OPTICAL NETWORKS SUPPORTING IT SERVICES
Dimitra Simeonidou, Reza Nejabati, George Zervas
Work is carried out within IST project PHOSPHORUS and the ePhoton/ONe+ Network of Excellence
PHOTONIC NETWORKS LABORATORY
Electronic Systems Engineering Dept
University of Essex, UK
Colchester CO4 5UT
OFC 2007
IT and Communications Convergence
Information Technology

Network
Centric
Computing
and Storage
Communications
Commoditisation of Resources
From individual computers to Internet and WWW
 From specialist supercomputers to clusters
 From individual servers to virtualized, dynamically provisioned server farms
 From applications to services
 From ownership to computing on demand and Grids

ALSO


BW is becoming a commodity
Global distributed computing and storage facility
Distributed but connected resources
 Linked supercomputers
 Distributed data management
 Storage-on-demand
 Utility computing
 Collaboration Grids

OFC 2007
Motivation

Scale up computing and/or data sets

Reduce costs via capex/opex efficiencies

Reduce time-to-results

Reduce time to market for new services

Increase reliability, availability

Enable collaborations

Support a market in software services
OFC 2007
Bridging Network and IT+ Recourses
The network as a 1st-class Grid-managed resource akin to CPU and Data
Switch
Optical Path
Bandwidth
Courtesy GGF-GHPN draft-ggf-ghpn-netserv-2 (May 2005)
OFC 2007
Some Network Requirements

Coordinating on-demand, secure access to distributed and
heterogeneous resources (cpu, storage, bandwidth …)
 High

performance
Transmission quality and/or low latency
 Virtualization

abstracted network resources
 Finesse

fine granularity of control (e.g., app hints service allocation)
 Advance
reservation of service
 Resource bundling

network AND {cpu| data | etc.}
 Determinism

can predict completion
 Security
 Multicast,
Anycast
OFC 2007
The PHOSPHORUS Project:
Grid Network Service for the Scientific Users


European and Global alliance of partners to develop advanced solution of
application-level middleware and underlying management and control
plane technologies
Project Vision and Mission




The project will address some of the key technical challenges in enabling ondemand end-to-end network and IT services across multiple heterogenous
domains
In Phase I of Phosphorus implementation the underlying network will be
treated as first class Grid resource
In Phase II, the IT/Grid resource will be treated as first class network
resource
Phosphorus will demonstrate solutions and functionalities across a test-bed
involving European NRENs, GÈANT2, Cross Border Dark Fibre and GLIF
OFC 2007
PHOSPHORUS Network Scenario
Application 1
Application 2
Application n
Applications
Service
plane n
Service
plane 1
Service
plane 2
NREN+vendor 1
NREN+vendor 2
NREN+vendor n
Control
plane
NRPS
NRPS+Control
plane
Equipment
Equipment
transport+Data
transport+Data
Equipment


transport+data
OFC 2007
Multi-domain Test-bed
OFC 2007
PHOSPHORUS Architecture
The different domains of the
Phosphorus' test-bed will have:
 Grid middleware
 UNICORE as
a reference point
AAA policies
 Three types of NRPS:
 UCLP
 DRAC
 ARGON
Two “flavours” of GMPLS
 standard (Ph. 1)
 Grid-enabled (Ph. 2)
OFC 2007
PHOSPHORUS Architecture Phase 1
Grid MW
Network Service Plane
NRPS Driver
NRPS Driver
NRPS Driver
ARGON
DRAC
UCLP
GMPLS
TN
GMPLS
Task 1.1 Heterogeneous NRPSs interoperability
Task 1.2 Interoperability of NRPS and GMPLS control plane
Task 1.3 Integration of the Network Service Plane
Task 1.4 Interoperability between NRPS, GMPLS and the Service Layer
OFC 2007
PHOSPHORUS Architecture Phase 2
GOUNI (D)
API
GOUNI (S)
GOUNI (S)
GA-API
DATA
Grid Resource
Info. System
Optical
resource
GOUNI (D)
GR-API
Grid
Resource
Schedulers
Physical
layer
adaptation
Grid Resource
Optical
resource
Constraint
Based
Routing
DATA
API
Data Intensive
Application
API
User
ON-enabled Grid
Middleware
Optical
resource
Physical
layer
adaptation
Extended GMPLS (Grid-enabled)
OXC 1
OXC 2
OFC 2007
What About the Smaller User?

