Sun Microsystems, Inc.

Vmware, Inc.

Rene W Schmidt

Daniel Kerry Hiltgen

Scott Ronald Violet

Hans E Muller

One embodiment of the present invention is a method including: (a) representing virtual primary disk data and state data of a virtual machine in a unit of storage; (b) exposing the virtual primary disk data of the virtual machine to a guest of the virtual machine to allow the guest to access the virtual primary disk data; and (c) preventing the guest from accessing the state data for the virtual machine.

Securing virtual machine data

Some embodiments of the present invention include a method comprising: accessing units of network storage that encode state data of respective virtual machines, wherein the state data for respective ones of the virtual machines are stored in distinct ones of the network storage units such that the state data for more than one virtual machine are not commingled in any one of the network storage units.

Storage architecture for virtual machines

A browser-independent and automatic apparatus and method for receiving, installing, and launching applications from a browser is described. According to one embodiment, a helper application is registered with a browser for a specified file type. When the browser encounters a link to a metafile of the specified file type, the file is downloaded to the requesting system and the helper application is invoked to process the downloaded file. In the context of a Java&trade; implementation, the downloaded metafile comprises a short launch file specification for a Java&trade; application, and specifies a classpath as a set of Universal Resource Identifiers (&ldquo;URIs&rdquo;), a Java&trade; Runtime Environment (&ldquo;JRE&rdquo;) version, security considerations, and other relevant information concerning the Java&trade; application to be executed. According to aspects of the present invention, automatic installation of Java&trade; archive files (&ldquo;JAR files&rdquo;) and class files based on the URIs from which they are downloaded is implemented, automatic updates and versioning are supported without any central administration, and automatic installation of multiple JREs is facilitated. Embodiments of the present invention may also be used to facilitate other applications, such as launching Java&trade; applications directly from a browser without having to execute them within the browser, and to tie web contents to the appropriate corresponding viewer application.

Browser-independent and automatic apparatus and method for receiving, installing and launching applications from a browser on a client computer

According to aspects of the present invention, an original archive file having one or more entries is created, where each entry in the original archive file is itself a file, and where each entry in the archive file may comprise any file type, including an archive file. The original archive file is transmitted to a client computer. Subsequently, a target archive file is created, wherein one or more of the entries in the target archive file are typically expected to be identical to one or more entries in the original archive file. Given the original archive file and the target archive file, a difference archive file is created. The difference archive file comprises an index file describing the changes between the original archive file and the target archive file, and also comprises a set of entries corresponding to the entries in the target archive file that are not contained in the original archive file. The difference archive file is transmitted to the client computer, instead of requiring that the entire target archive file be transmitted. At the client computer, the difference archive file is applied to the original archive file to produce a synthesized archive file, wherein the synthesized archive file is functionally identical to the target archive file, and wherein each entry in the synthesized archive file is identical to a corresponding entry in the target archive file.

Apparatus and method for incremental updating of archive files

Methods and apparatus for facilitating a global safepoint operation in a multithreaded computer system are disclosed. According to one aspect of the present invention, each thread keeps track of its safepoint regions by maintaining a variable which indicates a state, such as whether the current region of the thread is safe, unsafe, or transitional. In this manner, it can be determined whether a thread is currently in a safepoint region without suspending the thread. When a thread is currently in a safepoint region, the thread can continue to operate while a global safepoint operation, such as garbage-collection is being performed. When the thread begins to transition out of the safe region, it moves into a transitional region. The transitional region automatically blocks the transition into the non-safe region to assure that the safepoint operation occurs in a safe region.

Growing community of inventors

Palo Alto, CA, United States of America

Rene W Schmidt