Good Morning, We have encountered a very odd issue. Where files are being created that show as double in size under du, then they do using ls or du --apparent-size.
under ls we see 119G ~> ls -lh \ > szscl21_24_128_b1p50_t_x4p300_um0p0840_sm0p0743_n1p265.genprop.n162.strange.t_0_22_26_28_31.sdb3160b -rw-rw-r-- 1 edwards lattice 119G Sep 14 21:48 szscl21_24_128_b1p50_t_x4p300_um0p0840_sm0p0743_n1p265.genprop.n162.strange.t_0_22_26_28_31.sdb3160b which du --apparent-size agrees with ~> du -h --apparent-size \ > szscl21_24_128_b1p50_t_x4p300_um0p0840_sm0p0743_n1p265.genprop.n162.strange.t_0_22_26_28_31.sdb3160b 119G szscl21_24_128_b1p50_t_x4p300_um0p0840_sm0p0743_n1p265.genprop.n162.strange.t_0_22_26_28_31.sdb3160b under du we see 273G However du itself shows more then double (so we are beyond "padding out a block" size). ~> du -h \ > szscl21_24_128_b1p50_t_x4p300_um0p0840_sm0p0743_n1p265.genprop.n162.strange.t_0_22_26_28_31.sdb3160b 273G szscl21_24_128_b1p50_t_x4p300_um0p0840_sm0p0743_n1p265.genprop.n162.strange.t_0_22_26_28_31.sdb3160b There is nothing unusual going on via the file layout according to lfs getstripe: ~> lfs getstripe \ > szscl21_24_128_b1p50_t_x4p300_um0p0840_sm0p0743_n1p265.genprop.n162.strange.t_0_22_26_28_31.sdb3160b szscl21_24_128_b1p50_t_x4p300_um0p0840_sm0p0743_n1p265.genprop.n162.strange.t_0_22_26_28_31.sdb3160b lmm_stripe_count: 1 lmm_stripe_size: 1048576 lmm_pattern: raid0 lmm_layout_gen: 0 lmm_stripe_offset: 0 lmm_pool: production obdidx objid objid group 0 7431775 0x71665f 0 Client is running: lustre-client-2.12.6-1.el7.centos.x86_64 lustre servers are: lustre-osd-zfs-mount-2.12.9-1.el7.x86_64 kmod-lustre-osd-zfs-2.12.9-1.el7.x86_64 kernel-3.10.0-1127.8.2.el7_lustre.x86_64 lustre-2.12.9-1.el7.x86_64 kernel-devel-3.10.0-1127.8.2.el7_lustre.x86_64 kmod-lustre-2.12.9-1.el7.x86_64 kmod-zfs-0.7.13-1.el7.jlab.x86_64 libzfs2-0.7.13-1.el7.x86_64 zfs-0.7.13-1.el7.x86_64 w/r, Kurt J. Strosahl (he/him) System Administrator: Lustre, HPC Scientific Computing Group, Thomas Jefferson National Accelerator Facility
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