47 lines
1.4 KiB
Go
47 lines
1.4 KiB
Go
package placementrouter
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import (
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"bytes"
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"fmt"
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netmapcore "github.com/TrueCloudLab/frostfs-node/pkg/core/netmap"
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loadroute "github.com/TrueCloudLab/frostfs-node/pkg/services/container/announcement/load/route"
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"github.com/TrueCloudLab/frostfs-sdk-go/container"
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)
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// NextStage composes container nodes for the container and epoch from a,
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// and returns the list of nodes with maximum weight (one from each vector).
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//
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// If passed route has more than one point, then endpoint of the route is reached.
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//
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// The traversed route is not checked, it is assumed to be correct.
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func (b *Builder) NextStage(a container.SizeEstimation, passed []loadroute.ServerInfo) ([]loadroute.ServerInfo, error) {
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if len(passed) > 1 {
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return nil, nil
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}
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cnr := a.Container()
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placement, err := b.placementBuilder.BuildPlacement(a.Epoch(), cnr)
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if err != nil {
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return nil, fmt.Errorf("could not build placement %s: %w", cnr, err)
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}
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res := make([]loadroute.ServerInfo, 0, len(placement))
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for i := range placement {
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if len(placement[i]) == 0 {
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continue
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}
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if len(passed) == 1 && bytes.Equal(passed[0].PublicKey(), placement[i][0].PublicKey()) {
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// add nil element so the announcement will be saved in local memory
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res = append(res, nil)
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} else {
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// add element with remote node to send announcement to
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res = append(res, netmapcore.Node(placement[i][0]))
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}
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}
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return res, nil
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}
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