// init recovery super block from index or super block.
func (v *Volume) init() (err error) {
var (
size int64
offset uint32
lastOffset uint32
)
// recovery from index
if err = v.Indexer.Recovery(func(ix *index.Index) error {
// must no less than last offset
if ix.Offset < lastOffset {
log.Error("recovery index: %s lastoffset: %d error(%v)", ix, lastOffset, errors.ErrIndexOffset)
return errors.ErrIndexOffset
}
// WARN if index's offset more than the block, discard it.
if size = int64(ix.Size) + needle.BlockOffset(ix.Offset); size > v.Block.Size {
log.Error("recovery index: %s EOF", ix)
return errors.ErrIndexEOF
}
v.needles[ix.Key] = needle.NewCache(ix.Offset, ix.Size)
offset = ix.Offset + needle.NeedleOffset(int64(ix.Size))
lastOffset = ix.Offset
return nil
}); err != nil && err != errors.ErrIndexEOF {
return
}
// recovery from super block
if err = v.Block.Recovery(offset, func(n *needle.Needle, so, eo uint32) (err1 error) {
if n.Flag == needle.FlagOK {
if err1 = v.Indexer.Write(n.Key, so, n.TotalSize); err1 != nil {
return
}
} else {
so = needle.CacheDelOffset
}
v.needles[n.Key] = needle.NewCache(so, n.TotalSize)
return
}); err != nil {
return
}
// recheck offset, keep size and offset consistency
if v.Block.Size != needle.BlockOffset(v.Block.Offset) {
log.Error("block: %s size: %d, offset: %d (%d size) not consistency", v.Block.File, v.Block.Size, v.Block.Offset, needle.BlockOffset(v.Block.Offset))
return errors.ErrSuperBlockOffset
}
// flush index
err = v.Indexer.Flush()
return
}
// Delete logical delete a needle, update disk needle flag and memory needle
// cache offset to zero.
func (v *Volume) Delete(key int64) (err error) {
var (
ok bool
nc int64
size int32
offset uint32
)
v.lock.Lock()
if nc, ok = v.needles[key]; ok {
if offset, size = needle.Cache(nc); offset != needle.CacheDelOffset {
v.needles[key] = needle.NewCache(needle.CacheDelOffset, size)
// when in compact, must save all del operations.
if v.Compact {
v.compactKeys = append(v.compactKeys, key)
}
} else {
err = errors.ErrNeedleDeleted
}
} else {
err = errors.ErrNeedleNotExist
}
v.lock.Unlock()
if err == nil {
err = v.del(offset)
}
return
}
// Write add a needles, if key exists append to super block, then update
// needle cache offset to new offset.
func (v *Volume) Write(n *needle.Needle) (err error) {
var (
ok bool
nc int64
offset uint32
ooffset uint32
now = time.Now().UnixNano()
)
v.lock.Lock()
offset = v.Block.Offset
if err = v.Block.Write(n); err == nil {
if err = v.Indexer.Add(n.Key, offset, n.TotalSize); err == nil {
nc, ok = v.needles[n.Key]
v.needles[n.Key] = needle.NewCache(offset, n.TotalSize)
}
}
v.lock.Unlock()
if err != nil {
return
}
if log.V(1) {
log.Infof("add needle, offset: %d, size: %d", offset, n.TotalSize)
log.Info(n)
}
if ok {
ooffset, _ = needle.Cache(nc)
err = v.del(ooffset)
log.Warningf("same key: %d, old offset: %d, new offset: %d", n.Key, ooffset, offset)
}
atomic.AddUint64(&v.Stats.TotalWriteProcessed, 1)
