b517c791e9
Instead of using O_SYNC, we are better off using O_DSYNC instead since we are only ever interested in data to be persisted to disk not the associated filesystem metadata. For reads we ask customers to turn off noatime, but instead we can proactively use O_NOATIME flag to avoid atime updates upon reads.
85 lines
1.9 KiB
Go
85 lines
1.9 KiB
Go
/*
|
|
* MinIO Cloud Storage, (C) 2018 MinIO, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package cmd
|
|
|
|
import (
|
|
"context"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"testing"
|
|
)
|
|
|
|
func testBitrotReaderWriterAlgo(t *testing.T, bitrotAlgo BitrotAlgorithm) {
|
|
tmpDir, err := ioutil.TempDir("", "")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer os.RemoveAll(tmpDir)
|
|
|
|
volume := "testvol"
|
|
filePath := "testfile"
|
|
|
|
disk, err := newLocalXLStorage(tmpDir)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
disk.MakeVol(context.Background(), volume)
|
|
|
|
writer := newBitrotWriter(disk, volume, filePath, 35, bitrotAlgo, 10)
|
|
|
|
_, err = writer.Write([]byte("aaaaaaaaaa"))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
_, err = writer.Write([]byte("aaaaaaaaaa"))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
_, err = writer.Write([]byte("aaaaaaaaaa"))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
_, err = writer.Write([]byte("aaaaa"))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
writer.(io.Closer).Close()
|
|
|
|
reader := newBitrotReader(disk, nil, volume, filePath, 35, bitrotAlgo, bitrotWriterSum(writer), 10)
|
|
b := make([]byte, 10)
|
|
if _, err = reader.ReadAt(b, 0); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err = reader.ReadAt(b, 10); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err = reader.ReadAt(b, 20); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err = reader.ReadAt(b[:5], 30); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func TestAllBitrotAlgorithms(t *testing.T) {
|
|
for bitrotAlgo := range bitrotAlgorithms {
|
|
testBitrotReaderWriterAlgo(t, bitrotAlgo)
|
|
}
|
|
}
|