Distributed Compute. Hans-Juergen Schmidtke Director of Network Hardware Engineering FACEBOOK
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3 Distributed Compute Hans-Juergen Schmidtke Director of Network Hardware Engineering FACEBOOK
4 100 Million Hours of video watched on Facebook daily 95+ Million Photos and videos posted to Instagram daily 400 Million Voice and video chat on Messenger monthly
5 Prineville, OR Forest City, NC Luleä, Sweden Altoona, IA Huntsville, AL Fort Worth, TX Clonee, Ireland Los Lunas, NM Odense, Denmark Eagle Mountain, UT Papillion, NE New Albany, OH Henrico, VA Newton County, GA Singapore
6 Luleå, Sweden Altoona, IA Clonee, Ireland Papillion, NE Prineville, OR New Albany, OH Henrico County, VA Odense, Denmark Eagle Mountain, UT Los Lunas, NM Forest City, NC Newton County, GA Huntsville, AL Fort Worth, TX Singapore 4G Connections 3G Connections 2G Connections
7 VR / AR VIDEOS PHOTOS TEXT
8 The demands of Facebook Let us have a closer look at the traffic pattern The Italian Movie Machine to Machine Machine to Person
9 Workload: Example of server traffic patterns Prediction of resources for CPU, Flash and I/O Flash difficult Flash utilization at times fairly low Requires scaling of Compute, Storage and Network resources independently Dilemma: Utilization of dense flash devices require more compute clients than what fits in one rack
10 Approaches for DC Optimization Resources to be optimized for: People Scale Power Thermal / Airflow Space Decisions to be balanced: Operations over Feature Scale out vs. Scale up SW and HW Commodity over specialization, use or enable economy of scale Economical deployment Time
11 OCP 2011 TIP 2016 Hardware Disaggregation End-to-end Solutions Open Interfaces / Community Collaboration Implementations
12 Storage ( HDD / Flash ) Bryce Canyon Lightning
13 Memory Tioga Pass Dual-Socket CPU Sled Tioga Pass Chassis
14 Compute Twin Lakes Server Card Yosemite V2 Chassis
15 DATA CENTER COMPUTE STORAGE MEMORY ML / AI ACCELERATOR NETWORK
16 CPU Performance: Demand and Supply. Expectation and Experience Relative Performance Increase What was What is The Gap Sources for: Yellow Line: Wikipedia CPU Generation (Baseline 2012) Experience Expectation Source for Blue Line: Composite of SpecInt Rate Scores mapped against TDP / W from a variety of mainstream processors since Intended to represent an industry norm, not any particular product or supplier.
17 Supply: HDD Real Capacity per HDD vs. Kryder's Law Throughput per Terabyte Declining BW/TB IN MBPS/TB TB 10TB 12TB 14TB 16TB IPOS/TB TB/HDD CUMULATIVE GROWTH RATE KRYDER'S RATE (CUMULATIVE) BW/TB (BS=8m, QD=32) IOPS/TB (BS=128K, QD=32) HDD storage not increasing much I/O challenge becoming apparent Sources for: Kryder Kryder, Mark H.; Chang Soo Kim (October 2009). "After Hard Drives - What Comes Next?" (PDF). IEEE Transactions on Magnetics. 45 (10). doi: /tmag Source for Throughput per Terabyte: Facebook composite of random (IOPS/TB) and sequential (BW/TB) IO scores, across a variety of mainstream products originating since 2014, and forward-projected into Intended to represent an industry norm, not any particular product or supplier.
18 Dilemma of scaling up and wide Year Throughput SERDES Ideal optical speed System power Prediction T 25G 100G 100G T 25G 200G 100G Estimates T 50G 400G 100G T 50G 800G 200G T 100G 1.6T 400G >2000W Challenge of optical manufacturing Challenge of SERDES scale Challenge of Chip edge I/O Challenge of Power T 100G/200G 3.2T 400G? >2500W Optics Running 1-2 Generations Behind Power Limit
19 Demand vs. Supply Exponential demand meets reduced technology supply Technology work-arounds not trivial e.g. making dies larger Manifests itself in power challenges Breaking: Optical supply Options how to deal with demands e.g. Topology and protocol optimization Balance of high vs. wide ASIC dedicated HW for specific applications
20 Examples for approaches Topology optimization, resource distribution, disaggregation Component development co-packaged optics Scale out of Fabric Aggregator
21 Topology optimization, resource distribution, disaggregation Defined resources CPU Flash Flash Flash Disaggregated CPU Flash Flash Flash Flash Flash
22 Topology optimization, resource distribution, disaggregation Non-aggregated CPU Flash Flash Flash Disaggregated CPU Flash Flash NIC NIC Flash Flash Flash Network
23 Co-packaged optics = Opto electronics
24 Datacenter Power Servers and Network Power is a shared resource + =
25 Power efficiency for today s switch and optical generation Percentage of Network Power Per Function Power for Optical Optical 11% 18% Input/Output and Switch Switch I/O 4% Input/Output is around Optical I/O 11% 20% of the total power Switch Functions Fan Tray 15% Design Goals: Reduced total link CPU Misc 5% power consumption Overcome SI limits of 36% electrical links to edge of card
26 Co-packaged optical solutions Conventional pluggable optics not scalable On-board optics Co-packaged optics Wafer level integration/test Packaging challenge to wafer Better process control
27 Benefits of co-packaged optics Enables higher density, lower power, and lower cost
28 Co-packaged optics with ASIC Substrate + BGA Switching chip die Photonic die Electric-die Silicon substrate
29 Scale out Fabric Aggregation
30 Traffic flow in to network People FNA FNA Facebook Network Appliance POP#1 POP#2 Points of Presence Backbone Region 1 Region 2
31 Role of fabric aggregation layer Backbone AGG node #1 AGG node #2 AGG node #n Fabric Aggregation layer Data Center Fabric #1 Data Center Fabric #2 Data Center Fabric #N
32 The solution: Fabric Aggregator
33 Integrating disaggregated building blocks Wedge 100S
34 Integrating disaggregated building blocks + = Wedge 100S
35 Cable backplane options PIG-TAIL AOC CWDM4 PSM4 DAC
36 Industry wide implications Telco Datacenter Hyperscale
37 Summary Supply does not meet workload demand Solutions being worked on: Topology optimization, resource distribution including compute disaggregation, flash disaggregation Component development co-packaged optics Scale out of networks FA & next generation fabrics Industry-wide implications Any e2e cloud architecture can make use of tech
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