Often, companies use expensive SAN hardware to assure data redundancy. SANs represent a single point of failure risk. And, if you want to run your application in the cloud with the same Windows Server Failover clustering protection, there is no SAN available.
It provides performance-optimized, host-based replication to synchronize local storage in all cluster nodes, creating a SANless cluster. While WSFC manages the cluster, SIOS DataKeeper performs synchronous or asynchronous replication of the storage giving the standby nodes immediate access to the most current data in the event of a failover.
This lets you query and run reports faster and make faster decisions. It is a tightly integrated clustering solution that combines high availability failover clustering, continuous application monitoring, data replication, and configurable recovery policies to protect your business-critical applications and data from downtime and disasters.
When changes occur on any node, updated information is automatically propagated to all other nodes. It can stop and restart an application both locally and on another cluster server at the same site or in another location. When a problem is detected, SIOS Protection Suite automatically performs the recovery actions and automatically manages cascading and prioritized failovers.
SIOS Protection Suite for Windows can meet your high availability and disaster recovery needs within a single site and across multiple sites.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. Privacy policy. A failover cluster is a group of independent computers that work together to increase the availability and scalability of clustered roles formerly called clustered applications and services.
The clustered servers called nodes are connected by physical cables and by software. If one or more of the cluster nodes fail, other nodes begin to provide service a process known as failover. In addition, the clustered roles are proactively monitored to verify that they are working properly. If they are not working, they are restarted or moved to another node.
Failover clusters also provide Cluster Shared Volume CSV functionality that provides a consistent, distributed namespace that clustered roles can use to access shared storage from all nodes.
AntiAffinity is the same but is used to try to keep the specified roles apart from each other. In previous versions of Windows Server, we only had AntiAffinity capabilities. We took a look at what we were doing and made it better. Now, not only do we have AntiAffinity, but also Affinity.
The below doc discusses the feature in more detail including how to configure it. For those that still use AntiAffinityClassNames, we will still honor it.
Which means, upgrading to Windows Server AutoSites is basically what is says. When you configure Failover Clustering, it will first look into Active Directory to see if Sites are configured.
For example:. If they are and the nodes are included in a site, we will automatically create site fault domains and put the nodes in the fault domain they are a member of. For example, if you had two nodes in a Redmond site and two nodes in a Seattle site, it would look like this once the cluster is created.
As you can see, we will create the site fault domain name the same as what it is in Active Directory. If sites are not configured within Active Directory, we will then look at the networks to see if there are differences as well as networks common to each other.
For example, say you had the nodes with this network configuration:. We will see this as multiple nodes in one subnet and multiple nodes in another.
Therefore, these nodes are in separate sites and it will configure sites for you automatically. With this configuration, it will create the site fault domains with the names of the networks.
This will make things easier when you want to create a stretched Failover Cluster. Since we just mentioned Storage Spaces Direct, one of the talked about features of it is repair. As a refresher, as data is written to drives, it is spread throughout all drives on all the nodes.
When a node goes down for maintenance, crashes, or whatever the case may be, once it comes back up, there is a "repair" job run where data is moved around and onto the drives, if necessary, of the node that came back. A repair is basically a resync of the data between all the nodes. Depending on the amount of time the node was down, the longer it could take for the repair to complete. A repair in previous versions would take the extent block of data that is normally 1 gigabyte or megabyte in size and resync it in its entirety.
It did not matter how much of the extent was changed for example 1 kilobyte , the entire extent is copied. In Windows Server , we have changed this thinking and now work off of "sub-extents".
A sub-extent is only a portion of the entire extent. Report abusive group. Uploads - What is wrong with Easynews. Looking for Star Trek Discovery season 1 Episodes 6 onwards in english. Why does it seem there are no. Rodney R. Fournier [MVP] , … nicholaslee Re: NLB.
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