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76 lines
2.3 KiB
Markdown
76 lines
2.3 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
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the ports 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 source
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that would not count as another data source since it uses the already existing
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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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Percential** 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
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to your 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 managment 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 source
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###### 30 second polling
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Retention | File size
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------------- |:-------------:
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Daily | 48kb
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Weekly | 43kb
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Monthly | 46kb
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Yearly | 140kb
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###### 1 minute polling
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Retention | File size
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------------- |:-------------:
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Daily | 93kb
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Weekly | 45kb
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Monthly | 47kb
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Yearly | 140kb
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###### 5 minute polling
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Retention | File size
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------------- |:-------------:
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Daily | 19b
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Weekly | 22kb
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Monthly | 25kb
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Yearly | 26kb
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---
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Copyright (c) 2004-2021 The Cacti Group
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