# Data Source Profiles

This section will describe **Data Source Profiles** in Cacti.

![Data Source Profiles](images/data-source-profiles.png)

![Data Source Profiles Edit](images/data-source-profiles-edit1.png)

The following values are for the disk usage per Data source for the respective
data profile

| polling time | type    | size per ds | polling time | type   | size per ds |
| -----------: | ------- | ----------: | -----------: | ------ | ----------: |
|    30 second | Daily   |        48kb |    30 second | Weekly |        43kb |
|    30 second | Monthly |        46kb |    30 second | Yearly |       140kb |
|     1 minute | Daily   |        93kb |     1 minute | Weekly |        45kb |
|     1 minute | Monthly |        47kb |     1 minute | Yearly |       140kb |
|     5 minute | Daily   |        19kb |     5 minute | Weekly |        22kb |
|     5 minute | Monthly |        25kb |     5 minute | Yearly |        26kb |

![Data Source Profiles RRA Edit](images/data-source-profiles-edit2.png)

## Changing data profile averages

The Cacti GUI allows you to change the averages on a specific Data source
profile some setups require a higher resolution of data and you may want to
change the averaging to keep the most data this will come with a cost of storage
due to the bigger sized RRDfile

To do this follow these steps

### Method 1 - New system without any hosts

1. Login to Cacti

2. Click on Presets >> Data Profiles

3. Select the profile you want to edit i.e 1 minute collection

4. Select the period which you want to edit i.e weekly

5. If you wish to change the average select the aggregate level for 1 minute you
   will be able to go as low as 5 Minutes

6. You will need to edit the Rows amount to match the data retention you want to
   set after this period the data will be averaged out to the monthly graph

7. Save config and generate graphs

### Method 2 - Existing device(s) on system

This is a more data destructive route and it will depend on your situation. If
you have graphs already on cacti you will not be able to use Method 1. An option
if you do not care about the graphs is to either remove the graphs via the gui
or run the following script `/cli/php remove_graphs.php with the --all`
function.

This will REMOVE ALL THE GRAPHS and you can then follow the steps outlined in
Method 1 to change the profile how you like

## Data profile Rows Calculation

The rows calculation take in to account the following

```console
Rows = Aggregate level \* hours
```

> **Example**
>
> 1 Minute aggregate level storing for 3 days ( 72 hours)
>
> (Aggregate level)60 \* 72 ( 72 hours) = 4,320

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