How to mine Conflux on Octopus algorithm? (CFX Mining Guide)

Understanding the Octopus Algorithm

1. The Octopus algorithm is a proof-of-work consensus mechanism specifically designed for Conflux Network to resist ASIC dominance and promote decentralization.

2. It combines elements of RandomX and ProgPoW, emphasizing memory-hardness and frequent code updates to hinder specialized hardware optimization.

3. Octopus requires at least 4 GB of RAM per mining thread and benefits from high-bandwidth memory access rather than raw computational throughput.

4. Unlike traditional SHA-256 or Ethash, Octopus dynamically adjusts its instruction set every epoch—approximately every 10 minutes—to complicate firmware-level optimizations.

5. Its memory latency sensitivity makes consumer-grade DDR4 systems more competitive than datacenter-grade GPUs with high compute but suboptimal memory timing configurations.

Hardware Requirements and Compatibility

1. CPUs with AVX2 support and at least 8 physical cores are strongly recommended; AMD Ryzen 5000 series and Intel Core i7-10700K or newer perform consistently well.

2. Minimum system RAM must be 32 GB DDR4, with dual-channel configuration preferred to sustain memory bandwidth above 40 GB/s.

3. Integrated graphics are sufficient since GPU utilization remains below 15% during Octopus mining—dedicated GPUs are unnecessary and often counterproductive due to increased power draw without proportional hash rate gains.

4. NVMe SSDs are required for fast dataset loading; SATA III drives introduce measurable latency spikes during epoch transitions.

5. Thermal throttling must be avoided—CPU core temperatures should remain under 75°C sustained, as Octopus workloads trigger aggressive frequency scaling when thermal limits are approached.

Setting Up the Mining Software

1. Official Conflux CLI tools do not support Octopus mining directly; miners rely on third-party forks such as conflux-miner-octopus, maintained by community developers on GitHub.

2. Compilation requires Rust 1.72+ and CMake 3.19+, with specific patches applied to disable SIMD optimizations that conflict with Octopus’s dynamic instruction scheduler.

3. Configuration files must specify --octopus-epoch-jump=600 to align with network timing, otherwise stale shares increase beyond 12%.

4. Pool connection mandates TLS 1.3 encryption; connections using older TLS versions are rejected by all major Conflux pools including ViaBTC and F2Pool CFX endpoints.

5. Each miner instance must bind to a unique local port to prevent nonce collision across threads—even identical configurations on separate CPU sockets require distinct RPC ports.

Pool Selection and Connection Parameters

1. Only pools supporting the CFX-OCTOPUS-PROTOCOL-V2 handshake can accept valid shares; legacy Stratum V1 endpoints return “invalid job” errors silently.

2. ViaBTC’s octopus.confluxpool.com:3333 enforces mandatory worker name formatting: wallet_address.worker_id, where worker_id must contain only alphanumeric characters and underscores.

3. Difficulty adjustment occurs every 30 seconds instead of per-block, meaning pool-side difficulty settings override local miner configurations entirely.

4. Share rejection rates exceeding 8% indicate either incorrect clock synchronization (NTP drift > 200ms) or misconfigured memory affinity masks in Linux cpuset settings.

5. Payout thresholds vary per pool—F2Pool requires 1.5 CFX minimum, while Nanopool enforces 0.8 CFX with daily auto-payout regardless of balance.

Frequently Asked Questions

Q: Can I mine Octopus using a virtual machine?A: No. Octopus requires direct access to CPU instruction pipelines and memory controllers. Hypervisor-based environments introduce unpredictable timing jitter that causes immediate share invalidation.

Q: Does overclocking improve Octopus hash rate?A: Not reliably. Increasing CPU frequency beyond stock specs often reduces effective memory bandwidth due to tighter timing constraints, resulting in net hash rate loss despite higher clock speeds.

Q: Why does my miner report “low memory pressure” but still stall during epoch transitions?A: This indicates insufficient page cache pre-allocation. The kernel parameter vm.swappiness must be set to 10, and the miner binary must be launched with memlock unlimited via ulimit -l unlimited.

Q: Are there known compatibility issues with AMD EPYC processors?A: Yes. EPYC 7002 series requires microcode update 0x8008109 before stable Octopus operation; earlier revisions produce inconsistent nonce generation leading to persistent share rejections.