---
title: InfluxDB Cloud internals
description: <h3 id="influxdb-cloud-data-durability"><a href="/influxdb/cloud/reference/internals/durability/" target="">InfluxDB Cloud data durability</a></h3> <p>InfluxDB Cloud ensures the durability of all stored data by replicating data across multiple availability zones in a cloud region, automatically creating backups, and verifying that replicated data is consistent and readable.</p> <h3 id="influxdb-cloud-security"><a href="/influxdb/cloud/reference/internals/security/" target="">InfluxDB Cloud secur
url: https://docs.influxdata.com/influxdb/cloud/reference/internals/
estimated_tokens: 407
product: InfluxDB Cloud (TSM)
version: cloud
---

# InfluxDB Cloud internals

### [InfluxDB Cloud data durability](/influxdb/cloud/reference/internals/durability/)

InfluxDB Cloud ensures the durability of all stored data by replicating data across multiple availability zones in a cloud region, automatically creating backups, and verifying that replicated data is consistent and readable.

### [InfluxDB Cloud security](/influxdb/cloud/reference/internals/security/)

InfluxDB Cloud is built on industry-standard security practices and principles.

### [InfluxDB Cloud system buckets](/influxdb/cloud/reference/internals/system-buckets/)

InfluxDB system buckets contain time series data used by and generated from the InfluxDB monitoring and alerting system and the task engine.

### [Time To Become Readable](/influxdb/cloud/reference/internals/ttbr/)

**Time To Become Readable (TTBR)** is the delay between when you write data to InfluxDB Cloud and when that data becomes queryable. TTBR is variable and is affected by many factors.

### [Data retention in InfluxDB Cloud](/influxdb/cloud/reference/internals/data-retention/)

The InfluxDB Cloud retention service checks for and removes data with timestamps beyond the defined retention period of the bucket the data is stored in.