A data analytics system stores a plurality of sequential data blocks in a block cache. Each data block contains one or more data records. Each data record of a data record contains one or more values and a record marker marking the end of the data record. The data analytics system allocates a data block in the block cache to a worker thread. The worker thread parses the data block to identify the one or more data records contained within the data block. The data analytics system determines whether the data block was correctly parsed. Responsive to determining that the data block was correctly parsed, the data analytics system provides the one or more data records contained within the data block to a data analytics workflow.