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f2878a801c
Performance with direct I/O here is noticable better, so use it instead of buffered write whenever we can.
91 lines
2.8 KiB
Bash
91 lines
2.8 KiB
Bash
#!/usr/bin/env bash
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# Copyright (C) 2016 Red Hat, Inc. All rights reserved.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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# Exercise changing of caching mode on both cache pool and cached LV.
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SKIP_WITH_LVMPOLLD=1
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. lib/inittest
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aux have_cache 1 5 0 || skip
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aux prepare_vg 2
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lvcreate --type cache-pool -L18 -n cpool $vg "$dev1"
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lvcreate -H -L14 -n $lv1 --cachemode writeback --cachesettings migration_threshold=204800 --cachepool $vg/cpool $vg "$dev2"
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#cat "$DM_DEV_DIR/$vg/$lv1" >/dev/null
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#aux delay_dev "$dev2" 300 1000 $(get first_extent_sector "$dev2"):
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#dmsetup status $vg-$lv1
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#dmsetup table $vg-$lv1
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for i in $(seq 1 10) ; do
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echo 3 >/proc/sys/vm/drop_caches
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dd if=/dev/zero of="$DM_DEV_DIR/$vg/$lv1" bs=64K count=20 oflag=direct || true
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echo 3 >/proc/sys/vm/drop_caches
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dd if="$DM_DEV_DIR/$vg/$lv1" of=/dev/null bs=64K count=20 oflag=direct || true
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done
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lvs -o+cache_dirty_blocks,cache_read_hits,cache_read_misses,cache_write_hits,cache_write_misses $vg/$lv1
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#
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# Drop later, code loading dm tables directly without lvm
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# RHBZ 1337588
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#
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#dmsetup table
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#echo "STATUS before cleaner"
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#dmsetup status
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#dmsetup load --table "0 28672 cache 253:4 253:3 253:5 128 1 writethrough cleaner 0" $vg-$lv1
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#dmsetup resume $vg-$lv1
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#sleep 1
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#dmsetup table
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#echo "STATUS after cleaner 1sec"
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#dmsetup status --noflush
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#dmsetup suspend --noflush $vg-$lv1
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#dmsetup resume $vg-$lv1
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#dmsetup load --table "0 28672 cache 253:4 253:3 253:5 128 1 passthrough smq 2 migration_threshold 204800" $vg-$lv1
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#dmsetup status $vg-$lv1
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#dmsetup load --table "0 28672 cache 253:4 253:3 253:5 128 1 writethrough smq 2 migration_threshold 204800" $vg-$lv1
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#dmsetup resume $vg-$lv1
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#dmsetup status $vg-$lv1
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#dmsetup table $vg-$lv1
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#dmsetup ls --tree
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#exit
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check lv_field $vg/$lv1 cache_mode "writeback"
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lvchange --cachemode passthrough $vg/$lv1
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check lv_field $vg/$lv1 cache_mode "passthrough"
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lvchange --cachemode writethrough $vg/$lv1
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check lv_field $vg/$lv1 cache_mode "writethrough"
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lvchange --cachemode writeback $vg/$lv1
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check lv_field $vg/$lv1 cache_mode "writeback"
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lvconvert --splitcache $vg/$lv1
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lvs -a $vg
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check lv_field $vg/cpool cache_mode "writeback"
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lvchange --cachemode passthrough $vg/cpool
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check lv_field $vg/cpool cache_mode "passthrough"
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lvchange --cachemode writethrough $vg/cpool
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check lv_field $vg/cpool cache_mode "writethrough"
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lvchange --cachemode writeback $vg/cpool
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check lv_field $vg/cpool cache_mode "writeback"
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lvs -a $vg
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vgremove -f $vg
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