Re:Courses /Trainings for Open Source Projects

2020-07-09 Thread Dawei Liu
Hi, This website opens very, very slowly on my computer. Can others open it? Best ——— Dawei Liu On 07/5/2020 20:04,Julian Feinauer wrote: Hi folks, as some may have noticed on other lists Chris, myself and some others are starting something together (and also with other Partners from the

Change the base_dir to system_dir

2020-07-09 Thread zyx
Hi, I submit this pr [1] to fix issue [2]. The naming of base_dir is likely to mislead users that it is the parent folder of data_dirs and wal_dirs. However, they are independent. The base_dir is just responsible for the system data folder (schema, version files...), so I changed the

[BUILD-FAILURE]: Job 'IoTDB-Pipeline/master [master] [416]'

2020-07-09 Thread Apache Jenkins Server
BUILD-FAILURE: Job 'IoTDB-Pipeline/master [master] [416]': Check console output at "https://builds.apache.org/job/IoTDB-Pipeline/job/master/416/;>IoTDB-Pipeline/master [master] [416]"

Re: [Experiment sharing] How chunk size(number of points) impact the query performance

2020-07-09 Thread Jialin Qiao
Hi, I perform it directly. Some supplements: - The version I used is the 0.11.0-SNAPSHOT in master branch. The specific commit does not matter because we do not modify the query engine much after 0.10.0. - Each time I execute the query, I restart the IoTDB to avoid the influence of cache in

Re: [Experiment sharing] How chunk size(number of points) impact the query performance

2020-07-09 Thread Julian Feinauer
Hey, very interesting experiment. Did you use something like JMH fort he Benchmark or did you perform it directly? Julian Am 09.07.20, 09:29 schrieb "孙泽嵩" : Hi Jialin, Great experiment! Thanks for your sharing. Looking forward to the function of hot compaction. Best,

Re: [Experiment sharing] How chunk size(number of points) impact the query performance

2020-07-09 Thread 孙泽嵩
Hi Jialin, Great experiment! Thanks for your sharing. Looking forward to the function of hot compaction. Best, --- Zesong Sun School of Software, Tsinghua University 孙泽嵩 清华大学 软件学院 > 2020年7月8日 16:39,Jialin Qiao 写道: > > Hi, > > > I'd like to share with you

Re: Fetch query result iteratively to avoid OOM

2020-07-09 Thread Julian Feinauer
Hi Jialin, this is a very good point, indeed. I remember in Calcite there was the Linq4j Module which was based on an extension of an "Iterable / Iterator" which was basically Lazy Loading / Computation. This object was assembled throughout the query and finally given to the Servers handler

Fetch query result iteratively to avoid OOM

2020-07-09 Thread Jialin Qiao
Hi, Currently, Haihang and Yuan Tian added an improvement to fetch the results of show timeseries iteratively to avoid OOM [1]. For data queries, we use the QueryDataSet which provides the hasNext & next iterator. Then the client could fetch result by fetchSize. However, for most metadata