Please enable JavaScript.

Coggle requires JavaScript to display documents.

AWS Services (Compute (Amazon EC2 (Networking (Elastic IP (To retain IP…

- - - - resizable compute capacity
      - Limit-20 on-demand instances
        
        purchasing 20 reserved instances
        
        requesting spot instances per your dynamic spot limit per region.
      - supported OS
        
        Amazon Linux
        
        Ubuntu
        
        Windows Server
        
        Red Hat Enterprise Linux
        
        SUSE linux Enterprise Server
        
        Fedora
        
        Debian
        
        CentOS
        
        Gentoo
        
        Linux
        
        Oracle Linux
        
        FreeBSD
      - Key Pairs
        
        public key that AWS stores
        
        private key file that we store
        
        for Windows AMI-private key is needed for get password to get into instance
        
        for Linux AMI, private key-securely SSH into your instance
      - Metadata and Userdata
        
        data provided by user at instance launch as script
        
        Metadata-data about instance used configuration of instance
        
        userdata-16KB limit
        
        not encrypted
        
        Instance meta data query tool helps get instance metadata with typing URI
    - - On demand
        
        pay for hours used & no commitment
        
        low cost and flexibility with no upfront cost
        
        Ideal for auto scaling and unpredictable workloads
        
        good for dev/test
      - Spot
        
        Excess EC2 capacity that AWS tries to sell on a market exchange basis
        
        Very low hourly compute cost
        
        Ideal for grid computing and HPC
        
        Flexible start and end times
        
        Customer create spot request
        
        Specifies AMI,desired instance types, other key information
        
        Customer defines highest price they are wiling to pay for an instance. If capacity is constrained and others are willing to pay more, your instance might get terminated or stopped
        
        Charged by hour unless AWS terminates-then free
        
        Spot Request
        
        Fill and Kill
        
        Maintain
        
        Duration-based
        
        One-time Request
        
        instance is terminated
        
        ephemeral data is lost
        
        Request and Maintain-instance can configured
        
        Terminate
        
        Stop
        
        Hibernate
        
        Cannot use encrypted volumes
      - Reserved
        
        Purchase usage of EC2 instance in advance for significant discount over On-demand pricing
        
        Provides capacity reservation when used in specified AZ
        
        AWS Billing automatically applies discounted rates when you launch an instance that matches your purchased RI
        
        Reserved for Term-1 or 3 years
        
        RI Types
        
        Standard
        
        1 or 3 years charged whether on or off
        
        Convertible
        
        Scheduled
        
        specific period of time
        
        accrue charges hourly
        
        billed in monthly increments over the term(1 year)
        
        match your capacity reservation to a predictable recurring schedule
        
        used for steady workloads and predictable usage
        
        ideal for application that need reserved capacity
        
        upfront payments can reduce hourly rate
        
        can switch AZ within same region
        
        can change instance size within same instance type
        
        instance type modification-supported for linux only
        
        Cannot change instance type in Windows RIs
        
        Billed whether running or not
        
        Can sell reservation on AWS marketplace
        
        Can used in Autoscaling groups
        
        used Placement Groups
        
        Can be shared across multiple accounts within consolidated billing
        
        Sell RI on Reserved Instance Marketplace
    - - Data
        
        Heavy Data Usage eg: File Servers, DWs
      - RAM
        
        Memory Optimized
      - MAIN
        
        General Purpose eg:app server
      - COMPUTE
        
        Compute Optimized
      - GRAPHICS
        
        Graphics Intensive Workloads
      - IOPS
        
        Storage I/O optimized(NoSql, DWs)
      - FAST
        
        FPGA hardware Acceleration
      - CHEAP
        
        Lowest cost(T2-micro)
      - GPU
        
        GPU requirements
      - EXTREME RAM
        
        Heavy Memory Usage(SAP HANA, Apache Spark)
      - High Memory
      - High Compute and Memory
      - High Disk Throughput
    - - Public IPV4 address-Lost when instance stopped
      - Private(IPV4 and IPV6) are retained
      - Elastic IP
        
        To retain IP address after instance is stopped
        
        Charged for not using
        
        available in specific region only
        
        custom tags to Elastic IP to categorize them
        
        DNS records can be configured by filling out a form
        
        associate single private(IPv4) address with a single elastic IP address and vice versa
        
        when secondary private address is unassigned from an interface, the associated Elastic IP address is disassociated.
      - EC2 come with private IP by default
      - Public Subnet-Public IP address
      - Public IP addresses are always assigned for EC2 Classic instances
      - Sceondary IP addresses can be useful for hosting multiple websites on a server or redirecting traffic to a standby EC2 instance for high availability
      - choose whether secondary IP address can be reassigned
      - You can assign or remove IP address from EC2 instances while they are running or stopped
      - All IP address remain attached to network interface when detached or reassigned to another instance
      - can attach a network interface to instance-different subnet as long as its within same AZ
      - Eth0-primary network interface-cannot be moved or detached
      - IP address can be specified within subnet or leave it to be auto-assigned
      - ENI(Elastic Network Interface)
        
        Cannot team by adding ENIs(Elastic Network Interface) to an instance
        
        ENI-AZ and can specify which subnet/AZ you want ENI to be added
        
        add only one extra ENI when launching but more can be attache d later
        
        ENIs can be hot attached-running instances
        
        ENIs can warm attached-stopped instances
        
        ENIs can cold attached-instance launched
        
        Can have
        
        1 primary IPv4 address
        
        One or more secondary IPv4 addresses
        
        One Elastic Ip address corresponding to each IPv4 address(via NAT)
        
        One public IPv4 address
        
        one or more Ipv6 addresses
        
        Up to 5 security groups
      - If you add a second interface AWS will not assign a public IP address to eth0
      - Default interfaces are terminated with instance termination
      - Manually added interface are not terminated by default
    - - higher bandwidth, higher packet-per-second(PPS) performance,consistently lower inter-instance latencies
      - if PPS rate have reached its ceiling, you should consider moving to enhanced networking bcoz you are likely to reach upper threshold of VIF driver
      - SR-IOV
        
        direct access to network adapters
        
        higher pps
        
        lower latency
      - Must launch am HVM AMI with appropriate drivers
      - Only available for certain instance types
      - only supported in VPC
      - Network Limits :
    - - Clusters
      - Spreads
        
        reduces risk of simultaneous failures that might occur when instances share the same underlying hardware
        
        applications that benefit from low latency and high bandwidth
        
        Recommended to use an instance type that supports enhanced networking
        
        Instances within a placement group can communicate with each other using private or public IP address
        
        Best performance is achieved when using private IP addresses
        
        Using