- Posted In
- Red Hat Ceph Storage
I have faced instance problems over openstack which use ceph rbd as back-end storage.
I did extend volume(cinder served on CEPH RBD) from 5TB to 6TB by attaching additional 1TB cinder volume and vgextend and lvextend in Openstack instance which used LVM.
after that, with high disk busy ratio linux system fall to D-stat.
the openstack instance is RHEL 7.2, xfs filesystem.
App : postgresql 1ea, tomcat 1ea
Red Hat said, "Red Hat Ceph Storage RBD devices are not supported with LVM in CEPH 1.3".
Before extending LVM, that systems were working well.
I haven't found any documents or information not to use LVM over CEPH RBD.
Please, I need some help.