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themblem/doc/11b.md
Fam Zheng 32171d11f3 doc: add 11b
2026-01-05 20:47:19 +00:00

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Project 11b - Hardware Specification v0.1

1. Requirements

Annual amount of data: 11 billion QR codes, each 50kb - 200kb.

  • Total storage: 550 TB - 2.2 PB per year
  • Import window: 1/20 to 1/10 of year (18-36 days)
  • Write throughput: 3,480 - 6,960 QR codes/sec sustained
  • Data rate during import: 348 MB/s - 1.39 GB/s sustained
  • Peak burst (3x): up to 21K QR codes/sec, 4 GB/s

Solution: 13 storage + 3 control/compute + 1 import node (JBOD + 3-replica, SINGLE RACK)

  • Usable capacity: 2.29 PB (covers ALL 11B QR codes at maximum 200KB size)
  • Raw capacity: 6.86 PB (24 × 22TB × 13 storage nodes)
  • Aggregate IOPS: ~1.25M (96K per node × 13, adequate for sequential QR storage)
  • Aggregate throughput: 39 GB/s read, 19.5 GB/s write (exceeds 1.39 GB/s requirement)
  • Redundancy: 3x replication (JBOD, software-managed, can tolerate 10 node failures)
  • Hardware (Lenovo + Huawei, RECOMMENDED):
    • 13x Lenovo ThinkSystem SR650 V2 storage nodes (24x 22TB SAS each)
    • 3x Lenovo ThinkSystem SR630 V2 control/compute nodes (multi-purpose)
    • 1x Lenovo ThinkSystem SR650 V2 import node (front-panel hot-plug: USB/NVMe/SATA/SAS)
    • 2x Huawei CloudEngine 6800 switches (48-port 25GbE)
  • Import capability: 10-32 GB/s physical media import (no internet bottleneck)
  • Cost (China, Lenovo+Huawei): ¥1,973,000 CapEx (~$274K USD)
  • Note: UPS excluded (out of project scope). Pricing based on Lenovo China and Huawei public pricing.
  • Fits in: Single 42U rack (35U used, 7U for expansion)

2. Hardware Configuration

Vendor: Lenovo (RECOMMENDED for China deployment)

  • Servers: Lenovo ThinkSystem SR650 V2 and SR630 V2
    • Global brand with excellent China presence
    • 20-25% cheaper than Dell in China market
    • Same Intel Xeon CPUs, enterprise-grade quality
    • Public pricing available: ~¥95,000-120,000 per configured node
  • Networking: Huawei CloudEngine 6800
    • Industry-leading in China market
    • Public pricing: ~¥90,000 per 48-port 25GbE switch
    • Better integration with China networks (China Telecom/Unicom/Mobile)
  • Management: Lenovo XClarity Controller (IPMI/Redfish standard)
  • Support: Lenovo China 4-hour onsite response
  • Drives: Seagate Exos or WD Ultrastar (assembled in China, no import VAT)

2.1 Rack Layout (SINGLE 42U Standard Rack)

Complete Deployment in One Rack (13 storage + 3 control/compute + 1 import node)

  • U1-U2: 2x Huawei CloudEngine 6800-48S-EI switches (48-port 25GbE, redundant, CSS)
  • U3-U4: 2x Domestic PDUs (20x C13, 4x C19 outlets, 208V 3-phase, A+B feeds)
  • U5-U30: 13x Storage nodes (2U each, Lenovo ThinkSystem SR650 V2 with 24x 22TB SAS)
    • 2.29 PB usable (covers all 11B QR codes at max 200KB size)
  • U31-U33: 3x Control/Compute nodes (1U each, Lenovo ThinkSystem SR630 V2, multi-purpose)
    • Runs: Ingestion workers, API servers, load balancers, control plane
    • All services on all 3 nodes for redundancy
  • U34-U35: 1x Import node (2U, Lenovo ThinkSystem SR650 V2, front-panel hot-plug for physical media)
    • USB 3.2 / NVMe / SATA / SAS hot-plug bays
    • Direct physical media import (no network bottleneck)
  • U36-U42: Reserved for future expansion (7U available)

Total rack space used: 35U of 42U

2.2 Network Design

Top-of-Rack Switches:

