3tcollect Utility
The 3tcollect utility is a command-line tool that you can execute on the Backbone Fabric Controller (BFC) or the grid controller to collect log and configuration data.
appliance
An appliance is a self-contained virtual environment that provides a specific function inside an application. Each appliance executes in its own virtualized environment, boots its own operating system, application services, and other required software. It also has a boundary that isolates the interior of the appliance from the exterior and is used to define both the structure of the appliance and how it interacts with other components, including the grid.
Appliances can be managed or unmanaged. Managed appliances contain the appliance kit (APK) which enables communication with the grid controller, auto-configuration of the appliance network interfaces, and the ability to obtain property values from the appliance boundary. Unmanaged appliances do not contain the APK.
Appliances can be simple or assemblies. The term appliance can be used to denote either the appliance class or an instance of the appliance class. See also simple appliance and assembly.
application
An application is a unit of execution on the grid. An application consists of one or more appliances and contains its full infrastructure, configuration, and user data. An application can be a template or an instance. Templates can be used to provision multiple instances.
application boundary
An application boundary is the class boundary of the application as an appliance class (the predefined singleton class main). See also interior.
Application Description Language (ADL)
Application Description Language (ADL) is a structure description language that is used to capture the design of distributed applications in CA AppLogic. ADL is used to represent application infrastructure in text form and is semantically equivalent to XML, but is more suitable for humans. For more information, see the ADL Reference Guide.
application instance
An application instance is a copy of an application that is fully configured and can be run on the grid.
application template
An application template is a partially configured application that is used as a template for provisioning application instances.
application volume
An application volume is a named virtual volume that is attached directly to an application. You use application volumes to deploy HTML files, static content, scripts, code, and databases that are specific to the application. You usually use an application volume with a virtual appliance that is configured with the name of the volume and a directory path on that volume from which the appliance accesses the content it requires.
assembly
An assembly is an appliance that is composed of other appliances. The appliances are interconnected and contained in the packaged structure of the assembly. Assemblies can be used where ever you would use a simple appliance. This allows you to reuse infrastructure without increasing the the complexity of the application. For example, a specialist in database clustering can create a stock assembly for clustered database deployment and publish it in a catalog. Application integrators can then use this assembly in multiple applications, whenever they need database scalability and/or high availability, and without having to know how exactly the cluster is set up and operates. Contrast with simple appliance.
attribute
In appliances, an attribute is a value that affects the way the system schedules and runs the appliance (contrast with property). In ADL, an attribute is a language construct that programmers use to add additional information (such as metadata) to code elements (such as assemblies, modules, members, types, return values, and parameters) to extend their functionality. For more information, see the ADL Reference Guide.
Backbone Fabric Controller (BFC)
The Backbone Fabric Controller (BFC) is a browser-based tool for creating, managing, and modifying CA AppLogic grids.
boundary
The boundary is everything necessary to configure the appliance, bind it to data on external storage volumes, and connect it to other appliances. See also class boundary and application boundary. Contrast with interior.
boundary property
The boundary property is a property that is defined on the boundary of a class or assembly.
boundary volume
The boundary volume is a placeholder volume that is defined on the boundary of a class or assembly.
catalog
A catalog is a library package that contains one or more appliance classes. See also global catalog and local catalog.
catalog class
A catalog class is a class within a global or local catalog that can be used to create appliance instances. Contrast with singleton class.
class
The class is a definition of an appliance, consisting of boundary and volumes, that can be used to create appliance instances. See also catalog class and singleton class. Contrast with instance.
class boundary
The class boundary is all attributes of a class visible from outside of the appliance. The class boundary of appliances includes the class name, terminals, volumes, resources, and properties. Both simple appliances and assemblies have boundaries. See also application boundary. Contrast with the interior.
class volume
The class volume is a volume that is provided as part of the class definition of an appliance and instantiated whenever an instance of the appliance is created. See also virtual volume, instantiable volume, common volume, null volume. Contrast with placeholder volume.
