com.qcloud.cos.transfer.TransferManagerConfiguration Maven / Gradle / Ivy
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/*
* Copyright 2010-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.
* According to cos feature, we modify some class，comment, field name, etc.
*/
package com.qcloud.cos.transfer;
import static com.qcloud.cos.internal.Constants.GB;
import static com.qcloud.cos.internal.Constants.MB;
/**
* Configuration options for how {@link TransferManager} processes requests.
*
* The best configuration settings depend on network configuration, latency and bandwidth. The
* default configuration settings are suitable for most applications, but this class enables
* developers to experiment with different configurations and tune transfer manager performance.
*/
public class TransferManagerConfiguration {
/** Default minimum part size for upload parts. */
private static final int DEFAULT_MINIMUM_UPLOAD_PART_SIZE = 5 * MB;
/** Default size threshold for when to use multipart uploads. */
private static final long DEFAULT_MULTIPART_UPLOAD_THRESHOLD = 5 * MB;
/** Default size threshold for COS object after which multi-part copy is initiated. */
private static final long DEFAULT_MULTIPART_COPY_THRESHOLD = 5 * GB;
/** Default minimum size of each part for multi-part copy. */
private static final long DEFAULT_MINIMUM_COPY_PART_SIZE = 100 * MB;
/**
* The minimum part size for upload parts. Decreasing the minimum part size will cause multipart
* uploads to be split into a larger number of smaller parts. Setting this value too low can
* have a negative effect on transfer speeds since it will cause extra latency and network
* communication for each part.
*/
private long minimumUploadPartSize = DEFAULT_MINIMUM_UPLOAD_PART_SIZE;
/**
* The size threshold, in bytes, for when to use multipart uploads. Uploads over this size will
* automatically use a multipart upload strategy, while uploads smaller than this threshold will
* use a single connection to upload the whole object.
*
* Multipart uploads are easier to recover from and also potentially faster than single part
* uploads, especially when the upload parts can be uploaded in parallel as with files. Because
* there is additional network communication, small uploads are still recommended to use a
* single connection for the upload.
*/
private long multipartUploadThreshold = DEFAULT_MULTIPART_UPLOAD_THRESHOLD;
/**
* The size threshold, in bytes, for when to use multi-part copy. Copy requests for objects over
* this size will automatically use a multi-part copy strategy, while copy requests for objects
* smaller than this threshold will use a single connection to copy the whole object.
*/
private long multipartCopyThreshold = DEFAULT_MULTIPART_COPY_THRESHOLD;
/**
* The minimum size in bytes of each part when a multi-part copy operation is carried out.
* Decreasing the minimum part size will cause a large number of copy part requests being
* initiated.
*/
private long multipartCopyPartSize = DEFAULT_MINIMUM_COPY_PART_SIZE;
/**
* Returns the minimum part size for upload parts. Decreasing the minimum part size causes
* multipart uploads to be split into a larger number of smaller parts. Setting this value too
* low has a negative effect on transfer speeds, causing extra latency and network communication
* for each part.
*
* @return The minimum part size for upload parts.
*/
public long getMinimumUploadPartSize() {
return minimumUploadPartSize;
}
/**
* Sets the minimum part size for upload parts. Decreasing the minimum part size causes
* multipart uploads to be split into a larger number of smaller parts. Setting this value too
* low has a negative effect on transfer speeds, causing extra latency and network communication
* for each part.
*
* @param minimumUploadPartSize The minimum part size for upload parts.
*/
public void setMinimumUploadPartSize(long minimumUploadPartSize) {
this.minimumUploadPartSize = minimumUploadPartSize;
}
/**
* Returns the size threshold in bytes for when to use multipart uploads. Uploads over this size
* will automatically use a multipart upload strategy, while uploads smaller than this threshold
* will use a single connection to upload the whole object.
*
* Multipart uploads are easier to recover from and potentially faster than single part uploads,
* especially when the upload parts can be uploaded in parallel as with files. Due to additional
* network communication, small uploads should use a single connection for the upload.
*
* @return The size threshold in bytes for when to use multipart uploads.
*/
public long getMultipartUploadThreshold() {
return multipartUploadThreshold;
}
/**
* Sets the size threshold in bytes for when to use multipart uploads. Uploads over this size
* will automatically use a multipart upload strategy, while uploads smaller than this threshold
* will use a single connection to upload the whole object.
*
* Multipart uploads are easier to recover from and potentially faster than single part uploads,
* especially when the upload parts can be uploaded in parallel as with files. Due to additional
* network communication, small uploads should use a single connection for the upload.
*
* @param multipartUploadThreshold The size threshold in bytes for when to use multipart
* uploads.
*/
public void setMultipartUploadThreshold(long multipartUploadThreshold) {
this.multipartUploadThreshold = multipartUploadThreshold;
}
/**
* Returns the minimum size in bytes of each part in a multi-part copy request. Decreasing this
* size will result in increase in the number of copy part requests to the server.
*
* @return The minimum size in bytes for each part in a multi-part copy request.
*/
public long getMultipartCopyPartSize() {
return multipartCopyPartSize;
}
/**
* Sets the minimum part size in bytes for each part in a multi-part copy request. Decreasing
* this size will result in increase in the number of copy part requests to the server.
*
* @param multipartCopyPartSize The minimum size in bytes for each part in a multi part copy
* request.
*/
public void setMultipartCopyPartSize(long multipartCopyPartSize) {
this.multipartCopyPartSize = multipartCopyPartSize;
}
/**
* Returns the maximum threshold size of an COS object after which the copy operation is carried
* out using multi-part request.
*
* @return The size threshold of an COS object for when to use a multi-part copy
*/
public long getMultipartCopyThreshold() {
return multipartCopyThreshold;
}
/**
* Sets the size threshold in bytes for when to use multi-part copy requests. Copy requests for
* objects over this size will automatically use a multi-part copy strategy, while copy requests
* for objects smaller than this threshold will use a single connection to copy the whole
* object.
*
* @param multipartCopyThreshold The size threshold in bytes for when to use multi part copy.
*/
public void setMultipartCopyThreshold(long multipartCopyThreshold) {
this.multipartCopyThreshold = multipartCopyThreshold;
}
}