Arctera Application Mobility Service Help

Gateway

A gateway is a node that connects two networks with different transmission protocols together. Basically, they are protocol converters facilitating compatibility between two protocols.

Network gateway

The most common type of gateways which acts as an interface between two networks using distinct protocols. Whenever you hear "gateway" without a specific type, it usually refers to a network gateway.

Cloud storage gateway

Another type of gateways which translates storage requests made using cloud storage service APIs (e.g., SOAP or REST), and simplifies data communication by integrating private cloud storage into applications.

Cluster

A computer cluster is a set of interconnected computers or servers that work together to provide a unified computing resource. These clusters are often used to improve the scalability, performance, and redundancy of applications.

Resiliency

It refers to the ability of a cloud-based system or infrastructure to withstand and recover from failures, disruptions, or unexpected events while maintaining its functionality and performance.

SSH

SSH, or Secure Shell Protocol, is a remote administration protocol that allows users to access, control, and modify their remote servers over the internet. It is a cryptographic network protocol for operating network services securely over an unsecured network.

Sudo user

Sudo, or SuperUser DO, is used to access restricted files and operations. By default, Linux restricts access to certain parts of the system preventing sensitive files from being compromised. The sudo command temporarily elevates privileges allowing users to complete sensitive tasks without logging in as the root user.

Availability zone

Availability Zones are isolated locations within a region designed for high redundancy and availability. They are interconnected with low-latency links, ensuring reliable access to applications and data.

Veritas file system (VxFS)

A file system organizes computer files and their data for easy access. It includes abstract data types like metadata for storage, organization, and retrieval of data. Veritas File System (VxFS) is a journaling file system, improving throughput by writing metadata changes first to a log and then to disk asynchronously.

EC2 instance

An Amazon EC2 instance is a virtual server in Amazon's Elastic Compute Cloud (EC2) for running applications on the Amazon Web Services (AWS) infrastructure.

EBS volume

Amazon Elastic Block Store volume is a block-level storage device that you can attach to your EC2 instances. After you attach a volume to an instance, it is like a storage disk that can store different sizes of data.

Veritas Volume Replicator (VVR)

Veritas Volume Replicator (VVR) is data-replication software designed to contribute to an effective disaster recovery plan. VVR enables you to maintain a consistent copy of application data at one or more remote locations.

Veritas Cluster Service (VCS)

VCS is a high-availability cluster software for Unix, Linux and MS Windows computer systems that provides application cluster capabilities.

High-availability clusters

Also known as HA clusters or failover clusters, they are the group of computers that support server applications that can be reliably utilized with a minimum amount of downtime. In the event of application unavailability due to primary server being crashed, HA clusters detect hardware or software faults, and immediately initiate the failover operation.

SFHA

Arctera Storage Foundation High Availability provides high availability for applications and services by clustering multiple servers. If one server fails, the application or service is automatically restarted on another server in the cluster. It ensures data integrity and accessibility by integrating with Veritas Volume Manager (VxVM) and Veritas File System (VxFS).

SFCFSHA

Arctera Storage Foundation Cluster File System High Availability extends the capabilities of SFHA by adding a clustered file system (CFS). This enables multiple nodes in the cluster to concurrently access the same file system.

Application Switchover

A switchover is a user-initiated action via the high availability (HA) clustering solution user interface or CLI. In a switchover, the user manually initiates the action to change the source or primary server for the protected application.

Failover

A failover operation is typically a non-user initiated action in response to a server crash or unexpected/unplanned reboot. This primarily includes switching to a redundant or standby computer server upon the failure or abnormal termination of the previously active application or server.

Machine Images

Machine Images are the pre-configured templates used to launch new instances in the cloud. They include the operating system, software packages, and configurations necessary for instance setup. Machine Images facilitate quick and consistent instance deployment, as they can be shared and reused across various projects or cloud service provider accounts.

Network Security Group

A Network Security Group (NSG) is a virtual firewall for a set of cloud resources that have the same security posture. It consists of a set of access control rules that apply only to your compute instances in a single virtual cloud network.

Elastic Network Interfaces

Elastic Network Interface is simply a virtual interface that can be attached to an instance in a Virtual Private Cloud (VPC). By default, each instance will have a primary network interface.

Elastic Load Balancing

Elastic Load Balancing is a service that distributes incoming application traffic across multiple compute resources in a single Availability Zone or across multiple Availability Zones.

Replication Volume Group

A Replicated Volume Group (RVG) is a group of volumes within a given VxVM disk group configured for replication.

Storage Replicator Log

The Storage Replicator Log (SRL) is a circular buffer of writes for an RVG. Each RVG contains one SRL. Writes to the data volumes in the RVG are first queued in the SRL on the Primary host before they are sent to the Secondary. VVR uses the SRL to track the order of writes to data volumes in the RVG.