# Data retention policy and server infrastructure

> Learn how and where the data you send to Talon.One is stored and how our infrastructure ensures high availability. Also learn how long we retain the data you send to Talon.One.

> For the complete documentation index, see [llms.txt](https://docs.talon.one/llms.txt).

## Data retention policy

By default, we retain the data sent to Talon.One for the following periods:

| Type of data                                                                                                                       | Retention period (days) |
| ---------------------------------------------------------------------------------------------------------------------------------- | ----------------------- |
| [Events](/docs/dev/concepts/entities/events)                                                                                    | 30                      |
| [Customer sessions](/docs/dev/concepts/entities/customer-sessions)                                                              | 30                      |
| [Effects](/docs/product/rules/effects/overview)                                                                                 | 30                      |
| [Audit logs](/docs/product/account/logs/audit-logs)                                                                             | 90                      |
| [Integration API logs](/docs/product/account/logs/integration-api-logs)                                                         | 7                       |
| [Notification logs](/docs/product/account/logs/notification-logs)                                                               | 7                       |
| [Webhook logs](/docs/product/account/logs/webhook-logs)                                                                         | 7                       |
| Rule failure reasons(returned by the [Update customer session](/integration-api#tag/Customer-sessions/operation/updateCustomerSessionV2) endpoint) | 7                       |

[Customer profiles](/docs/product/applications/display-customer-profiles#customer-profile-overview),
[loyalty tiers](/docs/product/loyalty-programs/profile-based/use-loyalty-tiers),
[loyalty points](/docs/product/loyalty-programs/manage-loyalty-programs#points),
[loyalty transactions](/integration-api#tag/Loyalty/operation/getLoyaltyProgramProfileTransactions),
[achievements](/docs/product/achievements/overview),
[coupons](/docs/product/campaigns/coupons/coupon-page-overview),
and [referrals](/docs/product/campaigns/referrals/referral-overview) are not affected by this policy.

Custom data retention plans are stated in your contract with Talon.One and can be modified
further to suit your needs. To make changes, contact our [account team](mailto:support@talon.one).

## Server infrastructure

Our infrastructure is three-time redundant, self-checking, self-healing and
distributed over several availability zones to ensure high availability.

We use a Kubernetes cluster, that:

- Stretches over two different Google Cloud availability zones.
- Runs every production deployment on at least one instance per zone.
- Features a synchronized master in each zone.

Our cluster has automatic health checks on both hardware and software. This ensures an
appropriate distribution of load across all healthy machines and automatic discovery,
isolation, and replacement of faulty components resulting in excellent reliability.

Our active-active database servers have a standby copy in a second availability zone with
automatic handover in the case of catastrophic failure. They also have a separate backup
mechanism allowing us to go back to any point in time within the last seven days.

Each customer instance is stored in its own VPC.

<Architecture alt="Architecture of the platform." width="90%" className="figma" />

## Deployment locations

When you integrate with Talon.One, you can select from the following available
deployment locations:

- St Ghislain, Belgium (`europe-west1`)
- London, England (`europe-west2`)
- Ashburn, Virginia, USA (`us-east4`)
- The Dalles, Oregon, USA (`us-west1`)
- Los Angeles, California, USA (`us-west2`)
- Jurong West, Singapore (`asia-southeast1`)
- Jakarta, Indonesia (`asia-southeast2`)
- Sydney, Australia (`australia-southeast1`)