Oracle International Corporation

Young Jin Nam

Aaron Dailey

John Forte

Timothy Patrick Haley

Swanand Shreekant Rao

Aspects of dynamic data compression selection are presented. In an example method, as uncompressed data chunks of a data stream are compressed, at least one performance factor affecting selection of one of multiple compression algorithms for the uncompressed data chunks of the data stream may be determined. Each of the multiple compression algorithms may facilitate a different expected compression ratio. One of the multiple compression algorithms may be selected separately for each uncompressed data chunk of the data stream based on the at least one performance factor. Each uncompressed data chunk may be compressed using the selected one of the multiple compression algorithms for the uncompressed data chunk.

Dynamic data compression selection

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.

Growing community of inventors

Cupertino, CA, United States of America

Young Jin Nam