common volume
The common volume is a volume that is provided as part of the class definition of an appliance. However, it is not instantiated when an instance of the appliance is created. See also class volume. Contrast with instantiable volume and null volume.
component
A component is a running instance of an appliance class. A component can have multiple instances of appliances or can contain only one instance of an appliance.
default interface
The default interface is a network interface that lets you log on to the appliance, install software, and troubleshoot it, as you do with any remote server. See also external interface. Contrast with terminal.
deploy
To deploy something means to create an application template or application instance on a grid, by deploying the application code, content, and data on to the grid infrastructure.
external interface
An external interface is a network interface that provides access to the running appliance from the outside world. See also default interface. Contrast with terminal.
failover group
A failover group is an identifier that prevents components within the same failover group from being scheduled on the same physical server device, so that in case of hardware failure, some of them remain alive.
field engineering code
A field engineering code is a special code that enables diagnostic or special features of CA AppLogic. See Field Engineering Codes in the Appliance Developer Guide for details.
global catalog
A global catalog is a library package containing one or more appliance classes that can be used in one or more applications. Contrast with local catalog.
grid
A grid is a collection of servers that host CA AppLogic applications. The server collection is a system that runs on a server array assembled from commodity servers connected using a gigabit ethernet switch. Some (or all) of the servers are expected to have directly attached storage - inexpensive IDE/ATA/SATA hard drives that CA AppLogic uses to provide a distributed storage pool for applications.
input
An input is a terminal for accepting network connections. See also terminal and interface. Contrast with output.
instance
An instance is an instance of an appliance class that is used in a particular application. See also appliance. Contrast with class.
instantiable volume
An instantiable volume is a class volume that is instantiated (copied) when an instance of the appliance class is created. See also class volume. Contrast with common volume and null volume.
interface
An interface is a unique connection point within CA AppLogic. See also terminal, external interface, default interface.
interior
The interior is a structure of virtual appliances that is defined within an assembly. Contrast with the boundary.
local catalog
A local catalog is a library package containing one or more appliance classes that may be used within the application where the local catalog resides. Contrast with global catalog.
migration
migration is the process of moving an entity from one physical server device to another.
null volume
A null volume is a class volume where no volume image is provided. See also class volume. Contrast with instantiable volume and common volume.
output
An output is a terminal for originating network connections. See also terminal and interface. Contrast with input.
placeholder volume
A placeholder volume is a predefined slot for a storage volume. You fill the slot by configuring the appliance with the name of a volume to mount. Contrast with class volume.
property
A property is a configuration parameter of a class that is specific for each instance of an appliance class that is created.
provision (application)
To provision an application means to create an instance of an application from a template. You can assign resources to a provisioned application, configure them, and run them on the grid.
provision (grid)
To provision a grid means to create a grid from a set of physical servers.
resource
A resource in CA AppLogic is a physical computing resource, such as CPU, memory, storage, that can be provided to an appliance or application for its execution.
server
A server is a program or computer that provides a service to other programs or computers that are connected to it.
simple appliance
A simple appliance is a single virtual environment that contains a virtual machine, virtual volumes, and virtual network interfaces. A simple appliance can run its own copy of an operating system (such as Linux) and appliance-specific software. See also appliance. Contrast with assembly.
singleton, singleton class
A singleton, or singleton class, is a class that is limited to a single instance. Contrast with catalog class.
standby
A standby is an appliance attribute specifying that an appliance does not start automatically when the application is started.
start order
A start order is a subordinate attribute that defines the sequence of starting this subordinate attribute, relative to the other subordinates in the same assembly. Lower numbers start first and higher numbers start after all lower numbers have started successfully.
subordinate
A subordinate is a component within an assembly. See also instance.
terminal
A terminal is a connection point for logical interactions between appliances. See also input and output. Contrast with external interface and default interface.
virtual volume
A virtual volume is a logical disk that is exposed by one of the servers in the grid and accessible from virtual machines running on any server.
volume
A volume is a fixed amount of storage on a disk, often used as a synonym for the storage medium itself. See also virtual volume, class volume, placeholder volume, boundary volume, and application volume.
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