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Full-Text Articles in Physical Sciences and Mathematics
Restfs: The Filesystem As A Connector Abstraction For Flexible Resource And Service Composition, Joseph P. Kaylor, Konstantin Läufer, George K. Thiruvathukal
Restfs: The Filesystem As A Connector Abstraction For Flexible Resource And Service Composition, Joseph P. Kaylor, Konstantin Läufer, George K. Thiruvathukal
George K. Thiruvathukal
The broader context for this chapter comprises business scenarios requiring resource and/or service composition, such as (intra-company) enterprise application integration (EAI) and (inter-company) web service orchestration. The resources and services involved vary widely in terms of the protocols they support, which typically fall into remote procedure call (RPC)~\citeBirrell84implementingremote, resource-oriented (HTTP~\citeFielding96hypertexttransfer and WEBDAV~\citewebdav) and message-oriented protocols. By recognizing the similarity between web-based resources and the kind of resources exposed in the form of filesystems in operating systems, we have found it feasible to map the former to the latter using a uniform, configurable connector layer. Once a remote resource has been …
Online Layered File System (Olfs): A Layered And Versioned Filesystem And Performance Analysis, Joseph P. Kaylor, Konstantin Läufer, George K. Thiruvathukal
Online Layered File System (Olfs): A Layered And Versioned Filesystem And Performance Analysis, Joseph P. Kaylor, Konstantin Läufer, George K. Thiruvathukal
George K. Thiruvathukal
We present a novel form of intra-volume directory layering with hierarchical, inheritance-like namespace unification. While each layer of an OLFS volume constitutes a subvolume that can be mounted separately in a fan-in configuration, the entire hierarchy is always accessible (online) and fully navigable through any mounted layer. OLFS uses a relational database to store its layering metadata and either a relational database or any (virtual) host file system as its backing store, along with metadata and block caching for improved performance. Because OLFS runs as a virtual file system in user-space, its capabilities are available to all existing software without …
Restfs: Resources And Services Are Filesystems, Too, Joseph P. Kaylor, Konstantin Läufer, George K. Thiruvathukal
Restfs: Resources And Services Are Filesystems, Too, Joseph P. Kaylor, Konstantin Läufer, George K. Thiruvathukal
George K. Thiruvathukal
We have designed and implemented RestFS, a software frame-work that provides a uniform, configurable connector layerfor mapping remote web-based resources to local filesystem-based resources, recognizing the similarity between thesetwo types of resources. Such mappings enable programmaticaccess to a resource, as well as composition of two or moreresources, through the local operating system’s standardfilesystem application programming interface (API), script-able file-based command-line utilities, and inter-process com-munication (IPC) mechanisms. The framework supports au-tomatic and manual authentication. We include several ex-amples intended to show the utility and practicality of ourframework.