[#1439] object: Sort nodes by priority metrics to compute GET request
Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>
This commit is contained in:
parent
3cd7d23f10
commit
81f4cdbb91
10 changed files with 449 additions and 11 deletions
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@ -58,6 +58,7 @@ import (
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/control"
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objectService "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object"
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getsvc "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/get"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/placement"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/tombstone"
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tsourse "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object_manager/tombstone/source"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/replicator"
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@ -109,6 +110,7 @@ type applicationConfiguration struct {
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ObjectCfg struct {
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tombstoneLifetime uint64
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priorityMetrics []placement.Metric
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}
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EngineCfg struct {
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@ -232,6 +234,15 @@ func (a *applicationConfiguration) readConfig(c *config.Config) error {
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// Object
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a.ObjectCfg.tombstoneLifetime = objectconfig.TombstoneLifetime(c)
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var pm []placement.Metric
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for _, raw := range objectconfig.Get(c).Priority() {
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m, err := placement.ParseMetric(raw)
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if err != nil {
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return err
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}
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pm = append(pm, m)
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}
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a.ObjectCfg.priorityMetrics = pm
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// Storage Engine
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@ -10,10 +10,17 @@ type PutConfig struct {
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cfg *config.Config
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}
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// GetConfig is a wrapper over "get" config section which provides access
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// to object get pipeline configuration of object service.
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type GetConfig struct {
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cfg *config.Config
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}
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const (
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subsection = "object"
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putSubsection = "put"
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getSubsection = "get"
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// PutPoolSizeDefault is a default value of routine pool size to
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// process object.Put requests in object service.
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@ -56,3 +63,16 @@ func (g PutConfig) PoolSizeLocal() int {
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func (g PutConfig) SkipSessionTokenIssuerVerification() bool {
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return config.BoolSafe(g.cfg, "skip_session_token_issuer_verification")
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}
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// Get returns structure that provides access to "get" subsection of
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// "object" section.
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func Get(c *config.Config) GetConfig {
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return GetConfig{
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c.Sub(subsection).Sub(getSubsection),
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}
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}
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// Priority returns the value of "priority" config parameter.
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func (g GetConfig) Priority() []string {
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return config.StringSliceSafe(g.cfg, "priority")
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}
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@ -178,7 +178,8 @@ func initObjectService(c *cfg) {
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sSearchV2 := createSearchSvcV2(sSearch, keyStorage)
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sGet := createGetService(c, keyStorage, traverseGen, c.clientCache, c.cfgObject.cnrSource)
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sGet := createGetService(c, keyStorage, traverseGen, c.clientCache, c.cfgObject.cnrSource,
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c.ObjectCfg.priorityMetrics)
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*c.cfgObject.getSvc = *sGet // need smth better
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@ -389,6 +390,7 @@ func createSearchSvcV2(sSearch *searchsvc.Service, keyStorage *util.KeyStorage)
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func createGetService(c *cfg, keyStorage *util.KeyStorage, traverseGen *util.TraverserGenerator,
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coreConstructor *cache.ClientCache,
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containerSource containercore.Source,
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priorityMetrics []placement.Metric,
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) *getsvc.Service {
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ls := c.cfgObject.cfgLocalStorage.localStorage
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@ -398,6 +400,8 @@ func createGetService(c *cfg, keyStorage *util.KeyStorage, traverseGen *util.Tra
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ls,
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traverseGen.WithTraverseOptions(
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placement.SuccessAfter(1),
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placement.WithPriorityMetrics(priorityMetrics),
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placement.WithNodeState(c),
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),
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coreConstructor,
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containerSource,
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@ -87,6 +87,7 @@ FROSTFS_OBJECT_PUT_REMOTE_POOL_SIZE=100
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FROSTFS_OBJECT_PUT_LOCAL_POOL_SIZE=200
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FROSTFS_OBJECT_PUT_SKIP_SESSION_TOKEN_ISSUER_VERIFICATION=true
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FROSTFS_OBJECT_DELETE_TOMBSTONE_LIFETIME=10
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FROSTFS_OBJECT_GET_PRIORITY="$attribute:ClusterName $attribute:UN-LOCODE"
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# Storage engine section
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FROSTFS_STORAGE_SHARD_POOL_SIZE=15
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@ -131,6 +131,9 @@
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"remote_pool_size": 100,
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"local_pool_size": 200,
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"skip_session_token_issuer_verification": true
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},
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"get": {
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"priority": ["$attribute:ClusterName", "$attribute:UN-LOCODE"]
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}
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},
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"storage": {
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@ -114,6 +114,10 @@ object:
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remote_pool_size: 100 # number of async workers for remote PUT operations
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local_pool_size: 200 # number of async workers for local PUT operations
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skip_session_token_issuer_verification: true # session token issuer verification will be skipped if true
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get:
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priority: # list of metrics of nodes for prioritization
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- $attribute:ClusterName
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- $attribute:UN-LOCODE
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storage:
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# note: shard configuration can be omitted for relay node (see `node.relay`)
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@ -407,13 +407,17 @@ Contains object-service related parameters.
