Receiving Helpdesk

what is drainstop

by Ms. Baby Terry Published 3 years ago Updated 3 years ago

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.

Full Answer

What is the use of drainstop command?

What is Drainstop? drainstop. drainstop: For Network Load Balancing, a command that disables all new traffic handling on the specified hosts. The hosts then enter draining mode to complete existing connections. While draining, hosts remain in the cluster and stop their cluster operations when there are no more active connections.

What is the difference between drainstop and STOP commands in NLB?

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. IGMP can be configured only when Cluster is configured to use Multicast support.

What is a toe touch drain stopper?

A toe-touch stopper (also called a toe-tap or foot-actuated) is closely related to the lift-and-turn and the push-and-pull stopper. This type uses a spring-loaded design, and the stopper body is held in place to the crossbar on the drain fitting via a screw found underneath the cap of the stopper.

Where is the stopper on a lift and turn drain?

This type of stopper is installed by screwing a center setscrew into the threaded center of the drain crossbar. The setscrew is found beneath the top cap of the stopper. Removing a lift and turn stopper can be a little tricky if it was overtightened when first installed or if it hasn’t been removed in some time.

What is Drainstop in NLB?

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 NLB used for?

The Network Load Balancing (NLB) feature distributes traffic across several servers by using the TCP/IP networking protocol. By combining two or more computers that are running applications into a single virtual cluster, NLB provides reliability and performance for web servers and other mission-critical servers.

What is load balancer?

A load balancer is a device that acts as a reverse proxy and distributes network or application traffic across a number of servers. Load balancers are used to increase capacity (concurrent users) and reliability of applications.

What does it mean to drain a server?

When a server is drained it stops taking new connections and calls. These new connections and calls are routed through other servers in the pool. A server being drained allows its sessions on existing connections to continue until they naturally end.

Is NLB a load balancer?

A Network Load Balancer (NLB) works at layer 4 only and can handle both TCP and UDP, as well as TCP connections encrypted with TLS. Its main feature is that it has a very high performance. Also, it uses static IP addresses and can be assigned Elastic IPs—not possible with ALB and ELB.

Where is network load balancer used?

Best use cases for Network Load Balancer:When you need to seamlessly support spiky or high-volume inbound TCP requests.When you need to support a static or elastic IP address.If you are using container services and/or want to support more than one port on an EC2 instance.

How is load balancer works?

The load balancer works to steer the traffic to a pool of available servers through various load balancing algorithms. If more resources are needed, additional servers can be added. Load balancers health check the application on the server to determine its availability.

What are two types of load balancer?

Elastic Load Balancing supports the following types of load balancers: Application Load Balancers, Network Load Balancers, and Classic Load Balancers. Amazon ECS services can use these types of load balancer. Application Load Balancers are used to route HTTP/HTTPS (or Layer 7) traffic.

What are examples of load balancers?

The following are few examples of software load balancers:HAProxy – A TCP load balancer.NGINX – A http load balancer with SSL termination support. ... mod_athena – Apache based http load balancer.Varnish – A reverse proxy based load balancer.Balance – Open source TCP load balancer.More items...•

How do you drain a server?

How to put a terminal server into drain mode?“Allow new user logons” – All remote connections are allowed.“Deny new user logons” – Terminal Server is in drain mode.“Deny new user logons until restart” – Terminal Server is in drain mode until the server is restarted.

What is Load Balancer draining?

To ensure that a Classic Load Balancer stops sending requests to instances that are de-registering or unhealthy, while keeping the existing connections open, use connection draining. This enables the load balancer to complete in-flight requests made to instances that are de-registering or unhealthy.

How do I power drain a server?

Disconnect all power cables and network cables from the system. Hold down the power button continuously for at least 15 seconds. Reconnect all power cables and network cables to the system. Wait about 2 minutes before powering on server to give the out-of-band management, like a Dell EMC iDRAC, time to initialize.

What are the different types of drain stoppers?

The most common types of bathtub drain stoppers are lift-and-turn, push-and-pull, pop-up, toe-touch, flip-it, and trip lever. Identifying which type you have will help you when it becomes necessary to fix or replace your drain stopper. Some kinds of drain stoppers can make it rather tricky to routinely clean out the drain of hair and debris.

What is the purpose of a spruce drain stopper?

The Spruce / Kelly Miller. Although they all serve the same purpose—to keep water in the bathtub when desired and allow the tub to be emptied again —there are several different styles of bathtub drain stoppers. The most common types of bathtub drain stoppers are lift-and-turn, push-and-pull, pop-up, toe-touch, flip-it, and trip lever.

What is a push and pull stopper?

A push-and-pull stopper is very similar to a lift-and-turn stopper in design and look , but it is pushed down to close and pulled up to open rather than twisting to open and close. Installation is also similar, with the stopper body attached to the drain with a setscrew found under the cap of the stopper.

Where is the trip lever stopper?

The trip lever stopper is one of two types featuring a lever found on the overflow plate at the front of the tub. In this first type, there is no visible pop-up stopper in the drain opening—just a strainer.

How to Remove Drain Stoppers

There are several types of drain stoppers, and it's important to know which type you have in your bathroom before you begin. Every type has different removal and cleaning instructions. If you aren’t sure which drain stopper type you have, this article can help.

How to Clean the Drain Stopper

Now that you know how to remove drain stoppers in the sink and bathtub, it's time to learn how to clean a dirty stopper. Fortunately, the same cleaning processes work for most drain stoppers.

How to Reattach the Drain Stopper

Finally, you need to learn to reinstall drain stoppers. Generally, to reinstall the drain stopper, you’ll do the installation steps backwards. If you don’t have a flat-head screwdriver, you can also use an electric drill. After reattaching, turn on the water to see if it's operating normally.

The Easy Way to Remove Drain Stoppers

A dirty drain stopper can't do its job because the gunk, debris, and soap scum build-up impede clearing water. When a drain stopper is clean, it can effectively keep water from entering the drain. It also means you can drain the sink and bath water quickly so you can tend to important tasks around the house.

How to Fix A Bathroom Sink Drain Stopper: 4 Easy Solutions

One of the most common issues – is that the lift rod moves up and down but the stopper doesn’t move. Or something along those lines! Here are four potential solutions that will hopefully fix things up.

4. Does the stopper go up but not down and the stopper is not damaged?

Is your issue that you can push the stopper up – but it never pulls down? A common reason for that is the bottom of the stopper is positioned 90 degrees offset.

The Wrap Up

I hope this helped you out! I know these plumbing projects can be intimidating, but they’re often more accessible than they seem once you get to know the parts a little better.

How to put terminal server in drain mode?

There are two ways an administrator can put a terminal server into drain mode: 1) using the command-line tool chglogon.exe, or 2) using Terminal Services Configuration UI. 1. Command-line settings. The command-line tool chglogon.exe (or “change logon”) may be used to configure the drain mode.

Can you log on to a server while it is draining?

While a server is in drain mode, administrators may still log on to the physical console or remotely log on using the /admin or /console command-line option for MSTSC. This allows administrators to remotely maintain the Terminal Server.

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      • 26. /vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:61
    App\Models\FakeUser
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    Outl1ne\MenuBuilder\Models\MenuItem
    1
    Outl1ne\MenuBuilder\Models\Menu
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    App\Models\JsonPostContent
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    App\Models\Post
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