我正在使用不支持 MultipartUpload 的 S3 兼容后端。
我有一个奇怪的情况，当我上传文件时，有些服务器可以正常完成，但在其他服务器中，boto3 会自动尝试使用 MultipartUpload 上传文件。我尝试上传的文件与用于相同后端、区域/租户、存储桶等的测试目的的文件完全相同......
作为documentation显示，MultipartUpload 在需要时自动启用:
- Automatically switching to multipart transfers when a file is over a specific size threshold
下面是自动切换到MultipartUpload时的一些日志:
自动切换到 MultipartUpload 时记录:
DEBUG:botocore.hooks:Event request-created.s3.CreateMultipartUpload: calling handler <function enable_upload_callbacks at 0x2b001b8>
DEBUG:botocore.endpoint:Sending http request: <PreparedRequest [POST]>
INFO:botocore.vendored.requests.packages.urllib3.connectionpool:Starting new HTTP connection (1): mytenant.mys3backend.cloud.corp
DEBUG:botocore.vendored.requests.packages.urllib3.connectionpool:"POST /cassandra/samplefile.tgz?uploads HTTP/1.1" 501 None
DEBUG:botocore.parsers:Response headers: {'date': 'Fri, 18 Dec 2015 09:12:48 GMT', 'transfer-encoding': 'chunked', 'content-type': 'application/xml;charset=UTF-8', 'server': 'HCP V7.2.0.26'}
DEBUG:botocore.parsers:Response body:
<?xml version='1.0' encoding='UTF-8'?>
<Error>
<Code>NotImplemented</Code>
<Message>The request requires functionality that is not implemented in the current release</Message>
<RequestId>1450429968948</RequestId>
<HostId>aGRpLmJvc3RoY3AuY2xvdWQuY29ycDoyNg==</HostId>
</Error>
DEBUG:botocore.hooks:Event needs-retry.s3.CreateMultipartUpload: calling handler <botocore.retryhandler.RetryHandler object at 0x2a490d0>
不切换到多部分的日志，来自其他服务器但针对同一文件:
DEBUG:botocore.hooks:Event request-created.s3.PutObject: calling handler <function enable_upload_callbacks at 0x7f436c025500>
DEBUG:botocore.endpoint:Sending http request: <PreparedRequest [PUT]>
INFO:botocore.vendored.requests.packages.urllib3.connectionpool:Starting new HTTP connection (1): mytenant.mys3backend.cloud.corp
DEBUG:botocore.awsrequest:Waiting for 100 Continue response.
DEBUG:botocore.awsrequest:100 Continue response seen, now sending request body.
DEBUG:botocore.vendored.requests.packages.urllib3.connectionpool:"PUT /cassandra/samplefile.tgz HTTP/1.1" 200 0
DEBUG:botocore.parsers:Response headers: {'date': 'Fri, 18 Dec 2015 10:05:25 GMT', 'content-length': '0', 'etag': '"b407e71de028fe62fd9f2f799e606855"', 'server': 'HCP V7.2.0.26'}
DEBUG:botocore.parsers:Response body:
DEBUG:botocore.hooks:Event needs-retry.s3.PutObject: calling handler <botocore.retryhandler.RetryHandler object at 0x7f436be1ecd0>
DEBUG:botocore.retryhandler:No retry needed.
我上传的文件如下:
connection = boto3.client(service_name='s3',
region_name='',
api_version=None,
use_ssl=True,
verify=True,
endpoint_url=url,
aws_access_key_id=access_key,
aws_secret_access_key=secret_key,
aws_session_token=None,
config=None)
connection.upload_file('/tmp/samplefile.tgz','mybucket','remotefile.tgz')
问题是:
- 为了避免自动切换到分段上传，如何 我默认禁用 MultipartUpload 还是提高阈值？
- 一台服务器使用自动多部分而其他服务器不使用同一文件是否有任何原因？
请您参考如下方法:
我找到了一个解决方法，使用 S3Transfer 和 Transferconfig 增加阈值大小，如下所示:
myconfig = TransferConfig(
multipart_threshold=9999999999999999, # workaround for 'disable' auto multipart upload
max_concurrency=10,
num_download_attempts=10,
)
connection = boto3.client(service_name='s3',
region_name='',
api_version=None,
use_ssl=True,
verify=True,
endpoint_url=url,
aws_access_key_id=access_key,
aws_secret_access_key=secret_key,
aws_session_token=None,
config=None)
transfer=S3Transfer(connection,myconfig)
transfer.upload_file('/tmp/samplefile.tgz','mybucket','remotefile.tgz')
希望对大家有帮助
