This is just to collect information about ephemeral storage on UEC and ec2.
on ec2, instance types are described at: http://docs.amazonwebservices.com/AWSEC2/latest/DeveloperGuide/index.html?instance-types.html type | arch | ephemeral disk| mounted ? ----------------------------------------------- m1.small | i386 | 150G sda2 ___ | sda2 -> /mnt c1.medium | i386 | 340G sda2 ___ | sda2 -> /mnt m1.large | amd64| 420G sd[bc] _ | sdb -> /mnt m1.xlarge | amd64| 420G sd[bcde] | sdb -> /mnt c1.xlarge | amd64| 420G sd[bcde] | sdb -> /mnt The above can be summed up as: if arch is i386, there is a single device, and that is sda2 if arch is amd64, there is more than 1 device, vmbuilder writes /etc/fstab that mounts the first (sdb) to /mnt on Eucalyptus, the available ephemeral disks depends on configuration. The storage available to an instance depends on the configuration of its instance type. If the configured storage amount is greater than the size of the root filesystem, then the instance will have access to a partition in /dev/sda2 that has a size of (config_value - root_size - swap_size). In all cases on eucalyptus, /dev/sda2 contains an empty ext2 the filesystem. Some other things to note: * In all cases UEC and EC2, /dev/sda1 is a filesystem the size of the registered image, and is mounted on / * In EUC, ephemeral storage is a ext2 filesystem. In ec2, it is ext3. * on ec2, i686 instances have a ~ 1G swap partition on /dev/sda3 * I'm not exactly certain on how swap_size (in Euca) is determined. in default config of m1.small, there is ~ 650M partition for swap (663212 blocks). -- UEC images do not mount ephemeral disk on /mnt at boot https://bugs.launchpad.net/bugs/458850 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
