cluster

package
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 Go to latest Published: Nov 13, 2022 License: MIT Imports: 32 Imported by: 0

Documentation

Overview

Package cluster provides local access to cluster-level metadata

  • Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.

Package cluster provides common interfaces and local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Package cluster provides local access to cluster-level metadata

  • Copyright (c) 2018-2022, NVIDIA CORPORATION. All rights reserved.

Package cluster provides local access to cluster-level metadata

  • Copyright (c) 2018-2021, NVIDIA CORPORATION. All rights reserved.

Index

Constants

View Source 
const (
	XattrLOM = "user.ais.lom" // on-disk xattr name

	DumpLomEnvVar = "AIS_DUMP_LOM"
)
View Source 
const (
	Targets = iota // 0 (cluster.Targets) used as default value for NewStreamBundle
	Proxies
	AllNodes
)
View Source 
const (
	SnodeNonElectable cos.BitFlags = 1 << iota
	SnodeIC
	NodeFlagMaint
	NodeFlagDecomm
)

enum Snode.Flags

View Source 
const (
	PnamePrefix = "p["
	TnamePrefix = "t["
	SnameSuffix = "]"
)
View Source 
const (
	UponTerm     = Upon(1 << iota) // success or fail is separately provided via error
	UponProgress                   // periodic (BytesCount, ObjCount)
)

enum: when to notify

View Source 
const (
	QuiInactiveCB = QuiRes(iota) // e.g., no pending requests (NOTE: used exclusively by `quicb` callbacks)
	QuiActive                    // active (e.g., receiving data)
	QuiActiveRet                 // active that immediately breaks waiting for quiecscence
	QuiDone                      // all done
	QuiAborted                   // aborted
	QuiTimeout                   // timeout
	Quiescent                    // idle => quiescent
)
View Source 
const MaxBcastMultiplier = 2

number of broadcasting goroutines <= cmn.NumCPU() * MaxBcastMultiplier

View Source 
const NodeFlagsMaintDecomm = NodeFlagMaint | NodeFlagDecomm

Variables

This section is empty.

Functions

func EvictLomCache 

func EvictLomCache(b *Bck)

func FreeCpObjParams 

func FreeCpObjParams(a *CopyObjectParams)

func FreeLOM 

func FreeLOM(lom *LOM)

func FreeNodes 

func FreeNodes(nodes Nodes)

func FreePutObjParams 

func FreePutObjParams(a *PutObjectParams)

func HrwFQN 

func HrwFQN(bck *cmn.Bck, contentType, objName string) (fqn string, digest uint64, err error)

func HrwMpath 

func HrwMpath(uname string) (mi *fs.MountpathInfo, digest uint64, err error)

func Init 

func Init(t Target)

func MaxBcastParallel 

func MaxBcastParallel() int

func N2ID 

func N2ID(name string) string

func ParseObjLoc 

func ParseObjLoc(loc string) (tname, mpname string)

func Pname 

func Pname(pid string) string

func RegLomCacheWithHK 

func RegLomCacheWithHK(t Target)

func ResolveFQN 

func ResolveFQN(fqn string) (parsedFQN fs.ParsedFQN, hrwFQN string, err error)

func Tname 

func Tname(tid string) string

Types

type BMD 

type BMD struct {
	Ext       any       `json:"ext,omitempty"`  // within meta-version extensions
	Providers Providers `json:"providers"`      // (provider, namespace, bucket) hierarchy
	UUID      string    `json:"uuid"`           // unique & immutable
	Version   int64     `json:"version,string"` // gets incremented on every update
}

- BMD is the root of the (providers, namespaces, buckets) hierarchy - BMD (instance) can be obtained via Bowner.Get() - BMD is immutable and versioned - BMD versioning is monotonic and incremental

func (*BMD) Add 

func (m *BMD) Add(bck *Bck)

func (*BMD) Del 

func (m *BMD) Del(bck *Bck) (deleted bool)

func (*BMD) Exists 

func (m *BMD) Exists(bck *Bck, bckID uint64) (exists bool)

func (*BMD) Get 

func (m *BMD) Get(bck *Bck) (p *cmn.BucketProps, present bool)

func (*BMD) IsECUsed 

func (m *BMD) IsECUsed() (yes bool)

func (*BMD) JspOpts 

func (*BMD) JspOpts() jsp.Options

func (*BMD) Range 

func (m *BMD) Range(providerQuery *string, nsQuery *cmn.Ns, callback func(*Bck) bool)

providerQuery == nil: all providers; nsQuery == nil: all namespaces

func (*BMD) Select 

func (m *BMD) Select(qbck *cmn.QueryBcks) cmn.Bcks

func (*BMD) Set 

func (m *BMD) Set(bck *Bck, p *cmn.BucketProps)

func (*BMD) String 

func (m *BMD) String() string

func (*BMD) StringEx 

func (m *BMD) StringEx() string

type BackendProvider 

type BackendProvider interface {
	Provider() string
	MaxPageSize() uint
	CreateBucket(bck *Bck) (errCode int, err error)
	ListObjects(bck *Bck, msg *apc.LsoMsg, lst *cmn.LsoResult) (errCode int, err error)
	ListBuckets(qbck cmn.QueryBcks) (bcks cmn.Bcks, errCode int, err error)
	PutObj(r io.ReadCloser, lom *LOM) (errCode int, err error)
	DeleteObj(lom *LOM) (errCode int, err error)

