Instances are hosted in multiple locations worldwide. An AZ is a set of isolated locations
within a region. A region is a separate geographic area.
Azure Blob Storage (ABS)
Azure service used to allocate permanent storage volumes for Yellowbrick instances.
Azure Kubernetes Service (AKS) cluster
An AKS control plane and a set of nodes that run Kubernetes software. The cluster runs in
an account managed by Azure on its own set of Azure virtual machine instances.
bulk loader (ybload)
The client program used for running bulk loads on Yellowbrick tables.
capacity expansion
The process of adding nodes to a cluster.
CDWM
Cloud Data Warehouse Manager, the control plane for a cloud deployment of Yellowbrick Data
Warehouse.
CloudFormation
AWS service that deploys software stacks for cloud applications, using standard templates
and web-based forms.
cluster
Virtual compute cluster, which runs queries and other operations, using hardware resources
allocated to a specific Yellowbrick data warehouse instance.
column-level encryption
Automatic encryption of sensitive data loaded into specific columns, as defined in the
CREATE TABLE statement.
column store
Persistent columnar storage of table rows in shards on the worker node file systems.
A node in a virtual compute cluster, backed by cloud-based hardware of a specific instance
type. Also known as a worker node.
compute processes
Processes launched on the compute (worker) nodes. In general, Yellowbrick queries use
massively parallel processing, with all of the nodes sharing the work. One process on a given
node is elected to run the final phase of a given query.
cross-database queries
Queries that reference tables and views in different databases.
data warehouse instance
A deployed and provisioned data warehouse that runs in a cloud environment, typically with
limits imposed on its hardware resources.
database
A physical SQL database created in a Yellowbrick Data Warehouse instance.
distribution key
A column in a table that is declared in the CREATE TABLE statement as the key for
distributing data evenly among the analytic blades.
DNS zone
Domain Name System (DNS) web service that connects user requests to internet applications
running on Azure. A DNS zone assigns a custom domain name in your VPC, and provides access to
that domain, making use of internal Azure resources and servers.
Elastic Block Storage (EBS)
AWS service used to allocate permanent storage volumes for Yellowbrick instances.
EC2 instance
A virtual server in Amazon's Elastic Compute Cloud (EC2) for running applications on the
AWS infrastructure.
EKS cluster
An Elastic Kubernetes Service (EKS) control plane and a set of nodes that run Kubernetes
software. The cluster runs in an account managed by AWS on its own set of Amazon EC2
instances.
external table
A table that is stored outside the database in an NFS-mounted file system.
flex pool
A WLM resource pool with flexible concurrency settings.
flushing
Background operation that periodically moves table rows from the row store to the column
store.
Lime compiler
Compiler on the control node that generates C++ code for incoming SQL commands and queries.
This code is shipped to the worker nodes for processing.
object storage
Remote source files supported by ybload and ybunload,
such as Azure Blob and AWS S3.
parquet format
Apache Parquet is a binary structured data format that you can load into Yellowbrick
tables. Unloads in parquet format are also supported.
PG
PostgreSQL front-end database.
Helm chart
A collection of files that describe a related set of Kubernetes resources, laid out in a
specific directory tree and packaged for cloud deployment.
Open-source software that automates deployment, scaling, and management of containerized
applications.
observability stack
The stack that supports Grafana monitoring and logging to an observability bucket for
remote diagnostics.
pod
A deployable group of Kubernetes containers, with shared storage and network resources.
profile
In AWS, an account configuration with specific settings for region, role, start URL, and so
on.
replicated table
A table that is copied rather than distributed across all of the nodes so that all worker
processes have immediate local access to all of its data.
Resource Manager
An Azure service that deploys software stacks for cloud applications, using standard
templates and web-based forms.
root stack
The top-level software stack that is deployed to a VPC when you create a stack in AWS or
Azure.
Route 53 hosted zone
Route 53 is a Domain Name System (DNS) web service, connecting user requests to internet
applications running on AWS. A Route 53 zone assigns a custom domain name in your VPC, and
provides access to that domain, making use of internal AWS resources and servers.
row store
Temporary storage for results of INSERT INTO...VALUES statements and
ybsql \copy operations. Rows are periodically flushed to the column store.
savepoint
A marker within a transaction. Transactions may be rolled back to savepoints.
A column in a table that is declared in the CREATE TABLE statement as the key for sorting
data in the storage system on the analytic blades.
SSL
Secure Sockets Layer, a communications protocol for authenticated and encrypted connections
over a network. See TLS.
stack
A packaged, installable set of resources and files that are needed to run an application in
a cloud-based environment.
stored procedure
Executable PL/pgSQL code that combines application logic and SQL constructs to perform
actions in the database.
system table
A table in the system catalog that contains persistently stored data (data from log files).
System tables describe database objects, storage data, and other metadata.
system view
A view built over one or more system tables or virtual tables. System views are available
from the sys schema.
TLS
Transport Layer Security, a communications protocol for authenticated and encrypted
connections over a network. The TLS and SSL terms tend to be used interchangeably. SSL/TLS is
also used.
A virtual server in Azure for running applications on the Azure infrastructure.
virtual table
A table in the system catalog that is dynamically generated based on current activity on
the system. These tables capture statistics for queries, CPU and memory utilization, and file
system information.