atomic.AddUint64(&v.Stats.TotalWriteBytes, uint64(n.TotalSize))
atomic.AddUint64(&v.Stats.TotalWriteDelay, uint64(time.Now().UnixNano()-now))
return
}
func (v *Volume) get(n *needle.Needle) (err error) {
var (
ok bool
nc int64
offset uint32
size int32
key = n.Key
now = time.Now().UnixNano()
)
// pread syscall is atomic, so use rlock
v.lock.RLock()
if nc, ok = v.needles[key]; ok {
if offset, size = needle.Cache(nc); offset != needle.CacheDelOffset {
n.TotalSize = size
err = v.Block.ReadAt(offset, n)
} else {
err = errors.ErrNeedleDeleted
}
} else {
err = errors.ErrNeedleNotExist
}
v.lock.RUnlock()
if err != nil {
return
}
if err = n.Parse(); err != nil {
return
}
if n.Key != key {
return errors.ErrNeedleKey
}
if n.TotalSize != size {
return errors.ErrNeedleSize
}
if log.V(1) {
log.Infof("get needle key: %d, cookie: %d, offset: %d, size: %d", n.Key, n.Cookie, offset, size)
log.Infof("%v\n", n)
}
// needles map may be out-dated, recheck
if n.Flag == needle.FlagDel {
v.lock.Lock()
v.needles[key] = needle.NewCache(needle.CacheDelOffset, size)
v.lock.Unlock()
err = errors.ErrNeedleDeleted
} else {
atomic.AddUint64(&v.Stats.TotalGetProcessed, 1)
atomic.AddUint64(&v.Stats.TotalReadBytes, uint64(size))
atomic.AddUint64(&v.Stats.TotalGetDelay, uint64(time.Now().UnixNano()-now))
}
return
}
// Writes write needles, if key exists append to super block, then update
// needle cache offset to new offset.
func (v *Volume) Writes(ns *needle.Needles) (err error) {
var (
i int
ok bool
nc int64
ncs []int64
offset uint32
ooffset uint32
n *needle.Needle
now = time.Now().UnixNano()
)
v.lock.Lock()
offset = v.Block.Offset
if err = v.Block.Writes(ns); err == nil {
for i = 0; i < ns.Num; i++ {
n = ns.Needle(i)
if err = v.Indexer.Add(n.Key, offset, n.TotalSize); err != nil {
break
}
if nc, ok = v.needles[n.Key]; ok {
ncs = append(ncs, nc)
}
v.needles[n.Key] = needle.NewCache(offset, n.TotalSize)
offset += n.IncrOffset
if log.V(1) {
log.Infof("add needle, offset: %d, size: %d", offset, n.TotalSize)
log.Info(n)
}
}
}
v.lock.Unlock()
if err != nil {
return
}
for _, nc = range ncs {
ooffset, _ = needle.Cache(nc)
err = v.del(ooffset)
log.Warningf("same key: %d, old offset: %d, new offset: %d", n.Key, ooffset, offset)
}
atomic.AddUint64(&v.Stats.TotalWriteProcessed, uint64(ns.Num))
atomic.AddUint64(&v.Stats.TotalWriteBytes, uint64(ns.TotalSize))
atomic.AddUint64(&v.Stats.TotalWriteDelay, uint64(time.Now().UnixNano()-now))
return
}
func TestIndex(t *testing.T) {
var (
i *Indexer
err error
noffset uint32
file = "../test/test.idx"
needles = make(map[int64]int64)
)
os.Remove(file)
defer os.Remove(file)
if i, err = NewIndexer(file, testConf); err != nil {
t.Errorf("NewIndexer() error(%v)", err)
t.FailNow()
}
i.Close()
// test closed
if err = i.Add(1, 1, 8); err != errors.ErrIndexClosed {
t.Errorf("Add() error(%v)", err)
t.FailNow()
}
// test open
if err = i.Open(); err != nil {
t.Errorf("Open() error(%v)", err)