	// with context
	HeadBucket(ctx context.Context, bck *Bck) (bckProps cos.StrKVs, errCode int, err error)
	HeadObj(ctx context.Context, lom *LOM) (objAttrs *cmn.ObjAttrs, errCode int, err error)
	GetObj(ctx context.Context, lom *LOM, owt cmn.OWT) (errCode int, err error)
	GetObjReader(ctx context.Context, lom *LOM) (r io.ReadCloser, expectedCksum *cos.Cksum, errCode int, err error)
}

type Bck 

type Bck cmn.Bck

func CloneBck 

func CloneBck(bck *cmn.Bck) *Bck

func InitByNameOnly 

func InitByNameOnly(bckName string, bowner Bowner) (bck *Bck, err error, errCode int)

to support s3 clients: find an already existing bucket by name (and nothing else) returns an error when name cannot be unambiguously resolved to a single bucket

func NewBck 

func NewBck(name, provider string, ns cmn.Ns, optProps ...*cmn.BucketProps) *Bck

func (*Bck) AddToQuery 

func (b *Bck) AddToQuery(q url.Values) url.Values

func (*Bck) AddUnameToQuery 

func (b *Bck) AddUnameToQuery(q url.Values, uparam string) url.Values

func (*Bck) Allow 

func (b *Bck) Allow(bit apc.AccessAttrs) error

func (*Bck) Backend 

func (b *Bck) Backend() *Bck

func (*Bck) Bucket 

func (b *Bck) Bucket() *cmn.Bck

cast *cluster.Bck => *cmn.Bck

func (*Bck) CksumConf 

func (b *Bck) CksumConf() (conf *cmn.CksumConf)

func (*Bck) Clone 

func (b *Bck) Clone() cmn.Bck

clone (*cluster.Bck | *cmn.Bck) <=> (cmn.Bck | cluster.Bck) respectively

func (*Bck) Equal 

func (b *Bck) Equal(other *Bck, sameID, sameBackend bool) bool

func (*Bck) GetNameLockPair 

func (b *Bck) GetNameLockPair() (nlp *NameLockPair)

func (*Bck) HasProvider 

func (b *Bck) HasProvider() bool

func (*Bck) Init 

func (b *Bck) Init(bowner Bowner) (err error)

when the bucket is not present in the BMD: - always returns the corresponding *DoesNotExist error - Cloud bucket: fills in the props with defaults from config - AIS bucket: sets the props to nil - Remote (Cloud or Remote AIS) bucket: caller can type-cast err.(*cmn.ErrRemoteBckNotFound) and proceed

func (*Bck) InitNoBackend 

func (b *Bck) InitNoBackend(bowner Bowner) error

func (*Bck) IsAIS 

func (b *Bck) IsAIS() bool

func (*Bck) IsCloud 

func (b *Bck) IsCloud() bool

func (*Bck) IsEmpty 

func (b *Bck) IsEmpty() bool

func (*Bck) IsHDFS 

func (b *Bck) IsHDFS() bool

func (*Bck) IsHTTP 

func (b *Bck) IsHTTP() bool

func (*Bck) IsQuery 

func (b *Bck) IsQuery() bool

func (*Bck) IsRemote 

func (b *Bck) IsRemote() bool

func (*Bck) IsRemoteAIS 

func (b *Bck) IsRemoteAIS() bool

func (*Bck) MakeUname 

func (b *Bck) MakeUname(name string) string

func (*Bck) MaskBID 

func (b *Bck) MaskBID(i int64) uint64

func (*Bck) RemoteBck 

func (b *Bck) RemoteBck() *cmn.Bck

func (*Bck) String 

func (b *Bck) String() string

func (*Bck) Validate 

func (b *Bck) Validate() error

func (*Bck) VersionConf 

func (b *Bck) VersionConf() cmn.VersionConf

type Bowner 

type Bowner interface {
	Get() (bmd *BMD)
}

interface to Get current BMD instance (for implementation, see ais/bucketmeta.go)

type Buckets 

type Buckets map[string]*cmn.BucketProps

interface to Get current BMD instance (for implementation, see ais/bucketmeta.go)

type CT 

type CT struct {
	// contains filtered or unexported fields
}

func NewCTFromBO 

func NewCTFromBO(bck *cmn.Bck, objName string, b Bowner, ctType ...string) (ct *CT, err error)

