mirror of https://github.com/milvus-io/milvus.git
34 lines
1.1 KiB
Go
34 lines
1.1 KiB
Go
package balancer
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/cockroachdb/errors"
|
|
|
|
"github.com/milvus-io/milvus/pkg/v2/streaming/util/types"
|
|
"github.com/milvus-io/milvus/pkg/v2/util/typeutil"
|
|
)
|
|
|
|
var (
|
|
_ Balancer = (*balancerImpl)(nil)
|
|
ErrBalancerClosed = errors.New("balancer is closed")
|
|
)
|
|
|
|
// Balancer is a load balancer to balance the load of log node.
|
|
// Given the balance result to assign or remove channels to corresponding log node.
|
|
// Balancer is a local component, it should promise all channel can be assigned, and reach the final consistency.
|
|
// Balancer should be thread safe.
|
|
type Balancer interface {
|
|
// WatchChannelAssignments watches the balance result.
|
|
WatchChannelAssignments(ctx context.Context, cb func(version typeutil.VersionInt64Pair, relations []types.PChannelInfoAssigned) error) error
|
|
|
|
// MarkAsAvailable marks the pchannels as available, and trigger a rebalance.
|
|
MarkAsUnavailable(ctx context.Context, pChannels []types.PChannelInfo) error
|
|
|
|
// Trigger is a hint to trigger a balance.
|
|
Trigger(ctx context.Context) error
|
|
|
|
// Close close the balancer.
|
|
Close()
|
|
}
|