Enum swanling::metrics::SwanlingCoordinatedOmissionMitigation [−][src]
pub enum SwanlingCoordinatedOmissionMitigation { Average, Maximum, Minimum, Disabled, }
Expand description
THIS IS IN EXPERIMENTAL FEATURE, DISABLED BY DEFAULT. Optionally mitigate the loss of data (coordinated omission) due to stalls on the upstream server.
Stalling can happen for many reasons, for example: garbage collection, a cache stampede,
even unrelated load on the same server. Without any mitigation, Swanling loses
statistically relevant information as SwanlingUser
threads are unable to make additional requests while they are blocked by an upstream stall.
Swanling mitigates this by backfilling the requests that would have been made during that time.
Backfilled requests show up in the --request-file
if enabled, though they were not actually
sent to the server.
Swanling can be configured to backfill requests based on the expected
user_cadence
. The expected
cadence can be automatically calculated with any of the following configuration options.
Variants
Backfill based on the average
user_cadence
for this
SwanlingUser
.
Backfill based on the maximum
user_cadence
for this
SwanlingUser
.
Backfill based on the minimum
user_cadence
for this
SwanlingUser
.
Completely disable coordinated omission mitigation (default).
Trait Implementations
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error> where
__D: Deserializer<'de>,
Deserialize this value from the given Serde deserializer. Read more
Allow --co-mitigation
from the command line using text variations on supported
SwanlingCoordinatedOmissionMitigation
s by implementing FromStr
.
fn set_default(
self,
key: SwanlingDefault,
value: SwanlingCoordinatedOmissionMitigation
) -> Result<Box<Self>, SwanlingError>
Auto Trait Implementations
Blanket Implementations
Mutably borrows from an owned value. Read more
Compare self to key
and return true
if they are equal.
Instruments this type with the provided Span
, returning an
Instrumented
wrapper. Read more
type Output = T
type Output = T
Should always be Self
pub fn vzip(self) -> V