func NewCTFromFQN 

func NewCTFromFQN(fqn string, b Bowner) (ct *CT, err error)

func NewCTFromLOM 

func NewCTFromLOM(lom *LOM, ctType string) *CT

Construct CT from LOM and change ContentType and FQN

func (*CT) Bck 

func (ct *CT) Bck() *Bck

func (*CT) Bucket 

func (ct *CT) Bucket() *cmn.Bck

func (*CT) CacheIdx 

func (ct *CT) CacheIdx() int

func (*CT) Clone 

func (ct *CT) Clone(ctType string) *CT

Clone CT and change ContentType and FQN

func (*CT) ContentType 

func (ct *CT) ContentType() string

func (*CT) FQN 

func (ct *CT) FQN() string

func (*CT) LoadFromFS 

func (ct *CT) LoadFromFS() error

func (*CT) Lock 

func (ct *CT) Lock(exclusive bool)

func (*CT) Make 

func (ct *CT) Make(toType string, pref ...string) string

func (*CT) MpathInfo 

func (ct *CT) MpathInfo() *fs.MountpathInfo

func (*CT) MtimeUnix 

func (ct *CT) MtimeUnix() int64

func (*CT) ObjectName 

func (ct *CT) ObjectName() string

func (*CT) SizeBytes 

func (ct *CT) SizeBytes() int64

func (*CT) Uname 

func (ct *CT) Uname() string

func (*CT) Unlock 

func (ct *CT) Unlock(exclusive bool)

func (*CT) Write 

func (ct *CT) Write(t Target, reader io.Reader, size int64, workFQN ...string) (err error)

Save CT to local drives. If workFQN is set, it saves in two steps: first, save to workFQN; second, rename workFQN to ct.FQN. If unset, it writes directly to ct.FQN

type CopyObjectParams 

type CopyObjectParams struct {
	DM        DataMover
	DP        DP // Data Provider (optional; see Transform/Copy Bucket (TCB))
	Xact      Xact
	BckTo     *Bck
	ObjNameTo string
	Buf       []byte
}

data path: control structures and types

func AllocCpObjParams 

func AllocCpObjParams() (a *CopyObjectParams)

type DP 

type DP interface {
	Reader(lom *LOM) (reader cos.ReadOpenCloser, objMeta cmn.ObjAttrsHolder, err error)
}

data provider

type DataMover 

type DataMover interface {
	RegRecv() error
	GetXact() Xact
	Open()
	Close(err error)
	UnregRecv()
	Send(obj *transport.Obj, roc cos.ReadOpenCloser, tsi *Snode) error
	ACK(hdr transport.ObjHdr, cb transport.ObjSentCB, tsi *Snode) error
	OWT() cmn.OWT
}

data path: control structures and types

type LDP 

type LDP struct{}

func (*LDP) Reader 

func (*LDP) Reader(lom *LOM) (cos.ReadOpenCloser, cmn.ObjAttrsHolder, error)

compare with etl/dp.go

type LIF 

type LIF struct {
	Uname string
	BID   uint64
	// contains filtered or unexported fields
}

LOM In Flight (LIF)

func (*LIF) CacheIdx 

func (lif *LIF) CacheIdx() int

deferred unlocking

func (*LIF) LOM 

func (lif *LIF) LOM() (lom *LOM, err error)

LIF => LOF with a check for bucket existence

func (*LIF) Unlock 

func (lif *LIF) Unlock(exclusive bool)

type LOM 

type LOM struct {
	ObjName string

	FQN    string
	HrwFQN string // (=> main replica)
	// contains filtered or unexported fields
}

func AllocLOM 

func AllocLOM(objName string) *LOM

func AllocLomFromHdr 

func AllocLomFromHdr(hdr *transport.ObjHdr) (lom *LOM, err error)

lom <= transport.ObjHdr (NOTE: caller must call freeLOM)

func (*LOM) AcquireAtimefs 

func (lom *LOM) AcquireAtimefs() error

used in tests

func (*LOM) AddCopy 

func (lom *LOM) AddCopy(copyFQN string, mpi *fs.MountpathInfo) error

NOTE: used only in tests

func (*LOM) AllowDisconnectedBackend 

func (lom *LOM) AllowDisconnectedBackend(loaded bool) (err error)

permission to overwrite objects that were previously read from: a) any remote backend that is currently not configured as the bucket's backend b) HTPP ("ht://") since it's not writable