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object:
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put:
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remote_pool_size: 100
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get:
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priority:
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- $attribute:ClusterName
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```
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| Parameter | Type | Default value | Description |
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|-----------------------------|-------|---------------|------------------------------------------------------------------------------------------------|
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| `delete.tombstone_lifetime` | `int` | `5` | Tombstone lifetime for removed objects in epochs. |
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| `put.remote_pool_size` | `int` | `10` | Max pool size for performing remote `PUT` operations. Used by Policer and Replicator services. |
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| `put.local_pool_size` | `int` | `10` | Max pool size for performing local `PUT` operations. Used by Policer and Replicator services. |
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| Parameter | Type | Default value | Description |
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|-----------------------------|------------|---------------|------------------------------------------------------------------------------------------------------|
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| `delete.tombstone_lifetime` | `int` | `5` | Tombstone lifetime for removed objects in epochs. |
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| `put.remote_pool_size` | `int` | `10` | Max pool size for performing remote `PUT` operations. Used by Policer and Replicator services. |
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| `put.local_pool_size` | `int` | `10` | Max pool size for performing local `PUT` operations. Used by Policer and Replicator services. |
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| `get.priority` | `[]string` | | List of metrics of nodes for prioritization. Used for computing response on GET and SEARCH requests. |
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# `runtime` section
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Contains runtime parameters.
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43
pkg/services/object_manager/placement/metrics.go
Normal file
43
pkg/services/object_manager/placement/metrics.go
Normal file
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@ -0,0 +1,43 @@
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package placement
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import (
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"errors"
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"strings"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
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)
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const (
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attrPrefix = "$attribute:"
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)
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type Metric interface {
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CalculateValue(*netmap.NodeInfo, *netmap.NodeInfo) int
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}
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func ParseMetric(raw string) (Metric, error) {
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if attr, found := strings.CutPrefix(raw, attrPrefix); found {
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return NewAttributeMetric(attr), nil
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}
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return nil, errors.New("unsupported priority metric")
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}
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// attributeMetric describes priority metric based on attribute.
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type attributeMetric struct {
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attribute string
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}
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// CalculateValue return [0] if from and to contains attribute attributeMetric.attribute and
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// the value of attribute is the same. In other case return [1].
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func (am *attributeMetric) CalculateValue(from *netmap.NodeInfo, to *netmap.NodeInfo) int {
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fromAttr := from.Attribute(am.attribute)
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toAttr := to.Attribute(am.attribute)
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if len(fromAttr) > 0 && len(toAttr) > 0 && fromAttr == toAttr {
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return 0
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}
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return 1
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}
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func NewAttributeMetric(attr string) Metric {
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return &attributeMetric{attribute: attr}
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}
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@ -3,6 +3,7 @@ package placement
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import (
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"errors"
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"fmt"
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"slices"
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"sync"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/network"
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@ -23,6 +24,11 @@ type Builder interface {
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BuildPlacement(cid.ID, *oid.ID, netmap.PlacementPolicy) ([][]netmap.NodeInfo, error)
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}
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type NodeState interface {
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// LocalNodeInfo return current node state in FrostFS API v2 NodeInfo structure.
