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 Solutions Delivery Consultant 321 West 44th St | Suite 501 | New York, NY 10036 +1 212.871.8355 office | +1 646.752.4933 mobile CAST, Leader in Software Analysis and Measurement Achieve Insight. Deliver Excellence. Join the discussion http://blog.castsoftware.com/ LinkedIn<http://www.linkedin.com/companies/162909> | Twitter<http://twitter.com/onquality> | Facebook<http://www.facebook.com/pages/CAST/105668942817177>
