XoS “is like an elastic Fabric”

Z I/OBandwidth

Y MemoryStorage

X Compute

fn(x,y,z) You can never have

enough Customers want

Scale. made easy. Hypervisor

integration.The next convergence will be collapsing the datacenter designs into smaller, elastic form factors for compute, storage and networking.

Open Source Software - The Beginning

“Hello everybody out there using minix —

I’m doing a (free) operating system (just a hobby, won’t be big and professional like gnu) for 386(486) AT clones..”

Free Unix!

“Starting this Thanksgiving I am going to write a complete Unix-compatible software system called GNU (for Gnu's Not Unix), and give it away free(1) to everyone who can use it. Contributions of time, money, programs and equipment are greatly needed”.

Software TimelineClosed Hybrid Open

1970s-80s 1980s-90s 1990s-Present

Evolution of the Data Center

1970s 1990s 2000’s

Mainframe Scale Up Scale Out

Proprietary Proprietary Proprietary

2011++

Open Source

Evolution of the Cloud

1998 2003 2006 2008 2009

Virtualization Devops IAAS / CLOUD

Proprietary Open Source Proprietary

2008 2009 2010

Open Core Open Source

Open Compute

• Virt IO

• Hardware Management

• Data Center Design

• Open Rack

• Storage

5 Main Verticals – All Open Source

What is it?

Who is it?

Why does it exist?

To democratize hardware and eliminate gartuitous differentiation allowing for standardization across tier 1’s and ODMs.

Is your network faster today than it was 3 years ago?

Folded: Merge input and output in to one switch = 1.1 Strict-sense non blocking Clos networks (m ≥ 2n−1): the

original 1953 Clos result. 1.2 Rearrange ably non blocking Clos networks (m ≥ n). 1.3 Blocking probabilities: the Lee and Jacobaeus

approximations.

Multi-stage circuit switching network proposed by Charles Clos in 1953 for telephone switching systems. Allows forming a large switch from smaller switches…

Fat-tree (Blocking characteristics) Clos networks

Big

Dat

a

IP S

tora

ge VM Farms

Cloud

Web 2.0

Legacy

VDI

It should be…

2-3 Generations of Silicon

1G -> 100G Speed Transition

Lowest Latency with 2 tier Leaf/Spine

Data Center challenges & needs

Containing the Failure Domain No downtime – planned or

unplanned High bandwidth Automate provisioning,

change control and upgrades

Supports all use cases and applications Client-server Modern distributed apps,

Big Data Storage, VirtualizationAny hardware with Any Switch Silicon

Any OS

Driver

Routing

AnalyticsVirtual

Policy

Platform

Config

Dis-aggregated Switch

Data Center challenges & needs

Multi-tenancy with Integrated Security

Low and predictable latency

Mix and match multiple generations of technologies

Fabric Modules (Spine)

I/O M

odules (Leaf)

Spine

3 µsec Latency

Leaf

Network Disaggregation common Goals

Chassis V SplineFabric Modules (Spine)

I/O M

odules (Leaf)

Spine

Leaf

Chassis

≠ Can not access Line cards.≠ No L2/l3 recovery inside.≠ No access to Fabric.

Fabric

Control Top-of-Rack Switches

Advance L2/L3 protocols inside the Spline

Full access to Spine Switches

Fully Non-blocking Architecture

Three key Components to Fabric Design… Spine - 10 Gb Spine

switches (10Gb - 40Gb - 100Gb Spine ) verylow Oversubscription

Leaf - 1/10 Gb Non-blocking (wirespeed) leaf switches Inter-rack latency: 2 to 5 microseconds

Compute and Storage - High performance hosts (VMfarms, IP Storage, Video Streaming, HPC, Low-latency trading)

Ethernet Fabric 3 µsec Chassis V 1.8 µsec

Network Fabric

O/S Maximum 10GbE

Connections

Total Summit

X770 Units

40 GbE Ports Downlinks at

the Edge

40 GbE Ports Uplinks at the Edge

1:1 256 6 16 16

~2:1

512 8 21 11

3:1 768 10 24 8

80% Traffic East-West

Facebook Switch FabricsThe Facebook design Advantages: No dependency on the underlying physical network and

protocols. No addresses of virtual machines are present in Ethernet switches, resulting in smaller MAC tables and less complex STP layouts

No limitations related to the Virtual LAN (VLAN) technology, resulting in more than 16 million possible separate networks, compared to the VLAN's limit of 4,000

No dependency on the IP multicast traffic

Busi

ness

Va

lue

Stra

tegi

c As

set

Ethernet Fabric

Single software train

Purposed OS for Broadcom ASIcs

Modularity = High Availability

Network Operating

System

Design once, leverage everywhere.

Why

?W

hy?

How

?

Considerations 80% North-South Traffic

Oversubscription : from upto 200:1

Inter-rack latency: 75 to 150 microseconds

Scale: Up to 20 racks Client Request

+Server Response = 20% traffic

Lookup Storage = 80% traffic (inter- rack)

Non - blocking 2 tier designs optimal

ComputeCache

DatabaseStorage

Client

Response

Simple Spine(Active – Active)LAG MLAG

No LoopJust more

bandwidth!

LAG

Summit Summit Summit

Active /

Active

Simplifies or eliminates the Spanning Tree topology

Simple to understand and easy to engineer traffic Scale using standard L2/L3 Protocols (LACP,

OSPF, BGP)

Total LatencyUnder 5us

L2 L3 L2 L3 L2 L3

Simple FabricLAG

No LoopJust more

bandwidth!