t.FailNow()
}
defer i.Close()
// test add
if err = i.Add(1, 1, 8); err != nil {
t.Errorf("Add() error(%v)", err)
t.FailNow()
}
if err = i.Add(2, 2, 8); err != nil {
t.Errorf("Add() error(%v)", err)
t.FailNow()
}
if err = i.Add(5, 3, 8); err != nil {
t.Errorf("Add() error(%v)", err)
t.FailNow()
}
if err = i.Add(6, 4, 8); err != nil {
t.Errorf("Add() error(%v)", err)
t.FailNow()
}
i.Signal()
time.Sleep(1 * time.Second)
i.Flush()
// test recovery
if err = i.Recovery(func(ix *Index) error {
needles[ix.Key] = needle.NewCache(ix.Offset, ix.Size)
noffset = ix.Offset + needle.NeedleOffset(int64(ix.Size))
return nil
}); err != nil {
t.Errorf("Recovery() error(%v)", err)
t.FailNow()
}
// add 4 index, start with 5
if noffset != 5 {
t.Errorf("noffset: %d not match", noffset)
t.FailNow()
}
if o, s := needle.Cache(needles[1]); o != 1 && s != 8 {
t.Error("needle cache not match")
t.FailNow()
}
if o, s := needle.Cache(needles[2]); o != 2 && s != 8 {
t.Error("needle cache not match")
t.FailNow()
}
if o, s := needle.Cache(needles[5]); o != 3 && s != 8 {
t.Error("needle cache not match")
t.FailNow()
}
if o, s := needle.Cache(needles[6]); o != 4 && s != 8 {
t.Error("needle cache not match")
t.FailNow()
}
// test write
if err = i.Write(10, 5, 8); err != nil {
t.Error("Write() error(%v)", err)
t.FailNow()
}
if err = i.Flush(); err != nil {
t.Error("Flush() error(%v)", err)
t.FailNow()
}
// test recovery
noffset = 0
if err = i.Recovery(func(ix *Index) error {
needles[ix.Key] = needle.NewCache(ix.Offset, ix.Size)
noffset = ix.Offset + needle.NeedleOffset(int64(ix.Size))
return nil
}); err != nil {
t.Errorf("Recovery() error(%v)", err)
t.FailNow()
}
// add 5 index, start with 6
if noffset != 6 {
t.Errorf("noffset: %d not match", noffset)
t.FailNow()
}
if o, s := needle.Cache(needles[10]); o != 5 && s != 8 {
t.Error("needle.Value(1) not match")
t.FailNow()
}
}
func TestSuperBlock(t *testing.T) {
var (
b *SuperBlock
offset, v2, v3, v4 uint32
err error
buf = &bytes.Buffer{}
needles = make(map[int64]int64)
data = []byte("test")
n = needle.NewBufferNeedle(4)
file = "../test/test.block"
ifile = "../test/test.idx"
//indexer *Indexer
)
os.Remove(file)
os.Remove(ifile)
defer os.Remove(file)
defer os.Remove(ifile)
// test new block file
if b, err = NewSuperBlock(file, testConf); err != nil {
t.Errorf("NewSuperBlock(\"%s\") error(%v)", file, err)
t.FailNow()
}
b.Close()
// test parse block file
if b, err = NewSuperBlock(file, testConf); err != nil {
t.Errorf("NewSuperBlock(\"%s\") error(%v)", file, err)
t.FailNow()
}
b.Close()
// test open
if err = b.Open(); err != nil {
t.Errorf("Open() error(%v)", err)
t.FailNow()
}
defer b.Close()
// test write
if _, err = buf.Write(data); err != nil {
t.Errorf("buf.Write() error(%v)", err)
t.FailNow()
}
if err = n.WriteFrom(1, 1, 4, buf); err != nil {
t.Errorf("n.Write() error(%v)", err)
t.FailNow()
}
if err = b.Write(n); err != nil {
t.Errorf("b.Write() error(%v)", err)
