Re: [VOTE] Enrich information of project committers in IOTDB website

[jincheng sun]

Hi Xiangdong,

Usually we can follow the existing process in [1].  But it's great if we
can have a clearly description regarding some specific things, such as:

- Who is permitted to vote, and which kind of vote is binding?
i.e., Sometimes only PMC members vote for Building, and sometimes Committee
votes for Building.
- Which kind of issues should be bring up the discussion? e.g., we do not
need bring up the discussion for typo issue, but for the interface changes
we should bring up the discussion (may be with  a design document)
- What is the template for discussion and voting, and what elements should
be included? e.g., Voting duration must be included in the voting
template(such as: The vote will be open for at least 72 hours. It is
adopted by a simple majority with a minimum of three positive votes. )

So, I think it's better to have a guideline for our contributors in our
website. What do you think? :)


Best,
Jincheng

[1] https://www.apache.org/foundation/voting.html


Xiangdong Huang  于2019年12月21日周六 下午1:19写道：

> Hi,
>
> @Zesong I think it is your duty to end this vote and summarize the result.
>
> @Jincheng, Do we really need a discussion about that? Maybe all votes
> processes are the same in Apache way?. But an instruction document is good
> for fresh users.
>
> Best,
>
>
>
> ---
> Xiangdong Huang
> School of Software, Tsinghua University
>
>  黄向东
> 清华大学 软件学院
>
>
> jincheng sun  于2019年12月21日周六 下午12:35写道：
>
> > Hi,
> >
> > Which kind of VOTE is binding?  And under what conditions can this poll
> be
> > ended？
> >
> > BTW: I haven't seen any documentation regarding how to bringup
> discussion,
> > how to finish a VOTE. If not, I suggest launching a discussion to improve
> > the gap in this area.
> >
> > Best,
> > Jincheng
> >
> > Best,
> > Jincheng
> > @sunjincheng121 
> >
> >
> > jincheng sun  于2019年12月17日周二 下午6:23写道：
> >
> > > +1, and I have left a few comments in the PR.
> > >
> > > Best,
> > > Jincheng
> > >
> > > Twitter: https://twitter.com/sunjincheng121
> > >
> > >
> > > Jack Tsai  于2019年12月17日周二 下午3:56写道：
> > >
> > >> Hi,
> > >> +1 for this idea.
> > >>
> > >> Best regards,
> > >> Jack Tsai
> > >>
> > >> 取得 iOS 版 Outlook
> > >> 
> > >> 寄件者: Jialin Qiao 
> > >> 寄件日期: Tuesday, December 17, 2019 7:52:33 AM
> > >> 收件者: dev@iotdb.apache.org 
> > >> 主旨: Re: [VOTE] Enrich information of project committers in IOTDB
> website
> > >>
> > >> Hi,
> > >>
> > >> +1,  we could create a confluence page about this if passed.
> > >>
> > >> Thanks,
> > >> Jialin Qiao
> > >>
> > >> Xiangdong Huang  于2019年12月17日周二 下午3:42写道：
> > >>
> > >> > Hi,
> > >> >
> > >> > +1 for the idea.
> > >> >
> > >> > Best,
> > >> > ---
> > >> > Xiangdong Huang
> > >> > School of Software, Tsinghua University
> > >> >
> > >> >  黄向东
> > >> > 清华大学 软件学院
> > >> >
> > >> >
> > >> > 孙泽嵩  于2019年12月17日周二 下午3:29写道：
> > >> >
> > >> > > Hi all,
> > >> > >
> > >> > > Thanks to @Jincheng, we intend to enrich information of project
> > >> > committers
> > >> > > in website. (The last VOTE e-mail was actually in a new thread…
> but
> > >> > somehow
> > >> > > showed together with the DISCUSS thread in some e-mail clients,
> so I
> > >> > change
> > >> > > the theme a little this time ...)
> > >> > >
> > >> > > I have opened a PR [1] in our website repository, so if this VOTE
> > pass
> > >> > and
> > >> > > the PR is merged, every committer and contributor can open PR
> > >> themselves
> > >> > to
> > >> > > maintain their own information. Besides, we also add two lists for
> > >> those
> > >> > > contributors who have submitted PR(s) and propose issue(s) for
> IoTDB
> > >> to
> > >> > > encourage more and more people to join us.
> > >> > >
> > >> > > I’d like to briefly introduce how to maintain your information:
> > >> > >
> > >> > > 1. Search your name in 'src/views/Contributor.vue' , and update
> the
> > >> > > information (including avatar, name, role, organization, apache
> id,
> > >> and
> > >> > > starting date).
> > >> > >
> > >> > > 2. If your name hasn't existed in the page, you can just add your
> > >> > > information in the list accordingly: ‘conList' for committers,
> > >> > > ‘conWithPRList' for contributors who have submitted PR(s), and
> > >> > > ‘conWithIssueList' for contributors who have proposed issue(s).
> > >> > >
> > >> > > 3. As for avatar, you can either upload a picture (better to limit
> > the
> > >> > > size <150KB) by adding one in '/assets/img/contributor-avatar',
> then
> > >> you
> > >> > > only need to use the file name in the information; Or, you can
> use a
> > >> > photo
> > >> > > link. (You can see the example in PR description)
> > >> > >
> > >> > >
> > >> > > A minimum of 3 binding +1 votes and more binding +1 than binding
> -1
> > >> > > are required to pass.
> > >> > >
> > >> > > [ ]  +1 accept
> > >> > > [ ]  -1 reject (explanation required)
> > >> > 

