Yoshikazu Nojima created CLOUDSTACK-6369: --------------------------------------------
Summary: Qcow2's cluster_size option support Key: CLOUDSTACK-6369 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-6369 Project: CloudStack Issue Type: Improvement Security Level: Public (Anyone can view this level - this is the default.) Components: KVM Reporter: Yoshikazu Nojima Assignee: Yoshikazu Nojima Priority: Minor Fix For: Future To improve the qcow2 performance, it is important to tune parameters of "qemu-img create" command. preallocation=metadata option, which I am working on in CLOUDSTACK-6191 improves randam IOPS well, but the qcow2 image created with preallocation=metadata option cannot be used as a differential image. This "cluster_size" option improves IOPS of a differential qcow2 image which is created with preallocation=off. -- This message was sent by Atlassian JIRA (v6.2#6252)