t.FailNow()
}
if err = compareTestOffset(b, n, needle.NeedleOffset(int64(_headerSize))); err != nil {
t.Errorf("compareTestOffset() error(%v)", err)
t.FailNow()
}
offset = b.Offset
v2 = b.Offset
// test get
if err = b.ReadAt(1, n); err != nil {
t.Errorf("b.ReadAt() error(%v)", err)
t.FailNow()
}
if err = compareTestNeedle(t, 1, 1, needle.FlagOK, n, data); err != nil {
t.Errorf("compareTestNeedle() error(%v)", err)
t.FailNow()
}
// test write
if _, err = buf.Write(data); err != nil {
t.Errorf("buf.Write() error(%v)", err)
t.FailNow()
}
if err = n.WriteFrom(2, 2, 4, buf); err != nil {
t.Errorf("n.Write() error(%v)", err)
t.FailNow()
}
if err = b.Write(n); err != nil {
t.Errorf("b.Write() error(%v)", err)
t.FailNow()
}
if err = compareTestOffset(b, n, offset); err != nil {
t.Errorf("compareTestOffset() error(%v)", err)
t.FailNow()
}
offset = b.Offset
v3 = b.Offset
if err = b.ReadAt(6, n); err != nil {
t.Errorf("b.ReadAt() error(%v)", err)
t.FailNow()
}
if err = compareTestNeedle(t, 2, 2, needle.FlagOK, n, data); err != nil {
t.Error("compareTestNeedle(2)")
t.FailNow()
}
// test write
if _, err = buf.Write(data); err != nil {
t.Errorf("buf.Write() error(%v)", err)
t.FailNow()
}
if err = n.WriteFrom(3, 3, 4, buf); err != nil {
t.Errorf("n.Write() error(%v)", err)
t.FailNow()
}
if err = b.Write(n); err != nil {
t.Errorf("b.Write() error(%v)", err)
t.FailNow()
}
offset = b.Offset
v4 = b.Offset
// test write
if _, err = buf.Write(data); err != nil {
t.Errorf("buf.Write() error(%v)", err)
t.FailNow()
}
if err = n.WriteFrom(4, 4, 4, buf); err != nil {
t.Errorf("n.Write() error(%v)", err)
t.FailNow()
}
if err = b.Write(n); err != nil {
t.Errorf("b.Write() error(%v)", err)
t.FailNow()
}
if err = b.flush(true); err != nil {
t.Errorf("Flush() error(%v)", err)
t.FailNow()
}
if err = compareTestOffset(b, n, offset); err != nil {
t.Errorf("compareTestOffset() error(%v)", err)
t.FailNow()
}
if err = b.ReadAt(11, n); err != nil {
t.Errorf("Get() error(%v)", err)
t.FailNow()
}
if err = compareTestNeedle(t, 3, 3, needle.FlagOK, n, data); err != nil {
t.Error("compareTestNeedle(3)")
t.FailNow()
}
if err = b.ReadAt(16, n); err != nil {
t.Errorf("Get() error(%v)", err)
t.FailNow()
}
if err = compareTestNeedle(t, 4, 4, needle.FlagOK, n, data); err != nil {
t.Error("compareTestNeedle(r)")
t.FailNow()
}
// test del, del first needles
if err = b.Delete(1); err != nil {
t.Errorf("Del() error(%v)", err)
t.FailNow()
}
// test get
if err = b.ReadAt(1, n); err != nil {
t.Errorf("Get() error(%v)", err)
t.FailNow()
}
if err = compareTestNeedle(t, 1, 1, needle.FlagDel, n, data); err != nil {
t.FailNow()
}
if err = b.ReadAt(11, n); err != nil {
t.Errorf("Get() error(%v)", err)
t.FailNow()
}
if err = compareTestNeedle(t, 3, 3, needle.FlagOK, n, data); err != nil {
t.FailNow()
}
if err = b.ReadAt(16, n); err != nil {
t.Errorf("b.Get() error(%v)", err)
t.FailNow()
}
if err = compareTestNeedle(t, 4, 4, needle.FlagOK, n, data); err != nil {
