Hey
Excuse me but I have just installed Cacti and I don't understand what I must write in the fields :
Index Type
Index Value
OutputID
Moreover, I would like to know what represent the graph "Load Average" because the mesures are expressed in "m", 500 m for my server ?!?
Thank you
Index Type Index Value OutputID Load Average
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These values vary depending on what data tamplate you are using, so there is no simple answer. Unfortnately I donàt have access to my cacti system at the moment, so I canàt give you super detailed advice....
First off, these values are only used for Indexed MIB variables. The most commonly used in Cacti is the interface variable, but there are loads of other indexed variables out there. In your case the disk space is probably indexed.
Since it is important to understand this indexing concept, I'll explain it in some detail using network interfaces as an example. MIB variables stand for one piece of information like total traffic, errors, discards, multicast packets..... However, it is often possible to have more than one source for this data (I.E. a switch can have several hundred network interfaces). To keep these interfaces separate when querying a device for a single piece of information, an index value is added to the end of the normal MIB variable. This index value is used to distinguish one interface from the others on all MIB variables associated with that interface. However, this value is not fixed. It can change any time that the device is rebooted.
Now, on to your question.
Index Type: This tells cacti what piece of information to use for tracking indexed OIDs. From above you know that an index can change. This field allows cacti to work around changing index values. Any MIB variable that returns a consistant and unique value can be used to index your information. Following my interface example, you can index off of the actual index value (which may change) or you can use something like ifname (Interface name) which is not going to change over time. To find out what values you can use, open up the XML file associated with your dat query. Look in the <fields> section. The tag for the indvidual mib variable is what must be entered into the Index type field (without the <>).
Index Value: This is the index value that uniquely defines the object that you want to track. If you are using an index value, than this will be a positive integer. If you are using something else, such as the Ifname, then it can be just about anything. On a cisco switch this will normally be something like 1/4.
Output ID: Not certain, I'll have to look at thisone when I have access to my Cacti server again.
I hope that this is more helpful than confusing. If you want more information, just ask....
Mike
First off, these values are only used for Indexed MIB variables. The most commonly used in Cacti is the interface variable, but there are loads of other indexed variables out there. In your case the disk space is probably indexed.
Since it is important to understand this indexing concept, I'll explain it in some detail using network interfaces as an example. MIB variables stand for one piece of information like total traffic, errors, discards, multicast packets..... However, it is often possible to have more than one source for this data (I.E. a switch can have several hundred network interfaces). To keep these interfaces separate when querying a device for a single piece of information, an index value is added to the end of the normal MIB variable. This index value is used to distinguish one interface from the others on all MIB variables associated with that interface. However, this value is not fixed. It can change any time that the device is rebooted.
Now, on to your question.
Index Type: This tells cacti what piece of information to use for tracking indexed OIDs. From above you know that an index can change. This field allows cacti to work around changing index values. Any MIB variable that returns a consistant and unique value can be used to index your information. Following my interface example, you can index off of the actual index value (which may change) or you can use something like ifname (Interface name) which is not going to change over time. To find out what values you can use, open up the XML file associated with your dat query. Look in the <fields> section. The tag for the indvidual mib variable is what must be entered into the Index type field (without the <>).
Index Value: This is the index value that uniquely defines the object that you want to track. If you are using an index value, than this will be a positive integer. If you are using something else, such as the Ifname, then it can be just about anything. On a cisco switch this will normally be something like 1/4.
Output ID: Not certain, I'll have to look at thisone when I have access to my Cacti server again.
I hope that this is more helpful than confusing. If you want more information, just ask....
Mike
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