What memory setting did you increase? Have you tried 6 or 8GB?
How much memory is allocated to Drill Heap and Direct memory for the embedded
Drillbit?
Also did you check the larger document doesn’t have any schema changes or
corruption?
--Andries
On 11/2/17, 12:31 PM, "Yun Liu" <y....@castsoftware.com> wrote:
Hi Kunal and Andries,
Thanks for your reply. We need json in this case because Drill only
supports up to 65536 columns in a csv file. I also tried increasing the memory
size to 4GB but I am still experiencing same issues. Drill is installed in
Embedded Mode.
Thanks,
Yun
-----Original Message-----
From: Kunal Khatua [mailto:kkha...@mapr.com]
Sent: Thursday, November 2, 2017 2:01 PM
To: user@drill.apache.org
Subject: RE: Drill Capacity
Hi Yun
Andries solution should address your problem. However, do understand that,
unlike CSV files, a JSON file cannot be processed in parallel, because there is
no clear record delimiter (CSV data usually has a new-line character to
indicate the end of a record). So, the larger a file gets, the more work a
single minor fragment has to do in processing it, including maintaining
internal data-structures to represent the complex JSON document.
The preferable way would be to create more JSON files so that the files can
be processed in parallel.
Hope that helps.
~ Kunal
-----Original Message-----
From: Andries Engelbrecht [mailto:aengelbre...@mapr.com]
Sent: Thursday, November 02, 2017 10:26 AM
To: user@drill.apache.org
Subject: Re: Drill Capacity
How much memory is allocated to the Drill environment?
Embedded or in a cluster?
I don’t think there is a particular limit, but a single JSON file will be
read by a single minor fragment, in general it is better to match the
number/size of files to the Drill environment.
In the short term try to bump up planner.memory.max_query_memory_per_node
in the options and see if that works for you.
--Andries
On 11/2/17, 7:46 AM, "Yun Liu" <y....@castsoftware.com> wrote:
Hi,
I've been using Apache Drill actively and just wondering what is the
capacity of Drill? I have a json file which is 390MB and it keeps throwing me
an DATA_READ ERROR. I have another json file with exact same format but only
150MB and it's processing fine. When I did a *select* on the large json, it
returns successfully for some of the fields. None of these errors really apply
to me. So I am trying to understand the capacity of the json files Drill
supports up to. Or if there's something else I missed.
Thanks,
Yun Liu
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