func (*LOM) Atime 

func (lom *LOM) Atime() time.Time

func (*LOM) AtimeUnix 

func (lom *LOM) AtimeUnix() int64

func (*LOM) Bck 

func (lom *LOM) Bck() *Bck

func (*LOM) Bprops 

func (lom *LOM) Bprops() *cmn.BucketProps

func (*LOM) Bucket 

func (lom *LOM) Bucket() *cmn.Bck

func (*LOM) CacheIdx 

func (lom *LOM) CacheIdx() int

func (*LOM) Checksum 

func (lom *LOM) Checksum() *cos.Cksum

func (*LOM) CksumConf 

func (lom *LOM) CksumConf() *cmn.CksumConf

func (*LOM) CksumType 

func (lom *LOM) CksumType() string

func (*LOM) CloneMD 

func (lom *LOM) CloneMD(fqn string) *LOM

allocates and copies metadata (in particular, atime and uname)

func (*LOM) ComputeCksum 

func (lom *LOM) ComputeCksum(cksumType string) (cksum *cos.CksumHash, err error)

func (*LOM) ComputeSetCksum 

func (lom *LOM) ComputeSetCksum() (*cos.Cksum, error)

func (*LOM) Copy 

func (lom *LOM) Copy(mi *fs.MountpathInfo, buf []byte) (err error)

increment the object's num copies by (well) copying the former (compare with lom.Copy2FQN below)

func (*LOM) Copy2FQN 

func (lom *LOM) Copy2FQN(dstFQN string, buf []byte) (dst *LOM, err error)

copy object => any local destination recommended for copying between different buckets (compare with lom.Copy() above) NOTE: `lom` source must be w-locked

func (*LOM) CopyAttrs 

func (lom *LOM) CopyAttrs(oah cmn.ObjAttrsHolder, skipCksum bool)

func (*LOM) CreateFile 

func (lom *LOM) CreateFile(fqn string) (fh *os.File, err error)

(compare with cos.CreateFile)

func (*LOM) DelAllCopies 

func (lom *LOM) DelAllCopies() (err error)

func (*LOM) DelCopies 

func (lom *LOM) DelCopies(copiesFQN ...string) (err error)

func (*LOM) DelExtraCopies 

func (lom *LOM) DelExtraCopies(fqn ...string) (removed bool, err error)

DelExtraCopies deletes obj replicas that are not part of the lom.md.copies metadata (cleanup)

func (*LOM) DowngradeLock 

func (lom *LOM) DowngradeLock()

func (*LOM) ECEnabled 

func (lom *LOM) ECEnabled() bool

func (*LOM) EqCksum 

func (lom *LOM) EqCksum(cksum *cos.Cksum) bool

func (*LOM) Equal 

func (lom *LOM) Equal(rem cmn.ObjAttrsHolder) (equal bool)

LOM == remote-object equality check

func (*LOM) FromFS 

func (lom *LOM) FromFS() error

func (*LOM) FullName 

func (lom *LOM) FullName() string

see also: transport.ObjHdr.FullName()

func (*LOM) GetCopies 

func (lom *LOM) GetCopies() fs.MPI

GetCopies returns all copies (NOTE that copies include self) NOTE: caller must take a lock

func (*LOM) GetCustomKey 

func (lom *LOM) GetCustomKey(key string) (string, bool)

func (*LOM) GetCustomMD 

func (lom *LOM) GetCustomMD() cos.StrKVs

custom metadata

func (*LOM) HasCopies 

func (lom *LOM) HasCopies() bool

func (*LOM) HrwTarget 

func (lom *LOM) HrwTarget(smap *Smap) (tsi *Snode, local bool, err error)

func (*LOM) IncVersion 

func (lom *LOM) IncVersion() error

func (*LOM) InitBck 

func (lom *LOM) InitBck(bck *cmn.Bck) (err error)

func (*LOM) InitCT 

func (lom *LOM) InitCT(ct *CT)

func (*LOM) InitFQN 

func (lom *LOM) InitFQN(fqn string, expbck *cmn.Bck) (err error)

func (*LOM) IsCopy 

func (lom *LOM) IsCopy() bool

given an existing (on-disk) object, determines whether it is a _copy_ (compare with isMirror below)

func (*LOM) IsHRW 

func (lom *LOM) IsHRW() bool

func (*LOM) IsLocked 

func (lom *LOM) IsLocked() (int, bool)

func (*LOM) LBGet 

func (lom *LOM) LBGet() (fqn string)

load-balanced GET

func (*LOM) LIF 

func (lom *LOM) LIF() (lif LIF)

constructor

func (*LOM) LeastUtilNoCopy 

func (lom *LOM) LeastUtilNoCopy() (mi *fs.MountpathInfo)

returns the least utilized mountpath that does _not_ have a copy of this `lom` yet (compare with leastUtilCopy())

func (*LOM) Load 

func (lom *LOM) Load(cacheit, locked bool) (err error)
  • locked: is locked by the immediate caller (or otherwise is known to be locked); if false, try Rlock temporarily *if and only when* reading from FS

func (*LOM) LoadMetaFromFS 

func (lom *LOM) LoadMetaFromFS() error

NOTE: used in tests, ignores `dirty`

func (*LOM) Location 

func (lom *LOM) Location() string

func (*LOM) Lock 

func (lom *LOM) Lock(exclusive bool)

