frostfs-node/pkg/services/audit/auditor/pop.go

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package auditor
import (
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
"git.frostfs.info/TrueCloudLab/tzhash/tz"
"go.uber.org/zap"
)
const (
hashRangeNumber = 4
minGamePayloadSize = hashRangeNumber * tz.Size
)
func (c *Context) executePoP() {
c.buildCoverage()
c.report.SetPlacementCounters(
c.counters.hit,
c.counters.miss,
c.counters.fail,
)
}
func (c *Context) buildCoverage() {
policy := c.task.ContainerStructure().PlacementPolicy()
// select random member from another storage group
// and process all placement vectors
c.iterateSGMembersPlacementRand(func(id oid.ID, ind int, nodes []netmap.NodeInfo) bool {
c.processObjectPlacement(id, nodes, policy.ReplicaNumberByIndex(ind))
return c.containerCovered()
})
}
func (c *Context) containerCovered() bool {
// number of container nodes can be calculated once
return c.cnrNodesNum <= len(c.pairedNodes)
}
func (c *Context) processObjectPlacement(id oid.ID, nodes []netmap.NodeInfo, replicas uint32) {
var (
ok uint32
optimal bool
unpairedCandidate1, unpairedCandidate2 = -1, -1
pairedCandidate = -1
)
var getHeaderPrm GetHeaderPrm
getHeaderPrm.OID = id
getHeaderPrm.CID = c.task.ContainerID()
getHeaderPrm.NodeIsRelay = false
for i := 0; ok < replicas && i < len(nodes); i++ {
getHeaderPrm.Node = nodes[i]
// try to get object header from node
hdr, err := c.cnrCom.GetHeader(c.task.AuditContext(), getHeaderPrm)
if err != nil {
c.log.Debug("could not get object header from candidate",
zap.Stringer("id", id),
zap.String("error", err.Error()),
)
continue
}
c.updateHeadResponses(hdr)
// increment success counter
ok++
// update optimal flag
optimal = ok == replicas && uint32(i) < replicas
// exclude small objects from coverage
if c.objectSize(id) < minGamePayloadSize {
continue
}
// update potential candidates to be paired
if _, ok := c.pairedNodes[nodes[i].Hash()]; !ok {
if unpairedCandidate1 < 0 {
unpairedCandidate1 = i
} else if unpairedCandidate2 < 0 {
unpairedCandidate2 = i
}
} else if pairedCandidate < 0 {
pairedCandidate = i
}
}
if optimal {
c.counters.hit++
} else if ok == replicas {
c.counters.miss++
} else {
c.counters.fail++
}
if unpairedCandidate1 >= 0 {
if unpairedCandidate2 >= 0 {
c.composePair(id, nodes[unpairedCandidate1], nodes[unpairedCandidate2])
} else if pairedCandidate >= 0 {
c.composePair(id, nodes[unpairedCandidate1], nodes[pairedCandidate])
}
}
}
func (c *Context) composePair(id oid.ID, n1, n2 netmap.NodeInfo) {
c.pairs = append(c.pairs, gamePair{
n1: n1,
n2: n2,
id: id,
})
c.pairedNodes[n1.Hash()] = &pairMemberInfo{
node: n1,
}
c.pairedNodes[n2.Hash()] = &pairMemberInfo{
node: n2,
}
}
func (c *Context) iterateSGMembersPlacementRand(f func(oid.ID, int, []netmap.NodeInfo) bool) {
// iterate over storage groups members for all storage groups (one by one)
// with randomly shuffled members
c.iterateSGMembersRand(func(id oid.ID) bool {
// build placement vector for the current object
nn, err := c.buildPlacement(id)
if err != nil {
c.log.Debug("could not build placement for object",
zap.Stringer("id", id),
zap.String("error", err.Error()),
)
return false
}
for i, nodes := range nn {
if f(id, i, nodes) {
return true
}
}
return false
})
}
func (c *Context) iterateSGMembersRand(f func(oid.ID) bool) {
c.iterateSGInfo(func(members []oid.ID) bool {
ln := len(members)
processed := make(map[uint64]struct{}, ln-1)
for len(processed) < ln {
ind := nextRandUint64(uint64(ln), processed)
processed[ind] = struct{}{}
if f(members[ind]) {
return true
}
}
return false
})
}
func (c *Context) iterateSGInfo(f func([]oid.ID) bool) {
c.sgMembersMtx.RLock()
defer c.sgMembersMtx.RUnlock()
// we can add randomization like for SG members,
// but list of storage groups is already expected
// to be shuffled since it is a Search response
// with unpredictable order
for i := range c.sgMembersCache {
if f(c.sgMembersCache[i]) {
return
}
}
}