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LocalNodeInfo() *netmap.NodeInfo
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}
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// Option represents placement traverser option.
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type Option func(*cfg)
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@ -50,6 +56,10 @@ type cfg struct {
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policy netmap.PlacementPolicy
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builder Builder
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metrics []Metric
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nodeState NodeState
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}
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const invalidOptsMsg = "invalid traverser options"
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@ -99,7 +109,22 @@ func NewTraverser(opts ...Option) (*Traverser, error) {
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}
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var rem []int
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if cfg.flatSuccess != nil {
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if len(cfg.metrics) > 0 && cfg.nodeState != nil {
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rem = defaultCopiesVector(cfg.policy)
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var unsortedVector []netmap.NodeInfo
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var regularVector []netmap.NodeInfo
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for i := range rem {
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unsortedVector = append(unsortedVector, ns[i][:rem[i]]...)
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regularVector = append(regularVector, ns[i][rem[i]:]...)
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}
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rem = []int{-1, -1}
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sortedVector, err := sortVector(cfg, unsortedVector)
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if err != nil {
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return nil, err
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}
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ns = [][]netmap.NodeInfo{sortedVector, regularVector}
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} else if cfg.flatSuccess != nil {
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ns = flatNodes(ns)
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rem = []int{int(*cfg.flatSuccess)}
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} else {
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@ -157,6 +182,35 @@ func flatNodes(ns [][]netmap.NodeInfo) [][]netmap.NodeInfo {
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return [][]netmap.NodeInfo{flat}
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}
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type nodeMetrics struct {
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index int
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metrics []int
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}
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func sortVector(cfg *cfg, unsortedVector []netmap.NodeInfo) ([]netmap.NodeInfo, error) {
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nm := make([]nodeMetrics, len(unsortedVector))
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node := cfg.nodeState.LocalNodeInfo()
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for i := range unsortedVector {
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m := make([]int, len(cfg.metrics))
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for j, pm := range cfg.metrics {
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m[j] = pm.CalculateValue(node, &unsortedVector[i])
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}
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nm[i] = nodeMetrics{
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index: i,
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metrics: m,
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}
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}
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slices.SortFunc(nm, func(a, b nodeMetrics) int {
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return slices.Compare(a.metrics, b.metrics)
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})
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sortedVector := make([]netmap.NodeInfo, len(unsortedVector))
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for i := range unsortedVector {
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sortedVector[i] = unsortedVector[nm[i].index]
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}
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return sortedVector, nil
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}
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// Node is a descriptor of storage node with information required for intra-container communication.
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type Node struct {
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addresses network.AddressGroup
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@ -322,3 +376,17 @@ func WithCopyNumbers(v []uint32) Option {
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c.copyNumbers = v
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}
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}
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// WithPriorityMetrics use provided priority metrics to sort nodes.
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func WithPriorityMetrics(m []Metric) Option {
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return func(c *cfg) {
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c.metrics = m
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}
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}
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// WithNodeState provide state of the current node.