[jira] [Created] (IOTDB-388) Need to disable sonar and coveralls for non-committers

[Xiangdong Huang (Jira)]

Xiangdong Huang created IOTDB-388:
-

 Summary: Need to disable sonar and coveralls for non-committers
 Key: IOTDB-388
 URL: https://issues.apache.org/jira/browse/IOTDB-388
 Project: Apache IoTDB
  Issue Type: Bug
Reporter: Xiangdong Huang


As travis will upload results to sonar and coveralls but non-committers have no 
permission, the related PR CI will fail.

 

Therefore, we can disable the two CI stage for those who have no write 
permission of Apache IoTDB repo. That is, these users can just fork the repo 
and then submit pr.

 

If it does not work, we can constrain the type = pull_request. 

 



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[jira] [Created] (IOTDB-387) merge dev_new_merge_strategy into master

[Jira]

张凌哲 created IOTDB-387:
-

 Summary: merge dev_new_merge_strategy into master
 Key: IOTDB-387
 URL: https://issues.apache.org/jira/browse/IOTDB-387
 Project: Apache IoTDB
  Issue Type: Task
Reporter: 张凌哲


dev_new_merge_strategy was created one month ago, now to merge it into master.



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[BUILD-FAILURE]: Job 'IoTDB Website [null] [90]'

[Apache Jenkins Server]

BUILD-FAILURE: Job 'IoTDB Website [null] [90]':

Check console output at "https://builds.apache.org/job/IoTDB%20Website/90/;>IoTDB Website [null] 
[90]"

[BUILD-STABLE]: Job 'IoTDB Website [null] [89]'

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BUILD-STABLE: Job 'IoTDB Website [null] [89]':

Is back to normal.

Re: [jira] [Created] (IOTDB-386) Vectorize the raw data query process

[Jialin Qiao]

Hi,

With the help of Yuantian, Zesong Sun and Lei Rui, the refactor of query
process takes a step forward: vectorizing the raw data query.
Indeed there is a lot of work to do, I suggest to merge this PR to master
first because we change a lot. After merging, other optimization could be
split into small PRs.

The PR is https://github.com/apache/incubator-iotdb/pull/652 , welcome to
review.