  • Model: Huawei CloudEngine 6800-48S-EI (RECOMMENDED)
    • 48x 25GbE SFP28 ports + 6x 100GbE QSFP28 uplink ports
    • 2x redundant PSU (AC/DC)
    • 2x redundant fans
    • VRP OS (Huawei Versatile Routing Platform)
    • Public pricing: ~¥90,000 per switch in China
    • Industry-leading in China market, 25% cheaper than Dell
  • Configuration:
    • CSS (Cluster Switch System) pair for redundancy
    • LACP bonding for all server connections (2x25GbE per node)
    • VLANs: Management (VLAN10), Storage (VLAN20), API (VLAN30)
    • Jumbo frames enabled (MTU 9000)

Uplink:

  • 2x 100GbE fiber to core/distribution switches
  • ECMP routing for load distribution

Cables:

  • DAC (Direct Attach Copper) Twinax for intra-rack (< 5m)
  • OM4 MMF or SMF for inter-rack connections

2.3 Power Design

Power Requirements (Single Rack - With Import Node: 13 storage + 3 compute + 1 import):

  • Storage nodes: 13 nodes × 500W = 6,500W (HDDs use much less power than NVMe)
    • Each HDD: ~10W idle, ~12W active
    • 24 HDDs per node: ~300W
    • CPU + RAM + fans: ~200W
  • Control/Compute nodes: 3 nodes × 600W = 1,800W
    • Multi-purpose nodes running all services
    • Higher CPU utilization but consolidated
  • Import node: 1 node × 700W = 700W
    • Higher power due to NVMe staging drives + multiple controllers
    • Peak during import operations
  • Network switches: 2 switches × 400W = 800W
  • Total: ~9,800W = 9.8 kW
  • With 30% headroom: 12.7 kW single rack

Power Summary:

  • Storage nodes: 6.5 kW (13 nodes × 500W)
  • Control/Compute nodes: 1.8 kW (3 nodes × 600W)
  • Import node: 0.7 kW (1 node × 700W)
  • Network switches: 0.8 kW (2 switches × 400W)
  • Total: 9.8 kW (12.7 kW with 30% headroom)

PDU Configuration (Single Rack - 13 Storage Nodes):

  • 2x Domestic Metered Rack PDU (redundant feeds, A+B power)
    • Input: 208V 3-phase, 30A per PDU
    • Capacity: 208V × 30A × 1.732 = 10.8 kVA per PDU (3-phase)
    • Total: 21.6 kVA for rack (sufficient for 12.7 kW load with headroom)
  • Each server: Dual PSU connected to separate PDUs (A+B feeds)

Cooling (Single Rack - With Import Node, 13 Storage Nodes):

  • Heat dissipation: 12.7 kW × 3.41 = 43,307 BTU/hr (single rack)
  • Requirement: Cooling capacity for 43,400 BTU/hr (~3.6 tons)
  • Options:
    • Use existing IT room CRAC/HVAC (if capacity available)
    • Add 1x 20kW in-row cooling unit (¥40,000-50,000)
    • Standard precision AC unit (4-5 ton capacity)
  • No special containment needed for single rack

2.4 Storage Node Specifications

Storage Capacity Planning:

  • Maximum requirement: 2.2 PB per year
  • Replication strategy affects raw capacity needs:
    • RAID 10 + 2x replication: 4.4 PB raw (complex, dual-layer redundancy)
    • JBOD + 3x replication: 6.6 PB raw (simpler, software-only redundancy)

Architecture Choice: JBOD vs RAID

JBOD + 3-replica (RECOMMENDED for software simplicity):

  • No RAID controller complexity
  • Software handles all redundancy (Ceph, MinIO, etc.)
  • Each drive independent, easier failure recovery
  • Better performance observability
  • Standard approach for distributed storage
  • Easier rebalancing and maintenance

RAID 10 + 2-replica (traditional approach):

  • Hardware RAID provides local redundancy
  • Lower network replication traffic
  • Faster local reads (RAID striping)
  • More complex failure scenarios (RAID + cluster)
  • RAID rebuild overhead on drive failure

Storage Node: 13 nodes with 22TB SAS HDD + JBOD + 3-replica (covers all 11B QR codes)

Model: Lenovo ThinkSystem SR650 V2 (2U, 24x 2.5" drive bays) Public pricing: ~¥95,000-105,000 per configured node in China

Per Storage Node:

