Page History

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• change service_offering and disk_offering table in cloud database.
  alter table service_offering add column total_bytes_sec bigint(20) unsigned default 0;
  alter table service_offering add column total_iops_sec bigint(20) unsigned default 0;

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• disk_offering add column total_bytes_sec bigint(20) unsigned default 0;
  alter table disk_offering add column total_iops_sec bigint(20) unsigned default 0;

• add global configurations
  INSERT IGNORE INTO `cloud`.`configuration` VALUES ('Advanced', 'DEFAULT', 'management-server', 'vm.disk.throttling.io_rate', 0, 'Default disk I/O rate in requests per second allowed in User vm\'s disk. ');
  INSERT IGNORE INTO `cloud`.`configuration` VALUES ('Advanced', 'DEFAULT', 'management-server', 'vm.disk.throttling.bytes_rate', 0, 'Default disk I/O rate in bytes per second allowed in User vm\'s disk. ');

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add "Disk Rate (BPS)" and "Disk Rate (IOPS)" in Offerings ( compute,system,disk)
display "Disk Rate (BPS)" and "Disk Rate (IOPS)" in the detail page of offerings.

Discussions

• Is it necessary to limit the disk I/O of systemvms?
• For Attached additional Volume(AddVolumetoVM), is the limitation set to vm.service_offering (if not 0) or volume.disk_offering?
• the changes of names and labels.

References

• Features/DiskIOLimits : http://wiki.qemu.org/Features/DiskIOLimits^{Image Removed}
• Testcase Virtualization IO Throttling: https://fedoraproject.org/wiki/QA:Testcase_Virtualization_IO_Throttling^{Image Removed}
• I/O throttling is experimentally supported from QEMU 1.1 : http://wiki.qemu.org/ChangeLog/1.1#Block_devices^{Image Removed}
• Libvirt Domain XML format (Disk) : http://libvirt.org/formatdomain.html#elementsDisks^{Image Removed}

Appendix

Appendix A:

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