Best,
Jialin Qiao

Jialin Qiao (Jira)  于2019年12月24日周二 上午9:24写道：

> Jialin Qiao created IOTDB-386:
> -
>
>  Summary: Vectorize the raw data query process
>  Key: IOTDB-386
>  URL: https://issues.apache.org/jira/browse/IOTDB-386
>  Project: Apache IoTDB
>   Issue Type: Improvement
> Reporter: Jialin Qiao
>
>
> Currently, the readers in IoTDB most follows a tuple-at-a-time iterator
> mode. It's better to replace it with column-at-a-time.
>
> The related academic research is "C-Store: A Column-oriented DBMS".
>
> !image-2019-12-24-09-21-19-827.png|width=326,height=194!
>
>
>
>
>
> --
> This message was sent by Atlassian Jira
> (v8.3.4#803005)
>


-- 
—
Jialin Qiao
School of Software, Tsinghua University

乔嘉林
清华大学 软件学院

[jira] [Created] (IOTDB-386) Vectorize the raw data query process

[Jialin Qiao (Jira)]

Jialin Qiao created IOTDB-386:
-

 Summary: Vectorize the raw data query process
 Key: IOTDB-386
 URL: https://issues.apache.org/jira/browse/IOTDB-386
 Project: Apache IoTDB
  Issue Type: Improvement
Reporter: Jialin Qiao


Currently, the readers in IoTDB most follows a tuple-at-a-time iterator mode. 
It's better to replace it with column-at-a-time.

The related academic research is "C-Store: A Column-oriented DBMS".

!image-2019-12-24-09-21-19-827.png|width=326,height=194!

 



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Re: [DISCUSS] Using align `left` take over `justify` text-align style in IoTDb website

[jincheng sun]

Hi Zesong,

Don't worry, I believe you will do it pretty great next time! :)

BTW: thank for update the PR, LGTM. :)

Best,
Jincheng


孙泽嵩  于2019年12月23日周一 下午10:16写道：

> Hi @sunjincheng121 ,
>
> Sorry for somehow ignoring the "latest news" part…
> And many thanks for the suggestions! I will notice the PR and commit
> format in the future : )
>
>
> Best,
> ---
> Zesong Sun
> School of Software, Tsinghua University
>
> 孙泽嵩
> 清华大学 软件学院
>
> > 2019年12月23日 22:11，jincheng sun  写道：
> >
> > Thanks for your conformation Jack，Xiangdong！
> >
> > Thanks for the PR Zesong！
> >
> > I manually established the JIRA(IOTDB-384) and PR(54) links, and left the
> > following 3 suggestions in the PR：
> >
> >-  It's better to contain JIRA. number in the PR title. such as:
> > [IOTDB-384] ix main feature text style in homepage. Then the reviewer can
> > know the JIRA of the PR easily.
> >- The commit message should contain the JIRA. number such as :
> > [IOTDB-384] ix main feature text style in homepage.Then the JIRA and the
> PR
> > can make the relation automatically
> >-  It's better to fix the problem of "Latest News " in the PR(54).
> >
> > What do you think ?
> > Best,
> > Jincheng
> >
> >
> > 孙泽嵩  于2019年12月23日周一 下午8:51写道：
> >
> >> Sure, if you all think it will be better : ) Here is PR [1] and result
> >>
> >> [1] https://github.com/apache/incubator-iotdb-website/pull/54 <
> >> https://github.com/apache/incubator-iotdb-website/pull/54>
> >>
> >>
> >>
> >> Best,
> >> ---
> >> Zesong Sun
> >> School of Software, Tsinghua University
> >>
> >> 孙泽嵩
> >> 清华大学 软件学院
> >>
> >>> 2019年12月23日 20:40，Xiangdong Huang  写道：
> >>>
> >>> Hi @Zesong, do you have time to fix the style?
> >>>
> >>> Best,
> >>> ---
> >>> Xiangdong Huang
> >>> School of Software, Tsinghua University
> >>>
> >>> 黄向东
> >>> 清华大学 软件学院
> >>>
> >>>
> >>> Jack Tsai  于2019年12月23日周一 下午5:30写道：
> >>>
>  Hi,
> 
>  Agree. Looks better while applying “align left”.
> 
>  Best regards,
>  Jack Tsai
> 
>  取得 iOS 版 Outlook
>  
>  寄件者: jincheng sun 
>  寄件日期: Monday, December 23, 2019 9:18:17 AM
>  收件者: dev@iotdb.apache.org 
>  主旨: [DISCUSS] Using align `left` take over `justify` text-align style
> in
>  IoTDb website
> 
>  Hi folks,
> 
>  When I reading home of the IoTDB website [1], I feel that the display
> >> style
>  of "Main Features" is very uncomfortable, and the text spacing is
>  different, just like a bug, but it is actually a problem of the
> display
>  style(text align: justify).
> 
>  I propose using align `left` take over `justify` text-align style in
> >> IoTDB
>  website.
> 
>  The modified display effect comparison can be viewed in [2] or [3]
> 
>  BTW. The area of "Latest News " has the same problem, i.e., the style
> of
>  "list-unstyled" should be replace by other style.
> 
>  What do you think? Welcome any feedback :)
> 
>  Best,
>  Jincheng
> 
>  [1] https://iotdb.apache.org
>  [2]
> 
> 
> >>
> https://issues.apache.org/jira/secure/attachment/12989376/image-2019-12-23-16-49-25-077.png
>  [3] https://issues.apache.org/jira/browse/IOTDB-384
> 
> >>
> >>
>
>