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func WithNodeState(s NodeState) Option {
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return func(c *cfg) {
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c.nodeState = s
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}
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}
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@ -22,7 +22,9 @@ func (b testBuilder) BuildPlacement(cid.ID, *oid.ID, netmap.PlacementPolicy) ([]
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}
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func testNode(v uint32) (n netmap.NodeInfo) {
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n.SetNetworkEndpoints("/ip4/0.0.0.0/tcp/" + strconv.Itoa(int(v)))
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ip := "/ip4/0.0.0.0/tcp/" + strconv.Itoa(int(v))
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n.SetNetworkEndpoints(ip)
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n.SetPublicKey([]byte(ip))
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return n
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}
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@ -40,7 +42,15 @@ func copyVectors(v [][]netmap.NodeInfo) [][]netmap.NodeInfo {
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return vc
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}
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func testPlacement(ss, rs []int) ([][]netmap.NodeInfo, container.Container) {
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func testPlacement(ss []int, rs []int) ([][]netmap.NodeInfo, container.Container) {
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return placement(ss, rs, nil)
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}
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func testECPlacement(ss []int, ec [][]int) ([][]netmap.NodeInfo, container.Container) {
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return placement(ss, nil, ec)
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}
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func placement(ss []int, rs []int, ec [][]int) ([][]netmap.NodeInfo, container.Container) {
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nodes := make([][]netmap.NodeInfo, 0, len(rs))
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replicas := make([]netmap.ReplicaDescriptor, 0, len(rs))
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num := uint32(0)
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@ -56,7 +66,12 @@ func testPlacement(ss, rs []int) ([][]netmap.NodeInfo, container.Container) {
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nodes = append(nodes, ns)
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var rd netmap.ReplicaDescriptor
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rd.SetNumberOfObjects(uint32(rs[i]))
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if len(rs) > 0 {
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rd.SetNumberOfObjects(uint32(rs[i]))
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} else {
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rd.SetECDataCount(uint32(ec[i][0]))
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rd.SetECParityCount(uint32(ec[i][1]))
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}
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replicas = append(replicas, rd)
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}
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@ -134,7 +149,7 @@ func TestTraverserObjectScenarios(t *testing.T) {
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err = n.FromIterator(netmapcore.Node(nodes[1][0]))
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require.NoError(t, err)
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require.Equal(t, []Node{{addresses: n}}, tr.Next())
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require.Equal(t, []Node{{addresses: n, key: []byte("/ip4/0.0.0.0/tcp/5")}}, tr.Next())
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})
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t.Run("put scenario", func(t *testing.T) {
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@ -275,3 +290,268 @@ func TestTraverserRemValues(t *testing.T) {
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})
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}
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}
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type nodeState struct {
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node *netmap.NodeInfo
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}
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func (n *nodeState) LocalNodeInfo() *netmap.NodeInfo {
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return n.node
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}
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func TestTraverserPriorityMetrics(t *testing.T) {
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t.Run("one rep one metric", func(t *testing.T) {
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selectors := []int{4}
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replicas := []int{3}
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nodes, cnr := testPlacement(selectors, replicas)
