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With limited budget we cannot imagine using only storage class memory, which leads to the use of a heterogeneous tiered storage hierarchy. In order to make the most efficient use of the high performance tier in this storage hierarchy, we need to be able to place user data on the right tier and at the right time. In this paper, we assume a 2-tier storage hierarchy with a high performance tier and a high capacity archival tier. Files are placed on the high performance tier at creation time and moved to capacity tier once their lifetime expires (that is once they are no more accessed). The main contribution of this paper lies in the design of a file lifetime prediction model solely based on its path based on the use of Convolutional Neural Network. Results show that our solution strikes a good trade-off between accuracy and under-estimation. Compared to previous work, our model made it possible to reach an accuracy close to previous work (around 98.60% compared to 98.84%) while reducing the underestimations by almost 10x to reach 2.21% (compared to 21.86%). The reduction in underestimations is crucial as it avoids misplacing files in the capacity tier while they are still in use.<\/jats:p>","DOI":"10.1145\/3469379.3469392","type":"journal-article","created":{"date-parts":[[2021,6,6]],"date-time":"2021-06-06T12:43:56Z","timestamp":1622983436000},"page":"99-107","update-policy":"https:\/\/doi.org\/10.1145\/crossmark-policy","source":"Crossref","is-referenced-by-count":5,"title":["Predicting file lifetimes for data placement in multi-tiered storage systems for HPC"],"prefix":"10.1145","volume":"55","author":[{"given":"Luis","family":"Thomas","sequence":"first","affiliation":[{"name":"ENSTA Bretagne Lab-STICC, CNRS, UMR 6285, Brest, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sebastien","family":"Gougeaud","sequence":"additional","affiliation":[{"name":"CEA Bruy\u00e8res-le-Ch\u00e2tel, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"St\u00e9phane","family":"Rubini","sequence":"additional","affiliation":[{"name":"Univ. 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