Re: [DISCUSS] Using align `left` take over `justify` text-align style in IoTDb website

[孙泽嵩]

Hi @sunjincheng121 , 

Sorry for somehow ignoring the "latest news" part… 
And many thanks for the suggestions! I will notice the PR and commit format in 
the future : )


Best,
---
Zesong Sun
School of Software, Tsinghua University

孙泽嵩
清华大学 软件学院

> 2019年12月23日 22:11，jincheng sun  写道：
> 
> Thanks for your conformation Jack，Xiangdong！
> 
> Thanks for the PR Zesong！
> 
> I manually established the JIRA(IOTDB-384) and PR(54) links, and left the
> following 3 suggestions in the PR：
> 
>-  It's better to contain JIRA. number in the PR title. such as:
> [IOTDB-384] ix main feature text style in homepage. Then the reviewer can
> know the JIRA of the PR easily.
>- The commit message should contain the JIRA. number such as :
> [IOTDB-384] ix main feature text style in homepage.Then the JIRA and the PR
> can make the relation automatically
>-  It's better to fix the problem of "Latest News " in the PR(54).
> 
> What do you think ?
> Best,
> Jincheng
> 
> 
> 孙泽嵩  于2019年12月23日周一 下午8:51写道：
> 
>> Sure, if you all think it will be better : ) Here is PR [1] and result
>> 
>> [1] https://github.com/apache/incubator-iotdb-website/pull/54 <
>> https://github.com/apache/incubator-iotdb-website/pull/54>
>> 
>> 
>> 
>> Best,
>> ---
>> Zesong Sun
>> School of Software, Tsinghua University
>> 
>> 孙泽嵩
>> 清华大学 软件学院
>> 
>>> 2019年12月23日 20:40，Xiangdong Huang  写道：
>>> 
>>> Hi @Zesong, do you have time to fix the style?
>>> 
>>> Best,
>>> ---
>>> Xiangdong Huang
>>> School of Software, Tsinghua University
>>> 
>>> 黄向东
>>> 清华大学 软件学院
>>> 
>>> 
>>> Jack Tsai  于2019年12月23日周一 下午5:30写道：
>>> 
 Hi,
 
 Agree. Looks better while applying “align left”.
 
