This doesn't really need to be fallible but forces propagation of a ton
of error handling - no shards is always a sign of something being very
wrong, and can be caught in the caller if it's for some reason an
acceptable state / can be recovered from.
The Sequencer (which will be renamed shortly) is a type that represents
a single sequencer/shard/kafka partition in the router.
In order to minimise confusion with all the various IDs floating around,
we have a KafkaPartition - this commit changes the Sequencer to return
the Kafka partition index as a typed value, rather than a usize to help
eliminate any inconsistencies.
As a side effect of these conversion changes, I've tightened up the
casting to ensure we assert on any overflows - we juggle a lot of
numeric types!
* feat: Log time spent requesting ingester partitions
Fixes#4558.
* feat: Record a metric for the duration queriers wait on ingesters
* fix: Use DurationHistogram instead of U64 Histogram
* test: Add a test for the ingester ms metric
* feat: Add back the logging to provide both logging and metrics for ingester duration
* refactor: Use sample_count method on metrics
* feat: Record ingester duration separately for success or failure
* fix: Create a separate test for the ingester metrics
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>
Carol (Nichols || Goulding)
Dom Dwyer
Carol (Nichols || Goulding)