# AWS DataSync quotas
<a name="datasync-limits"></a>

Find out about resource quotas and limits when working with AWS DataSync.

## Storage system, file, and object limits
<a name="file-system-limits"></a>

The following table describes the limits that DataSync has when working with storage systems, files, and objects.


| Description | Limit | 
| --- | --- | 
|  Maximum total file path length  |  4,096 bytes  | 
|  Maximum file path component (file name, directory, or subdirectory) length  |  255 bytes  | 
|  Maximum length of Windows domain  |  253 characters  | 
|  Maximum length of server hostname  |  255 characters  | 
|  Maximum Amazon S3 object name length  |  1,024 UTF-8 characters  | 

## DataSync quotas
<a name="task-hard-limits"></a>

The following table describes the quotas for DataSync resources in a specific AWS account and Region.


| Resource | Quota | Adjustable | 
| --- | --- | --- | 
|  Maximum number of tasks you can create  |  100  |  Yes  | 
|  **(Enhanced mode tasks)** Maximum number of source and destination objects that DataSync can work with per task execution For more information, see [How DataSync transfers files, objects, and directories](how-datasync-transfer-works.md#transferring-files)  | Virtually unlimited | N/A | 
|  **(Basic mode tasks)** Maximum number of source and destination files, objects, and directories that DataSync can work with per task execution between on-premises, self-managed, or other cloud storage and AWS storage services  For more information, see [How DataSync transfers files, objects, and directories](how-datasync-transfer-works.md#transferring-files)  |  50 million  Remember the following about this quota:   If you transfer Amazon S3 objects with prefixes, the prefixes are treated as directories and count towards the quota. For example, DataSync would consider`s3://bucket/foo/bar.txt` as two directories (`./` and `./foo/`) and one object (`bar.txt`).   If your task is working with more than 20 million files, objects, or directories, make sure that you allocate a minimum of 64 GB of RAM to your DataSync agent. For more information, see [agent requirements for DataSync transfers](agent-requirements.md#agent-tranfer-resource-requirements).     |  Yes  Instead of requesting an increase, you can create tasks that focus on specific directories using include and exclude filters. For more information, see [filtering the data transferred by DataSync](https://docs.aws.amazon.com/datasync/latest/userguide/filtering.html).   | 
|  **(Basic mode tasks)** Maximum number of source and destination files, objects, and directories that DataSync can work with per task execution between AWS storage services For more information, see [How DataSync transfers files, objects, and directories](how-datasync-transfer-works.md#transferring-files)  |  25 million  If you transfer Amazon S3 objects with prefixes, the prefixes are treated as directories and count towards the quota. For example, DataSync would consider`s3://bucket/foo/bar.txt` as two directories (`./` and `./foo/`) and one object (`bar.txt`).   |  Yes  Instead of requesting an increase, you can create tasks that focus on specific directories using include and exclude filters. For more information, see [filtering the data transferred by DataSync](https://docs.aws.amazon.com/datasync/latest/userguide/filtering.html).   | 
|  Maximum throughput per task (for transfers that use a DataSync agent)  |  10 Gbps  |  No  | 
|  Maximum throughput per task (for transfers that don't use a DataSync agent)  |  5 Gbps  |  No  | 
| Maximum number of characters you can include in a task filter |  102,400 characters  If you're using the DataSync console, this limit includes all the characters combined in your include and exclude patterns.   | No | 
| Maximum number of queued executions for a single task | 50 | No | 
|  Maximum number of concurrent Enhanced mode task executions  |  120  | No | 
| Maximum number of days a task execution's history is retained | 30 | No | 
| Maximum size for a manifest file with Enhanced mode tasks | 20 GB | No | 

## Request a quota increase
<a name="request-quota-increase"></a>

You can request an increase for some DataSync quotas. Increases aren't granted right away and might take a couple of days to take effect.

**To request a quota increase**

1. Open the Service Quotas console at [https://console.aws.amazon.com/servicequotas/](https://console.aws.amazon.com/servicequotas/).

1. In the navigation pane, choose **AWS services** and then choose **AWS DataSync**.

1. Choose the quota that you want to increase, then choose **Request increase at account-level**.

1. Enter the total amount that you want the quota to be, then choose **Request**.

   If you need to increase a different quota, fill out a separate request.