Accessing Checkpointed Data

Access to the checkpointed versions of directories and files is achieved through the provision of a hidden, virtual directory - named .chkpnt - within each live directory. Changing the current directory to the virtual .chkpnt directory enables users to access checkpointed or prior versions of filesystem objects. Note the .chkpnt directories are hidden to prevent problems with applications that search through directory hierarchies, e.g., backup or virus scanning applications. Users can access objects in the .chkpnt directories by explicitly navigating to them.

For example:

"cd /live_directory/.chkpnt"

Will navigate the user to the checkpointed version of the directory live_directory, where they'll be able to view prior versions of objects from live_directory. Users can also reference objects explicitly.

For example, the command:

cp /live_directory/.chkpnt/cp1/old_file1.txt /live_directory

Would copy the cp1 version of old_file1 back to live_directory.

Note: .chkpnt is the default name for the hidden directories containing the checkpointed data and can be changed. See Compatibility Issues below.

If a directory is removed and a user wishes to access a checkpointed version of that directory, they can do so by navigating first to the parent directory (of the removed directory) and then traversing the directory hierarchy until they reach the desired version of the removed directory. In Figure 6-8,the directory d3 has been removed but the user can access a checkpointed version of d3 through the .chkpnt directory in its parent directory, d2.

In the example inFigure 6-8,cp1 is the name of a checkpoint that contains the desired version of the d2 directory.

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Sun Microsystems 5310 NAS manual Accessing Checkpointed Data
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5310 NAS specifications

Sun Microsystems, known for its innovative computing solutions, launched the Sun 5310 Network Attached Storage (NAS) system, which marked a significant advancement in the realm of storage solutions in the early 2000s. The 5310 NAS was designed to provide high-performance, reliable, and scalable storage tailored for enterprise environments.

One of the standout features of the Sun 5310 NAS is its file-serving capabilities, which support multiple protocols, notably NFS (Network File System) and CIFS (Common Internet File System). This dual-protocol support allowed organizations to seamlessly integrate the NAS into diverse IT ecosystems, facilitating interoperability between UNIX, Linux, and Windows systems. The enhanced file-sharing capabilities made it an ideal solution for businesses with mixed operating environments.

The Sun 5310 NAS incorporates cutting-edge technologies to ensure high availability and data integrity. The system utilized a RAID (Redundant Array of Independent Disks) technology, providing various RAID levels to protect against data loss while optimizing performance. Additionally, the device featured hot-swappable drives, enabling maintenance and upgrades with minimal downtime, a crucial factor for business continuity.

Equipped with advanced management software, the Sun 5310 NAS offered users an intuitive interface for monitoring storage health and performance. This software included comprehensive reporting functionalities that allowed IT administrators to oversee usage patterns and capacity planning efficiently.

Scalability was another defining characteristic of the Sun 5310 NAS. The system could easily expand with additional storage modules, accommodating the growing needs of an organization without the necessity for complete system overhauls. This flexibility ensured that businesses could adapt their storage solutions to meet evolving data storage needs without incurring significant costs or disruptions.

In terms of performance, the Sun 5310 NAS featured high I/O throughput achieved through its robust hardware architecture and optimized file serving capabilities. This performance baseline was crucial for organizations that relied on heavy data workloads and required rapid access to information.

In summary, the Sun 5310 NAS from Sun Microsystems embodied a forward-thinking approach to network storage, blending reliability, scalability, and multi-protocol support. Its user-friendly management software, combined with the robustness of RAID technology and hot-swappable drives, made it a preferred choice for enterprises looking to streamline their storage infrastructure while safeguarding critical data.
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