B. Ramamurthy
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Elastic IP
1
AMI
Volumes
Instance
1
1
0..*
1
0..*
1
0..*
Snapshot
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S3: accessing s3, working with S3: command line
as given in the blue book or through aws console
You can create directories: your own namespace
You can transfer with a click of a button data in
and out of S3 (lets check it out)
You can simply continue to shove data into
Amazon S3 without having to worry about ever
running out of space!
Short-term and long-term backup facility.
Access to S3 is via web services and not via file
system: so relatively slow.
See demo
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You want to create an “instance” of a server from an
already established “AMI: Amazon Machine Image”
It has a elastic IP for the whole world to interact with
it.
How to control access to this?
While creating the instance, create a new security
group that will specify the policy or “rules” about the
access methods
Security group is somewhat similar to network
segment protected by a firewall
Once the server is started you cannot change the
security group: so plan ahead
See Demo
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Availability zones are analogous to a physical data
center.
Amazon keeps adding availability zones: US East
(Virginia), US East (N. California), EU West (Ireland),
Asia (Singapore)
Am important feature is that zones have different
characteristics that no two zones will be down at any
time.
You can spread your data between two zones or
replicate it in 2 or more zones for survivability.
Traffic (bandwidth) between zones cost money.
You may want to launch in the same zone if
bandwidth is your concern; but if redundancy is your
quest, you may need different zones
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Access to an instance is (for ssh) is through a
key pair. Another enabling technology is PKI
You generate a private-public key pair, store
the private key in your local hard drive, the
public key is passed to the instance when it is
launched.
EC2 instance is configures such that root
account is accessible to any user with the
private key.
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By default when you launch a new instance
amazon dynamically assign a private and a public
IP.
While this is fine for development purposed, for a
real launch of a web accessible service, we need
static IP.
Amazon makes available what are classes elastic
IPs for this purpose. Up to 5 elastic IPs can be
assigned to an instance.
Elastic IPs cost money even if you don’t use
them; assigning and reassigning strains the
system; so it cost money
Allocate elastic ip and associate it with an
instance.
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Snapshot is for saving a volume (of storage)
is a feature of Amazon’s elastic block
storage.
You can take a snapshot as often as needed.
EC2 automatically saves the snapshots to S3,
thus enabling a quick and powerful backup
scheme.
You can replay it by creating a volume from
snapshot. See demo.
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You can use already existing AMI to bootstrap
your system
AMI contains root file system for your image.
You will have clean up all your files and store
them in S3 or snap shot them so that they
can be replayed.
Stop the sql server
Name it and create it with a description.
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1.
2.
3.
4.
5.
Data-intensive Data structures: HDFS.
Data-intensive Algorithms: MapReduce.
use it in a scenario given below.
Cloud architectures: AWS: EC2, S3, +
Google App engine, AWS (Chapter 1,2 in
bluebook)
Enabling Technologies: infrastructure
realization: Virtualization, infrastructure
management
Project 1 and Lucene:
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