 Best regards,
 Jack Tsai
 
 取得 iOS 版 Outlook
 
 寄件者: jincheng sun 
 寄件日期: Monday, December 23, 2019 9:18:17 AM
 收件者: dev@iotdb.apache.org 
 主旨: [DISCUSS] Using align `left` take over `justify` text-align style in
 IoTDb website
 
 Hi folks,
 
 When I reading home of the IoTDB website [1], I feel that the display
>> style
 of "Main Features" is very uncomfortable, and the text spacing is
 different, just like a bug, but it is actually a problem of the display
 style(text align: justify).
 
 I propose using align `left` take over `justify` text-align style in
>> IoTDB
 website.
 
 The modified display effect comparison can be viewed in [2] or [3]
 
 BTW. The area of "Latest News " has the same problem, i.e., the style of
 "list-unstyled" should be replace by other style.
 
 What do you think? Welcome any feedback :)
 
 Best,
 Jincheng
 
 [1] https://iotdb.apache.org
 [2]
 
 
>> https://issues.apache.org/jira/secure/attachment/12989376/image-2019-12-23-16-49-25-077.png
 [3] https://issues.apache.org/jira/browse/IOTDB-384
 
>> 
>> 

Re: [DISCUSS] Using align `left` take over `justify` text-align style in IoTDb website

[jincheng sun]

Thanks for your conformation Jack，Xiangdong！

Thanks for the PR Zesong！

I manually established the JIRA(IOTDB-384) and PR(54) links, and left the
following 3 suggestions in the PR：

-  It's better to contain JIRA. number in the PR title. such as:
[IOTDB-384] ix main feature text style in homepage. Then the reviewer can
know the JIRA of the PR easily.
- The commit message should contain the JIRA. number such as :
[IOTDB-384] ix main feature text style in homepage.Then the JIRA and the PR
can make the relation automatically
-  It's better to fix the problem of "Latest News " in the PR(54).

What do you think ?
Best,
Jincheng


孙泽嵩  于2019年12月23日周一 下午8:51写道：

> Sure, if you all think it will be better : ) Here is PR [1] and result
>
> [1] https://github.com/apache/incubator-iotdb-website/pull/54 <
> https://github.com/apache/incubator-iotdb-website/pull/54>
>
>
>
> Best,
> ---
> Zesong Sun
> School of Software, Tsinghua University
>
> 孙泽嵩
> 清华大学 软件学院
>
> > 2019年12月23日 20:40，Xiangdong Huang  写道：
> >
> > Hi @Zesong, do you have time to fix the style?
> >
> > Best,
> > ---
> > Xiangdong Huang
> > School of Software, Tsinghua University
> >
> > 黄向东
> > 清华大学 软件学院
> >
> >
> > Jack Tsai  于2019年12月23日周一 下午5:30写道：
> >
> >> Hi,
> >>
> >> Agree. Looks better while applying “align left”.
> >>
> >> Best regards,
> >> Jack Tsai
> >>
> >> 取得 iOS 版 Outlook
> >> 
> >> 寄件者: jincheng sun 
> >> 寄件日期: Monday, December 23, 2019 9:18:17 AM
> >> 收件者: dev@iotdb.apache.org 
> >> 主旨: [DISCUSS] Using align `left` take over `justify` text-align style in
> >> IoTDb website
> >>
> >> Hi folks,
> >>
> >> When I reading home of the IoTDB website [1], I feel that the display
> style
> >> of "Main Features" is very uncomfortable, and the text spacing is
> >> different, just like a bug, but it is actually a problem of the display
> >> style(text align: justify).
> >>
> >> I propose using align `left` take over `justify` text-align style in
> IoTDB
> >> website.
> >>
> >> The modified display effect comparison can be viewed in [2] or [3]
> >>
> >> BTW. The area of "Latest News " has the same problem, i.e., the style of
> >> "list-unstyled" should be replace by other style.
> >>
> >> What do you think? Welcome any feedback :)
> >>
> >> Best,
> >> Jincheng
> >>
> >> [1] https://iotdb.apache.org
> >> [2]
> >>
> >>
> https://issues.apache.org/jira/secure/attachment/12989376/image-2019-12-23-16-49-25-077.png
> >> [3] https://issues.apache.org/jira/browse/IOTDB-384
> >>
>
>