func (*LOM) MirrorConf 

func (lom *LOM) MirrorConf() *cmn.MirrorConf

func (*LOM) MpathInfo 

func (lom *LOM) MpathInfo() *fs.MountpathInfo

func (*LOM) NewDeferROC 

func (lom *LOM) NewDeferROC() (cos.ReadOpenCloser, error)

is called under rlock

func (*LOM) NumCopies 

func (lom *LOM) NumCopies() int

func (*LOM) ObjAttrs 

func (lom *LOM) ObjAttrs() *cmn.ObjAttrs

func (*LOM) ObjectName 

func (lom *LOM) ObjectName() string

as fs.PartsFQN

func (*LOM) Persist 

func (lom *LOM) Persist() (err error)

(caller must set atime; compare with the above)

func (*LOM) PersistMain 

func (lom *LOM) PersistMain() (err error)

(copy/paste tradeoff on purpose)

func (*LOM) Recache 

func (lom *LOM) Recache()

store new or refresh existing

func (*LOM) Remove 

func (lom *LOM) Remove(force ...bool) (err error)

func (*LOM) RenameFile 

func (lom *LOM) RenameFile(workfqn string) error

(compare with cos.Rename)

func (*LOM) RestoreToLocation 

func (lom *LOM) RestoreToLocation() (exists bool)

RestoreObjectFromAny tries to restore the object at its default location. Returns true if object exists, false otherwise TODO: locking vs concurrent restore: consider (read-lock object + write-lock meta) split

func (*LOM) SetAtimeUnix 

func (lom *LOM) SetAtimeUnix(tu int64)

func (*LOM) SetCksum 

func (lom *LOM) SetCksum(cksum *cos.Cksum)

func (*LOM) SetCustomKey 

func (lom *LOM) SetCustomKey(key, value string)

func (*LOM) SetCustomMD 

func (lom *LOM) SetCustomMD(md cos.StrKVs)

func (*LOM) SetSize 

func (lom *LOM) SetSize(size int64)

func (*LOM) SetVersion 

func (lom *LOM) SetVersion(ver string)

func (*LOM) SizeBytes 

func (lom *LOM) SizeBytes(special ...bool) int64

special a) when a new version is being created b) for usage in unit tests

func (*LOM) String 

func (lom *LOM) String() string

func (*LOM) StringEx 

func (lom *LOM) StringEx() string

func (*LOM) ToMpath 

func (lom *LOM) ToMpath() (mi *fs.MountpathInfo, isHrw bool)

must be called under w-lock returns mountpath destination to copy this object, or nil if no copying is required - checks hrw location first, and - checks copies (if any) against the current configuation and available mountpaths; - does not check `fstat` in either case (TODO: configurable or scrub);

func (*LOM) TryLock 

func (lom *LOM) TryLock(exclusive bool) bool

func (*LOM) Uname 

func (lom *LOM) Uname() string

func (*LOM) Uncache 

func (lom *LOM) Uncache(delDirty bool)

func (*LOM) Unlock 

func (lom *LOM) Unlock(exclusive bool)

func (*LOM) UpgradeLock 

func (lom *LOM) UpgradeLock() (finished bool)

func (*LOM) ValidateContentChecksum 

func (lom *LOM) ValidateContentChecksum() (err error)

ValidateDiskChecksum validates if checksum stored in lom's in-memory metadata matches object's content checksum. Use lom.ValidateMetaChecksum() to check lom's checksum vs on-disk metadata.

func (*LOM) ValidateMetaChecksum 

func (lom *LOM) ValidateMetaChecksum() error

ValidateMetaChecksum validates whether checksum stored in lom's in-memory metadata matches checksum stored on disk. Use lom.ValidateContentChecksum() to recompute and check object's content checksum.

func (*LOM) Version 

func (lom *LOM) Version(special ...bool) string

func (*LOM) VersionConf 

func (lom *LOM) VersionConf() cmn.VersionConf

func (*LOM) WritePolicy 

func (lom *LOM) WritePolicy() (p apc.WritePolicy)

type NameLockPair 

type NameLockPair struct {
	// contains filtered or unexported fields
}

func (*NameLockPair) Lock 

func (nlp *NameLockPair) Lock()

func (*NameLockPair) TryLock 

func (nlp *NameLockPair) TryLock(timeout time.Duration) (ok bool)

func (*NameLockPair) TryRLock 

func (nlp *NameLockPair) TryRLock(timeout time.Duration) (ok bool)

TODO: ensure single-time usage (no ref counting!)

