asim: replica load adapter

[kvoli]

This patch introduces an adapter for the simulator state of load on
stores and replicas, into the datastructures supported by the allocator.

Replica load may be experimented with in the future and this patch
defines an interface for interacting with recording and summarizing
replica load.

Store load is partially an aggregaton of replica load and
therefore relies on the replica load interface to calculate capacity.

Release note: None

[cockroach-teamcity]

This change is 

[lidorcarmel]

looks great, minor nits.

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @kvoli)

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-- commits line 11 at r1:
typo?

Code quote:

aggregaton

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pkg/kv/kvserver/asim/load.go line 21 at r1 (raw file):

// order to record and report load events.
type ReplicaLoad interface {
	// AppluLoad applies a load event to a replica.

typo

Code quote:

AppluLoad

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pkg/kv/kvserver/asim/load.go line 65 at r1 (raw file):

// replica within the store.
func (s *Store) Capacity() roachpb.StoreCapacity {
	capacity := roachpb.StoreCapacity{}

just to make sure I understand correctly - we will need to populate more fields for capacity here, right? such as roachpb.StoreCapacity.capacity and available etc.
worth adding a todo?

[kvoli]

TYFTR!

Reviewable status: complete! 0 of 0 LGTMs obtained (waiting on @lidorcarmel)

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-- commits line 11 at r1:

Previously, lidorcarmel (Lidor Carmel) wrote…

typo?

Updated.

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pkg/kv/kvserver/asim/load.go line 21 at r1 (raw file):

Previously, lidorcarmel (Lidor Carmel) wrote…

typo

Updated.

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pkg/kv/kvserver/asim/load.go line 65 at r1 (raw file):

Previously, lidorcarmel (Lidor Carmel) wrote…

just to make sure I understand correctly - we will need to populate more fields for capacity here, right? such as roachpb.StoreCapacity.capacity and available etc.
worth adding a todo?

Added.

[kvoli]

bors r+

[craig]

Build succeeded:

• GitHub CI (Cockroach)