Differences between QEMU and KVM

QEMU QEMU is a userland type 2 (i.e runs upon a host OS) hypervisor for performing hardware virtualization (not to be confused with hardware-assisted virtualization), such as disk, network, VGA, PCI, USB, serial/parallel ports, etc. It is flexible in that it can emulate CPUs via dynamic binary translation (DBT) allowing code written for a given processor to beContinue reading “Differences between QEMU and KVM”

Ceph: Daemons have recently crashed

Ceph can issue many health warning messages and one of these messages is “daemons have recently crashed”. If this warning message is present in ceph cluster status “ceph -s” output, means it is not archived by the administrator. You can examine the crashes and send them to the Ceph community. Because of the crash, theContinue reading “Ceph: Daemons have recently crashed”