Need infrastructures that makes storage and computational resources
potentially available to a very large number of users.
Distributed virtual laboratories
 Digital libraries and data repositories
 Remote medicine
 Consumer services


Requirements
Capable of processing a very large amount of small jobs from a very large
number of users and processes
 Capable of managing large amounts of very heterogeneous media assets
 Cost efficient
 Compatible with professional grid services

OFC 2007
Programmable OBS Networking:

Focus is to :
 To
migrate service layer functionality into the optical layer
 Enable
service


the network to directly offer resources (network and data) as
Network elements are able to recognise and process application
demands/request
To offer resources as a service
To facilitate intelligent discovery of distributed resources across the network
 To cope with random changes user patterns, demands for resources
(BW/storage/processing) as well as availability of resources

OFC 2007
Grid OBS Network Infrastructure
Small Grid User
Computational & storage
resources
Internet User
Traditional OBS User
Computational & storage
resources
OBS Edge Router
Computational & storage
resources
OBS Core Router
Active OBS Router
Scientific User
OFC 2007
Demonstration of a Fully Functional
Application Aware OBS Testbed
Core Node
Edge Node
Resource Discovery
IP
P
A
R
S
E
R
OBS
C
o
S
IP-Traffic
Generator
Scheduling
Aggregation
S
I
G
N
A
L
I
N
G
OBS @ 2.5Gbps
OBES
Control
Channel
@ 2.5Gbps
Data
Channels
S
I
G
N
A
L
I
N
G
Resource
Management
Scheduling
OBS Routing
Edge Node
S
I
G
N
A
L
I
N
G
OBES
Control
Channel
@ 2.5Gbps
Data
Channels
S
I
G
N
A
L
I
N
G
Resource Discovery
IP
OBS
Scheduling
Segregation
OBS @ 2.5Gbps
C
o
S
IP-Traffic
Generator
OWC2. A Fully Functional Application-Aware Optical Burst Switched Network Test-Bed,
Wed 8-10 am, session: OP/OBS
OFC 2007
P
A
R
S
E
R
Edge Router 1 Output
Edge Router Rx :
Req IP
13.6 dB
λ4 OBES Control Plane
a)
λ5
?5
Job
Core Router Rx :
Req OBES
Job
Edge Router 1
λ6
?6 λ7
?7
Edge Router Rx :
Job Req OBES Ack
400 us/div
200 ns
OXS Output Port 1
Edge Router Tx:
of Job Sub
Switch Control
12.8 dB
BCH
Data
Port
1
Plane
Core Router:
Switch Configuration
OXS Output Port 2
Switch Control
Core Router Rx: Burst
of Job Sub
200ns + 200ns
400 + Time t (varies)
400ns +Time t + 200ns
400ns +Time t + 200ns + 10 µs
Data Plane
OFC 2007
A Scalable Service Plane for Consumer Grids

Use SIP in the “middleware”


SIP protocol is used in consumer services


Session oriented Grid service platform
Extend GRID services to the consumer base
Incorporating Grid attributes to SIP

Users


Resources


Web Service Resource Framework (WSRF)
Application requiring job management?

Create a SIP session

Use SIP messages to




Job Submission Description Language (JSDL)
Submit job description
Acknowledge resources availability
Open/close connections
GRID features

Resource discovery and reservation
In Collaboration with University of Bologna: Franco Callegati & Aldo Campi
OFC 2007
What Have we Done?

