1 PlanetLab: A globally distributed testbed for New and Disruptive Services CS441 Mar 15th, 2005 Seungjun Lee

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Presentation transcript:

1 PlanetLab: A globally distributed testbed for New and Disruptive Services CS441 Mar 15th, 2005 Seungjun Lee

Overview Background PlanetLab is … Advantages Key Design Principle PlanetLab Virtual Machine Slice Creation

Background Internet is increasingly being ossified Still only best-effort packet delivery service Not much changed to IP protocol since the first design New global-scale services emerge How to develop and test such services The need of global-scale testing infrastructure

PlanetLab is … A set of Linux PCs widely-distributed A common software architecture A shared network testbed A deployment platform

Advantages Experiment at scale Experiment under real-world conditions Potential for real workloads and users Low entry cost

Key Design Principle Distributed virtualization Slice : distributed set of virtual machine resources Isolation Isolate services from each other Protect the Internet from PlanetLab

PlanetLab Virtual Machines Hardware Linux Vserver Service 1 Vserver Service 2 Vserver Service 3 Vserver Service 4 Vserver Service n Combined Isolation and Application Interface + Resource Isolation + Safe Raw Sockets + Instrumentation

PlanetLab Network Architecture Node manger (one per node) Create slices for service managers When service managers provide valid tickets Allocate resources for vservers Resource Monitor (one per node) Track node ’ s available resources Tell agents about available resources

PlanetLab Network Architecture Agents (centralized) Track nodes ’ free resources Advertise resources to resource brokers Issue tickets to resource brokers Tickets may be redeemed with node managers to obtain the resource

PlanetLab Network Architecture Resource Broker (per service) Obtain tickets from agents on behalf of service managers Service Managers (per service) Obtain tickets from broker Redeem tickets with node managers to acquire resources If resources can be acquired, start service

Slice Creation Agent Service Manager Broker

Slice Creation Service Manager Broker Resource Monitor Agent

Slice Creation Service Manager Broker Resource Monitor Agent

Slice Creation Service Manager Broker Resource Monitor ticket Agent

Slice Creation Service Manager Broker Resource Monitor ticket Agent

Slice Creation Service Manager Broker Resource Monitor ticket Agent

Slice Creation Service Manager Broker ticket Agent

Slice Creation Service Manager Broker ticket Agent

Slice Creation Service Manager Broker ticket Agent

Slice Creation Service Manager Broker ticket Agent

Slice Creation Service Manager Broker ticket Node Manager ticket Agent

Joining PlanetLab AS Users new users must register for a new account and then contact their local PI for their account to be activated. SSH private/public key pair

Q & A Mailing list : arch, announce, user