I have a big file (size > 4GB) loaded into an ffdf. The file has a table structure where each line respects the pattern "string, \t, num, \t, num". How can I sort the ffdf by the first column? After the sorting I have to print the ffdf to another file.
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I've try the function "ff::ffdfsort()" but the result is not fully ordered. It is composed by some ordered chunks. – Vincenzo Lanera Nov 06 '17 at 07:54