> For the complete documentation index, see [llms.txt](https://docs.exavault.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.exavault.com/connection-methods/sftp/maximizing-sftp-performance.md).

# Maximizing SFTP Performance

SFTP requires several request-and-response exchanges during a transfer, so network latency and client settings can have a large effect on throughput. Tune the client settings below, then measure performance with representative files.

## Maximize the Buffer Size (Data Chunk Size) in Your SFTP Client

Many SFTP clients send data in 32-kilobyte chunks.

Test a larger value, beginning with 128 kilobytes. Increase it gradually and compare results; the best value depends on the client and network path.

With the command-line `sftp` client, use the `-B` option:

```bash
sftp -B 128000 username@files.example.com
```

For any other client, look for settings related to buffer size or data chunk size and raise them.

## Use Many Parallel Connections

When transferring many files, configure 10 to 25 simultaneous connections or the maximum supported by the client.

In FileZilla, open *Edit > Settings > Transfers* and increase the *Maximum simultaneous transfers* setting to 10.

In Cyberduck, open *Edit > Preferences > Transfers* and set *Transfer Files* to *Open multiple connections*. Then open *Window > Transfers* and increase the counter in the lower-right corner.

Increasing the number of simultaneous connections helps when uploading multiple files at the same time but has no effect when uploading a single file.

## Minimize Network Latency

Network latency is the round-trip delay between sending data and receiving a response. Higher latency can be caused by:

* The physical limitations of the network connection
* Other traffic consuming the connection's capacity
* The network distance between the client and appliance
* Network tools or policies that regulate bandwidth

Network latency has a large impact on SFTP performance. Use the shortest practical network path and a stable wired connection when available.