t.FailNow()
}
// test recovery
offset = b.Offset
if err = b.Recovery(0, func(rn *needle.Needle, so, eo uint32) (err1 error) {
if rn.Flag != needle.FlagOK {
so = needle.CacheDelOffset
}
needles[rn.Key] = needle.NewCache(so, rn.TotalSize)
return
}); err != nil {
t.Errorf("Recovery() error(%v)", err)
t.FailNow()
}
if b.Offset != offset {
err = fmt.Errorf("b.Offset not match %d", b.Offset)
t.Error(err)
t.FailNow()
}
if o, s := needle.Cache(needles[1]); o != needle.CacheDelOffset && s != 40 {
t.Error("needle.Cache() not match")
t.FailNow()
}
if o, s := needle.Cache(needles[2]); o != v2 && s != 40 {
t.Error("needle.Cache() not match")
t.FailNow()
}
if o, s := needle.Cache(needles[3]); o != v3 && s != 40 {
t.Error("needle.Cache() not match")
t.FailNow()
}
if o, s := needle.Cache(needles[4]); o != v4 && s != 40 {
t.Error("needle.Cache() not match")
t.FailNow()
}
needles = make(map[int64]int64)
if err = b.Recovery(v2, func(rn *needle.Needle, so, eo uint32) (err1 error) {
if rn.Flag != needle.FlagOK {
so = needle.CacheDelOffset
}
needles[rn.Key] = needle.NewCache(so, rn.TotalSize)
return
}); err != nil {
t.Errorf("b.Recovery() error(%v)", err)
t.FailNow()
}
// skip first needle, so key:1 must not exist
if o, s := needle.Cache(needles[1]); o != 0 && s != 0 {
t.Error("needle.Value(1) not match")
t.FailNow()
}
if o, s := needle.Cache(needles[2]); o != v2 && s != 40 {
t.Error("needle.Value(2) not match")
t.FailNow()
}
if o, s := needle.Cache(needles[3]); o != v3 && s != 40 {
t.Error("needle.Value(3) not match")
t.FailNow()
}
if o, s := needle.Cache(needles[4]); o != v4 && s != 40 {
t.Error("needle.Value(4) not match")
t.FailNow()
}
// test repair
if _, err = buf.Write(data); err != nil {
t.Errorf("buf.Write() error(%v)", err)
t.FailNow()
}
if err = n.WriteFrom(3, 3, 4, buf); err != nil {
t.Errorf("n.Write() error(%v)", err)
t.FailNow()
}
if err = b.WriteAt(v3, n); err != nil {
t.Errorf("b.Repair(3) error(%v)", err)
t.FailNow()
}
if err = b.ReadAt(v3, n); err != nil {
t.Errorf("b.Get() error(%v)", err)
t.FailNow()
}
if err = compareTestNeedle(t, 3, 3, needle.FlagOK, n, data); err != nil {
t.Error("compareTestNeedle(3)")
t.FailNow()
}
// test compress
if err = b.Compact(0, func(rn *needle.Needle, so, eo uint32) (err1 error) {
if rn.Flag != needle.FlagOK {
return
}
needles[rn.Key] = needle.NewCache(so, rn.TotalSize)
return
}); err != nil {
t.Errorf("b.Compress() error(%v)", err)
t.FailNow()
}
// skip first needle, so key:1 must not exist
if o, s := needle.Cache(needles[1]); o != 0 && s != 0 {
t.Error("needle.Value(1) not match")
t.FailNow()
}
if o, s := needle.Cache(needles[2]); o != v2 && s != 40 {
t.Error("needle.Value(2) not match")
t.FailNow()
}
if o, s := needle.Cache(needles[3]); o != v3 && s != 40 {
t.Error("needle.Value(3) not match")
t.FailNow()
}
if o, s := needle.Cache(needles[4]); o != v4 && s != 40 {
t.Error("needle.Value(4) not match")
t.FailNow()
}
}