// CreateConfig creates a config file with a randomly selected polynomial and
// ID and saves the config in the repository.
func CreateConfig(r JSONUnpackedSaver) (Config, error) {
var (
err error
cfg Config
)
cfg.ChunkerPolynomial, err = chunker.RandomPolynomial()
if err != nil {
return Config{}, err
}
newID := make([]byte, repositoryIDSize)
_, err = io.ReadFull(rand.Reader, newID)
if err != nil {
return Config{}, err
}
cfg.ID = hex.EncodeToString(newID)
cfg.Version = RepoVersion
debug.Log("Repo.CreateConfig", "New config: %#v", cfg)
_, err = r.SaveJSONUnpacked(backend.Config, cfg)
return cfg, err
}
func BenchmarkNewChunker(b *testing.B) {
p, err := chunker.RandomPolynomial()
OK(b, err)
b.ResetTimer()
for i := 0; i < b.N; i++ {
chunker.New(bytes.NewBuffer(nil), p, nil)
}
}
// CreateConfig creates a config file with a randomly selected polynomial and
// ID.
func CreateConfig() (Config, error) {
var (
err error
cfg Config
)
cfg.ChunkerPolynomial, err = chunker.RandomPolynomial()
if err != nil {
return Config{}, errors.Wrap(err, "chunker.RandomPolynomial")
}
cfg.ID = NewRandomID().String()
cfg.Version = RepoVersion
debug.Log("New config: %#v", cfg)
return cfg, nil
}
func TestChunkerWithRandomPolynomial(t *testing.T) {
// setup data source
buf := getRandom(23, 32*1024*1024)
// generate a new random polynomial
start := time.Now()
p, err := chunker.RandomPolynomial()
OK(t, err)
t.Logf("generating random polynomial took %v", time.Since(start))
start = time.Now()
ch := chunker.New(bytes.NewReader(buf), p, sha256.New())
t.Logf("creating chunker took %v", time.Since(start))
// make sure that first chunk is different
c, err := ch.Next()
Assert(t, c.Cut != chunks1[0].CutFP,
"Cut point is the same")
Assert(t, c.Length != chunks1[0].Length,
"Length is the same")
Assert(t, !bytes.Equal(c.Digest, chunks1[0].Digest),
"Digest is the same")
}
func BenchmarkRandomPolynomial(t *testing.B) {
for i := 0; i < t.N; i++ {
_, err := chunker.RandomPolynomial()
OK(t, err)
}
}
func TestRandomPolynomial(t *testing.T) {
_, err := chunker.RandomPolynomial()
OK(t, err)
}