LAG

Summit

Active / Active

Topology Independent ISSU Plug and Play Provisioning spines and leaves

L2 L3 L2 L3

L2 L3

Start Small; Scale as You Grow

Cluster

Leaf

Spine

Cluster Cluster

Simply add a Extreme Leaf Clusters… Each cluster is in an

independent cluster that includes servers, storage, database & interconnects

Each cluster can be used for a different type of service.

Simple repeatable design capacity can be added as a commodity.

Ingress EgressScale

Intel, Facebook, OCP, and Disaggregation

4-Post Architecture at Facebook - Each rack switch (RSW) has up to 48 10G downlinks and 4-8 10G uplinks (10:1 oversubscription) to cluster switch (CSW) Each CSW has 4 40G uplinks – one to each of

the 4 FatCat (FC) aggregation switches (4:1 oversubscription)

4 CSW’s are connected in a 10G×8 protection ring

4FC’s are connected in a 10G×16 protection ring

No routers at FC. One CSW failure reduces intra-cluster capacity to 75%.

Dense 10GbE Interconnect using breakout cables, Copper or Fiber

“Wedge”

“6-pack”

The Open Source Data CenterThe current rack standard has no

specification for depth or height. The only “standard” is the requirement for it to be 19 inches wide. This standard evolved out of the railroad switching era.

What is it? 5 projects – all completely open to lower cost and increase data center efficiency

Why does it exist? To democratize hardware and eliminate gartuitous differentiation allowing for standardization across tier 1’s and ODMs.

One RACK DesignTop of Rack Switches

Servers

Storage

Summit

Management Switch

Open Compute because it might allow companies to purchase "vanity free" You also don't have stranded ports with a spline network. Scale beyond traditional data center design, Modular datacenter construction is the future.

Outdated design only supports low density IT computing

Time consuming maintenance Long lead time to deploy additional data center

capacity

Loosely coupled

Nearly coupled

Closely coupled

The monolithic datacenter is dead.

Summit Summit

Shared Combo Ports4x10GBASE-T & 4xSFP+

100Mb/1Gb/10GBASE-T

Two RACK DesignReduce OPEX leverage a

repeatable solution from planning, configuration, installation, commissioning , full turnkey deployments and maintenance Leverage best in class servers, storage, networking and services and is uniquely positioned to create efficient, high performance modular data centers with the infrastructure to support IT

Flexible solution from planning, configuration, installation, commissioning , full turnkey deployments and maintenance

Summit

Top of Rack Switches

Servers

Storage

Summit

Management Switch

Summit

Top of Rack Switches

Servers

Storage

Summit

Management Switch

Summit Summit

Summit Summit

Eight RACK PoD DesignSummit Summit

Spine

Leaf

Summit

Top of Rack Switches

Servers

Storage

Summit

Management

Top of Rack Switches

Servers

Storage

Summit

Management

Summit Summit

Summit Summit

Summit

Top of Rack Switches

Servers

Storage

Summit

Management

Top of Rack Switches

Servers

Storage

Summit

Management

Summit Summit

Summit Summit

Summit

Top of Rack Switches

Servers

Storage

Summit

Management

Top of Rack Switches

Servers

Storage

Summit

Management

Summit Summit

Summit Summit

Spine Design Spine redundancy and

capacity Low device latency and low Performance oversubscription rates

I/O Diversity (10/25/40/50/100G)

Ability to grow/scale as capacity is needed

Collapsing of fault/broadcast domains (due to Layer 3 topologies)

Deterministic failover and simpler troubleshooting , Lossless and Lossy traffic over single converged fabric

Readily available operational expertise as well as a variety of traffic engineering capabilities

Collapsed (1-tier) Spine

Summit Summit Spine

Leaf

Storage

Summit

Management

Storage

Summit

Management

Storage

Summit

Management

Storage

Summit

Management

Storage

Summit

Management

Storage

Summit

Management

Summit Summit

4 x 72 =248 10Gs

25/50GbE NICs Allows 25/50GbE from server to switch (Mellanox, Qlogic, Broadcom)

Connectivity Connectors (SFP28, QSFP28), Optics and Cabling solutions backwards compatible

Commercial switching silicon 25Gb signaling lanes make 25/50/100GbE devices possible

VXLAN - Overlay and underlayVXLAN Tunneling

between sitesRemove Network EntropyW L2 connectivity over L3

L3 Core

VLANsXX-YY

VLANsXX-YYVXLAN

Gateway

VXLAN Gateway

VXLANGateway

VXLANGateway

L2 connections within IP overlay Unicast & multicast

Allows flat DC design w/out boundaries Simple and elastic network

Hypervisor / distributed

Virtual Switch – other end of

VxLAN tunnels

IP overlay connections established between VxLAN end-points of a tenant

Fully meshed unicast tunnels – for known L2 unicast traffic PIM signaled

multicast tunnels for L2 BUM traffic

Fabric vs. Cisco legacy architecture

Rack Blade servers

Multitier network design

E WS

N

80%

Elastic Spine-LeafSimpler Flatter

Any-to-any network

E W

80%

A fundamental change in data flows

To a Service Oriented Architecture

MLAGClient – Server ArchitectureHigh Latency

Complex

High CapEx / OpEx

Constrains Virtualization

Inefficient

STORAGEFC SAN

Converged Network: UCSA single system that encompasses: Network: Unified fabric Compute: Industry standard x86 Storage: Access options Virtualization optimized

Uplinks

Petabyte Scale Data - Data Flow Architecture at

FacebookWeb Servers

Scribe MidTierFilers

Production Hive-Hadoop ClusterOracle RAC Federated MySQL

Scribe-Hadoop Cluster

Adhoc Hive-Hadoop Cluster

Hivereplication