Checking Log Files

You can check the status of the point-in-time copy software by examining two system log files:

/var/opt/SUNWesm/ds.log

The /var/opt/SUNWesm/ds.log file contains timestamped messages about the point-in-time copy software, including error messages and informational messages. For example:

Mar 05 15:56:16 scm: scmadm cache enable succeeded

Mar 05 15:56:16 ii: iiboot resume cluster tag <none>

/var/adm/messages

The /var/adm/messages file contains timestamped messages about the point-in-time copy software, including general system error and informational messages. For example:

Mar 5 16:21:24 doubleplay pseudo: [ID 129642 kern.info] pseudo-device: ii0

Mar 5 16:21:24 doubleplay genunix: [ID 936769 kern.info] ii0 is /pseudo/ii@0

Improving Performance

If the Sun StorEdge Availability Suite software is used with a filesystem, tuning the number of SV threads might produce better performance.

When a filesystem flushes its cache, it generates many parallel write operations. The SV’s default setting of 32 threads could produce a bottleneck. You can increase the number of SV threads. The maximum number of threads allowed is 1024.

Note – Each thread consumes 32k of memory.

The sv_threads value is in the /usr/drv/conf/sv.conf file. Because the file is read when a module loads, changes to the sv_threads value do not take effect until you reboot the system.

2 Sun StorEdge Availability Suite 3.2 Software Troubleshooting Guide • December 2003

Page 12
Image 12
Sun Microsystems 3.2 manual Checking Log Files, Improving Performance

3.2 specifications

Sun Microsystems 3.2, often referred to as SunOS 3.2, was a notable release of the Sun operating system that emerged during the rapidly evolving landscape of computer technology in the early 1980s. This operating platform was designed specifically for Sun Workstations, utilizing the robust hardware architecture developed by Sun Microsystems. The introduction of SunOS 3.2 marked a significant step forward in the development of UNIX-like operating systems optimized for entrepreneurship and scientific applications.

One of the main features of SunOS 3.2 was its adherence to the Berkeley Software Distribution (BSD) model, which allowed for advanced networking capabilities, enhanced performance, and efficient resource management. BSD's influence provided SunOS 3.2 with TCP/IP networking protocols, allowing users to connect to other devices seamlessly and manage network resources easily. This feature was crucial during a time when networking was becoming increasingly vital for organizations.

The system's support for virtual memory was another innovative characteristic. SunOS 3.2 utilized demand paging, which allowed programs to use more memory than was physically installed on their machines, significantly improving multitasking and overall system responsiveness. This capability was particularly advantageous for enterprises that relied on large-scale computations and data analysis.

SunOS 3.2 also introduced support for the Sun Window System, which meant users could utilize graphical user interfaces for interacting with applications, moving away from purely text-based command interfaces. This transition paved the way for more intuitive user experiences in the realm of computing, making powerful UNIX capabilities more accessible.

The inclusion of software utilities such as the C shell (csh) and a variety of development tools further strengthened SunOS 3.2’s position as a suitable platform for developers. The system provided robust development environments for programming in languages like C and assembly, catering to custom application requirements across different industries.

Lastly, security features were integrated into SunOS 3.2 to safeguard sensitive data and enhance system integrity. Permission settings and user authentication mechanisms were refined, allowing organizations to securely manage their computing resources.

In summary, SunOS 3.2 represented a landmark evolution in operating systems, showcasing a blend of advanced networking, memory management, graphical user interface, development tools, and security—elements that defined a generation of computing within the high-performance ecosystem of Sun Microsystems.