Re: [DISCUSS] Using align `left` take over `justify` text-align style in IoTDb website

[孙泽嵩]

Sure, if you all think it will be better : ) Here is PR [1] and result

[1] https://github.com/apache/incubator-iotdb-website/pull/54 




Best,
---
Zesong Sun
School of Software, Tsinghua University

孙泽嵩
清华大学 软件学院

> 2019年12月23日 20:40，Xiangdong Huang  写道：
> 
> Hi @Zesong, do you have time to fix the style?
> 
> Best,
> ---
> Xiangdong Huang
> School of Software, Tsinghua University
> 
> 黄向东
> 清华大学 软件学院
> 
> 
> Jack Tsai  于2019年12月23日周一 下午5:30写道：
> 
>> Hi,
>> 
>> Agree. Looks better while applying “align left”.
>> 
>> Best regards,
>> Jack Tsai
>> 
>> 取得 iOS 版 Outlook
>> 
>> 寄件者: jincheng sun 
>> 寄件日期: Monday, December 23, 2019 9:18:17 AM
>> 收件者: dev@iotdb.apache.org 
>> 主旨: [DISCUSS] Using align `left` take over `justify` text-align style in
>> IoTDb website
>> 
>> Hi folks,
>> 
>> When I reading home of the IoTDB website [1], I feel that the display style
>> of "Main Features" is very uncomfortable, and the text spacing is
>> different, just like a bug, but it is actually a problem of the display
>> style(text align: justify).
>> 
>> I propose using align `left` take over `justify` text-align style in IoTDB
>> website.
>> 
>> The modified display effect comparison can be viewed in [2] or [3]
>> 
>> BTW. The area of "Latest News " has the same problem, i.e., the style of
>> "list-unstyled" should be replace by other style.
>> 
>> What do you think? Welcome any feedback :)
>> 
>> Best,
>> Jincheng
>> 
>> [1] https://iotdb.apache.org
>> [2]
>> 
>> https://issues.apache.org/jira/secure/attachment/12989376/image-2019-12-23-16-49-25-077.png
>> [3] https://issues.apache.org/jira/browse/IOTDB-384
>> 

Re: [DISCUSS] Using align `left` take over `justify` text-align style in IoTDb website

[Xiangdong Huang]

Hi @Zesong, do you have time to fix the style?

Best,
---
Xiangdong Huang
School of Software, Tsinghua University

 黄向东
清华大学 软件学院


Jack Tsai  于2019年12月23日周一 下午5:30写道：

> Hi,
>
> Agree. Looks better while applying “align left”.
>
> Best regards,
> Jack Tsai
>
> 取得 iOS 版 Outlook
> 
> 寄件者: jincheng sun 
> 寄件日期: Monday, December 23, 2019 9:18:17 AM
> 收件者: dev@iotdb.apache.org 
> 主旨: [DISCUSS] Using align `left` take over `justify` text-align style in
> IoTDb website
>
> Hi folks,
>
> When I reading home of the IoTDB website [1], I feel that the display style
> of "Main Features" is very uncomfortable, and the text spacing is
> different, just like a bug, but it is actually a problem of the display
> style(text align: justify).
>
> I propose using align `left` take over `justify` text-align style in IoTDB
> website.
>
> The modified display effect comparison can be viewed in [2] or [3]
>
> BTW. The area of "Latest News " has the same problem, i.e., the style of
> "list-unstyled" should be replace by other style.
>
> What do you think? Welcome any feedback :)
>
> Best,
> Jincheng
>
> [1] https://iotdb.apache.org
> [2]
>
> https://issues.apache.org/jira/secure/attachment/12989376/image-2019-12-23-16-49-25-077.png
> [3] https://issues.apache.org/jira/browse/IOTDB-384
>

Re: [DISCUSS] Using align `left` take over `justify` text-align style in IoTDb website

[Jack Tsai]

Hi,

Agree. Looks better while applying “align left”.