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// Node_0, PK - ip4/0.0.0.0/tcp/0
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nodes[0][0].SetAttribute("ClusterName", "A")
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// Node_1, PK - ip4/0.0.0.0/tcp/1
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nodes[0][1].SetAttribute("ClusterName", "A")
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// Node_2, PK - ip4/0.0.0.0/tcp/2
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nodes[0][2].SetAttribute("ClusterName", "B")
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// Node_3, PK - ip4/0.0.0.0/tcp/3
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nodes[0][3].SetAttribute("ClusterName", "B")
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sdkNode := testNode(5)
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sdkNode.SetAttribute("ClusterName", "B")
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nodesCopy := copyVectors(nodes)
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m := []Metric{NewAttributeMetric("ClusterName")}
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tr, err := NewTraverser(
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ForContainer(cnr),
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UseBuilder(&testBuilder{
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vectors: nodesCopy,
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}),
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WithoutSuccessTracking(),
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WithPriorityMetrics(m),
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WithNodeState(&nodeState{
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node: &sdkNode,
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}),
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)
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require.NoError(t, err)
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// Without priority metric `ClusterName` the order will be:
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// [ {Node_0 A}, {Node_1 A}, {Node_2 B}, {Node_3 B}]
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// With priority metric `ClusterName` and current node in cluster B
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// the order should be:
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// [ {Node_2 B}, {Node_0 A}, {Node_1 A}, {Node_3 B}]
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next := tr.Next()
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require.NotNil(t, next)
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require.Equal(t, 3, len(next))
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require.Equal(t, "/ip4/0.0.0.0/tcp/2", string(next[0].PublicKey()))
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require.Equal(t, "/ip4/0.0.0.0/tcp/0", string(next[1].PublicKey()))
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require.Equal(t, "/ip4/0.0.0.0/tcp/1", string(next[2].PublicKey()))
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next = tr.Next()
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// The last node is
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require.Equal(t, 1, len(next))
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require.Equal(t, "/ip4/0.0.0.0/tcp/3", string(next[0].PublicKey()))
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next = tr.Next()
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require.Nil(t, next)
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})
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t.Run("two reps two metrics", func(t *testing.T) {
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selectors := []int{3, 3}
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replicas := []int{2, 2}
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nodes, cnr := testPlacement(selectors, replicas)
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// REPLICA #1
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// Node_0, PK - ip4/0.0.0.0/tcp/0
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nodes[0][0].SetAttribute("ClusterName", "A")
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nodes[0][0].SetAttribute("UN-LOCODE", "RU LED")
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|
||||
// Node_1, PK - ip4/0.0.0.0/tcp/1
|
||||
nodes[0][1].SetAttribute("ClusterName", "A")
|
||||
nodes[0][1].SetAttribute("UN-LOCODE", "FI HEL")
|
||||
|
||||
// Node_2, PK - ip4/0.0.0.0/tcp/2
|
||||
nodes[0][2].SetAttribute("ClusterName", "A")
|
||||
nodes[0][2].SetAttribute("UN-LOCODE", "RU LED")
|
||||
|
||||
// REPLICA #2
|
||||
// Node_3 ip4/0.0.0.0/tcp/3
|
||||
nodes[1][0].SetAttribute("ClusterName", "B")
|
||||
nodes[1][0].SetAttribute("UN-LOCODE", "RU MOW")
|
||||
|
||||
// Node_4, PK - ip4/0.0.0.0/tcp/4
|
||||
nodes[1][1].SetAttribute("ClusterName", "B")
|
||||
nodes[1][1].SetAttribute("UN-LOCODE", "RU DME")
|
||||
|
||||
// Node_5, PK - ip4/0.0.0.0/tcp/5
|
||||
nodes[1][2].SetAttribute("ClusterName", "B")
|
||||
nodes[1][2].SetAttribute("UN-LOCODE", "RU MOW")
|
||||
|
||||
sdkNode := testNode(9)
|
||||
sdkNode.SetAttribute("ClusterName", "B")
|
||||
sdkNode.SetAttribute("UN-LOCODE", "RU DME")
|
||||
|
||||
nodesCopy := copyVectors(nodes)
|
||||
|
||||
m := []Metric{
|
||||
NewAttributeMetric("ClusterName"),
|
||||
NewAttributeMetric("UN-LOCODE"),
|
||||
}
