■Overhead is imposed at each layer of the operation

■The copy operation is a block-for-block operation because the client system is not cognizant of the structure of the StorEdge filesystem, and therefore of the underlying relationship between the blocks in the live and checkpointed versions of the filesystem.

The new StorEdge internal cp command was engineered to confine the operation to the filer, resulting in far greater efficiency and speed.

6.1.4StorEdge cp Command

The StorEdge Command Line Interface (CLI) cp command effects the copy operation within the filer. As an ancillary benefit, the command is cognizant of the filesystem architecture and it can copy only those blocks that are not referenced in the live filesystem, using StorEdge's copy-on-write implementation.

FIGURE 6-11Sharing Blocks Between Live and Checkpoint File Systems

For example, in Figure 6-11after a cp restore operation, two versions of a File A - the Live Filesystem version and Checkpoint x's version - share the same block: 123. In this case when Block 123 is referenced by either version of File A, the same block will be accessed. Should a client modify Block 123 of File A in the live filesystem, StorEdge's checkpointing mechanism will ensure that the original Block 123 is preserved in checkpointed versions of the filesystem.

The syntax of the StorEdge cp command is:

cp [-c] source destination

This command simply copies the source to destination. The source should be a regular file. If the destination is a regular file, it will be overwritten by source. Otherwise, if it is a directory, the source will be copied to that directory. When using

Chapter 6 Checkpoints/Snapshots 6-17

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Sun Microsystems 5310 NAS manual StorEdge cp Command, 11Sharing Blocks Between Live and Checkpoint File Systems
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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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