Quotas & Limits

This document contains current API restrictions and usage quotas on use of Storage Transfer Service. This page is updated when there are changes to these restrictions and usage quotas.

These quotas apply to each Storage Transfer Service project and each user, and are shared across all applications and API versions used by a given developer project.

Note: Storage Transfer Service supports URL lists with a maximum size of 128 MB. See Creating a URL List.

Concurrent transferOperations limit

The following table describes the limit for concurrent in-progress transferOperations:

Maximum in-progress `transferOperations`	Applies to
200	project

Note: When the number of in-progress transferOperations in a project reaches the limit, new and resumed transferOperations beyond the limit are placed in QUEUED status. As in-progress transferOperations complete, any QUEUED transferOperations are moved to IN_PROGRESS status.

Read quotas

Storage Transfer Service implements quotas on the following requests for reading data:

• transferJobs — calls to get and list.
• transferOperations — calls to get and list.
• googleServiceAccount — calls to get.

The following table describes the quotas we implement on the API requests listed above:

Maximum requests	Duration	Applies to
500	100 seconds	user
2500	100 seconds	project

Create quotas

The following table describes quotas for transferJobs create requests:

Maximum requests	Duration	Applies to
1000	1 day	project
100	100 seconds	user
1000	100 seconds	project

Patch quotas

The following table describes quotas for transferJobs patch requests:

Maximum requests	Duration	Applies to
100	100 seconds	user
1000	100 seconds	project

Write quotas

Storage Transfer Service implements quotas for the following transferOperations requests to write data:

• pause
• resume
• cancel

The following table describes the quotas we implement on the requests listed above:

Maximum requests	Duration	Applies to
100	100 seconds	user
1500	100 seconds	project

Adjusting quotas

For information on adjusting quotas, see Managing your quota.