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https://issues.apache.org/jira/browse/IOTDB-519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17099488#comment-17099488
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Xiangdong Huang commented on IOTDB-519:
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Hi [~badrul_c], sorry for late reply.
Is there any progress?
>> A.ph.B.ph.ph.C
I am not entirely sure why we need a placeholder, could you share an example of
its use please?
Ok,... let's see the follwoing example:
Suppose a user creates a time series "root.sg.China.Beijing.DC1.H1" to
represent a device (here, the device is a server) where country = China, city =
Beijing, data center = DC1, and model = Dell.
Then we have $order(country)=1$, $order(city)=2$, $order(data center)=3$ and
$order(model)=4$, right?
Now if we have more timeseries which have all the above tags, everything is
fine... like:
root.sg.China.Shanghai.DC2.Dell,
root.sg.USA.NewYork.DC1.IBM,
...
Consider the user wants to create another timeseries, to collect the data of
all the devices that model=Dell,
then he/she may create a time series which has only one tag: model = dell. If
so, how to create a time series in IoTDB? root.sg.dell? or root.sg.ph.ph.dell?
It has to be the latter. It is because we only know $order(model) = 4$.
> Apache IoTDB integration with Prometheus
> ----------------------------------------
>
> Key: IOTDB-519
> URL: https://issues.apache.org/jira/browse/IOTDB-519
> Project: Apache IoTDB
> Issue Type: Wish
> Components: Others
> Reporter: Xiangdong Huang
> Priority: Major
> Labels: gsoc2020, iotdb, mentor
> Attachments: image-2020-03-07-15-24-34-192.png,
> image-2020-03-07-15-24-51-531.png, image-2020-03-07-15-25-08-037.png,
> prometheus-iotdb-schema.md
>
>
> IoTDB is a highly efficient time series database.
> Prometheus is a monitoring and alerting toolkit, which supports collecting
> data from other systems, servers, and IoT devices, saving data into a DB,
> visualizing data and provides some query APIs.
>
> Prometheus allows users to use their database rather than just Prometheus DB
> for storing time series databases.
> This proposal is for integrating IoTDB with Prometheus.
>
> You should know:
> * How to use Prometheus
> * How to use IoTDB
> * Java and Go language
> difficulty: Major
> mentors:
> [email protected]
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