  • CPU: 2x Intel Xeon Silver 4316 (20 cores, 2.3 GHz, 30MB cache)
    • Total: 40 cores, 80 threads per node
    • Part#: 4XG7A42589
  • RAM: 256 GB DDR4-3200 ECC RDIMM (8x 32GB)
    • Part#: 4X77A08633 or equivalent
  • Boot: 2x 480GB SATA SSD (RAID 1, OS)
    • Lenovo 2.5" 6Gb SATA SSD
  • Storage: 24x 22TB SAS HDD 12Gbps 7.2K RPM
    • Seagate Exos X22 (ST22000NM00 series) or WD Ultrastar
    • Public pricing: ¥2,800-3,200 per drive ($390-445)
    • JBOD configuration (no RAID, all drives independent)
    • Per node: 528 TB raw (24 × 22TB)
    • Total cluster: 6.86 PB raw (13 nodes × 528 TB)
    • With 3x replication: 2.29 PB usable
    • Performance: 4K IOPS per drive, ~96K IOPS per node, 1.5 GB/s per node
  • Network: 2x Lenovo ThinkSystem Broadcom 57504 25GbE (4-port, bonded)
  • HBA: Lenovo ThinkSystem 430-8i SAS/SATA 12Gb HBA (pass-through mode)
  • PSU: 2x 1100W Platinum (redundant, 208V)
  • Rack space: 13 nodes × 2U = 26U

2.5 Import Node Specifications (1 node, dedicated for physical media import)

Model: Lenovo ThinkSystem SR650 V2 (2U, front-accessible hot-plug) Public pricing: ~¥140,000 per configured node

Per Node:

  • CPU: 2x Intel Xeon Gold 6338 (32 cores, 2.0 GHz, 48MB cache)
    • Total: 64 cores, 128 threads
    • High core count for parallel import processing
  • RAM: 256 GB DDR4-3200 ECC
    • Large buffer for staging imported data
  • Boot: 2x 480GB SATA SSD (RAID 1, OS)
  • Import staging storage: 4x 7.68TB NVMe (JBOD)
    • Total: ~31TB staging buffer
    • High-speed local cache before copying to storage cluster
  • Hot-plug bays (front panel): 12 bays supporting:
    • USB 3.2 Gen 2x2: 4x front-panel USB-C ports (2.5 GB/s each)
    • NVMe U.2: 4x hot-swap NVMe bays (up to 8 GB/s per drive)
    • SATA/SAS: 4x hot-swap 3.5" bays (12 Gbps SAS)
  • Controllers:
    • Lenovo ThinkSystem 430-8i SAS/SATA HBA (pass-through mode)
    • PCIe Gen4 NVMe switch
    • USB 3.2 Gen 2x2 controller
  • Network: 2x 25GbE (bonded, LACP)
  • PSU: 2x 1100W Platinum

Import Workflow:

  1. Operator inserts physical media (USB, NVMe, SATA, SAS) into front panel
  2. Drive auto-mounts or hot-detects
  3. Import software reads data from media → staging NVMe (fast local)
  4. Processes/validates QR codes in parallel (32-48 cores)
  5. Streams validated data to storage cluster over 25GbE (or 100GbE)
  6. Operator removes media when import complete (LED indicator)

Performance:

  • USB 3.2: 4 ports × 2.5 GB/s = 10 GB/s aggregate
  • NVMe: 4 drives × 8 GB/s = 32 GB/s aggregate
  • SATA/SAS: 4 drives × 1.5 GB/s = 6 GB/s aggregate
  • Network: 2x 25GbE = 6.25 GB/s to storage cluster
  • Staging NVMe: 31TB buffer allows offline processing before network transfer

Benefits:

  • No internet/WiFi bottleneck: Direct physical media import at full speed
  • Parallel import: Accept up to 12 drives simultaneously
  • Flexible media: USB, NVMe, SATA, SAS all supported
  • High throughput: Local staging eliminates network bottleneck during read
  • Operator-friendly: Front-panel access, LED indicators, hot-plug safe

2.6 Control/Compute Node Specifications (3 nodes, consolidated)

Model: Lenovo ThinkSystem SR630 V2 (1U, multi-purpose) Public pricing: ~¥102,000 per configured node

Per Node (runs ALL services):

  • CPU: 2x Intel Xeon Gold 6338 (32 cores, 2.0 GHz)
    • Total: 64 cores, 128 threads per node
    • Sufficient for ingestion + API + control plane + load balancing
  • RAM: 256 GB DDR4-3200 ECC (8x 32GB)
    • Split: 128GB for ingestion, 64GB for API, 64GB for system/control
  • Boot: 2x 480GB SATA SSD (RAID 1, OS)
  • Local storage: 2x 3.84TB NVMe
    • Ingestion write buffer + API read cache + monitoring data
  • Network: 2x Lenovo ThinkSystem Broadcom 57504 25GbE (bonded, LACP)
  • PSU: 2x 800W Platinum

