Updated the scheduling
https://cwiki.apache.org/confluence/display/DORIS/DSIP-018%3A+Support+Merge-On-Write+implementation+for+UNIQUE+KEY+data+model
Best
Chen Zhang
在 2022年6月27日 +0800 11:59，Chen Zhang ，写道：
> Hi Devs, I've update the DISP last weekend, if you are interest on this
> feature, welcom
Hi Devs, I've update the DISP last weekend, if you are interest on this
feature, welcome to review and comment, thanks
https://cwiki.apache.org/confluence/display/DORIS/DSIP-018%3A+Support+Merge-On-Write+implementation+for+UNIQUE+KEY+data+model
Best
Chen Zhang
在 2022年6月24日 +0800 10:13，zhg yang ，写
@ Chen Zhang For the more important features, it is best to send a DISP
first to let everyone discuss the design
Thanks
Yang Zhengguo
Chen Zhang 于2022年6月23日周四 22:30写道：
> @Minghong We'll use a multi-version delete bitmap, only save delta for
> each version.
> For example, we have a rowset with
Done!
--
此致！Best Regards
陈明雨 Mingyu Chen
Email:
morning...@apache.org
在 2022-06-24 08:48:29，"Chen Zhang" 写道：
>@Mingyu, my username: zhannngchen. Thanks~
>
>Best
>Chen Zhang
>On Jun 24, 2022, 00:56 +0800, 陈明雨 , wrote:
>> Hi Zhang Chen:
>> I have created a DSIP-018 for this[1]. But you ne
@Mingyu, my username: zhannngchen. Thanks~
Best
Chen Zhang
On Jun 24, 2022, 00:56 +0800, 陈明雨 , wrote:
> Hi Zhang Chen:
> I have created a DSIP-018 for this[1]. But you need to create an account and
> tell me your username.
>
>
> [1]
> https://cwiki.apache.org/confluence/display/DORIS/DSIP-018%3A
Hi Zhang Chen:
I have created a DSIP-018 for this[1]. But you need to create an account and
tell me your username.
[1]
https://cwiki.apache.org/confluence/display/DORIS/DSIP-018%3A+Support+Merge-On-Write+implementation+for+UNIQUE+KEY+data+model
--
此致！Best Regards
陈明雨 Mingyu Chen
Email:
mo
@Minghong We'll use a multi-version delete bitmap, only save delta for each
version.
For example, we have a rowset with version [0-98], transaction 99 updated some
row in that rowset, and so does transaction 100 and 101, there would be 3
delete bitmaps on that rowset, corresponding to rows updat
Hi Chen Zhang
one question about "and a delete bitmap (marks some rowid as deleted)”：
how to handle transaction information by a bitmap?
for example, transaction_100 delete a row, but this still visible to
transaction_99, but not visible to trasanction_101. How to handle this case?
Br/Minghong
Hi Chen Zhang,
I am very interested in this topic, and want to participate in the development.
在 2022/6/23 下午2:44，“Chen Zhang” 写入:
Hi devs,
Unique-Key data model is widely used in scenarios like Flink-CDC, user
profile(用户画像), E-commerce orders, but the query performance for current
Hi devs,
Unique-Key data model is widely used in scenarios like Flink-CDC, user
profile(用户画像), E-commerce orders, but the query performance for current
Merge-On-Read implementation is not good, due to the following reasons:
1. Doris can't determine whether one row in a segment file is latest o
10 matches
Mail list logo
