// Run executes the command.
func (cmd *InfoCommand) Run(args ...string) error {
// Parse flags.
fs := flag.NewFlagSet("", flag.ContinueOnError)
help := fs.Bool("h", false, "")
if err := fs.Parse(args); err != nil {
return err
} else if *help {
fmt.Fprintln(cmd.Stderr, cmd.Usage())
return ErrUsage
}
// Require database path.
path := fs.Arg(0)
if path == "" {
return ErrPathRequired
} else if _, err := os.Stat(path); os.IsNotExist(err) {
return ErrFileNotFound
}
// Open the database.
db, err := bolt.Open(path, 0666, nil)
if err != nil {
return err
}
defer db.Close()
// Print basic database info.
info := db.Info()
fmt.Fprintf(cmd.Stdout, "Page Size: %d\n", info.PageSize)
return nil
}
func StoreInit(path string) error {
// open the BoltDB and return error if this did not work
// (beware that the same DB can only be opened by one
// process)
handle, err := bolt.Open(path, fileMode, nil)
if err != nil {
return err
}
// create the store
store := &Store{
db: handle,
path: path,
}
// initialize the database with needed buckets
err = store.db.Update(func(tx *bolt.Tx) error {
_, err := tx.CreateBucketIfNotExists(_BUCKET)
if err != nil {
return err
}
return nil
})
if err != nil {
store.Close()
return err
}
_store = store
return nil
}
// Run executes the command.
func (cmd *CheckCommand) Run(args ...string) error {
// Parse flags.
fs := flag.NewFlagSet("", flag.ContinueOnError)
help := fs.Bool("h", false, "")
if err := fs.Parse(args); err != nil {
return err
} else if *help {
fmt.Fprintln(cmd.Stderr, cmd.Usage())
return ErrUsage
}
// Require database path.
path := fs.Arg(0)
if path == "" {
return ErrPathRequired
} else if _, err := os.Stat(path); os.IsNotExist(err) {
return ErrFileNotFound
}
// Open database.
db, err := bolt.Open(path, 0666, nil)
if err != nil {
return err
}
defer db.Close()
// Perform consistency check.
return db.View(func(tx *bolt.Tx) error {
var count int
ch := tx.Check()
loop:
for {
select {
case err, ok := <-ch:
if !ok {
break loop
}
fmt.Fprintln(cmd.Stdout, err)
count++
}
}
// Print summary of errors.
if count > 0 {
fmt.Fprintf(cmd.Stdout, "%d errors found\n", count)
return ErrCorrupt
}
// Notify user that database is valid.
fmt.Fprintln(cmd.Stdout, "OK")
return nil
})
}
// Run executes the "bench" command.
func (cmd *BenchCommand) Run(args ...string) error {
// Parse CLI arguments.
options, err := cmd.ParseFlags(args)
if err != nil {
return err
}
// Remove path if "-work" is not set. Otherwise keep path.
if options.Work {
fmt.Fprintf(cmd.Stdout, "work: %s\n", options.Path)
} else {
defer os.Remove(options.Path)
}
// Create database.
db, err := bolt.Open(options.Path, 0666, nil)
if err != nil {
return err
}
db.NoSync = options.NoSync
defer db.Close()
// Write to the database.
var results BenchResults
if err := cmd.runWrites(db, options, &results); err != nil {
return fmt.Errorf("write: %v", err)
}
// Read from the database.
if err := cmd.runReads(db, options, &results); err != nil {
return fmt.Errorf("bench: read: %s", err)
}
// Print results.
fmt.Fprintf(os.Stderr, "# Write\t%v\t(%v/op)\t(%v op/sec)\n", results.WriteDuration, results.WriteOpDuration(), results.WriteOpsPerSecond())
fmt.Fprintf(os.Stderr, "# Read\t%v\t(%v/op)\t(%v op/sec)\n", results.ReadDuration, results.ReadOpDuration(), results.ReadOpsPerSecond())
fmt.Fprintln(os.Stderr, "")
return nil
}
// Run executes the command.
func (cmd *StatsCommand) Run(args ...string) error {
// Parse flags.
fs := flag.NewFlagSet("", flag.ContinueOnError)
help := fs.Bool("h", false, "")
if err := fs.Parse(args); err != nil {
return err
} else if *help {
fmt.Fprintln(cmd.Stderr, cmd.Usage())
return ErrUsage
}
// Require database path.
path, prefix := fs.Arg(0), fs.Arg(1)
if path == "" {
return ErrPathRequired
} else if _, err := os.Stat(path); os.IsNotExist(err) {
return ErrFileNotFound
}
// Open database.
