In this metagenomic project, ancient environmental DNA from Holocene lake sediments are analysed in order to reconstruct past ecosystems and postglacial recolonisation patterns of Scandinavia. We make use of shotgun sequencing in order to capture the widest range of the metagenomic diversity, which means dealing with a lot of heavy data files generated by next generation sequencing (NGS) platforms. All paired end raw sequencing files (N=500) are already on Dardel and waiting to be processed. A key challenge in metagenomic research is the taxonomic classification, where the balance between avoiding false positives or missing rare taxa needs to be carefully calibrated. We have a state-of-the-art pipeline in place, making use of comprehensive reference genome databases, which dramatically increases the computational load. In addition to testing and finetuning the pipeline, a subset of the data has been put through the first steps of the pipeline using a small compute project, which has quickly drained the allocated the core hours. The compute project is currently sitting at 135 % of its allocation until today, and 31.9 % of its total allocation. Based on these numbers, we realise that substantially more core hours are needed in order to process these samples. We therefore believe we are in need of a medium compute project, especially considering that the co-applicant Ernst Johnson is in the final stretch of his PhD project with limited time left to produce the results.