|
||||
|
||||
tr, err := NewTraverser(
|
||||
ForContainer(cnr),
|
||||
UseBuilder(&testBuilder{
|
||||
vectors: nodesCopy,
|
||||
}),
|
||||
WithoutSuccessTracking(),
|
||||
WithPriorityMetrics(m),
|
||||
WithNodeState(&nodeState{
|
||||
node: &sdkNode,
|
||||
}),
|
||||
)
|
||||
require.NoError(t, err)
|
||||
|
||||
// Check that nodes in the same cluster and
|
||||
// in the same location should be the first in slice.
|
||||
// Nodes which are follow criteria but stay outside the replica
|
||||
// should be in the next slice.
|
||||
|
||||
next := tr.Next()
|
||||
require.Equal(t, 4, len(next))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/4", string(next[0].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/3", string(next[1].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/0", string(next[2].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/1", string(next[3].PublicKey()))
|
||||
|
||||
next = tr.Next()
|
||||
require.Equal(t, 2, len(next))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/2", string(next[0].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/5", string(next[1].PublicKey()))
|
||||
|
||||
next = tr.Next()
|
||||
require.Nil(t, next)
|
||||
|
||||
sdkNode.SetAttribute("ClusterName", "B")
|
||||
sdkNode.SetAttribute("UN-LOCODE", "RU MOW")
|
||||
|
||||
nodesCopy = copyVectors(nodes)
|
||||
|
||||
tr, err = NewTraverser(
|
||||
ForContainer(cnr),
|
||||
UseBuilder(&testBuilder{
|
||||
vectors: nodesCopy,
|
||||
}),
|
||||
WithoutSuccessTracking(),
|
||||
WithPriorityMetrics(m),
|
||||
WithNodeState(&nodeState{
|
||||
node: &sdkNode,
|
||||
}),
|
||||
)
|
||||
require.NoError(t, err)
|
||||
|
||||
next = tr.Next()
|
||||
require.Equal(t, 4, len(next))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/3", string(next[0].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/4", string(next[1].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/0", string(next[2].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/1", string(next[3].PublicKey()))
|
||||
|
||||
next = tr.Next()
|
||||
require.Equal(t, 2, len(next))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/2", string(next[0].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/5", string(next[1].PublicKey()))
|
||||
|
||||
next = tr.Next()
|
||||
require.Nil(t, next)
|
||||
|
||||
sdkNode.SetAttribute("ClusterName", "A")
|
||||
sdkNode.SetAttribute("UN-LOCODE", "RU LED")
|
||||
|
||||
nodesCopy = copyVectors(nodes)
|
||||
|
||||
tr, err = NewTraverser(
|
||||
ForContainer(cnr),
|
||||
UseBuilder(&testBuilder{
|
||||
vectors: nodesCopy,
|
||||
}),
|
||||
WithoutSuccessTracking(),
|
||||
WithPriorityMetrics(m),
|
||||
WithNodeState(&nodeState{
|
||||
node: &sdkNode,
|
||||
}),
|
||||
)
|
||||
require.NoError(t, err)
|
||||
|
||||
next = tr.Next()
|
||||
require.Equal(t, 4, len(next))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/0", string(next[0].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/1", string(next[1].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/3", string(next[2].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/4", string(next[3].PublicKey()))
|
||||
|
||||
next = tr.Next()
|
||||
require.Equal(t, 2, len(next))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/2", string(next[0].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/5", string(next[1].PublicKey()))
|
||||
|
||||
next = tr.Next()
|
||||
require.Nil(t, next)
|
||||
})
|
||||
|
||||
t.Run("ec container", func(t *testing.T) {
|
||||
selectors := []int{4}
|
||||
ec := [][]int{{2, 1}}
|
||||
|
||||
nodes, cnr := testECPlacement(selectors, ec)
|
||||
|
||||
// Node_0, PK - ip4/0.0.0.0/tcp/0
|
||||
nodes[0][0].SetAttribute("ClusterName", "A")
|
||||
// Node_1, PK - ip4/0.0.0.0/tcp/1
|
||||
nodes[0][1].SetAttribute("ClusterName", "A")
|
||||
// Node_2, PK - ip4/0.0.0.0/tcp/2
|
||||
nodes[0][2].SetAttribute("ClusterName", "B")
|
||||
// Node_3, PK - ip4/0.0.0.0/tcp/3
|
||||
nodes[0][3].SetAttribute("ClusterName", "B")
|
||||
|
||||
sdkNode := testNode(5)
|
||||
sdkNode.SetAttribute("ClusterName", "B")
|
||||
|
||||
nodesCopy := copyVectors(nodes)
|
||||
|
||||
m := []Metric{NewAttributeMetric("ClusterName")}
|
||||
|
||||
tr, err := NewTraverser(
|
||||
ForContainer(cnr),
|
||||
UseBuilder(&testBuilder{
|
||||
vectors: nodesCopy,
|
||||
}),
|
||||
WithoutSuccessTracking(),
|
||||
WithPriorityMetrics(m),
|
||||
WithNodeState(&nodeState{
|
||||
node: &sdkNode,
|
||||
}),
|
||||
)
|
||||
require.NoError(t, err)
|
||||
|
||||
// Without priority metric `ClusterName` the order will be:
|
||||
// [ {Node_0 A}, {Node_1 A}, {Node_2 B}, {Node_3 B}]
|
||||
// With priority metric `ClusterName` and current node in cluster B
|
||||
// the order should be:
|
||||
// [ {Node_2 B}, {Node_0 A}, {Node_1 A}, {Node_3 B}]
|
||||
next := tr.Next()
|
||||
require.NotNil(t, next)
|
||||
require.Equal(t, 3, len(next))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/2", string(next[0].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/0", string(next[1].PublicKey()))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/1", string(next[2].PublicKey()))
|
||||
|
||||
next = tr.Next()
|
||||
// The last node is
|
||||
require.Equal(t, 1, len(next))
|
||||
require.Equal(t, "/ip4/0.0.0.0/tcp/3", string(next[0].PublicKey()))
|
||||
|
||||
next = tr.Next()
|
||||
require.Nil(t, next)
|
||||
})
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue