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Move to Set() not Append() due to large memory reference copy

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This commit is contained in:
Harshavardhana 2015-06-28 10:09:22 -07:00
parent 22abe1b397
commit 91e5f648cb
1 changed files with 11 additions and 14 deletions
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23
pkg/storage/drivers/donut/donut.go
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@ -501,8 +501,7 @@ func (d donutDriver) ListObjects(bucketName string, resources drivers.BucketReso
type proxyReader struct {
reader io.Reader
driver donutDriver
object string
readBytes []byte
}
func (r *proxyReader) free(p []byte) {
@ -513,24 +512,18 @@ func (r *proxyReader) Read(p []byte) (n int, err error) {
defer r.free(p)
n, err = r.reader.Read(p)
if err == io.EOF || err == io.ErrUnexpectedEOF {
ok := r.driver.objects.Append(r.object, p[0:n])
if !ok {
return n, io.ErrShortBuffer
}
r.readBytes = append(r.readBytes, p[0:n]...)
return
}
if err != nil {
return
}
ok := r.driver.objects.Append(r.object, p[0:n])
if !ok {
return n, io.ErrShortBuffer
}
r.readBytes = append(r.readBytes, p[0:n]...)
return
}
func newProxyReader(r io.Reader, d donutDriver, k string) *proxyReader {
return &proxyReader{reader: r, driver: d, object: k}
func newProxyReader(r io.Reader) *proxyReader {
return &proxyReader{reader: r, readBytes: nil}
}
// CreateObject creates a new object
@ -578,7 +571,7 @@ func (d donutDriver) CreateObject(bucketName, objectName, contentType, expectedM
}
expectedMD5Sum = hex.EncodeToString(expectedMD5SumBytes)
}
newReader := newProxyReader(reader, d, objectKey)
newReader := newProxyReader(reader)
calculatedMD5Sum, err := d.donut.PutObject(bucketName, objectName, expectedMD5Sum, newReader, metadata)
if err != nil {
switch iodine.ToError(err).(type) {
@ -587,6 +580,10 @@ func (d donutDriver) CreateObject(bucketName, objectName, contentType, expectedM
}
return "", iodine.New(err, errParams)
}
d.objects.Set(objectKey, newReader.readBytes)
// free up
newReader.readBytes = nil
go debug.FreeOSMemory()
objectMetadata, err := d.donut.GetObjectMetadata(bucketName, objectName)
if err != nil {
return "", iodine.New(err, nil)