---
title: Google Cloud Pub/Sub
slug: litmusedge/product-features/integration/integration-connectors/google/google-cloud-pubsub
description: Review parameters for the Google Cloud Pub/Sub connector. 
docTags: 
createdAt: 2023-12-01T18:41:10.228Z
---

The Google Cloud Pub/Sub integration enables Litmus Edge (LE) to connect to Google Cloud Pub/Sub for publishing and receiving messages.

## Supported communication

- Outbound (Publish data from Edge to Google Cloud Pub/Sub) - Yes
- Inbound (Subscribe data from Google Cloud Pub/Sub to Edge) - Yes

## Configurations

| **Field**                              | **Details**                                                                                                                                                                            | **Required** |
| -------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ |
| Name                                   | Connector name.                                                                                                                                                                        | Yes          |
| Credentials (.json)                    | Service account credentials JSON.                                                                                                                                                      | Yes          |
| Project ID                             | The project ID of the cloud project.                                                                                                                                                   | Yes          |
| Private Key ID                         | Optional override for the `private_key_id` field inside the credentials JSON.                                                                                                          | No           |
| Client Email                           | Optional override for the `client_email` field inside the credentials JSON.                                                                                                            | No           |
| Default Topic                          | Default Pub/Sub topic. Accepts a bare topic name or the fully-qualified path `projects/{project}/topics/{topic}`.                                                                      | Yes          |
| Custom Attributes                      | Static attributes attached to every published message.                                                                                                                                 | No           |
| Parallel Publish Count                 | Number of messages published in parallel. Higher values increase throughput and resource usage.                                                                                        | Yes          |
| Ack deadline (seconds)                 | Ack deadline applied to subscriptions created by this connector.                                                                                                                       | No           |
| Publish byte threshold                 | Publisher batch size in bytes.                                                                                                                                                         | No           |
| Publish count threshold                | Publisher batch size in message count.                                                                                                                                                 | No           |
| Publish delay threshold (milliseconds) | Maximum time the publisher waits before flushing a partial batch.                                                                                                                      | No           |
| Connect timeout (seconds)              | Timeout for establishing a new client connection to Pub/Sub.                                                                                                                           | No           |
| Throttling limit                       | Set a limit on the number of outbound messages per second. If sending data to a server that has restrictions on the rate of incoming messages, this ensures that no messages are lost. | No           |

## Persistent storage configurations

| **Field**                     | **Details**                                                                                                                                                                                          | **Required** |
| ----------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------ |
| Persistent storage            | If enabled, messages in the outbound queue are stored on disk. If there are interruptions in connection or power loss, messages are retained and eventually sent when the connection is restored.    | No           |
| Persistent storage size limit | Set the size limit for storing persisted data in GB.                                                                                                                                                 | No           |
| Queue mode                    | Select the sequence of data transfer: `FIFO` or `LIFO`. Selecting `FIFO` (First In First Out) sends the earliest message first. Selecting `LIFO` (Last In First Out) sends the latest message first. | No           |

## Related topics

- [Google Cloud Pub/Sub Integration Guide](docId:_mG_GvlZJruEYskaWdJLk)
- [Add a Connector](docId:4YVfCEP7GYScJHMKYFCuM)
- [Manage Connectors](docId\:tQoP7QtquSQqDq9yhbJ34)