3. Network Topology

Core Switch (100GbE uplink)
  ↓
Rack ToR Switches (Dell VLT pair, 25GbE to servers)
  ↓
Dell Servers (dual-homed, LACP bonded)

4. Cost Estimate (Approximate)

Hardware (Single Rack - 13 storage + 3 control/compute + 1 import for FULL 2.29 PB):

  • Storage nodes (13x): $195K
  • Control/Compute nodes (3x): $48K
  • Import node (1x): $22K
  • Network switches (2x): $30K
  • Other hardware & infrastructure: $13K
  • Total: $308K CapEx
  • Note: UPS excluded (out of project scope)

Power Requirements:

  • Total rack power: 9.5kW maximum
    • 13x storage nodes @ 400W each = 5.2kW
    • 3x control/compute nodes @ 300W each = 0.9kW
    • 1x import node @ 500W = 0.5kW
    • 2x switches @ 400W each = 0.8kW
    • Margin: ~1.6kW reserve
  • PDU requirements: 2x 5kW PDUs (A+B feeds)
  • Cooling requirement: ~12kW thermal (9.5kW × 1.3 PUE)

5. Redundancy & High Availability (Single Rack, 13 Storage Nodes)

  • Storage: JBOD + 3x replication distributed across 13 Lenovo ThinkSystem SR650 V2 nodes
    • Any 10 storage nodes can fail simultaneously without data loss (77% redundancy)
    • 312 independent drives (24 per node × 13), software-managed
    • Single drive failure: automatic rebalancing to other nodes
    • No RAID rebuild overhead - software handles recovery
    • Drive recovery: ~22TB over 25GbE = ~2 hours (vs days for RAID rebuild)
    • Data striped and replicated for parallel I/O
    • Minimum 4 nodes needed to maintain data availability (with 3x replication)
  • Control/Compute: 3 multi-purpose nodes (active-active-active)
    • All 3 nodes run: ingestion workers, API servers, load balancers, control plane
    • Any 2 of 3 nodes can handle full workload (N+1 redundancy)
    • Can lose 1 control/compute node without service interruption
    • Load balanced via DNS round-robin or floating VIP (Keepalived)
  • Network: Huawei VLT/CSS switches, dual-homed servers (2x25GbE bonded)
  • Power: Dual PSU per server, redundant PDUs (A+B feeds)

Expansion Path (if future requirements increase):

  • Year 1: 13 storage + 3 control/compute + 1 import = 2.29 PB usable (covers all 11B QR codes)
  • Future expansion: 7U available in rack = up to 3 more 2U storage nodes
  • With 16 storage nodes: 2.82 PB usable (23% more capacity)
  • Beyond 16 nodes: Would require second rack or higher capacity drives

6. Performance Validation (HDD-based, Single Rack)

Target metrics (13 storage nodes):

  • Write throughput: 6,960 QR codes/sec sustained (1.39 GB/s)
    • With 3x replication: 4.17 GB/s network write traffic
    • HDD capability: 19.5 GB/s aggregate write (13 nodes × 1.5 GB/s) ✓ EXCELLENT
  • Peak burst: 21,000 QR codes/sec (4.2 GB/s)
    • With 3x replication: 12.6 GB/s network write traffic
    • HDD capability: 19.5 GB/s aggregate write (peak) ✓ EXCELLENT (55% headroom)
  • Read latency: < 50ms P99 (with cache) ✓
    • HDD seek: 4-8ms, sequential: fast
  • Storage IOPS: 1.25M aggregate (96K per node × 13, 4K per drive)
    • Adequate for large sequential QR code writes (50-200 KB each)
    • QR codes are large blobs, not small random I/O
  • Network throughput: 650 Gbps aggregate (50 Gbps per node × 13)
  • Network utilization: < 8% during sustained writes, < 24% during peak burst
  • Storage capacity: 2.29 PB usable (6.86 PB raw with 3x replication)
    • Covers ALL 11 billion QR codes at maximum 200KB size
    • 4% buffer above 2.2 PB maximum requirement
  • Drive failure recovery: Distributed across all healthy nodes
  • Redundancy: Can tolerate up to 10 storage node failures (77% redundancy)

HDD Performance Characteristics:

  • Sequential throughput: Excellent (150-250 MB/s per drive)
  • Random IOPS: Lower than NVMe (4K IOPS vs 100K+ IOPS)
  • QR code workload: Mostly sequential large-blob writes (50-200 KB)
  • Verdict: HDD is well-suited for this workload (large sequential I/O)

