July 2020 - Dev - mailweb.openlookeng.io

openLooKeng PMC Biweekly Meeting
by Maowei (Morewell) 31 Jul '20

31 Jul '20

Just remind that our PMC Biweekly meeting will be held at 11 a.m. Beijing time today~ openLooKeng PMC Biweekly Meeting Agenda: * Remaining Issues of last meeting * Review the features of 930 vesion ――Michael * Introduce PMC's voting rules and methods for requirements and issues――Fred Li If you have other topics to discuss please leave a message here：https://etherpad.openlookeng.io/p/PMC-weeklymeeting Meeting Link: https://welink-meeting.zoom.us/j/663235710

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Remove he segment when all segments are deleted in a segment.
by Neeraj Unnikrishnan 30 Jul '20

30 Jul '20

Hello all, This proposal is to add an enhancement to the carbondata connector which marks the entire segment as marked for delete if all the elements in that segment is deleted. Please have a look and let me know if you have any suggestions or comments. Thanks & Regards, Neeraj U

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openLooKeng PMC Biweekly Meeting
by Maowei (Morewell) 29 Jul '20

29 Jul '20

openLooKeng PMC Biweekly Meeting Agenda: * Remaining Issues of last meeting * Review the features of 930 vesion ――Michael * …… If you have other topics to discuss please leave a message here：https://etherpad.openlookeng.io/p/PMC-weeklymeeting Meeting Link: https://welink-meeting.zoom.us/j/663235710

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Auto-Compaction
by K Sandeep 28 Jul '20

28 Jul '20

Hi all, Openlookeng not support auto compaction of tables. This becomes the limitation of openlookeng since other processing engines like spark provide the same. Find design doc in attachments. Kindly let me know if there are any comments/suggestions. Thanks, Sandeep.k

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Introduce the new work mechanism for approvers and reviewers
by zengchen 28 Jul '20

28 Jul '20

Hi all contributors: My name is zeng Chen and in charge of the service of robot for openlookeng. Recently, some contributors ask me to manage the approvers and reviewers as this one which is already running on k8s. I think it is a good suggestion. I send this email to clarify how does that mechanism run. 1. How to manage approvers The approvers are managed though the OWNERS files which may exist at each level directories. An approver in an OWNERS file can approve(by adding approved label) any file in that directory and its sub-directories, but he/she can't approve the files in the parent directory and any other sibling directories. 2. How to add label of 'approved' Please see the example to get the details. 3. How to manage reviewers Like the way to manage the approvers, reviewers are managed by OWNERS file too. A reviewer in an OWNERS file can approve(by adding lgtm label) any file in that directory and its sub-directories, but he/she can't approve the files in the parent directory and any other sibling directories. This is the big change to before. The old mechanism is that any one of collaborators which are managed by the git platform such as Gitee, Github can add lgtm label. The purpose is to let the reviewer work as approver and make each files at different level directories reviewed by different reviewers. 4. How to add label 'lgtm' The process is also like approve process, see the example of adding approved label above. In summary, both the approver and reviewer will be managed by OWNERS file and their working mechanisms are also the same. Appreciated for any suggestions. Thanks! Best Wishes zeng chen

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[doc]new requirement about guidance to tryme
by Liyongle (Fred) 22 Jul '20

22 Jul '20

Hi docs team, I created [1] for the guidance to tryme. Please find the details in the issue, and leave comments there or by replying this email. Thanks [1] https://gitee.com/openlookeng/hetu-core/issues/I1OQ2E Fred 李永乐

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MOM- openLooKeng PMC Biweekly Meeting at 11:00 a.m. Beijing time on July 17
by Maowei (Morewell) 21 Jul '20

