Hi,
If so, I think I need to add a new API to allow you continue to write data
in an existing but not closed correctly TsFile. Then everything is fine
for you :D
Best,
---
Xiangdong Huang
School of Software, Tsinghua University
黄向东
清华大学 软件学院
Julian Feinauer
Hey Xiangdong,
thanks for the great explanation.
And in fact, I agree with you that it would be best if we start to play around
with it and reply all our findings or wishes back to this list (in fact that
proved to be beneficial in plc4x as well).
You confirm my thoughts about the two
Hi,
TsFile API is not deprecated. In fact, it is designed for this scenario and
MapReduce/Spark computing.
If you just use Reader and Writer API, there is something you need to know:
Let's suppose your block size is x Bytes, (tsfile-format.properties:
group_size_in_byte).
1. If you write data
Hi Xiangdong,
thanks for the info.
How is it in the case when you use the Reader / Writer API for the tsfiles
directly (or should this be considered "deprecated")?
Can these files come to corrupted state?
One Situation where we have to deal with these situations is "at the edge" when
we have
Hi,
IoTDB can support either on a server with 7*24 or a RaspberryPi. We have
tested both the two scenario.
When you shutdown an IoTDB instance in force (e.g., power off) and restart
it again, no data loses ( if you enable the WAL).
However, currently we do not optimize the time cost of the
Hello development-team
First of all thanks for developing this kind of interesting project and
bringing it into apache incubator.
I have a question regarding the place of operation and robustness:
* Is iotDB concepted as application on a server which is running 24/7 or
* Is it also
Hi Xiangdong,
thanks for the hint.
We should definetly try to keep it similar, yes.
I already pushed a minimal working example based on a tsfile [1].
And I would be happy to cooperate with Tianan and Wangminhao (we already had
some mail exchanges).
Julian
[1]
Hi Julian,
Great to hear that you are working on Calcite integration.
I think, we can consider how the SparkSQL-IoTDB adapter is designed, which
is mainly developed by Jialin Qiao and Lei Rui.
In summary, a Storage Group is a table, and there are two types of column
mappings:
1. the columns
Hi community,
as I finished some private projects, I feel like I have some time and new
energy to spend more efforts to edgent.
I have several ideas on how we can kick off the project again and would like to
share / discuss them with you guys.
* First, I suggest that we add adapters
Hi,
> So I wanted to create a confluence page for the design documentation on [1].
> But it seems that I’m missing the permissions.
What’s your user name?
Thanks,
Justin
Hi community,
as I finished some private projects, I feel like I have some time and new
energy to spend more efforts to edgent.
I have several ideas on how we can kick off the project again and would like to
share / discuss them with you guys.
* First, I suggest that we add adapters
Hi all,
I wanted to start with a design page for the Calcite integration on the
confluence.
Parallel to the technical things we should have a discussion how we map the
iotdb notions and elements to standard sql (e.g. what is a table? A device? A
node in the tree? …).
So I wanted to create a
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