AWS Snowball User Guide
cache engine version The version of the Memcached service that is running on the cache node.
cache node A fixed-size chunk of secure, network-attached RAM. Each cache node runs an
instance of the Memcached service, and has its own DNS name and port. Multiple
types of cache nodes are supported, each with varying amounts of associated
memory.
cache node type An EC2 instance (p. 129) type used to run the cache node.
cache parameter group A container for cache engine parameter values that can be applied to one or more
cache clusters.
cache security group A group maintained by ElastiCache that combines ingress authorizations to cache
nodes for hosts belonging to Amazon EC2 (p. 111) security group (p. 151)s
specified through the console or the API or command line tools.
canned access policy A standard access control policy that you can apply to a bucket (p. 122)
or object. Options include: private, public-read, public-read-write, and
authenticated-read.
canonicalization The process of converting data into a standard format that a service such as
Amazon S3 (p. 113) can recognize.
capacity The amount of available compute size at a given time. Each Auto Scaling
group (p. 115) is defined with a minimum and maximum compute size. A scaling
activity (p. 150) increases or decreases the capacity within the defined minimum
and maximum values.
cartesian product processor A processor that calculates a cartesian product. Also known as a cartesian data
processor.
cartesian product A mathematical operation that returns a product from multiple sets.
CDN See content delivery network (CDN).
certificate A credential that some AWS products use to authenticate AWS account (p. 109)s
and users. Also known as an X.509 certificate (p. 159) . The certificate is paired
with a private key.
chargeable resources Features or services whose use incurs fees. Although some AWS products are
free, others include charges. For example, in an AWS CloudFormation (p. 116)
stack (p. 153), AWS resource (p. 148)s that have been created incur charges.
The amount charged depends on the usage load. Use the Amazon Web Services
Simple Monthly Calculator at http://calculator.s3.amazonaws.com/calc5.html to
estimate your cost prior to creating instances, stacks, or other resources.
CIDR block Classless Inter-Domain Routing. An internet protocol address allocation and route
aggregation methodology.
See Also Classless Inter-Domain Routing in Wikipedia.
ciphertext Information that has been encrypted (p. 130), as opposed to plaintext (p. 144),
which is information that has not.
ClassicLink A feature for linking an EC2-Classic instance (p. 136) to a VPC (p. 159),
allowing your EC2-Classic instance to communicate with VPC instances using
private IP addresses.
See Also link to VPC, unlink from VPC.
classification In machine learning, a type of problem that seeks to place (classify) a data sample
into a single category or “class.” Often, classification problems are modeled to
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