AWS Snowball User Guide
instance A copy of an Amazon Machine Image (AMI) (p. 112) running as a virtual server in
the AWS cloud.
instance family A general instance type (p. 136) grouping using either storage or CPU capacity.
instance group A Hadoop (p. 134) cluster contains one master instance group that contains
one master node (p. 140), a core instance group containing one or more core
node (p. 125) and an optional task node (p. 156) instance group, which can
contain any number of task nodes.
instance profile A container that passes IAM (p. 118) role (p. 149) information to an EC2
instance (p. 129) at launch.
instance store Disk storage that is physically attached to the host computer for an EC2
instance (p. 129), and therefore has the same lifespan as the instance. When the
instance is terminated, you lose any data in the instance store.
instance store-backed AMI A type of Amazon Machine Image (AMI) (p. 112) whose instance (p. 136)s use
an instance store (p. 136) volume (p. 158) as the root device. Compare this
with instances launched from Amazon EBS (p. 110)-backed AMIs, which use an
Amazon EBS volume as the root device.
instance type A specification that defines the memory, CPU, storage capacity, and usage
cost for an instance (p. 136). Some instance types are designed for standard
applications, whereas others are designed for CPU-intensive, memory-intensive
applications, and so on.
internet gateway Connects a network to the internet. You can route traffic for IP addresses outside
your VPC (p. 159) to the internet gateway.
internet service provider A company that provides subscribers with access to the internet. Many ISPs are
also mailbox provider (p. 139)s. Mailbox providers are sometimes referred to as
ISPs, even if they only provide mailbox services.
intrinsic function A special action in a AWS CloudFormation (p. 116) template that assigns values
to properties not available until runtime. These functions follow the format
Fn::Attribute, such as Fn::GetAtt. Arguments for intrinsic functions can be
parameters, pseudo parameters, or the output of other intrinsic functions.
IP address A numerical address (for example, 192.0.2.44) that networked devices use
to communicate with one another using the Internet Protocol (IP). All EC2
instance (p. 129)s are assigned two IP addresses at launch, which are directly
mapped to each other through network address translation (NAT (p. 141)):
a private IP address (following RFC 1918) and a public IP address. Instances
launched in a VPC (p. 114) are assigned only a private IP address. Instances
launched in your default VPC are assigned both a private IP address and a public
IP address.
IP match condition AWS WAF (p. 121): An attribute that specifies the IP addresses or IP
address ranges that web requests originate from. Based on the specified IP
addresses, you can configure AWS WAF to allow or block web requests to AWS
resource (p. 148)s such as Amazon CloudFront (p. 110) distributions.
ISP See internet service provider.
issuer The person who writes a policy (p. 144) to grant permissions to a
resource (p. 148). The issuer (by definition) is always the resource owner. AWS
does not permit Amazon SQS (p. 113) users to create policies for resources they
don't own. If John is the resource owner, AWS authenticates John's identity when
he submits the policy he's written to grant permissions for that resource.
136
To Next Page
Loading...