AWS Transfer Family SFTP connectors - AWS Transfer Family
Quotas for SFTP connectors

AWS Transfer Family SFTP connectors

AWS Transfer Family SFTP connectors establish a relationship for sending files and messages between Amazon storage and an external partner, using the SFTP protocol. You can send files from Amazon S3 to an external, partner-owned destination. You can also use an SFTP connector to retrieve files from a partner's SFTP server.

Note

Currently, SFTP connectors can only be used to connect to remote SFTP servers that offer an internet-accessible endpoint.

The following video provides a brief introduction to Transfer Family SFTP connectors.

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Quotas for SFTP connectors

The following quotas are in place for SFTP connectors.

Note

More service quotas for SFTP connectors are listed in AWS Transfer Family endpoints and quotas in the Amazon Web Services General Reference.

SFTP connector quotas
Name Default Adjustable
Maximum test connection transactions per second (TPS) 1 request per second, per account No
Maximum queue size for pending file transfers 1000 No
Maximum file size 150 gibibytes (GiB) No
Maximum transfer time per file 12 hours No
Maximum request wait time per file 6 hours No
Maximum bandwidth for connectors per account (both SFTP and AS2 connectors contribute to this value) 50 MBps No
Maximum number of items for directory listing operations 10,000 No
Maximum number of files per StartFileTransfer request 10 No
Note

By default, SFTP connectors process one file at a time, transferring files sequentially. You have an option to accelerate transfer performance by having your connectors create concurrent sessions with remote servers that support concurrent sessions from the same user, and process up to 5 files in parallel.

To enable concurrent connections for any connector, contact AWS Support at Contact AWS to submit a quota increase request to the AWS Transfer Family service team.

For storing the credentials for SFTP connectors, there are quotas associated with each Secrets Manager secret. If you use the same secret to store multiple types of keys, for multiple purposes, you may encounter these quotas.

  • Total length for a single secret: 12,000 characters

  • Maximum length of the Password string: 1024 characters

  • Maximum length of the PrivateKey string: 8192 characters

  • Maximum length of the Username string: 100 characters