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feat(common): add MRF intent channel and Mrf request source (HS-01)

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Introduce the producer-facing half of the mission repair feed: a global
bounded (8192) channel carrying lightweight MrfIntent values from IO
error paths, plus the RUSTFS_HEAL_MRF_ENABLE delivery kill-switch and
config constants for queue/journal sizing. Delivery is strictly
non-blocking (try_send, drop-on-full) so it can sit on decode-failure
and partial-write paths without adding latency. HealRequestSource grows
a 'mrf' variant so admission accounting can attribute replayed intents.

Part of backlog#1865 (option a: wire HealEvent-style intents with a
durable retry ledger).

Co-Authored-By: heihutu <heihutu@gmail.com>
This commit is contained in:
houseme
2026-08-18 09:03:02 +08:00
parent beb6e1383e
commit f477d27861
4 changed files with 236 additions and 0 deletions
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crates/config/src/constants/heal.rs
+28
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@@ -177,3 +177,31 @@ pub const DEFAULT_HEAL_MAINLINE_WRITE_UTILIZATION_HIGH_PERCENT: usize = 80;
/// Default foreground pressure recheck delay for heal scheduler, in milliseconds.
pub const DEFAULT_HEAL_MAINLINE_MAX_SLEEP_MS: u64 = 250;
/// Environment variable that toggles the MRF (mission repair feed) intent
/// pipeline: error paths deliver repair intents to the heal runtime, and
/// unconsumed intents are replayed from the durable journal after a restart.
pub const ENV_HEAL_MRF_ENABLE: &str = "RUSTFS_HEAL_MRF_ENABLE";
/// Environment variable for the MRF in-memory queue capacity (intent count).
pub const ENV_HEAL_MRF_QUEUE_SIZE: &str = "RUSTFS_HEAL_MRF_QUEUE_SIZE";
/// Environment variable for the MRF journal byte budget. The journal is
/// compacted once its on-disk size crosses this bound.
pub const ENV_HEAL_MRF_JOURNAL_MAX_BYTES: &str = "RUSTFS_HEAL_MRF_JOURNAL_MAX_BYTES";
/// Environment variable for the MRF journal replay batch size (intents per
/// replay push round).
pub const ENV_HEAL_MRF_REPLAY_BATCH: &str = "RUSTFS_HEAL_MRF_REPLAY_BATCH";
/// Default behavior keeps the MRF intent pipeline enabled.
pub const DEFAULT_HEAL_MRF_ENABLE: bool = true;
/// Default MRF queue capacity (matches MinIO's 100k MRF list ceiling).
pub const DEFAULT_HEAL_MRF_QUEUE_SIZE: usize = 100_000;
/// Default MRF journal byte budget (8 MiB), mirroring the channel payload cap.
pub const DEFAULT_HEAL_MRF_JOURNAL_MAX_BYTES: usize = 8 * 1024 * 1024;
/// Default MRF replay batch size.
pub const DEFAULT_HEAL_MRF_REPLAY_BATCH: usize = 256;