Shaofeng SHI created KYLIN-3646:
---
Summary: Add instruction about rowkey sequence in "Advanced
setting" page
Key: KYLIN-3646
URL: https://issues.apache.org/jira/browse/KYLIN-3646
Project: Kylin
大家好，我按照http://kylin.apache.org/cn/docs/tutorial/cube_streaming.html这个教程一路配置下来，做好model和cube，到build的时候报错，如下：
生产的命令：
/opt/apache-kylin-2.5.0-bin-cdh57/bin/kylin.sh
org.apache.kylin.source.kafka.util.KafkaSampleProducer --topic kylin_demo_1
--broker 192.168.1.14:9092
还有部分截图
kylin.log的日志如下：
2018-10-
rongchuan.jin created KYLIN-3645:
Summary: Kylin does not clean table metadata when drop
project(Kafka Source)
Key: KYLIN-3645
URL: https://issues.apache.org/jira/browse/KYLIN-3645
Project: Kylin
Hi Shrikant,
Which Kylin version you used? By default, most of the filters will be pushed
down to coprocessor, you may grep "Total filtered row:" in your log to see how
many rows are filtered from coprocessor side.
If you want to change code to add some log there, you can add log at method:
C
Hi Team,
I tried debugging code to understand query execution (on Kylin v2.5 hbase
1.x) . As I understood query is formed and executed using Calcite APIs.
Could you please help me to get answer of below?
1. With my understanding default implementation of filter operation
(WHERE clause) is
Hi Sachin Aggarwal
When a lookup table is stored as snapshot, all columns in that table will be
taken as derived dimension by default during cube design.
Compare to normal dimension, derived dimension does not participate in cube
calculation directly. Instead, it is represented by its FK (Fore
I hope this may help you.
http://kylin.apache.org/docs/howto/howto_optimize_cubes.html
-- --
??: "Sachin Aggarwal";
: 2018??10??23??(??) 7:25
??: "user";"dev";
: join column derived vs normal
Hi Team,
while creating cube
Thank you Ma for response.
I didn't find any logs about applying filters in co-processors. Also I
don't see logs for logical/physical query plans in kylin.log. Am I missing
anything?
I would like to put logger statements in code and build specific module(s)
as required for tracing latencies -- wo
Hi Team,
while creating cube what are recommendations across join column between
fact and dimension.
should we mark it as derived or normal while selecting it from dimension
column.
what factors play a role in making this decision.
--
Thanks & Regards
Sachin Aggarwal
Thank you Ma for reply.
I have one of dimension of size 1.2GB with records ~ 13 millions and its a
UHC. I am trying with higher size of 'kylin.dictionary.forest-trie-max-mb'
to 2GB and marking 'kylin.dictionary.reusable' true as dimensions are
static.
Are there any other setting which could help
Hi Shrikant,
The log indicated that your query needs data from a snapshot lookup table(your
query columns should contain some derived columns defined in the cube), but the
snapshot is very large, so the query is very slow. You may check the snapshot
size in the lookup table's snapshot tab in K
Hubert STEFANI created KYLIN-3644:
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Summary: NumberFormatExcetion on null values when building cube
with Spark
Key: KYLIN-3644
URL: https://issues.apache.org/jira/browse/KYLIN-3644
Project: Kylin
Hi Team,
I am observing some queries are running for longer time and getting
failed. Here is exception in kylin logs for "BadQueryDetector".
Could someone please help me to understand about Bad Queries and
meaning of below stack trace :
2018-10-23 09:36:40,647 DEBUG [BadQueryDetec
You may post your query related log here, there should be some query log that
indicated whether the filter is push down or not, at least in the returned
response stats, there's some log show how many rows are filtered in the
coprocessor side.
At 2018-10-23 16:58:36, "Sachin Aggarwal" wrote:
>
Hi Team,
Could you please confirm if filtering of rows (WHERE clause) is done
in CoProcessor side?
Is there any APIs/logging to get physical plan of query? It will help
us in optimising the cube.
On Mon, Oct 22, 2018 at 8:58 PM Shrikant Bang
wrote:
> Thanks ShaoFeng for response. I
Hi Yi,
I have reproduced this issue using the sample dataset of kylin, and I've
opened a JIRA to track this issue.
https://issues.apache.org/jira/browse/KYLIN-3643
Best Regards,
May
--
Sent from: http://apache-kylin.74782.x6.nabble.com/
May Zhou created KYLIN-3643:
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Summary: Derived column from windowSpec not working in where
Key: KYLIN-3643
URL: https://issues.apache.org/jira/browse/KYLIN-3643
Project: Kylin
Issue Type: Bug
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