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[#31] placement: Fix incorrect selectors processing 

In previous implementation traverser worked like all counts of all selectors
are equal to counts of corresponding replicas. Make traverser to take into
account select count of all replicas.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
remotes/KirillovDenis/release/v0.21.1
Leonard Lyubich 2020-09-18 18:14:26 +03:00 committed by Alex Vanin
parent e7925fbc1c
commit f7c685f682
2 changed files with 181 additions and 68 deletions
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94
pkg/services/object_manager/placement/traverser.go
View File

@ -29,11 +29,9 @@ type Option func(*cfg)
type Traverser struct {
mtx *sync.RWMutex
rem int
nextI, nextJ int
vectors []netmap.Nodes
rem []int
}
type cfg struct {
@ -46,11 +44,14 @@ type cfg struct {
builder Builder
}
const invalidOptsMsg = "invalid traverser options"
var errNilBuilder = errors.New("placement builder is nil")
var errNilPolicy = errors.New("placement policy is nil")
func defaultCfg() *cfg {
return &cfg{
rem: 1,
addr: object.NewAddress(),
}
}
@ -66,7 +67,9 @@ func NewTraverser(opts ...Option) (*Traverser, error) {
}
if cfg.builder == nil {
return nil, errors.Wrap(errNilBuilder, "incomplete traverser options")
return nil, errors.Wrap(errNilBuilder, invalidOptsMsg)
} else if cfg.policy == nil {
return nil, errors.Wrap(errNilPolicy, invalidOptsMsg)
}
ns, err := cfg.builder.BuildPlacement(cfg.addr, cfg.policy)
@ -74,9 +77,22 @@ func NewTraverser(opts ...Option) (*Traverser, error) {
return nil, errors.Wrap(err, "could not build placement")
}
ss := cfg.policy.GetSelectors()
rem := make([]int, 0, len(ss))
for i := range ss {
cnt := cfg.rem
if cnt == 0 {
cnt = int(ss[i].GetCount())
}
rem = append(rem, cnt)
}
return &Traverser{
mtx: new(sync.RWMutex),
rem: cfg.rem,
rem: rem,
vectors: ns,
}, nil
}
@ -84,41 +100,73 @@ func NewTraverser(opts ...Option) (*Traverser, error) {
// Next returns next unprocessed address of the object placement.
//
// Returns nil if no nodes left or traversal operation succeeded.
func (t *Traverser) Next() *network.Address {
func (t *Traverser) Next() []*network.Address {
t.mtx.Lock()
defer t.mtx.Unlock()
if t.rem == 0 || t.nextI == len(t.vectors) {
t.skipEmptyVectors()
if len(t.vectors) == 0 {
return nil
} else if len(t.vectors[0]) < t.rem[0] {
return nil
}
addr, err := network.AddressFromString(t.vectors[t.nextI][t.nextJ].NetworkAddress())
if err != nil {
// TODO: log error
count := t.rem[0]
if count < 0 {
count = len(t.vectors[0])
}
if t.nextJ++; t.nextJ == len(t.vectors[t.nextI]) {
t.nextJ = 0
t.nextI++
addrs := make([]*network.Address, 0, count)
for i := 0; i < count; i++ {
addr, err := network.AddressFromString(t.vectors[0][i].NetworkAddress())
if err != nil {
// TODO: log error
return nil
}
addrs = append(addrs, addr)
}
return addr
t.vectors[0] = t.vectors[0][count:]
return addrs
}
func (t *Traverser) skipEmptyVectors() {
for i := 0; i < len(t.vectors); i++ { // don't use range, slice changes in body
if len(t.vectors[i]) == 0 && t.rem[i] <= 0 || t.rem[0] == 0 {
t.vectors = append(t.vectors[:i], t.vectors[i+1:]...)
t.rem = append(t.rem[:i], t.rem[i+1:]...)
i--
} else {
break
}
}
}
// SubmitSuccess writes single succeeded node operation.
func (t *Traverser) SubmitSuccess() {
t.mtx.Lock()
t.rem--
if len(t.rem) > 0 {
t.rem[0]--
}
t.mtx.Unlock()
}
// Success returns true if traversal operation succeeded.
func (t *Traverser) Success() bool {
t.mtx.RLock()
s := t.rem <= 0
t.mtx.RUnlock()
defer t.mtx.RUnlock()
return s
for i := range t.rem {
if t.rem[i] > 0 {
return false
}
}
return true
}
// UseBuilder is a placement builder setting option.
@ -146,12 +194,6 @@ func UseNetworkMap(nm *netmap.Netmap) Option {
func ForContainer(cnr *container.Container) Option {
return func(c *cfg) {
c.policy = cnr.GetPlacementPolicy()
c.rem = 0
for _, r := range c.policy.GetReplicas() {
c.rem += int(r.GetCount())
}
c.addr.SetContainerID(container.CalculateID(cnr))
}
}

