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aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gnu.org header.s=fencepost-gnu-org header.b=BM28vqND; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Spam-Score: -4.52 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=gnu.org header.s=fencepost-gnu-org header.b=BM28vqND; dmarc=pass (policy=none) header.from=gnu.org; spf=pass (aspmx1.migadu.com: domain of "bug-guix-bounces+larch=yhetil.org@gnu.org" designates 209.51.188.17 as permitted sender) smtp.mailfrom="bug-guix-bounces+larch=yhetil.org@gnu.org" X-Migadu-Queue-Id: B5D46299C6 X-Spam-Score: -4.52 X-Migadu-Scanner: scn0.migadu.com X-TUID: oxfBu4sNc/sm Hey, > Do you mean time the copy or time the removal from that storage? You > know what, I=E2=80=99ll time both. I=E2=80=99ll need to get more space f= irst. I think > the trash directory is larger than the 500G that I got for testing the > SAN. Yeah I meant removal time :) I found this article[1] that suggests that over time the ext4 fragmentation can cause a performance drop that is very noticeable on hard drives. I'm trying to determine how fragmented is the sdb1 file-system, by running e4defrag and e2freefrag[2], but I'm not sure if they will complete soon. Copying and removing /gnu/store/trash on the SAN will be interesting but the ultimate test would be to be able to re-create the ext4 file-system directly on Berlin's sdb drive to evaluate the fragmentation role in this funny business. Thanks, Mathieu [1]: https://www.usenix.org/system/files/hotstorage19-paper-conway.pdf [2]: https://cromwell-intl.com/open-source/performance-tuning/file-systems.= html