func (*NameLockPair) Unlock 

func (nlp *NameLockPair) Unlock()

type Namespaces 

type Namespaces map[string]Buckets

interface to Get current BMD instance (for implementation, see ais/bucketmeta.go)

type NetInfo 

type NetInfo struct {
	Hostname string `json:"node_ip_addr"`
	Port     string `json:"daemon_port"`
	URL      string `json:"direct_url"`
	// contains filtered or unexported fields
}

Snode's networking info

func NewNetInfo 

func NewNetInfo(proto, hostname, port string) *NetInfo

func (*NetInfo) Equals 

func (ni *NetInfo) Equals(other NetInfo) bool

func (*NetInfo) String 

func (ni *NetInfo) String() string

func (*NetInfo) TCPEndpoint 

func (ni *NetInfo) TCPEndpoint() string

type Node 

type Node interface {
	Snode() *Snode
	Bowner() Bowner
	Sowner() Sowner
	ClusterStarted() bool
	NodeStarted() bool
	DataClient() *http.Client
}

type NodeMap 

type NodeMap map[string]*Snode // map of Snodes: DaeID => Snodes

func NodeMapDelta 

func NodeMapDelta(oldNodeMap, newNodeMap []NodeMap) (added, removed NodeMap)

helper to find out NodeMap "delta" or "diff"

func (NodeMap) ActiveMap 

func (m NodeMap) ActiveMap() (clone NodeMap)

func (NodeMap) ActiveNodes 

func (m NodeMap) ActiveNodes() []*Snode

func (NodeMap) Add 

func (m NodeMap) Add(snode *Snode)

func (NodeMap) Contains 

func (m NodeMap) Contains(daeID string) (exists bool)

type Nodes 

type Nodes []*Snode // slice of Snodes

func AllocNodes 

func AllocNodes(capacity int) (nodes Nodes)

func HrwTargetList 

func HrwTargetList(uname string, smap *Smap, count int) (sis Nodes, err error)

Sorts all targets in a cluster by their respective HRW (weights) in a descending order; returns resulting subset (aka slice) that has the requested length = count. Returns error if the cluster does not have enough targets. If count == length of Smap.Tmap, the function returns as many targets as possible.

type Notif 

type Notif interface {
	OnFinishedCB() func(Notif, error)
	OnProgressCB() func(Notif)
	NotifyInterval() time.Duration // notify interval in secs
	LastNotifTime() int64          // time last notified
	SetLastNotified(now int64)
	Upon(u Upon) bool
	Subscribers() []string
	ToNotifMsg() NotifMsg
}

intra-cluster notification interface

type NotifMsg 

type NotifMsg struct {
	UUID   string `json:"uuid"`    // xaction UUID
	NodeID string `json:"node_id"` // notifier node ID
	Kind   string `json:"kind"`    // xaction `Kind`
	ErrMsg string `json:"err"`     // error.Error()
	Data   []byte `json:"message"` // typed message
}

func (*NotifMsg) String 

func (msg *NotifMsg) String() (s string)

type OnFinishObj 

type OnFinishObj = func(lom *LOM, err error)

data path: control structures and types

type PromoteArgs 

type PromoteArgs struct {
	DaemonID  string `json:"tid,omitempty"` // target ID
	SrcFQN    string `json:"src,omitempty"` // source file or directory (must be absolute pathname)
	ObjName   string `json:"obj,omitempty"` // destination object name
	Recursive bool   `json:"rcr,omitempty"` // recursively promote nested dirs
	// once successfully promoted:
	OverwriteDst bool `json:"ovw,omitempty"` // overwrite destination
	DeleteSrc    bool `json:"dls,omitempty"` // remove source when (and after) successfully promoting
	// explicit request _not_ to treat the source as a potential file share
	// and _not_ to try to auto-detect if it is;
	// (auto-detection takes time, etc.)
	SrcIsNotFshare bool `json:"notshr,omitempty"` // the source is not a file share equally accessible by all targets
}

common part that's used in `api.PromoteArgs` and `PromoteParams`(server side), both

type PromoteParams 

type PromoteParams struct {
	Bck         *Bck       // destination bucket
	Cksum       *cos.Cksum // checksum to validate
	Xact        Xact       // responsible xaction
	PromoteArgs            // all of the above
}

data path: control structures and types

type Providers 

type Providers map[string]Namespaces

interface to Get current BMD instance (for implementation, see ais/bucketmeta.go)

type PutObjectParams 

type PutObjectParams struct {
	Reader     io.ReadCloser
	Cksum      *cos.Cksum // checksum to check
	Atime      time.Time
	Xact       Xact
	WorkTag    string // (=> work fqn)
	OWT        cmn.OWT
	SkipEncode bool // don't run erasure-code when finalizing
}

data path: control structures and types

func AllocPutObjParams 

func AllocPutObjParams() (a *PutObjectParams)

type QuiCB 

type QuiCB func(elapsed time.Duration) QuiRes // see enum below

type QuiRes 

type QuiRes int

type RMD 

type RMD struct {
	Ext       any      `json:"ext,omitempty"` // within meta-version extensions
	Resilver  string   `json:"resilver,omitempty"`
	TargetIDs []string `json:"target_ids,omitempty"`
	Version   int64    `json:"version"`
}

