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From Chanh Le <giaosu...@gmail.com>
Subject Re: Why so many parquet file part when I store data in Alluxio or File?
Date Mon, 04 Jul 2016 03:02:19 GMT
Hi Gene,
Could you give some suggestions on that?



> On Jul 1, 2016, at 5:31 PM, Ted Yu <yuzhihong@gmail.com> wrote:
> 
> The comment from zhangxiongfei was from a year ago.
> 
> Maybe something changed since them ?
> 
> On Fri, Jul 1, 2016 at 12:07 AM, Chanh Le <giaosudau@gmail.com <mailto:giaosudau@gmail.com>>
wrote:
> Hi Ted,
> I set sc.hadoopConfiguration.setBoolean("fs.hdfs.impl.disable.cache", true)
> sc.hadoopConfiguration.setLong("fs.local.block.size", 268435456)
> but It seems not working.
> 
> <Screen_Shot_2016-07-01_at_2_06_27_PM.png>
> 
> 
>> On Jul 1, 2016, at 11:38 AM, Ted Yu <yuzhihong@gmail.com <mailto:yuzhihong@gmail.com>>
wrote:
>> 
>> Looking under Alluxio source, it seems only "fs.hdfs.impl.disable.cache" is in use.
>> 
>> FYI
>> 
>> On Thu, Jun 30, 2016 at 9:30 PM, Deepak Sharma <deepakmca05@gmail.com <mailto:deepakmca05@gmail.com>>
wrote:
>> Ok.
>> I came across this issue.
>> Not sure if you already assessed this:
>> https://issues.apache.org/jira/plugins/servlet/mobile#issue/SPARK-6921 <https://issues.apache.org/jira/plugins/servlet/mobile#issue/SPARK-6921>
>> The workaround mentioned may work for you .
>> 
>> Thanks
>> Deepak
>> 
>> On 1 Jul 2016 9:34 am, "Chanh Le" <giaosudau@gmail.com <mailto:giaosudau@gmail.com>>
wrote:
>> Hi Deepark,
>> Thank for replying. The way to write into alluxio is 
>> df.write.mode(SaveMode.Append).partitionBy("network_id", "time").parquet("alluxio://master1:19999/FACT_ADMIN_HOURLY
<>”)
>> 
>> 
>> I partition by 2 columns and store. I just want when I write it automatic write a
size properly for what I already set in Alluxio 512MB per block.
>> 
>> 
>>> On Jul 1, 2016, at 11:01 AM, Deepak Sharma <deepakmca05@gmail.com <mailto:deepakmca05@gmail.com>>
wrote:
>>> 
>>> Before writing coalesing your rdd to 1 .
>>> It will create only 1 output file .
>>> Multiple part file happens as all your executors will be writing their partitions
to separate part files.
>>> 
>>> Thanks
>>> Deepak
>>> 
>>> On 1 Jul 2016 8:01 am, "Chanh Le" <giaosudau@gmail.com <mailto:giaosudau@gmail.com>>
wrote:
>>> Hi everyone,
>>> I am using Alluxio for storage. But I am little bit confuse why I am do set block
size of alluxio is 512MB and my file part only few KB and too many part.
>>> Is that normal? Because I want to read it fast? Is that many part effect the
read operation?
>>> How to set the size of file part?
>>> 
>>> Thanks.
>>> Chanh
>>> 
>>> 
>>> 
>>>  
>>> 
>>> <Screen_Shot_2016-07-01_at_9_24_55_AM.png>
>> 
>> 
> 
> 


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