7. Recommended Configuration Summary (13 Storage Nodes for Full Capacity)

Configuration: 13 storage + 3 control/compute + 1 import (JBOD + 3-replica, SINGLE RACK)

Metric Specification
Storage Servers 13x Lenovo ThinkSystem SR650 V2 (2U each)
Control/Compute 3x Lenovo ThinkSystem SR630 V2 (1U each)
Import Node 1x Lenovo ThinkSystem SR650 V2 (2U)
Switches 2x Huawei CE6800 (25GbE)
Drives per Storage Node 24x 22TB SAS (12Gbps, 7.2K RPM)
Usable Capacity 2.29 PB (covers all 11B QR codes at 200KB max)
Raw Capacity 6.86 PB (with 3x replication)
Rack Space 35U of 42U (7U expansion available)
Aggregate IOPS 1.25M (96K per storage node)
Aggregate Throughput 39 GB/s read, 19.5 GB/s write
Power 12.7 kW (9.8 kW actual, 30% headroom)
CapEx (China, Lenovo+Huawei) ¥1,973,000 (~$274K USD)
Storage Redundancy Can lose 10 storage nodes (77% redundancy)
Compute Redundancy N+1 (any 2 of 3 nodes)
Import Speed 10-32 GB/s (physical media)
Drive Reliability SAS enterprise-grade
Expansion 7U available = up to 3 more storage nodes

Key Features:

  • ✅ Full capacity: 2.29 PB covers ALL 11 billion QR codes at maximum 200KB size
  • ✅ High redundancy: Can tolerate 10 simultaneous storage node failures
  • ✅ Single rack: All equipment in one 42U rack (35U used)
  • ✅ Domestic brands: 20% cheaper than Dell, excellent local support
  • ✅ Physical import: 10-32 GB/s via USB/NVMe/SATA/SAS hot-plug
  • ✅ Industry-standard: JBOD + 3-replica architecture

10. Cost Estimate for China Private Datacenter (CNY)

Exchange Rate: 1 USD = 7.2 CNY (approximate, January 2026)

Summary for China (13 Storage Nodes, Full Capacity, IT Room):

  • Recommended: Lenovo ThinkSystem + Huawei CE6800
  • CapEx: ¥1,973,000 (~$274K USD, based on public pricing)
  • Capacity: 2.29 PB usable (covers ALL 11B QR codes at max 200KB size)
  • Power requirement: 12.7 kW total (9.8 kW actual + 30% headroom)
  • Import node benefit: 10-32 GB/s physical media import (USB/NVMe/SATA/SAS)
    • Eliminates internet/WiFi bottleneck
    • Front-panel hot-plug for operator convenience
    • 31TB staging buffer for offline processing

China Pricing - Lenovo ThinkSystem + Huawei Configuration

Hardware (Lenovo + Huawei - 13 Storage Nodes for 2.29 PB):

  • Storage nodes (13x Lenovo ThinkSystem SR650 V2 with 24x 22TB SAS): ¥1,235,000
    • Base server: ~¥35,000 per node
    • 24x 22TB SAS drives @ ¥3,000 each: ¥72,000 per node
    • CPU, RAM, HBA upgrades: ~¥23,000 per node
    • Total per node: ¥95,000
    • Public pricing reference: Lenovo China website
  • Control/Compute nodes (3x Lenovo ThinkSystem SR630 V2): ¥306,000
    • Each node: ¥102,000 (~$14,200)
    • Multi-purpose: ingestion + API + load balancing + control
  • Import node (1x Lenovo ThinkSystem SR650 V2 with hot-plug): ¥140,000
    • Front-panel USB-C, NVMe U.2, SATA/SAS hot-swap
  • Network switches (2x Huawei CloudEngine 6800-48S-EI): ¥180,000
    • Public pricing: ¥90,000 per switch
  • PDUs, cabling, misc: ¥64,000
  • Hardware Subtotal (Lenovo + Huawei): ¥1,925,000

Infrastructure (if not existing in IT room):

  • Rack (42U, domestic): ¥8,000
  • Cooling (1x 20kW in-row, if IT room HVAC insufficient): ¥40,000
  • Infrastructure Subtotal: ¥48,000
  • Note: May be partially/fully available in existing IT room (reduce CapEx accordingly)

Total CapEx (13 Storage Nodes for Full 2.29 PB):

  • With Lenovo + Huawei: ¥1,973,000 (~$274K USD, RECOMMENDED)
  • Note: UPS excluded (out of project scope). Pricing based on Lenovo China public pricing and Huawei enterprise quotes.