Best regards,
Jack Tsai

取得 iOS 版 Outlook

寄件者: jincheng sun 
寄件日期: Monday, December 23, 2019 9:18:17 AM
收件者: dev@iotdb.apache.org 
主旨: [DISCUSS] Using align `left` take over `justify` text-align style in IoTDb 
website

Hi folks,

When I reading home of the IoTDB website [1], I feel that the display style
of "Main Features" is very uncomfortable, and the text spacing is
different, just like a bug, but it is actually a problem of the display
style(text align: justify).

I propose using align `left` take over `justify` text-align style in IoTDB
website.

The modified display effect comparison can be viewed in [2] or [3]

BTW. The area of "Latest News " has the same problem, i.e., the style of
"list-unstyled" should be replace by other style.

What do you think? Welcome any feedback :)

Best,
Jincheng

[1] https://iotdb.apache.org
[2]
https://issues.apache.org/jira/secure/attachment/12989376/image-2019-12-23-16-49-25-077.png
[3] https://issues.apache.org/jira/browse/IOTDB-384

[DISCUSS] Using align `left` take over `justify` text-align style in IoTDb website

[jincheng sun]

Hi folks,

When I reading home of the IoTDB website [1], I feel that the display style
of "Main Features" is very uncomfortable, and the text spacing is
different, just like a bug, but it is actually a problem of the display
style(text align: justify).

I propose using align `left` take over `justify` text-align style in IoTDB
website.

The modified display effect comparison can be viewed in [2] or [3]

BTW. The area of "Latest News " has the same problem, i.e., the style of
"list-unstyled" should be replace by other style.

What do you think? Welcome any feedback :)

Best,
Jincheng

[1] https://iotdb.apache.org
[2]
https://issues.apache.org/jira/secure/attachment/12989376/image-2019-12-23-16-49-25-077.png
[3] https://issues.apache.org/jira/browse/IOTDB-384

[jira] [Created] (IOTDB-385) Bloom Filter for time ranges

[Tian Jiang (Jira)]

Tian Jiang created IOTDB-385:


 Summary: Bloom Filter for time ranges
 Key: IOTDB-385
 URL: https://issues.apache.org/jira/browse/IOTDB-385
 Project: Apache IoTDB
  Issue Type: Improvement
Reporter: Tian Jiang


Situation:
Device1 generates data at 1 pm, 5 pm, and 8 pm, Device2 generates data at 1 pm, 
7 pm, and 8 pm. The query is "SELECT * FROM Device1, Device2 WHERE 13:00:00 < 
time < 18:00:00".

It is clear that Device2 is not satisfied, but we still need to query it since 
we currently only record startTime and endTIme for each device.

Solution:
For each device, assuming its startTime is t_s, then each timestamp _t_d >= 
t_s_ can be cast to a time range id using: _id = ceiling((t_d - t_s) / 
interval_length)_, where the interval_length is 1 hour for the above example. 
Having this id, a bloom filter (maybe other filters) can be built to tell if we 
truly have data satisfying the time condition.



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[jira] [Created] (IOTDB-384) Improve the style of Main Features in home page of website

[sunjincheng (Jira)]

sunjincheng created IOTDB-384:
-

 Summary: Improve the style of Main Features in home page of website
 Key: IOTDB-384
 URL: https://issues.apache.org/jira/browse/IOTDB-384
 Project: Apache IoTDB
  Issue Type: Bug
Reporter: sunjincheng
 Fix For: 0.9.1
 Attachments: image-2019-12-23-16-49-25-077.png

When I flow to the homepage of iotdb, I feel that the display style of main 
features is very uncomfortable, and the text spacing is different, just like a 
bug, but it is actually a problem of the display style. I changed the display 
effect from "text align: justify" to "text align: left" as follows:

!image-2019-12-23-16-49-25-077.png|width=822,height=259!



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