21 Jul '20

Biweekly meeting at 11:00 a.m. Beijing time on July 17. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Attendees list: �� Ken Zhang �� Michael Li �� Raghunandan �� Xulifeng �� Xutianli �� Zhangwei �� Yangguo �� Maowei �� Zhangheng �� Fred Li �� Huangyan �� Ella Liu �� Lizheng �� Nitin �� Xudezhi �� Liaodenghong �� Rajeev rastogi �� Zhangjingfang Agenda: �� PMC Operation Mechanism �� Ken �� Vision of openLooKeng��Michael �� 930 openLooKeng version features ��Michael �� Proposed openLooKeng RoadMap ��Michael Minutes: �� PMC Operation Mechanism * Major responsibilities of PMC �� Final technical decision-making authority of the open source code base �� Open is mandatory, all communication must be visible �� Maintain roadmap and milestones �C Ken, Xulifeng �� Manage efficiency, quality and dependency of development process �C Raghu, Chenzeng �� Design reviews �C Michael �� Maintain approver/committer lists - All �� Community expansion �C Michael, Maowei, Raghu * Roadmap & Milestone-Ken��Xulifeng �� Vision - responsible for defining the system positioning and technology direction �� Roadmap and milestone for the second half year of 2020 �C 1st draft on July 30th �� Quarterly releases �C 1st official release: 930 �� Major semi-annual releases �� Release Manager �C Maowei * Software Development Life Cycle (SDLC) efficiency and quality��Raghu �� Responsible for the proper SDLC process to support quality development �� Design guidelines, Coding guidelines, UT �� Code inspection * Design reviews��Michael �� All design review requests to be raised on slack and dev(a)openlooken.io<mailto:dev@openlooken.io> for visibility �� Ensure in-depth discussion on all features �� All features must have design docs in our community �� Only approved feature with proper design guidelines can be merged * Community Expansion �C Ella (Canada), Maowei (China), Raghu (India) �� Community expansion events will be organized independently in each location while some materials will be shared �� Collect a list of all communities can help our expansion �� University Events �� Hackthon * PMC Activity Organizers �C Maowei/Ella �� Biweekly meetings �� Each meeting must have an agenda sent out ahead of time �� Meeting minutes must be sent to dev/user mailing list after finished �� Vision of openLooKeng * A stupid and simple in-situ engine to satisfy ad-hoc, batch, and streaming use cases * Plug and Play capability to improve performance * Global data access with simplified view via virtualization capability �� 930 openLooKeng version features * Further discussion is needed. In the next PMC meeting we should review items with priority for 930 release �� Proposed openLooKeng RoadMap * 2020 Q4��Focus on engine enhancements which includes core, performance and north-south enhancements. * 2021 Q1��Focus on Cross DC Performance Improvements��CBO enhancements and integration with hardware * 2021 Q2��Focus on Stream processing��Batch processing etc. Remaining Issues�� Collect a list of communities that can help us to expand��Fred Li / Maowei �� Where do we archive the design docs��Michael �� Find a tool that can be used for voting features on an open source platform��Fred Li Also you can see this MOM in here��https://etherpad.openlookeng.io/p/PMC-weeklymeeting +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

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Alter Table Support For Carbondata Connector
by Neeraj Unnikrishnan 20 Jul '20

20 Jul '20

Hi all, This proposal is for providing the support for Alter table operations on Carbondata connector. Attached is the design document for the same. Please let me know if you have any comments or suggestions.

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Table Pushdown Query Optimizer
by Siddharth Jaiswal 20 Jul '20

20 Jul '20

Hello All, We propose to include a query optimizer called Table Pushdown which is a rule based optimizer and acts upon queries which satisfy the constraint that the query has a subquery within it and the outer table must have a join with the inner table specified in the subquery on a unique/Primary Key column of the outer table. The following reference might be helpful- https://15721.courses.cs.cmu.edu/spring2017/papers/15-optimizer2/a8-sen.pdf The expectation is that by using this query optimizer, the run time can be reduced significantly for such queries thereby providing a significant advantage to the OpenLookeng engine's query processing capabilities. Attached is the design document. Please let me know if there are any review comments/suggestions. Thanks and Regards, Siddharth D Jaiswal

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Auto-Compaction for Carbondata Connector
by K Sandeep 20 Jul '20

20 Jul '20

Openlookeng integration with Carbondata not supporting auto compaction of tables. This becomes the limitation of openlookeng since other processing engine like spark provides the same. Find initial design doc in attachments. Kindly let me know if there are any comments/suggestions. Thanks, Sandeep.k

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