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rename WAL#Flush to WAL#FlushAndSync (#3345)

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* rename WAL#Flush to WAL#FlushAndSync

- rename auto#Flush to auto#FlushAndSync
- cleanup WAL interface to not leak implementation details!
  * remove Group()
  * add WALReader interface and return it in SearchForEndHeight()
- add interface assertions

Refs #3337

* replace WALReader with io.ReadCloser
This commit is contained in:
Anton Kaliaev
2019-02-25 09:11:07 +04:00
committed by GitHub
parent 6797d85851
commit ec9bff5234
8 changed files with 76 additions and 62 deletions
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13
consensus/wal_test.go
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@ -32,8 +32,10 @@ func TestWALTruncate(t *testing.T) {
walFile := filepath.Join(walDir, "wal")
//this magic number 4K can truncate the content when RotateFile. defaultHeadSizeLimit(10M) is hard to simulate.
//this magic number 1 * time.Millisecond make RotateFile check frequently. defaultGroupCheckDuration(5s) is hard to simulate.
// this magic number 4K can truncate the content when RotateFile.
// defaultHeadSizeLimit(10M) is hard to simulate.
// this magic number 1 * time.Millisecond make RotateFile check frequently.
// defaultGroupCheckDuration(5s) is hard to simulate.
wal, err := NewWAL(walFile,
autofile.GroupHeadSizeLimit(4096),
autofile.GroupCheckDuration(1*time.Millisecond),
@ -49,14 +51,15 @@ func TestWALTruncate(t *testing.T) {
wal.Wait()
}()
//60 block's size nearly 70K, greater than group's headBuf size(4096 * 10), when headBuf is full, truncate content will Flush to the file.
//at this time, RotateFile is called, truncate content exist in each file.
// 60 block's size nearly 70K, greater than group's headBuf size(4096 * 10),
// when headBuf is full, truncate content will Flush to the file. at this
// time, RotateFile is called, truncate content exist in each file.
err = WALGenerateNBlocks(t, wal.Group(), 60)
require.NoError(t, err)
time.Sleep(1 * time.Millisecond) //wait groupCheckDuration, make sure RotateFile run
wal.Group().Flush()
wal.FlushAndSync()
h := int64(50)
gr, found, err := wal.SearchForEndHeight(h, &WALSearchOptions{})