![]() If the CachePercentDirty metric is high, then check the CloudBytesUploaded metric to see if the upload speed to Amazon S3 is slow. A CachePercentDirty metric that's higher than 80% can indicate slow uploads from the gateway to Amazon S3. Any data that's written to the gateway that isn't already written to Amazon S3 is considered dirty. If you use a file gateway, then check your CachePercentDirty metric. Then, review the CloudBytesUploaded metric to determine the upload speed. Run tests with the file sizes and the number of threads to benchmark the upload speed from the gateway to AWS. This is because Storage Gateway breaks up large files in to multiple parts, and then uploads the parts in parallel streams to the S3 bucket. ![]() When you upload larger files, Storage Gateway generally performs better than when you upload smaller files. Check the size of the files that are written to the Storage Gateway device When you use this configuration, you must create and configure an Amazon Elastic Compute Cloud (Amazon EC2) proxy on your gateway device. To allow traffic to cross the private virtual interface, set up your gateway with an Amazon S3 PrivateLink VPC endpoint. If the public virtual interface or internet connection is congested, then your gateway's upload performance might be affected. In this example, the traffic from the gateway to the S3 bucket crosses the public virtual interface or public internet. For example, the endpoint is for Storage Gateway over AWS Direct Connect or a VPN connection. If you host your gateway on-premises and connect to AWS through a VPC endpoint, then run a different test. When this happens, run a network throughput test from an on-premises VM to an instance in the VPC. ![]() ![]() The endpoint is for Amazon Simple Storage Service (Amazon S3) and connects over an AWS Direct Connect or VPN connection. Or, use a system that's on the same network as your gateway device.įor example, your gateway connects to AWS through an Amazon Virtual Private Cloud (Amazon VPC) endpoint. To determine the available internet bandwidth to your gateway, run a network test from a virtual machine (VM). The internet speed between your gateway and AWS can affect upload performance. Resolution Review your internet bandwidth or network throughput to AWS ![]()
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