RMD aka "rebalance metadata" is used to distribute information for the next rebalance.

func (*RMD) JspOpts 

func (*RMD) JspOpts() jsp.Options

type RemAis 

type RemAis struct {
	URL   string `json:"url"`
	Alias string `json:"alias"`
	UUID  string `json:"uuid"` // Smap.UUID
	Smap  *Smap  `json:"smap"`
}

type Remotes 

type Remotes struct {
	A   []*RemAis `json:"a"`
	Ver int64     `json:"ver"`
}

type Slistener 

type Slistener interface {
	String() string
	ListenSmapChanged()
}

Smap on-change listeners

type Smap 

type Smap struct {
	Ext          any     `json:"ext,omitempty"`
	Pmap         NodeMap `json:"pmap"` // [pid => Snode]
	Primary      *Snode  `json:"proxy_si"`
	Tmap         NodeMap `json:"tmap"`          // [tid => Snode]
	UUID         string  `json:"uuid"`          // assigned once at creation time and never change
	CreationTime string  `json:"creation_time"` // creation timestamp
	Version      int64   `json:"version,string"`
}

func (*Smap) Compare 

func (m *Smap) Compare(other *Smap) (uuid string, sameOrigin, sameVersion, eq bool)

func (*Smap) CompareTargets 

func (m *Smap) CompareTargets(other *Smap) (equal bool)

func (*Smap) Count 

func (m *Smap) Count() int

func (*Smap) CountActiveProxies 

func (m *Smap) CountActiveProxies() (count int)

func (*Smap) CountActiveTargets 

func (m *Smap) CountActiveTargets() (count int)

func (*Smap) CountNonElectable 

func (m *Smap) CountNonElectable() (count int)

func (*Smap) CountProxies 

func (m *Smap) CountProxies() int

func (*Smap) CountTargets 

func (m *Smap) CountTargets() int

func (*Smap) DefaultICSize 

func (*Smap) DefaultICSize() int

func (*Smap) GetNode 

func (m *Smap) GetNode(id string) *Snode

func (*Smap) GetNodeNotMaint 

func (m *Smap) GetNodeNotMaint(sid string) (si *Snode)

not nil when present and _not_ in maintenance (compare w/ PresentInMaint)

func (*Smap) GetProxy 

func (m *Smap) GetProxy(pid string) *Snode

func (*Smap) GetRandProxy 

func (m *Smap) GetRandProxy(excludePrimary bool) (si *Snode, err error)

func (*Smap) GetRandTarget 

func (m *Smap) GetRandTarget() (tsi *Snode, err error)

func (*Smap) GetTarget 

func (m *Smap) GetTarget(sid string) *Snode

func (*Smap) ICCount 

func (m *Smap) ICCount() int

func (*Smap) InitDigests 

func (m *Smap) InitDigests()

func (*Smap) IsDuplicate 

func (m *Smap) IsDuplicate(nsi *Snode) (osi *Snode, err error)

func (*Smap) IsIC 

func (m *Smap) IsIC(psi *Snode) (ok bool)

func (*Smap) IsPrimary 

func (m *Smap) IsPrimary(si *Snode) bool

func (*Smap) JspOpts 

func (*Smap) JspOpts() jsp.Options

func (*Smap) NewTmap 

func (m *Smap) NewTmap(tids []string) (tmap NodeMap, err error)

func (*Smap) NonElectable 

func (m *Smap) NonElectable(psi *Snode) (ok bool)

func (*Smap) PresentInMaint 

func (m *Smap) PresentInMaint(si *Snode) (ok bool)

true when present and in maintenance (compare w/ GetNodeNotMaint)

func (*Smap) StrIC 

func (m *Smap) StrIC(node *Snode) string

func (*Smap) String 

func (m *Smap) String() string

func (*Smap) StringEx 

func (m *Smap) StringEx() string

type SmapListeners 

type SmapListeners interface {
	Reg(sl Slistener)
	Unreg(sl Slistener)
}

type Snode 

type Snode struct {
	Ext        any        `json:"ext,omitempty"` // within meta-version extensions
	LocalNet   *net.IPNet `json:"-"`
	PubNet     NetInfo    `json:"public_net"`        // cmn.NetPublic
	DataNet    NetInfo    `json:"intra_data_net"`    // cmn.NetIntraData
	ControlNet NetInfo    `json:"intra_control_net"` // cmn.NetIntraControl
	DaeType    string     `json:"daemon_type"`       // "target" or "proxy"
	DaeID      string     `json:"daemon_id"`

	Flags cos.BitFlags `json:"flags"` // enum { SnodeNonElectable, SnodeIC, ... }
	// contains filtered or unexported fields
}