db, err := bolt.Open(path, 0666, nil)
if err != nil {
return err
}
defer db.Close()
return db.View(func(tx *bolt.Tx) error {
var s bolt.BucketStats
var count int
if err := tx.ForEach(func(name []byte, b *bolt.Bucket) error {
if bytes.HasPrefix(name, []byte(prefix)) {
s.Add(b.Stats())
count += 1
}
return nil
}); err != nil {
return err
}
fmt.Fprintf(cmd.Stdout, "Aggregate statistics for %d buckets\n\n", count)
fmt.Fprintln(cmd.Stdout, "Page count statistics")
fmt.Fprintf(cmd.Stdout, "\tNumber of logical branch pages: %d\n", s.BranchPageN)
fmt.Fprintf(cmd.Stdout, "\tNumber of physical branch overflow pages: %d\n", s.BranchOverflowN)
fmt.Fprintf(cmd.Stdout, "\tNumber of logical leaf pages: %d\n", s.LeafPageN)
fmt.Fprintf(cmd.Stdout, "\tNumber of physical leaf overflow pages: %d\n", s.LeafOverflowN)
fmt.Fprintln(cmd.Stdout, "Tree statistics")
fmt.Fprintf(cmd.Stdout, "\tNumber of keys/value pairs: %d\n", s.KeyN)
fmt.Fprintf(cmd.Stdout, "\tNumber of levels in B+tree: %d\n", s.Depth)
fmt.Fprintln(cmd.Stdout, "Page size utilization")
fmt.Fprintf(cmd.Stdout, "\tBytes allocated for physical branch pages: %d\n", s.BranchAlloc)
var percentage int
if s.BranchAlloc != 0 {
percentage = int(float32(s.BranchInuse) * 100.0 / float32(s.BranchAlloc))
}
fmt.Fprintf(cmd.Stdout, "\tBytes actually used for branch data: %d (%d%%)\n", s.BranchInuse, percentage)
fmt.Fprintf(cmd.Stdout, "\tBytes allocated for physical leaf pages: %d\n", s.LeafAlloc)
percentage = 0
if s.LeafAlloc != 0 {
percentage = int(float32(s.LeafInuse) * 100.0 / float32(s.LeafAlloc))
}
fmt.Fprintf(cmd.Stdout, "\tBytes actually used for leaf data: %d (%d%%)\n", s.LeafInuse, percentage)
fmt.Fprintln(cmd.Stdout, "Bucket statistics")
fmt.Fprintf(cmd.Stdout, "\tTotal number of buckets: %d\n", s.BucketN)
percentage = 0
if s.BucketN != 0 {
percentage = int(float32(s.InlineBucketN) * 100.0 / float32(s.BucketN))
}
fmt.Fprintf(cmd.Stdout, "\tTotal number on inlined buckets: %d (%d%%)\n", s.InlineBucketN, percentage)
percentage = 0
if s.LeafInuse != 0 {
percentage = int(float32(s.InlineBucketInuse) * 100.0 / float32(s.LeafInuse))
}
fmt.Fprintf(cmd.Stdout, "\tBytes used for inlined buckets: %d (%d%%)\n", s.InlineBucketInuse, percentage)
return nil
})
}
// Run executes the command.
func (cmd *PagesCommand) Run(args ...string) error {
// Parse flags.
fs := flag.NewFlagSet("", flag.ContinueOnError)
help := fs.Bool("h", false, "")
if err := fs.Parse(args); err != nil {
return err
} else if *help {
fmt.Fprintln(cmd.Stderr, cmd.Usage())
return ErrUsage
}
// Require database path.
path := fs.Arg(0)
if path == "" {
return ErrPathRequired
} else if _, err := os.Stat(path); os.IsNotExist(err) {
return ErrFileNotFound
}
// Open database.
db, err := bolt.Open(path, 0666, nil)
if err != nil {
return err
}
defer func() { _ = db.Close() }()
// Write header.
fmt.Fprintln(cmd.Stdout, "ID TYPE ITEMS OVRFLW")
fmt.Fprintln(cmd.Stdout, "======== ========== ====== ======")
return db.Update(func(tx *bolt.Tx) error {
var id int
for {
p, err := tx.Page(id)
if err != nil {
return &PageError{ID: id, Err: err}
} else if p == nil {
break
}
// Only display count and overflow if this is a non-free page.
var count, overflow string
if p.Type != "free" {
count = strconv.Itoa(p.Count)
if p.OverflowCount > 0 {
overflow = strconv.Itoa(p.OverflowCount)
}
}
// Print table row.
fmt.Fprintf(cmd.Stdout, "%-8d %-10s %-6s %-6s\n", p.ID, p.Type, count, overflow)
// Move to the next non-overflow page.
id += 1
if p.Type != "free" {
id += p.OverflowCount
}
}
return nil
})
}