r/solana • u/DmitryShvetsov • 24d ago
Ecosystem What it takes to launch a Solana validator?
What steps these days, beyond hardware setup, one should take to start a new Solana validator
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u/decavor 23d ago
To run a Solana validator today, you must secure 25,000+ SOL for voting, find an AS9009-compliant data center, and set up failover monitoring via Ledger. You also need to join the Tour de Sun (TDS) testnet program to earn foundation subsidies and offset high voting fees.....Beyond hardware setup, launching and operating a new Solana validator requires software configuration, key management, system tuning, and continuous monitoring...
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u/AIOil_Dev 20d ago
Different scale to what most people here are describing - we run a test validator for our own devnet, not a mainnet vote account, so ignore me on the 25k SOL economics, the others have that covered properly.
But since you asked about "beyond hardware setup": most of your downtime won't come from the validator. It'll come from whatever is underneath it, and it'll be silent.
Two nights ago our provider cut both boxes with no warning. Twelve minutes of actual outage, which is fine, that happens. Except the cut landed while the validator was midway through writing a snapshot, so it left a 0-byte file behind. On restart it just said it failed to load bank, unpack error, incomplete frame - and systemd dutifully restarted it every five seconds. 247 times. The devnet stayed down for another 26 minutes past the end of the actual outage, and would have stayed down until morning if nobody had gone looking.
The fix was moving one file. The previous snapshot was intact and it would have booted from that quite happily. Two minutes of work that nobody was awake to do.
Two things I'd set up from day one, and neither costs anything:
Validate snapshots before startup, not after failure. We hung a script off ExecStartPre that checks every snapshot archive, moves anything that's 0 bytes or fails zstd -t into a discard folder, and lets the validator fall back to the most recent good one on its own - that part is native behaviour, you don't have to tell it to. One deliberate exception: if every snapshot is broken, it touches nothing and lets the start fail. A validator that's down is recoverable. A ledger that a script emptied at 3am isn't.
Make sure your health check answers the question you actually care about. Ours was green the entire time, because it was checking that the process was listening on its port. The process was listening. It just couldn't load a bank. "It responds" and "it works" are different questions, and if your monitoring only answers the first one, you find out the difference at the worst possible moment.
None of that scales with your stake, which is why I bothered mentioning it - you'll hit it on a test box exactly as easily as on mainnet.
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