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Allow lower shred count (#9410)

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sakridge
2020-04-09 16:36:44 -07:00
committed by GitHub
parent f3afe5c99c
commit be77bdef12
2 changed files with 12 additions and 7 deletions
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11
core/src/ledger_cleanup_service.rs
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@ -13,15 +13,18 @@ use std::thread;
use std::thread::{Builder, JoinHandle};
use std::time::Duration;
// - To try and keep the RocksDB size under 512GB:
// Seeing about 1600b/shred, using 2000b/shred for margin, so 250m shreds can be stored in 512gb.
// at 5k shreds/slot at 50k tps, this is 500k slots (~5.5 hours).
// - To try and keep the RocksDB size under 400GB:
// Seeing about 1600b/shred, using 2000b/shred for margin, so 200m shreds can be stored in 400gb.
// at 5k shreds/slot at 50k tps, this is 500k slots (~5 hours).
// At idle, 60 shreds/slot this is about 4m slots (18 days)
// This is chosen to allow enough time for
// - A validator to download a snapshot from a peer and boot from it
// - To make sure that if a validator needs to reboot from its own snapshot, it has enough slots locally
// to catch back up to where it was when it stopped
pub const DEFAULT_MAX_LEDGER_SHREDS: u64 = 250_000_000;
pub const DEFAULT_MAX_LEDGER_SHREDS: u64 = 200_000_000;
// Allow down to 50m, or 3.5 days at idle, 1hr at 50k load, around ~100GB
pub const DEFAULT_MIN_MAX_LEDGER_SHREDS: u64 = 50_000_000;
// Check for removing slots at this interval so we don't purge too often
// and starve other blockstore users.