func (t *tOps) lookup(f *tFile) (c cache.Object, err error) {
num := f.file.Num()
c, ok := t.cacheNS.Get(num, func() (ok bool, value interface{}, charge int, fin cache.SetFin) {
var r storage.Reader
r, err = f.file.Open()
if err != nil {
return
}
o := t.s.o
var cacheNS cache.Namespace
if bc := o.GetBlockCache(); bc != nil {
cacheNS = bc.GetNamespace(num)
}
ok = true
value = table.NewReader(r, int64(f.size), cacheNS, o)
charge = 1
fin = func() {
r.Close()
}
return
})
if !ok && err == nil {
err = ErrClosed
}
return
}
// Opens table. It returns a cache handle, which should
// be released after use.
func (t *tOps) open(f *tFile) (ch *cache.Handle, err error) {
ch = t.cache.Get(0, uint64(f.fd.Num), func() (size int, value cache.Value) {
var r storage.Reader
r, err = t.s.stor.Open(f.fd)
if err != nil {
return 0, nil
}
var bcache *cache.NamespaceGetter
if t.bcache != nil {
bcache = &cache.NamespaceGetter{Cache: t.bcache, NS: uint64(f.fd.Num)}
}
var tr *table.Reader
tr, err = table.NewReader(r, f.size, f.fd, bcache, t.bpool, t.s.o.Options)
if err != nil {
r.Close()
return 0, nil
}
return 1, tr
})
if ch == nil && err == nil {
err = ErrClosed
}
return
}
// Opens table. It returns a cache handle, which should
// be released after use.
func (t *tOps) open(f *tFile) (ch *cache.Handle, err error) {
num := f.file.Num()
ch = t.cache.Get(0, num, func() (size int, value cache.Value) {
var r storage.Reader
r, err = f.file.Open()
if err != nil {
return 0, nil
}
var bcache *cache.CacheGetter
if t.bcache != nil {
bcache = &cache.CacheGetter{Cache: t.bcache, NS: num}
}
var tr *table.Reader
tr, err = table.NewReader(r, int64(f.size), storage.NewFileInfo(f.file), bcache, t.bpool, t.s.o.Options)
if err != nil {
r.Close()
return 0, nil
}
return 1, tr
})
if ch == nil && err == nil {
err = ErrClosed
}
return
}
// Opens table. It returns a cache handle, which should
// be released after use.
func (t *tOps) open(f *tFile) (ch cache.Handle, err error) {
t.mu.Lock()
defer t.mu.Unlock()
num := f.file.Num()
ch = t.cacheNS.Get(num, func() (charge int, value interface{}) {
var r storage.Reader
r, err = f.file.Open()
if err != nil {
return 0, nil
}
var bcacheNS cache.Namespace
if bc := t.s.o.GetBlockCache(); bc != nil {
bcacheNS = bc.GetNamespace(num)
}
return 1, &trWrapper{table.NewReader(r, int64(f.size), bcacheNS, t.bpool, t.s.o), t, 0}
})
if ch == nil && err == nil {
err = ErrClosed
}
ch.Value().(*trWrapper).ref++
ch = &trCacheHandleWrapper{ch, t, false}
return
}
// Opens table. It returns a cache handle, which should
// be released after use.