Overlay
 SIP



Simple solution
Grid functionality at the OBS network periphery only
Proxy SIP-G manage the GRID messages



in the edge nodes
Users
Resources
Transport network
 Optical
Burst Switching, 2.5 Gbit/s
In Collaboration with University of Bologna: Franco Callegati & Aldo Campi
OFC 2007
Test-Bed
SIP Control Channel
Grid-aware SIP Proxy
Grid-aware SIP Proxy
SIP-OBS Middleware
SIP-OBS Middleware
Core Node
Edge Node 1
Resource Discovery
IP
P
A
R
S
E
R
OBS
C
o
S
IP-Traffic
Generator
Scheduling
Aggregation
S
I
G
N
A
L
I
N
G
OBES
Control
Channel
@ 2.5Gbps
Data
Channels
S
I
G
N
A
L
I
N
G
Resource
Management
Scheduling
OBS Routing
Edge Node 2
S
I
G
N
A
L
I
N
G
OBES
Control
Channel
@ 2.5Gbps
Data
Channels
OBS @ 2.5Gbps
S
I
G
N
A
L
I
N
G
Resource Discovery
IP
OBS
Scheduling
Segregation
OBS @ 2.5Gbps
C
o
S
P
A
R
S
E
R
IP-Traffic
Generator
•Overlay network architecture utilizing SIP over OBS.
•It incorporates two OBS Edge Routers equipped with Grid-aware SIP Proxies on top
and one Core Router
•The Test-bed operates in full-duplex mode.
In Collaboration with University of Bologna: Franco Callegati & Aldo Campi
OFC 2007
Call flow (1/2)

JSDL document encapsulated into a SIP message

The message is sent to the SIP server in the edge router

The server

Reads the JDSL and process the job submission


Provides the discovery of the resource according to the JSDL



Ad hoc module developed
In the experiment a database of resources location is already available at the proxy
Forwards the request to the proxy in the edge router connected to the resources
The session is established


The proxy server communicate with the GMPLS layer and notify the session establishment to
the OBS network
The data of the job are collected to the optical network encapsulated into burst
In Collaboration with University of Bologna: Franco Callegati & Aldo Campi
OFC 2007
Call flow (2/2)
Grid-aware SIP Proxy
Edge router 1
User
Core router
Grid-aware SIP Proxy
Edge router 2
Resource
SIP messages over Ethernet
INVITE
•
•
200 OK
ACK
OBS messages (Optical network)
TE1
•
Data
BCH
TC1
TO1
•
BCH
Burst data (actual job)
Data
TE2
BCH
TC2
Data
INVITE message with JSDL
incapsulated, T_SIP_1 = 0,016s
Acknowledgment (ACK) message
T_SIP_2=0,041s
•
•
Data
TO2
BCH
Burst data (job result)
BYE
T edge 1.1: user acknowledgment, job
submission, aggregation and trasmission
over OBS (Time is veriable and depends
on incomming traffic and burst size)
T care 1 & 2: BHC processing and
reinsertion, 200ns
T edge 2.2 : processing of incomming
actual job and result trasmission over
OBS (Time depends on processing time)
Ofset 1 & 2 : Required to implement JIT
transport protocol, BCP processing time
at core switch and setup time of optical
corosspoint switch (OXC)
SIP messages over Ethernet
•
End session
200 OK
In Collaboration with University of Bologna: Franco Callegati & Aldo Campi
OFC 2007
OBS Testbed
Active-OBS Router
Tunable
Laser
Core Router Control
FPGA
Optical Cross-Point Switch
Edge OBS Router 1
Edge OBS Router 2
Edge OBS Router Test-bed
Complete application-aware OBS Testbed
OXS control
OBS core control
Computational
& Network
Resource
Manager
Optical CrossPoint Switch
(OXS)
Core Active-OBS Router Setup
OFC 2007
ECOC WORKSHOP:
Networks for IT: A New Opportunity for Optical Network Technologies
Berlin, Sunday, September 16, 14:00- 18:00
Organised by ePhoton/ONe+ and PHOSPHORUS
OFC 2007