I am interested to know whether, when copying an S3 object from 1 bucket to another, the object gets downloaded to the client, even temporarily?
I am using AWS javascript SDK: s3.copyObject(...)
Thanks
They are not downloaded localy. They are executed on the AWS side.
They are free within the same region:
Transfers between S3 buckets or from Amazon S3 to any service(s) within the same AWS Region are free.
Recent AWS blog post explains copying between buckets:
How can I copy objects between Amazon S3 buckets?
Related
I want to copy a folder with large files in it to azure storage.
I found this article that shows how to copy a public aws bucket to azure: https://microsoft.github.io/AzureTipsAndTricks/blog/tip220.html
But how can I do this, if the aws bucket is private? How can I pass the credentials to azcopy for it to copy my files from aws bucket to azure directly?
From Copy data from Amazon S3 to Azure Storage by using AzCopy | Microsoft Docs:
AzCopy is a command-line utility that you can use to copy blobs or files to or from a storage account. This article helps you copy objects, directories, and buckets from Amazon Web Services (AWS) S3 to Azure blob storage by using AzCopy.
The article explains how to provide both Azure and AWS credentials.
One thing to note is that Amazon S3 cannot 'send' data to Azure Blob Storage. Therefore, something will need to call GetObject() on S3 to retrieve the data, and then send it to Azure. I'm assuming that Azure Blob Storage cannot directly request data from Amazon S3, so it means that the data will be 'downloaded' from S3, then 'uploaded' to Azure. To improve efficiency, run the AzCopy command either from an AWS or an Azure virtual machine, to reduce the latency of sending via your own computer.
One solution, albeit not an ideal one is that you could request an AWS Snowball with your bucket data on it, then use Azure Import/Export service to send the Snowball to Azure for ingestion.
Have you tried generating a pre-signed url with limited ttl on it for the duration of the copy?
https://docs.aws.amazon.com/AmazonS3/latest/dev/ShareObjectPreSignedURL.html
that way you can just execute azcopy <aws_presigned_url> <azure_sas_url>
the url contains the information you need for authn/authz on both sides.
I can't find some information about Amazon S3, hope you will help me. When is a file available for user to download, after the POST upload? I mean some small JSON file that doesn't require much processing. Is it available to download immediately after uploading? Or maybe amazon s3 works in some sessions and it always takes a few hours?
According to the doc,
Amazon S3 provides strong read-after-write consistency for PUTs and DELETEs of objects in your Amazon S3 bucket in all AWS Regions.
This means that your objects are available to download immediately after it's uploaded.
An object that is uploaded to an Amazon S3 bucket is available right away. There is no time period that you have to wait. That means if you are writing a client app that uses these objects, you can access them as soon as they are uploaded.
In case anyone is wondering how to programmatically interact with objects located in an Amazon S3 bucket through code, here is an example of uploading and reading objects in an Amazon S3 bucket from a client web app....
Creating an example AWS photo analyzer application using the AWS SDK for Java
I'm in the process of developing a web application (using Angular6) that uses aws amplify.
The storage module provided by amplify lets you store your files in three protective levels (public, protected & private). I have a requirement to process an uploaded file via a lambda function.
My questions is whether the s3 buckets (and 'folders') created via the amplify available to Lambda functions (as the buckets are encrypted to use only via the app)??
would changing CORS on the S3 bucket do the trick?. Any help appreciated.
An S3 bucket that is created by Amplify CLI is like any other S3 bucket. You can access it provided that appropriate permissions are in place. https://docs.aws.amazon.com/AmazonS3/latest/user-guide/set-permissions.html
I'm looking for a way to log when data is copied from my S3 bucket. Most importantly, which file(s) were copied and when. If I had my way, I'd like by who and where but I don't want to get ahead of myself.
A couple of options:
Server Access Logging provides detailed records for the requests that are made to an S3 bucket
AWS CloudTrail captures a subset of API calls for Amazon S3 as events, including calls from the Amazon S3 console and from code calls to the Amazon S3 APIs
When I upload a Lambda function to AWS, via Eclipse/STS, it picks up an S3 bucket dynamically & uploads it to that bucket.
In some cases it picks up an S3 bucket which I would have created for (say) only media storage.
In such cases is it ok to change the location of the lambda to a preferred S3 bucket ?
What would happen if at one instance I upload a lambda to S3 bucket 'A', then during a later instance, I upload the Lambda to another S3 bucket 'B'?
Will this create any reference issues ?
Will the Lambda be stored in both the buckets , latest in both ? or older version in A & latest version on B ?
The Lambda function deployment file is just stored in S3 so it can be in a location that the Lambda service can load it from. Once the Lambda service loads it from S3 once, the file in S3 is never used again and can safely be deleted.
It is definitely safe, and preferable, to change the the S3 bucket being used to the bucket you prefer. I don't use Eclipse, but I find it ridiculous that it would just pick a bucket randomly. Surely there is a setting somewhere to tell it what bucket to use.