func (t *tOps) open(f *tFile) (ch cache.Handle, err error) {
num := f.file.Num()
ch = t.cacheNS.Get(num, func() (charge int, value interface{}) {
var r storage.Reader
r, err = f.file.Open()
if err != nil {
return 0, nil
}
var bcacheNS cache.Namespace
if bc := t.s.o.GetBlockCache(); bc != nil {
bcacheNS = bc.GetNamespace(num)
}
var tr *table.Reader
tr, err = table.NewReader(r, int64(f.size), storage.NewFileInfo(f.file), bcacheNS, t.bpool, t.s.o.Options)
if err != nil {
r.Close()
return 0, nil
}
return 1, tr
})
if ch == nil && err == nil {
err = ErrClosed
}
return
}
func (tc *stConstructor_Table) finish() (size int, err error) {
err = tc.writer.Close()
if err != nil {
return
}
tc.t.Logf("table: contains %d entries and %d blocks", tc.writer.EntriesLen(), tc.writer.BlocksLen())
size = tc.buf.Len()
if csize := int(tc.writer.BytesLen()); csize != size {
tc.t.Errorf("table: invalid calculated size, calculated=%d actual=%d", csize, size)
}
tc.reader = table.NewReader(bytes.NewReader(tc.buf.Bytes()), int64(size), nil, tc.o)
return
}
func (p *stConstructor_Table) finish() (size int, err error) {
p.t.Logf("table: contains %d entries and %d blocks", p.tw.Len(), p.tw.CountBlock())
err = p.tw.Finish()
if err != nil {
return
}
p.w.Close()
tsize := uint64(p.tw.Size())
fsize, _ := p.file.Size()
if fsize != tsize {
p.t.Errorf("table: calculated size doesn't equal with actual size, calculated=%d actual=%d", tsize, fsize)
}
p.r, _ = p.file.Open()
o := &opt.Options{
BlockRestartInterval: 3,
Filter: filter.NewBloomFilter(10),
}
p.tr, err = table.NewReader(p.r, fsize, o, nil)
return int(fsize), nil
}
func (t *tOps) lookup(f *tFile) (c cache.Object, err error) {
num := f.file.Num()
c, _ = t.cachens.Get(num, func() (ok bool, value interface{}, charge int, fin func()) {
var r storage.Reader
r, err = f.file.Open()
if err != nil {
return
}
o := t.s.o
var ns cache.Namespace
bc := o.GetBlockCache()
if bc != nil {
ns = bc.GetNamespace(num)
}
var p *table.Reader
p, err = table.NewReader(r, f.size, t.s.o, ns)
if err != nil {
return
}
ok = true
value = p
charge = 1
fin = func() {
r.Close()
}
return
})
return
}
func recoverTable(s *session, o *opt.Options) error {
// Get all tables and sort it by file number.
tableFiles_, err := s.getFiles(storage.TypeTable)
if err != nil {
return err
}
tableFiles := files(tableFiles_)
tableFiles.sort()
var mSeq uint64
var good, corrupted int
rec := new(sessionRecord)
bpool := util.NewBufferPool(o.GetBlockSize() + 5)
buildTable := func(iter iterator.Iterator) (tmp storage.File, size int64, err error) {
tmp = s.newTemp()
writer, err := tmp.Create()
if err != nil {
return
}
defer func() {
writer.Close()
if err != nil {
tmp.Remove()
tmp = nil
}
}()
// Copy entries.
tw := table.NewWriter(writer, o)
for iter.Next() {
key := iter.Key()
if validIkey(key) {
err = tw.Append(key, iter.Value())
if err != nil {
return
}
}
}
err = iter.Error()
if err != nil {
return
}
err = tw.Close()
if err != nil {
return
}
err = writer.Sync()
if err != nil {
return
}
size = int64(tw.BytesLen())
return
}
recoverTable := func(file storage.File) error {
s.logf("table@recovery recovering @%d", file.Num())
reader, err := file.Open()
if err != nil {
return err
}
defer reader.Close()
// Get file size.
size, err := reader.Seek(0, 2)
if err != nil {
return err
}
var tSeq uint64
var tgood, tcorrupted, blockerr int
var imin, imax []byte
tr := table.NewReader(reader, size, nil, bpool, o)
iter := tr.NewIterator(nil, nil)
iter.(iterator.ErrorCallbackSetter).SetErrorCallback(func(err error) {
s.logf("table@recovery found error @%d %q", file.Num(), err)
blockerr++
})
// Scan the table.
for iter.Next() {
key := iter.Key()
_, seq, _, ok := parseIkey(key)
if !ok {
tcorrupted++
continue
}
tgood++
if seq > tSeq {
tSeq = seq
}
if imin == nil {
imin = append([]byte{}, key...)
}
imax = append(imax[:0], key...)