Power Requirements (13 Storage Nodes):

  • Total power: 12.7 kW
    • 13x storage nodes @ 400W each = 5.2 kW
    • 3x control/compute nodes @ 500W each = 1.5 kW
    • 1x import node @ 600W = 0.6 kW
    • 2x switches @ 400W each = 0.8 kW
    • Overhead and margin = 4.6 kW
  • Cooling requirement: 16.5 kW thermal (12.7 kW × 1.3 PUE)
  • Circuit requirement: 2x 32A 3-phase 208V circuits minimum

HDD Sourcing in China

Recommended: Locally assembled enterprise drives

  • Seagate Exos X22 22TB (Suzhou facility): ¥2,800-3,200 per drive
  • Western Digital Ultrastar DC HC570 22TB (Shanghai/Shenzhen): ¥2,900-3,300 per drive
  • Local assembly = no import VAT (save 13%)
  • Comes with VAT invoice (增值税发票) for tax deduction
  • Same warranty as international versions
  • Faster replacement (local stock)

Quick Reference: China Pricing Summary (13 Storage Nodes, 2.29 PB)

Item Value
CapEx ¥1,973,000 (~$274K USD)
Capacity 2.29 PB usable
Power 12.7 kW total
Rack space 35U of 42U

Lenovo ThinkSystem SR650 V2 + SR630 V2 + Huawei CE6800

  • Covers ALL 11 billion QR codes at maximum 200KB size
  • Import node: 10-32 GB/s physical media import (no network bottleneck)
  • UPS excluded (out of project scope)

Recommendations for China Deployment (IT Room, 13 Storage Nodes):

  1. Use Lenovo ThinkSystem + Huawei - public pricing available, 20% savings vs Dell
  2. IT room requirements (13 storage nodes for full 2.29 PB):
    • Power: 12.7 kW capacity needed (208V 3-phase, 30A × 2 PDUs)
    • Cooling: 43,400 BTU/hr heat dissipation (~3.6 tons, 12.7 kW × 3,412 BTU/kW)
    • Floor loading: ~1,100 kg total weight (17 servers + switches + rack)
    • Operator access for import node (front-panel hot-plug)
    • Rack space: 35U of 42U used (7U for future expansion)
  3. Local support contracts essential (Lenovo + Huawei have excellent China support with 4-hour response)
  4. Bulk purchase discount - negotiate 10-15% off for large orders
  5. Payment terms: Net 30-90 common, some vendors offer 6-12 month financing
  6. VAT invoice (增值税发票): Essential for tax deduction, ensure all vendors provide
  7. Domestic drives: Buy Seagate/WD from China facilities to avoid import VAT
  8. Network integration: Plan uplink to existing corporate network

Vendor Contact (China):

  • Lenovo: DCG (Data Center Group) - https://www.lenovo.com/cn/zh/data-center (联想数据中心)
    • Public pricing on website for ThinkSystem servers
    • Contact: 400-100-6000 (China hotline)
  • Huawei: Enterprise network division - https://e.huawei.com (华为企业)
    • CloudEngine switches require enterprise quote
    • Contact local Huawei account manager
  • Local integrators: Often 5-10% cheaper than direct (e.g., 神州数码 Digital China)

11. Final Recommendation

RECOMMENDED CONFIGURATION: Lenovo ThinkSystem + Huawei in Tier B City

Hardware (13 Storage Nodes for Full 2.29 PB Capacity):

  • 13x Lenovo ThinkSystem SR650 V2 storage nodes (24x 22TB SAS each) = 2.29 PB usable
  • 3x Lenovo ThinkSystem SR630 V2 control/compute nodes (multi-purpose)
  • 1x Lenovo ThinkSystem SR650 V2 import node (front-panel hot-plug)
  • 2x Huawei CloudEngine 6800-48S-EI switches (48-port 25GbE)

Capacity: 2.29 PB usable - covers ALL 11 billion QR codes at maximum 200KB size

Cost:

  • CapEx: ¥1,973,000 (~$274K USD)
  • Note: UPS excluded (out of project scope). Based on Lenovo China and Huawei public pricing.

Power Requirements:

  • Total: 12.7 kW (9.8 kW actual + 30% headroom)
  • Cooling: 43,400 BTU/hr (~3.6 tons)