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发表于 2003-11-19 10:34:25
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Oracle Cluster File System (OCFS) presents a consistent file system image across the servers in a cluster. OCFS allows administrators to take advantage of a files system for the Oracle database files (data files, control files, and archive logs) and configuration files. This eases administration of Oracle9i Real Application Clusters.
Firewire Patches fixes some issues with Firewire on Linux and enables shared disk on top of Firewire drivers. Firewire allows developers to easily and cheaply build a clustered system on a shared disk, which is useful for testing clustered applications and checking out the advanced features of Oracle's Real Application Clusters technology. The Firewire cards needed to build a cluster can cost as little as 10% as much as the required FiberChannel hardware.
NIC Failover allows a user to set up network card failover on Linux. Oracle's Linux team has used this proof of concept code to test Oracle's Real Application Clusters.
Watchdog Driver Patches are fixes submitted to the 2.4. kernel tree for inclusion in Linux kernel. In the case of an Oracle cluster, if a node in a cluster gets out of sync with the shared disk, Watchdog automatically shuts down the node before it corrupts the disk.
I/O Fence provides a preliminary iI/O fence implementation that can be used as an alternative to the Watchdog driver. When left-over write operations from failed databases (cluster function failed on the nodes, but the nodes are still running at the OS level) reach the storage system after the recovery process starts, this can damage the consistency of the stored data. I/O Fence prevents this from happening.
Developer features include:
Libaio is a library for accessing the new AIO system calls (asynchronous i/o) for the Linux kernel. This library is a thin, state-keeping wrapper that conforms to the Single Unix Specification for aio_read, aio_write, aio_error, aio_return and aio_suspend functions, and also implements lio_listio and aio_reap for batch processing. This library requires a kernel patch with Ben Lahaise's latest AIO code.
Rasta is a framework for describing tasks on a computer system. Rasta makes it easy for individual developers or teams of developers to write consistent dialogs and wizards for end-user tasks like product installation and configuration. To build a wizard or dialog, the developer creates a description of the task in XML files, and then Rasta's back-end library parses the XML files and hands them off to Rasta's front-end client which renders them to the end-user. Rasta dialogs and wizards support NLS through its use of Timbo.
Timbo is a message catalog library that makes it easy to build natural language-specific source files, used for internationalization. Timbo is built as a simple hashed database of message indexes.
Userfs with GnomeVFS is a filesystem which runs partially in user space and can be linked with GnomeVFS. Since Userfs has the actual filesystem code in user space, it becomes much easier for a developer to build or extend file systems than if they were in the kernel. Linkage with GnomeVFS makes accessing various kinds of local and remote file systems, e.g. ftp or webdav, transparent to the user and developer.
Miscellaneous Code Fragments are a bundle of smaller apps that show how to write good graphical toolkit applications on Linux. These code fragments comprise some lessons learned by Oracle's Linux development team while building the other libraries. |
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发表于 2003-11-17 15:57:02
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