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change base for exp backoff

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This commit is contained in:
Felix Ableitner 2024-04-08 11:25:03 +02:00
parent cd00be9489
commit e4abdefe09
1 changed files with 10 additions and 13 deletions
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23
crates/api_common/src/lib.rs
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@ -45,14 +45,14 @@ impl Default for SuccessResponse {
// TODO: use from_hours once stabilized
// https://github.com/rust-lang/rust/issues/120301
const HOUR: Duration = Duration::from_secs(3600);
const DAY: Duration = Duration::from_secs(3600);
/// Calculate how long to sleep until next federation send based on how many
/// retries have already happened. Uses exponential backoff with maximum of one hour.
/// retries have already happened. Uses exponential backoff with maximum of one day.
pub fn federate_retry_sleep_duration(retry_count: i32) -> Duration {
let pow = 2.0_f64.powf(retry_count.into());
let pow = Duration::try_from_secs_f64(pow).unwrap_or(HOUR);
min(HOUR, pow)
let pow = 1.25_f64.powf(retry_count.into());
let pow = Duration::try_from_secs_f64(pow).unwrap_or(DAY);
min(DAY, pow)
}
#[cfg(test)]
@ -61,13 +61,10 @@ pub(crate) mod tests {
#[test]
fn test_federate_retry_sleep_duration() {
let s = Duration::from_secs;
assert_eq!(s(1), federate_retry_sleep_duration(0));
assert_eq!(s(2), federate_retry_sleep_duration(1));
assert_eq!(s(4), federate_retry_sleep_duration(2));
assert_eq!(s(8), federate_retry_sleep_duration(3));
assert_eq!(s(16), federate_retry_sleep_duration(4));
assert_eq!(s(1024), federate_retry_sleep_duration(10));
assert_eq!(s(3600), federate_retry_sleep_duration(100));
let s = |s,m: u32| Duration::new(s, m * 1000);
assert_eq!(s(1, 0), federate_retry_sleep_duration(0));
assert_eq!(s(1, 250000), federate_retry_sleep_duration(1));
assert_eq!(s(1, 562500), federate_retry_sleep_duration(2));
assert_eq!(DAY, federate_retry_sleep_duration(100));
}
}