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72 lines
3.0 KiB
Markdown
72 lines
3.0 KiB
Markdown
# Data Source Management
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Data sources in Cacti are the points of data that Cacti will collect from a
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device. The following are examples of different sources that can be utililised
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for graphing, though is just the surface of what is achievable:
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- Monitoring a device via ping will usually count as 1 data source.
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- A 24 port switch and you poll the device via snmp and graph all of the ports
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then there will be 24 data sources
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> **Note**: if you add more graphs that base their data on the original **Data
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> source** that would not count as another **Data Source** since it uses the
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> already existing source.
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For example, if you have a 24 port switch that you create an **In/Out Bits**
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graph for each interface, and you then add the **In/Out Bits with 95th
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Percentile** for each interface, you would still only have 24 data sources.
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Keeping on top of the amount of data sources you have is important as the more
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data sources you have the more resources you will need to allocate to your
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server.
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You can see how many data sources are associated with a single device by going
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to management then clicking on devices.
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You can also see the total amount of data sources by checking the poller stats
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on the system. Click the log tab and filter by stats and lookout for the below
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messege
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```console
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2019/05/24 17:21:11 - SYSTEM STATS: Time:9.5913 Method:spine Processes:2 Threads:2 Hosts:14 HostsPerProcess:7 DataSources:162 RRDsProcessed:117
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```
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This output tells us we have 162 data sources on the system.
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### Storage considerations and datasources
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The amount of data sources on your system has an impact on the amount of storage
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you will need. You will also need to consider what rate you are polling your
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devices. e.g. 1 minute or 5 Minute polls
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Here is the approximate amount of storage you can expect to consume per data
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source
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| Polling time | Retention | File size | Polling time | Retention | File size |
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| -----------: | --------- | --------: | -----------: | --------- | --------: |
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| 30 second | Daily | 48kb | 30 second | Weekly | 43kb |
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| 30 second | Monthly | 46kb | 30 second | Yearly | 140kb |
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| 1 minute | Daily | 93kb | 1 minute | Weekly | 45kb |
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| 1 minute | Monthly | 47kb | 1 minute | Yearly | 140kb |
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| 5 minute | Daily | 19b | 5 minute | Weekly | 22kb |
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| 5 minute | Monthly | 25kb | 5 minute | Yearly | 26kb |
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### Viewing all Data sources by device
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You are able to check the data sources associated to a specific device in the
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Console -> Management -> Data sources You can then search based on a device you
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may be interested in to view the Data sources in use
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You can also view Orphaned data sources in this view by setting Orphaned from
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All to Orphaned Orphaned data sources are where the graph has been deleted but
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the data source was not deleted
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---
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Copyright (c) 2004-2026 The Cacti Group
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