1. High Performance File System Service for Cloud Computing Kenji Kobayashi, Osamu Tatebe University of Tsukuba, JAPAN

2. Towards Cloud File System Compute Cloud physical machines (e.g. Amazon EC2) Storage Cloud disk array (e.g. Amazon S3) We propose file system service in Compute Cloud Application modification required -REST, SOAP based protocol ✗ Low and Unstable Performance ✗ Expensive Cost for constructing -High bandwidth Network between EC2 and storage ✗ Maintainability ○ Availability ○

3. Gfarm File System migration replication remote access merely using local disk Availability Maintenancability ✗ ✗ Availability Maintainability ○ ○ Towards Cloud File System (2)

4. Towards Cloud File System (3) Construct File system service using stable HostOS on physical machines VM HostOS the HostOS is the baseOS for managing VM. need to solve this problem to take advantage of local file access stable virtualized environment hides the underlying physical configuration volatile difficult to utilize file access locality

5. System Design Construct Gfarm file system on compute cloud –Host OS provides functionality of I/O server Create the physical configuration file dynamically –Take advantage of local access performance gfsd VM Gfarm client HostOS gfsd VM Gfarm client HostOS gfsd VM Gfarm client HostOS gfsd VM Gfarm client HostOS gfsd VM Gfarm client HostOS gfsd VM Gfarm client HostOS Virtualized environment prevents to identify the Host OS running on physically same node Need some mechanism to identify the physical configuration

6. System Design (2) Eucalyptus NC gfsd gfmd Mapping File 172.16.xxx.xxx 172.16.xxx.xxx ･･･ ･･･ VM Gfarm client Eucalyptus NC gfsd VM Gfarm client Eucalyptus NC gfsd VM Gfarm client ･･･ Eucalyptus NC generates mapping file dynamically reply for message to access gfsd real network request metadata HostOS Inform the mapping to metadata server

7. Thank you for your attention.