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Motr Known Issues

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Yeshpal Jain edited this page May 5, 2021 · 4 revisions

BESEG size not set based on LVM that are created for VM's

Currently for VM motr meta-data(BESEG) size is fixed to the value of MOTR_M0D_IOS_BESEG_SIZE.

  • Solution : For long duration testing it is recommended to use larger value for the MOTR_M0D_IOS_BESEG_SIZE
  • Execute below command to find MOTR_M0D_IOS_BESEG_SIZE
grep MOTR_M0D_IOS_BESEG_SIZE /etc/sysconfig/motr
  • Execute below command to find lvm sizes
for i in $(lvs -o lv_path | grep srvnode | grep raw) ; do echo "lvm size of $i = $(lvs $i -o LV_SIZE --noheadings --units b --nosuffix)"  ; done
  • Set minimum lvm size derived from the above command for MOTR_M0D_IOS_BESEG_SIZE in /etc/sysconfig/motr
sed -i "/MOTR_M0D_IOS_BESEG_SIZE/s/.*/MOTR_M0D_IOS_BESEG_SIZE={min_lvm_size}/" /etc/sysconfig/motr
  • shutdown and bootstrap cluster with mkfs after doing this changes hctl shutdown; hctl bootstrap --mkfs /var/lib/hare/cluster.yaml

example:

$ grep MOTR_M0D_IOS_BESEG_SIZE /etc/sysconfig/motr
#MOTR_M0D_IOS_BESEG_SIZE=4294967296

$ for i in $(lvs -o lv_path | grep srvnode | grep raw) ; do echo "lvm size of $i = $(lvs $i -o LV_SIZE --noheadings --units b --nosuffix)"  ; done
lvm size of /dev/vg_srvnode-1_md1/lv_raw_md1 =   26306674688
$ sed -i "/MOTR_M0D_IOS_BESEG_SIZE/s/.*/MOTR_M0D_IOS_BESEG_SIZE=26306674688/" /etc/sysconfig/motr

$ grep MOTR_M0D_IOS_BESEG_SIZE /etc/sysconfig/motr
MOTR_M0D_IOS_BESEG_SIZE=26306674688

$ hctl shutdown; hctl bootstrap --mkfs /var/lib/hare/cluster.yaml
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