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Hi all... I have been trying to read a huge file of size around 7 GB. It looks like impossible task now.. The file looks like this: [ICODE] CITY0_084989053<tab>hdewhiuewf CITY1_000989090<tab>AACGTACGT CITY1_000989090<tab>GTACGATAH CITY2_643274032<tab>kdijadadsail CITY3_004498906<tab>Adjbsajdada CITY3_004498906<tab>Adjbsajdada ...... [/ICODE] I expect an output like below with only duplicate left side records. [ICODE] CITY1_000989090#1<tab>AACGTACGT …
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