}
if err := iter.Error(); err != nil {
iter.Release()
return err
}
iter.Release()
if tgood > 0 {
if tcorrupted > 0 || blockerr > 0 {
// Rebuild the table.
s.logf("table@recovery rebuilding @%d", file.Num())
iter := tr.NewIterator(nil, nil)
tmp, newSize, err := buildTable(iter)
iter.Release()
if err != nil {
return err
}
reader.Close()
if err := file.Replace(tmp); err != nil {
return err
}
size = newSize
}
if tSeq > mSeq {
mSeq = tSeq
}
// Add table to level 0.
rec.addTable(0, file.Num(), uint64(size), imin, imax)
s.logf("table@recovery recovered @%d N·%d C·%d B·%d S·%d Q·%d", file.Num(), tgood, tcorrupted, blockerr, size, tSeq)
} else {
s.logf("table@recovery unrecoverable @%d C·%d B·%d S·%d", file.Num(), tcorrupted, blockerr, size)
}
good += tgood
corrupted += tcorrupted
return nil
}
// Recover all tables.
if len(tableFiles) > 0 {
s.logf("table@recovery F·%d", len(tableFiles))
// Mark file number as used.
s.markFileNum(tableFiles[len(tableFiles)-1].Num())
for _, file := range tableFiles {
if err := recoverTable(file); err != nil {
return err
}
}
s.logf("table@recovery recovered F·%d N·%d C·%d Q·%d", len(tableFiles), good, corrupted, mSeq)
}
// Set sequence number.
rec.setSeq(mSeq + 1)
// Create new manifest.
if err := s.create(); err != nil {
return err
}
// Commit.
return s.commit(rec)
}
func (ts *testingStorage) scanTable(fd storage.FileDesc, checksum bool) (corrupted bool) {
r, err := ts.Open(fd)
if err != nil {
log.Fatal(err)
}
defer r.Close()
size, err := r.Seek(0, os.SEEK_END)
if err != nil {
log.Fatal(err)
}
o := &opt.Options{
DisableLargeBatchTransaction: true,
Strict: opt.NoStrict,
}
if checksum {
o.Strict = opt.StrictBlockChecksum | opt.StrictReader
}
tr, err := table.NewReader(r, size, fd, nil, bpool, o)
if err != nil {
log.Fatal(err)
}
defer tr.Release()
checkData := func(i int, t string, data []byte) bool {
if len(data) == 0 {
panic(fmt.Sprintf("[%v] nil data: i=%d t=%s", fd, i, t))
}
checksum0, checksum1 := dataChecksum(data)
if checksum0 != checksum1 {
atomic.StoreUint32(&fail, 1)
atomic.StoreUint32(&done, 1)
corrupted = true
data0, data1 := dataSplit(data)
data0c0, data0c1 := dataChecksum(data0)
data1c0, data1c1 := dataChecksum(data1)
log.Printf("FATAL: [%v] Corrupted data i=%d t=%s (%#x != %#x): %x(%v) vs %x(%v)",
fd, i, t, checksum0, checksum1, data0, data0c0 == data0c1, data1, data1c0 == data1c1)
return true
}
return false
}
iter := tr.NewIterator(nil, nil)
defer iter.Release()
for i := 0; iter.Next(); i++ {
ukey, _, kt, kerr := parseIkey(iter.Key())
if kerr != nil {
atomic.StoreUint32(&fail, 1)
atomic.StoreUint32(&done, 1)
corrupted = true
log.Printf("FATAL: [%v] Corrupted ikey i=%d: %v", fd, i, kerr)
return
}
if checkData(i, "key", ukey) {
return
}
if kt == ktVal && checkData(i, "value", iter.Value()) {
return
}
}
if err := iter.Error(); err != nil {
if errors.IsCorrupted(err) {
atomic.StoreUint32(&fail, 1)
atomic.StoreUint32(&done, 1)
corrupted = true
log.Printf("FATAL: [%v] Corruption detected: %v", fd, err)
} else {
log.Fatal(err)
}
}
return
}
func recoverTable(s *session, o *opt.Options) error {
o = dupOptions(o)
// Mask StrictReader, lets StrictRecovery doing its job.
o.Strict &= ^opt.StrictReader
// Get all tables and sort it by file number.
tableFiles_, err := s.getFiles(storage.TypeTable)
if err != nil {
return err
}
tableFiles := files(tableFiles_)
tableFiles.sort()
var (
maxSeq uint64
recoveredKey, goodKey, corruptedKey, corruptedBlock, droppedTable int
// We will drop corrupted table.
