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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