Snode - a node (gateway or target) in a cluster

func HrwIC 

func HrwIC(smap *Smap, uuid string) (pi *Snode, err error)

func HrwProxy 

func HrwProxy(smap *Smap, idToSkip string) (pi *Snode, err error)

func HrwTarget 

func HrwTarget(uname string, smap *Smap) (si *Snode, err error)

func HrwTargetAll 

func HrwTargetAll(uname string, smap *Smap) (si *Snode, err error)

Include targets in maintenance

func HrwTargetTask 

func HrwTargetTask(uuid string, smap *Smap) (si *Snode, err error)

Returns a target for a given task. E.g. usage: list objects in a cloud bucket (we want only one target to do it).

func NewSnode 

func NewSnode(id, daeType string, publicNet, intraControlNet, intraDataNet NetInfo) (snode *Snode)

func (*Snode) Clone 

func (d *Snode) Clone() *Snode

func (*Snode) Digest 

func (d *Snode) Digest() uint64

func (*Snode) Equals 

func (d *Snode) Equals(o *Snode) (eq bool)

func (*Snode) ID 

func (d *Snode) ID() string

func (*Snode) Init 

func (d *Snode) Init(id, daeType string)

func (*Snode) IsAnySet 

func (d *Snode) IsAnySet(flags cos.BitFlags) bool

node flags

func (*Snode) IsProxy 

func (d *Snode) IsProxy() bool

func (*Snode) IsTarget 

func (d *Snode) IsTarget() bool

func (*Snode) Name 

func (d *Snode) Name() string

func (*Snode) SetName 

func (d *Snode) SetName()

func (*Snode) String 

func (d *Snode) String() string

func (*Snode) StringEx 

func (d *Snode) StringEx() string

func (*Snode) Type 

func (d *Snode) Type() string

func (*Snode) URL 

func (d *Snode) URL(network string) string

func (*Snode) Validate 

func (d *Snode) Validate() error

type Sowner 

type Sowner interface {
	Get() (smap *Smap)
	Listeners() SmapListeners
}

interface to Get current cluster-map instance

type Target 

type Target interface {
	Node
	SID() string
	String() string

	// Memory allocators.
	PageMM() *memsys.MMSA
	ByteMM() *memsys.MMSA

	// Backend provider(s) related functions.
	Backend(*Bck) BackendProvider
	CompareObjects(ctx context.Context, lom *LOM) (equal bool, errCode int, err error)

	// Object related functions.
	PutObject(lom *LOM, params *PutObjectParams) (err error)
	FinalizeObj(lom *LOM, workFQN string, xctn Xact) (errCode int, err error)
	EvictObject(lom *LOM) (errCode int, err error)
	DeleteObject(lom *LOM, evict bool) (errCode int, err error)
	CopyObject(lom *LOM, params *CopyObjectParams, dryRun bool) (int64, error)
	GetCold(ctx context.Context, lom *LOM, owt cmn.OWT) (errCode int, err error)
	Promote(params PromoteParams) (errCode int, err error)
	HeadObjT2T(lom *LOM, si *Snode) bool

	// File-system related functions.
	FSHC(err error, path string)
	OOS(*fs.CapStatus) fs.CapStatus

	// Other.
	BMDVersionFixup(r *http.Request, bck ...cmn.Bck)
	RebalanceNamespace(si *Snode) (body []byte, errCode int, err error)
	Health(si *Snode, timeout time.Duration, query url.Values) (body []byte, errCode int, err error)
}

For implementations, see `ais/tgtimpl.go` and `ais/htrun.go`. 

var (
	T Target
)

type Upon 

type Upon int

type Xact 

type Xact interface {
	Run(*sync.WaitGroup)
	ID() string
	Kind() string
	Bck() *Bck
	FromTo() (*Bck, *Bck)
	StartTime() time.Time
	EndTime() time.Time
	Finished() bool
	Running() bool
	IsAborted() bool
	AbortErr() error
	AbortedAfter(time.Duration) error
	ChanAbort() <-chan error
	Quiesce(time.Duration, QuiCB) QuiRes
	Result() (any, error)
	Snap() XactSnap

	// reporting: log, err
	String() string
	Name() string

	// modifiers
	Finish(error)
	Abort(error) bool
	AddNotif(n Notif)

	// common stats
	Objs() int64
	ObjsAdd(int, int64)    // locally processed
	OutObjsAdd(int, int64) // transmit
	InObjsAdd(int, int64)  // receive
	InBytes() int64
	OutBytes() int64
}

type XactSnap 

type XactSnap interface {
	IsAborted() bool
	Running() bool
	Finished() bool
}

Source Files

View all Source files

Directories

Path Synopsis
Package mock provides a variety of mock implementations used for testing.
 Package mock provides a variety of mock implementations used for testing.

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