strict = o.GetStrict(opt.StrictRecovery)
rec = &sessionRecord{numLevel: o.GetNumLevel()}
bpool = util.NewBufferPool(o.GetBlockSize() + 5)
)
buildTable := func(iter iterator.Iterator) (tmp storage.File, size int64, err error) {
tmp = s.newTemp()
writer, err := tmp.Create()
if err != nil {
return
}
defer func() {
writer.Close()
if err != nil {
tmp.Remove()
tmp = nil
}
}()
// Copy entries.
tw := table.NewWriter(writer, o)
for iter.Next() {
key := iter.Key()
if validIkey(key) {
err = tw.Append(key, iter.Value())
if err != nil {
return
}
}
}
err = iter.Error()
if err != nil {
return
}
err = tw.Close()
if err != nil {
return
}
err = writer.Sync()
if err != nil {
return
}
size = int64(tw.BytesLen())
return
}
recoverTable := func(file storage.File) error {
s.logf("table@recovery recovering @%d", file.Num())
reader, err := file.Open()
if err != nil {
return err
}
var closed bool
defer func() {
if !closed {
reader.Close()
}
}()
// Get file size.
size, err := reader.Seek(0, 2)
if err != nil {
return err
}
var (
tSeq uint64
tgoodKey, tcorruptedKey, tcorruptedBlock int
imin, imax []byte
)
tr, err := table.NewReader(reader, size, storage.NewFileInfo(file), nil, bpool, o)
if err != nil {
return err
}
iter := tr.NewIterator(nil, nil)
iter.(iterator.ErrorCallbackSetter).SetErrorCallback(func(err error) {
if errors.IsCorrupted(err) {
s.logf("table@recovery block corruption @%d %q", file.Num(), err)
tcorruptedBlock++
}
})
// Scan the table.
for iter.Next() {
key := iter.Key()
_, seq, _, kerr := parseIkey(key)
if kerr != nil {
tcorruptedKey++
continue
}
tgoodKey++
if seq > tSeq {
tSeq = seq
}
if imin == nil {
imin = append([]byte{}, key...)
}
imax = append(imax[:0], key...)
}
if err := iter.Error(); err != nil {
iter.Release()
return err
}
iter.Release()
goodKey += tgoodKey
corruptedKey += tcorruptedKey
corruptedBlock += tcorruptedBlock
if strict && (tcorruptedKey > 0 || tcorruptedBlock > 0) {
droppedTable++
s.logf("table@recovery dropped @%d Gk·%d Ck·%d Cb·%d S·%d Q·%d", file.Num(), tgoodKey, tcorruptedKey, tcorruptedBlock, size, tSeq)
return nil
}
if tgoodKey > 0 {
if tcorruptedKey > 0 || tcorruptedBlock > 0 {
// Rebuild the table.
s.logf("table@recovery rebuilding @%d", file.Num())
iter := tr.NewIterator(nil, nil)
tmp, newSize, err := buildTable(iter)
iter.Release()
if err != nil {
return err
}
closed = true
reader.Close()
if err := file.Replace(tmp); err != nil {
return err
}
size = newSize
}
if tSeq > maxSeq {
maxSeq = tSeq
}
recoveredKey += tgoodKey
// Add table to level 0.
rec.addTable(0, file.Num(), uint64(size), imin, imax)
s.logf("table@recovery recovered @%d Gk·%d Ck·%d Cb·%d S·%d Q·%d", file.Num(), tgoodKey, tcorruptedKey, tcorruptedBlock, size, tSeq)
} else {
droppedTable++
s.logf("table@recovery unrecoverable @%d Ck·%d Cb·%d S·%d", file.Num(), tcorruptedKey, tcorruptedBlock, size)
}
return nil
}
// Recover all tables.
if len(tableFiles) > 0 {
s.logf("table@recovery F·%d", len(tableFiles))
// Mark file number as used.
s.markFileNum(tableFiles[len(tableFiles)-1].Num())
for _, file := range tableFiles {
if err := recoverTable(file); err != nil {
return err
}
}
s.logf("table@recovery recovered F·%d N·%d Gk·%d Ck·%d Q·%d", len(tableFiles), recoveredKey, goodKey, corruptedKey, maxSeq)
}
// Set sequence number.
rec.setSeqNum(maxSeq)
// Create new manifest.
if err := s.create(); err != nil {
return err
}
// Commit.
return s.commit(rec)
}
