance support persistence across sites?
For the Citrix ADC appliance to support persistence across sites, persistence related configuration must be done on all the participating GSLB sites. Citrix recommends persistence in GSLB for stateful applications, which requires clients to reconnect to the same application instance for the subsequent requests.