155
pkg/services/object_manager/placement/traverser_test.go
View File

@ -4,6 +4,7 @@ import (
"strconv"
"testing"
"github.com/nspcc-dev/neofs-api-go/pkg/container"
"github.com/nspcc-dev/neofs-api-go/pkg/netmap"
"github.com/nspcc-dev/neofs-api-go/pkg/object"
netmapV2 "github.com/nspcc-dev/neofs-node/pkg/morph/client/netmap"
@ -35,86 +36,156 @@ func flattenVectors(vs []netmap.Nodes) netmap.Nodes {
return v
}
func testPlacement(t *testing.T, sz []int) []netmap.Nodes {
res := make([]netmap.Nodes, 0, len(sz))
func copyVectors(v []netmap.Nodes) []netmap.Nodes {
vc := make([]netmap.Nodes, 0, len(v))
for i := range v {
ns := make(netmap.Nodes, len(v[i]))
copy(ns, v[i])
vc = append(vc, ns)
}
return vc
}
func testPlacement(t *testing.T, rs, ss []int) ([]netmap.Nodes, *container.Container) {
nodes := make([]netmap.Nodes, 0, len(rs))
selectors := make([]*netmap.Selector, 0, len(rs))
num := uint32(0)
for i := range sz {
ns := make([]netmapV2.NodeInfo, 0, sz[i])
for i := range rs {
ns := make([]netmapV2.NodeInfo, 0, rs[i])
for j := 0; j < sz[i]; j++ {
for j := 0; j < rs[i]; j++ {
ns = append(ns, testNode(num))
num++
}
res = append(res, netmap.NodesFromV2(ns))
nodes = append(nodes, netmap.NodesFromV2(ns))
s := new(netmap.Selector)
s.SetCount(uint32(ss[i]))
selectors = append(selectors, s)
}
return res
policy := new(netmap.PlacementPolicy)
policy.SetSelectors(selectors)
return nodes, container.New(container.WithPolicy(policy))
}
func TestTraverserObjectScenarios(t *testing.T) {
t.Run("search scenario", func(t *testing.T) {
nodes := testPlacement(t, []int{2, 3})
replicas := []int{2, 3}
selectors := []int{1, 2}
allNodes := flattenVectors(nodes)
nodes, cnr := testPlacement(t, replicas, selectors)
nodesCopy := copyVectors(nodes)
tr, err := NewTraverser(
UseBuilder(&testBuilder{vectors: nodes}),
ForContainer(cnr),
UseBuilder(&testBuilder{vectors: nodesCopy}),
WithoutSuccessTracking(),
)
require.NoError(t, err)
require.True(t, tr.Success())
for i := range replicas {
addrs := tr.Next()
for i := range allNodes {
require.Equal(t, allNodes[i].NetworkAddress(), tr.Next().String())
require.Len(t, addrs, len(nodes[i]))
for j, n := range nodes[i] {
require.Equal(t, n.NetworkAddress(), addrs[j].String())
}
}
require.Nil(t, tr.Next())
require.Empty(t, tr.Next())
require.True(t, tr.Success())
})
t.Run("read scenario", func(t *testing.T) {
nodes := testPlacement(t, []int{5, 3, 4})
replicas := []int{5, 3}
selectors := []int{2, 2}
allNodes := flattenVectors(nodes)
nodes, cnr := testPlacement(t, replicas, selectors)
nodesCopy := copyVectors(nodes)
tr, err := NewTraverser(
UseBuilder(&testBuilder{vectors: nodes}),
ForContainer(cnr),
UseBuilder(&testBuilder{vectors: nodesCopy}),
SuccessAfter(1),
)
require.NoError(t, err)
for i := range allNodes[:len(allNodes)-3] {
require.Equal(t, allNodes[i].NetworkAddress(), tr.Next().String())
}
fn := func(curVector int) {
for i := 0; i < replicas[curVector]; i++ {
addrs := tr.Next()
require.Len(t, addrs, 1)
require.False(t, tr.Success())
require.Equal(t, nodes[curVector][i].NetworkAddress(), addrs[0].String())
}
tr.SubmitSuccess()
require.True(t, tr.Success())
require.Nil(t, tr.Next())
})
t.Run("put scenario", func(t *testing.T) {
nodes := testPlacement(t, []int{3, 3, 3})
sucCount := 3
tr, err := NewTraverser(
UseBuilder(&testBuilder{vectors: nodes}),
SuccessAfter(sucCount),
)
require.NoError(t, err)
for i := 0; i < sucCount; i++ {
require.NotNil(t, tr.Next())
require.Empty(t, tr.Next())
require.False(t, tr.Success())
tr.SubmitSuccess()
}
require.Nil(t, tr.Next())
require.True(t, tr.Success())
for i := range replicas {
fn(i)
if i < len(replicas)-1 {
require.False(t, tr.Success())
} else {
require.True(t, tr.Success())
}
}
})
t.Run("put scenario", func(t *testing.T) {
replicas := []int{5, 3}
selectors := []int{2, 2}
nodes, cnr := testPlacement(t, replicas, selectors)
nodesCopy := copyVectors(nodes)
tr, err := NewTraverser(
ForContainer(cnr),
UseBuilder(&testBuilder{vectors: nodesCopy}),
)
require.NoError(t, err)
fn := func(curVector int) {
for i := 0; i+selectors[curVector] < replicas[curVector]; i += selectors[curVector] {
addrs := tr.Next()
require.Len(t, addrs, selectors[curVector])
for j := range addrs {
require.Equal(t, nodes[curVector][i+j].NetworkAddress(), addrs[j].String())
}
}
require.Empty(t, tr.Next())
require.False(t, tr.Success())
for i := 0; i < selectors[curVector]; i++ {
tr.SubmitSuccess()
}
}
for i := range replicas {
fn(i)
if i < len(replicas)-1 {
require.False(t, tr.Success())
} else {
require.True(t, tr.Success())
}
}
})
}