About By Dor Laor. Dor Laor is Co-Founder and CEO at ScyllaDB, an open source drop in replacement for Apache Cassandra powered by C++. Previously, Dor was part of the founding team of the KVM hypervisor under Qumranet that was acquired by Red Hat. At Red Hat, Dor managed the KVM and Xen development for several years. He holds an MSc from the Technion and a Phd in snowboarding.