There appears to be seem significant issues with 4D and large : Text, Blobs, and Files.
After playing for way too long, I have found the following issues/limitations when working with large files: - Receive Packet : -- into Text there appears to be limit of around 169megs after which import fails. -- into Blob there is a limit which appears to be available memory specific, it is larger then text, but still far less then the size limit for either text or blob. I was able to get, once, 1.6gb imported, but mostly failure of receive packet into blob is around 750-800megs. in either instance, 4D does, mostly, generate an error -108 (not enough memory) but not always. often enough 4D just fails the receive packet, OK = 0, blob or text is empty, and no error is generated. Additionally, Blob to Text has issues. I have not worked out the point where the limit is, but when the blob is somewhere between 150megs, and 500megs the command chokes. 4D throws an error (-1 -- most probably a resource issue) and does not convert the blob contents to text. These limits maybe imposed by the 32 bit architecture of v13, I have not tried on on a 64 bit version of 4D. All of this makes trying to manage very large text files difficult. On Tue, 26 Sep 2017 09:34:25 +0000, Keisuke Miyako via 4D_Tech wrote: > you should use BLOB instead of TEXT with RECEIVE PACKET, with a stop > char or max size, which you like. > just remember to clear the BLOB every iteration and save as you go. > > don't use arrays (defeats the purpose of chunking), > don't use text (bloats the size and adds overhead for decoding). > >> 2017/09/26 6:30、Chip Scheide via 4D_Tech <[email protected]> のメール： >> Is there a limit to how much can be read in one 'chunk' via Receive Packet? > > > > > ********************************************************************** > 4D Internet Users Group (4D iNUG) > FAQ: http://lists.4d.com/faqnug.html > Archive: http://lists.4d.com/archives.html > Options: http://lists.4d.com/mailman/options/4d_tech > Unsub: mailto:[email protected] > ********************************************************************** --------------- Gas is for washing parts Alcohol is for drinkin' Nitromethane is for racing ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
