I did as follow and it works, without storing the metadata on zram: truncate -s500M disk1.dd truncate -s500M disk2.dd losetup /dev/loop0 /root/disk1.dd losetup /dev/loop1 /root/disk2.dd
pvcreate /dev/loop0 pvcreate /dev/loop1 vgcreate vg00/dev/loop0 /dev/loop1 vgcreate vg00 /dev/loop0 /dev/loop1 lvcreate --type raid1 --name raid1vol -L 400M vg00 [root@puppetserver:~# lvs -ao +devices LV VG Attr LSize Pool Origin Data% Move Log Copy% Convert Devices raid1vol vg00 rwi-a-m- 400.00m 100.00 raid1vol_rimage_0(0),raid1vol_rimage_1(0) [raid1vol_rimage_0] vg00 iwi-aor- 400.00m /dev/loop0(1) [raid1vol_rimage_1] vg00 iwi-aor- 400.00m /dev/loop1(1) [raid1vol_rmeta_0] vg00 ewi-aor- 4.00m /dev/loop0(0) [raid1vol_rmeta_1] vg00 ewi-aor- 4.00m /dev/loop1(0) Now I will the metadata to other pvs: truncate -s 100M meta1.dd truncate -s 100M meta2.dd losetup /dev/loop2 meta1.dd losetup /dev/loop3 meta2.dd vgextend vg00 /dev/loop2 vgextend vg00 /dev/loop3 pvmove -n 'raid1vol_rmeta_0' /dev/loop0 /dev/loop2 pvmove -n 'raid1vol_rmeta_1' /dev/loop1 /dev/loop3 vgchange -an vg00 0 logical volume(s) in volume group "vg00" now active vgchange -ay vg00 1 logical volume(s) in volume group "vg00" now active 2017-09-25 11:30 GMT+02:00 Alexander 'Leo' Bergolth <[email protected]>: > Hi! > > I tried to move the raid1 metadata subvolumes to different PVs (SSD > devices for performance). > > Moving with pvmove works fine but activation fails when both legs of the > metadata had been moved to external devices. (See below.) > > Interestingly moving just one metadata LV to another device works fine. > (Raid LV can be activated afterwards.) > > I guess raid1 metadata on different PVs is not supported (yet)? > > I am using Centos 7.4 and kernel 3.10.0-693.el7.x86_64. > > Cheers, > --leo > > -------------------- 8< -------------------- > modprobe zram num_devices=2 > echo 300M > /sys/block/zram0/disksize > echo 300M > /sys/block/zram1/disksize > > pvcreate /dev/sda2 > pvcreate /dev/sdb2 > pvcreate /dev/zram0 > pvcreate /dev/zram1 > > vgcreate vg_sys /dev/sda2 /dev/sdb2 /dev/zram0 /dev/zram1 > lvcreate --type raid1 -m 1 --regionsize 64M -L 500m -n lv_boot vg_sys > /dev/sda2 /dev/sdb2 > > pvmove -n 'lv_boot_rmeta_0' /dev/sda2 /dev/zram0 > # and maybe > # pvmove -n 'lv_boot_rmeta_1' /dev/sdb2 /dev/zram1 > > -------------------- 8< -------------------- > Creating vg_sys-lv_boot > dm create vg_sys-lv_boot LVM-l6Eg7Uvcm2KieevnXDjLLje3wqmSVG > a1e56whxycwUR2RvGvcQNLy1GdfpzlZuQk [ noopencount flush ] [16384] (*1) > Loading vg_sys-lv_boot table (253:7) > Getting target version for raid > dm versions [ opencount flush ] [16384] (*1) > Found raid target v1.12.0. > Adding target to (253:7): 0 1024000 raid raid1 3 0 region_size > 8192 2 253:3 253:4 253:5 253:6 > dm table (253:7) [ opencount flush ] [16384] (*1) > dm reload (253:7) [ noopencount flush ] [16384] (*1) > device-mapper: reload ioctl on (253:7) failed: Input/output error > -------------------- 8< -------------------- > [ 8130.110467] md/raid1:mdX: active with 2 out of 2 mirrors > [ 8130.111361] mdX: failed to create bitmap (-5) > [ 8130.112254] device-mapper: table: 253:7: raid: Failed to run raid array > [ 8130.113154] device-mapper: ioctl: error adding target to table > -------------------- 8< -------------------- > # lvs -a -o+devices > LV VG Attr LSize Pool Origin Data% Meta% > Move Log Cpy%Sync Convert Devices > lv_boot vg_sys rwi---r--- 500.00m > lv_boot_rimage_0(0),lv_boot_rimage_1(0) > [lv_boot_rimage_0] vg_sys Iwi-a-r-r- 500.00m > /dev/sda2(1) > [lv_boot_rimage_1] vg_sys Iwi-a-r-r- 500.00m > /dev/sdb2(1) > [lv_boot_rmeta_0] vg_sys ewi-a-r-r- 4.00m > /dev/zram0(0) > [lv_boot_rmeta_1] vg_sys ewi-a-r-r- 4.00m > /dev/zram1(0) > -------------------- 8< -------------------- > > Full vgchange output can be found at: > http://leo.kloburg.at/tmp/lvm-raid1-ext-meta/ > > > -- > e-mail ::: Leo.Bergolth (at) wu.ac.at > fax ::: +43-1-31336-906050 > location ::: IT-Services | Vienna University of Economics | Austria > > _______________________________________________ > linux-lvm mailing list > [email protected] > https://www.redhat.com/mailman/listinfo/linux-lvm > read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/ > -- .~. /V\ // \\ /( )\ ^`~'^
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