High Voltage (HVCO) SHA256/SHA256d Mining Pool Setup — Vardiff Tuning for Spiky Hashrate

HVCO miners connect over SHA256/SHA256d Stratum just like other SHA256 coins, but the operational pain is often burst traffic: sudden hashrate, reconnections, and high share submit rates. This guide focuses on stability under load.

HVCO stability goals: keep share throughput predictable

For HVCO, assume you will see step-changes in hashrate—especially if you allow marketplace hashpower. Build for backpressure: control share rate, protect the database, and keep node/template generation isolated from edge traffic.

• VarDiff focus: VarDiff (variable difficulty) changes share difficulty per miner to keep submit rate within safe bounds.
• Backpressure controls: Set per-IP limits, connection caps, and timeouts so one farm can’t starve the pool.
• Stale-share visibility: Track stales by port and by miner type; high stales usually mean latency or job-switch behavior.
• Wallet isolation: Keep payout signing and broadcasting away from Stratum hosts so load spikes can’t affect payments.

HVCO stack choice with load in mind

Any solid SHA256 pool core can run HVCO; what matters is whether it gives you the operational levers you need under stress.

• Yiimp-based: Works well when you want a familiar UI quickly and can scale the DB and Stratum layer as traffic grows; see .
• Miningcore: Works well for multi-instance Stratum gateways with a cleaner API surface; see .
• Edge-gateway scaling: If you expect spikes, we can front Stratum with dedicated gateways and keep accounting services on private networks.

HVCO tuning scope (Stratum, DB, wallet, monitoring)

• HVCO node/RPC setup: Install the HVCO daemon, restrict RPC exposure, and add health checks that fail fast when the tip lags.
• Stratum limits + timeouts: Define connection caps, per-IP throttles, and session timeouts to reduce reconnection storms.
• VarDiff calibration: Tune difficulty step size and retarget cadence to keep shares steady even when hashrate jumps.
• Payout pipeline: Implement batching, retries, and confirmation gates; reference and .
• Database headroom: Index the hot tables and set retention so spikes don’t degrade queries for everyone.
• Security posture: Apply DDoS-aware network rules, secrets rotation, and monitoring; see .

If HVCO is one coin in a larger SHA256 suite, we isolate its Stratum gateways and share tables so a spike doesn’t slow payouts or UIs for other coins.

HVCO miner URL examples and compatibility notes

Keep HVCO miner docs simple and include one explicit note about difficulty adjustment behavior so miners understand why difficulty changes during a run.

stratum+tcp://POOL-DOMAIN:3333
stratum+ssl://POOL-DOMAIN:3443

When you offer multiple ports (low/med/high diff), document which miners should use each and why.

HVCO-specific stability notes: vardiff, bans, and stales

• HVCO vardiff targets: Pick a target share rate per miner class and tune to hit it; the right answer depends on DB capacity and expected miner count.
• Ban policy under spikes: Set temporary bans for repeated invalid shares and aggressive reconnect loops, but keep thresholds high enough for real farms.
• Stale rate triage: When stales rise, first check latency and job switching frequency; only then adjust difficulty cadence or port assignment.

HVCO load-test checklist before public launch

• Simulate a hashrate spike (or use a controlled rented-hash test) and measure share submits per second.
• Verify Stratum gateways can restart without dropping all miners at once (rolling restarts).
• Confirm that bans and rate limits stop abuse but do not block legitimate miners during reconnect storms.
• Watch DB write latency during the spike and adjust indexes/retention until it stays stable.
• Ensure node health checks gate work distribution when HVCO tip height or peer count falls below thresholds.
• Run a payout test while the pool is under load to confirm wallet actions are unaffected.
• Publish a short HVCO troubleshooting page with common reject/stale causes and what miners should change.

HVCO pool FAQs

Planning a HVCO pool and want a sanity check before launch? Contact us and include expected hashrate spikes and whether you plan to accept rented hashpower.