Oracle International Corporation

Sun Microsystems, Inc.

Timothy Patrick Haley

Andrew M Rudoff

Young Jin Nam

Swanand Shreekant Rao

Michael W Shapiro

Mark Maybee

Cynthia A McGuire

Matthew T Simmons

Priya Krishnan

Implementations described and claimed herein provide systems and methods for migration data from a source to a target in the background using an optimal number of threads. In one implementation, a file system operation request is received at the target. The file system operation request specifying a read request for a directory having a directory level migration attribute on the target that is marked. An optimal number of threads is allocated for migrating the directory. Metadata for content in the directory is obtained from the source using the optimal number of threads. A directory entry for a file in the directory is created on the target using the metadata, the directory entry for the file associated with a file level migration attribute that is marked.

Systems and methods for multi-threaded shadow migration

Implementations described and claimed herein provide systems and methods for migration data from a source to a target in the background using an optimal number of threads. In one implementation, a directory entry in a source file system is compared to a size threshold. An optimal number of threads for a migration associated with the directory entry is allocated. The optimal number of threads is determined based on a degree of parallelism available for the migration and the comparison of the directory entry to the size threshold. The directory entry is migrated from the source file system to a target file system using the optimal number of threads.

Implementations described and claimed herein provide systems and methods for estimating migration progress. In one implementation, a target file system is initialized to which to migrate existing data from a source file system. An initial amount of data to be migrated to the target file system is estimated based on an examination of in-use space at a root of the source file system. Any mount points for nested file systems in the source file system are identified. An amount of data for each of the nested file systems is estimated based on an examination of in-use space at the mount point for the nested file system. An estimated total amount of data to be migrated from the source file system to the target file system is determined based on the initial amount of data to be migrated and the amount of data for each of the nested file systems.

Systems and methods for shadow migration progress estimation

A method, apparatus, and computer program product diagnosing and resolving faults is disclosed. A disclosed fault management architecture includes a fault manager suitable having diagnostic engines and fault correction agents. The diagnostic engines receive error information and identify associated fault possibilities. The fault possibility information is passed to fault correction agents, which diagnose and resolve the associated faults. The architecture uses logs to track the status of error information, the status of fault management exercises, and the fault status of system resources. Additionally, a soft error rate discriminator can be employed to track and resolve soft (correctible) errors in the system. The architecture is extensible allowing additional diagnostic engines and agents to be plugged in to the architecture without interrupting the normal operational flow of the computer system.

Error reporting to diagnostic engines based on their diagnostic capabilities

A bootstrap system for a computer with peripheral devices has a first level boot firmware program and a second level boot program loaded from disk by the first level program. The second level boot program contains a device tree constructed according to IEEE-1275 (Open Firmware) standards, describing currently known peripheral devices and computer resource allocations. The device tree is modifiable during boot operations to incorporate information about additional devices. The second level boot program scans I/O buses for additional devices not included in the current device tree and loads drivers only for the additional devices. The second level boot program further allows a user to enter information into the device tree. The second level boot program is preferably implemented under DOS emulation, and may be developed in a DOS-based code development environment and ported to the computer.

Growing community of inventors

Boulder, CO, United States of America

Timothy Patrick Haley