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feat(get): add local-first shard reads (#3924)

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* feat(get): observe shard locality cost

* feat(get): add local-first shard reads

----

Co-Authored-By: Heihutu <heihutu@gmail.com>
This commit is contained in:
houseme
2026-06-27 01:08:36 +08:00
committed by GitHub
parent e5706ead0e
commit 8994a8ff00
3 changed files with 381 additions and 6 deletions
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crates/io-metrics/src/lib.rs
+33
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@@ -759,6 +759,39 @@ pub fn record_get_object_shard_read_cost_summary(
.increment(1);
}
/// Record opt-in GetObject shard-locality policy effects.
#[inline(always)]
pub fn record_get_object_shard_locality_policy(
path: &'static str,
local_preferred: usize,
remote_avoided: usize,
fallback_to_remote: usize,
) {
if !get_stage_metrics_enabled() {
return;
}
if local_preferred > 0 {
counter!("rustfs_io_get_object_shard_local_preferred_total", "path" => path)
.increment(u64::try_from(local_preferred).unwrap_or(u64::MAX));
}
if remote_avoided > 0 {
counter!("rustfs_io_get_object_shard_remote_avoided_total", "path" => path)
.increment(u64::try_from(remote_avoided).unwrap_or(u64::MAX));
}
if fallback_to_remote > 0 {
counter!("rustfs_io_get_object_shard_fallback_to_remote_total", "path" => path)
.increment(u64::try_from(fallback_to_remote).unwrap_or(u64::MAX));
}
}
/// Record that the opt-in shard-locality policy stayed disabled for a stripe.
#[inline(always)]
pub fn record_get_object_shard_locality_policy_disabled(path: &'static str) {
if !get_stage_metrics_enabled() {
return;
}
counter!("rustfs_io_get_object_shard_locality_policy_disabled_total", "path" => path).increment(1);
}
/// Record per-stripe shard-read fanout shape for GetObject read-path attribution.
#[inline(always)]
pub fn record_get_object_shard_read_fanout(