A repository of information technology questions and answers

Latest posts

Solaris FireEngine Project

Updated   Read time 3 min(s) 31 sec(s)   (1595 visits).

The Solaris FireEngine project is a high performance networking framework based on an IP classifier and vertical perimeters.

Deleting Windows temp files

Updated   Read time 3 min(s) 6 sec(s)   (2231 visits).

Any file under the Windows Temp folder is safe to delete. But that isn't the only place that temporary files are stored on Windows computers.

Understanding LLTSTAT output

Updated   Read time 4 min(s) 37 sec(s)   (3389 visits).

Veritas Cluster Server?s Low Latency Transport (LLT) protocol provides fast, kernel-to-kernel communication and monitors network connections.

Configurable ZFS Read and Write Throughput Limits

Updated   Read time 1 min 31 sec(s)   (3318 visits).

Setting the size of a ZFS dataset can ensure an appropriate allocation of space configuration that contains multiple volumes to service different clients

Giving 'scp' go faster stripes

Updated   Read time 1 min 23 sec(s)   (2543 visits).

Transferring files with scp isn't the quickest option, but if it's the only one there's a simple way to make it go a little quicker.

System Global Area (SGA)

Updated   Read time 2 min(s) 24 sec(s)   (2996 visits).

The maximum size of a single shared memory segment is specified by the shmmax (shm_max on Tru64 UNIX) kernel parameter.

Allocating Sufficient Swap Space

Updated   Read time 1 min 29 sec(s)   (2346 visits).

If the system needs more memory resources and the RAM is full, inactive pages in memory are moved to the swap space.

Merging Legato NetWorker Servers

Updated   Read time 5 min(s) 0 sec(s)   (2586 visits).

This document provides the necessary steps to allow Backup Administrators to Migrate or Consolidate several Legato NetWorker servers.

Faster SVM mirror resync

Updated   Read time 52 sec(s)   (2655 visits).

There are two way to change block size to get quickly synchronized disks in mirrored system

XP Tweaks

Updated   Read time 2 min(s) 59 sec(s)   (2454 visits).

Here, we've assembled 10 fast n' easy tweaks for any PC that break the factory mold and improve performance.

Tuning a Solaris UFS file system

Updated   Read time 3 min(s) 45 sec(s)   (2530 visits).

Using the tunesfs command you can modify certain parameters after creating the original file system without rebuilding the entire file system.

What are NetWorker Parallel Recoveries?

Updated   Read time 1 min 0 sec(s)   (2983 visits).

As the term has no exact definition it simply means reading multiple save streams at the same time but other definitions may be misread..

stop/start syslogd on Solaris (updated)

Updated   Read time 1 min 3 sec(s)   (3831 visits).

syslog is an important facility need in all enterprises. We as sysadmins look at syslogs as a critical source to troubleshoot performance issues

NetWorker performance

Updated   Read time 1 min 40 sec(s)   (946 visits).

Several factors into performance calculations, including CPU speed, data storage devices, network limitations, and the volume of network traffic

NetWorker Environment Tuning

Updated   Read time 3 min(s) 27 sec(s)   (2524 visits).

To obtain maximum efficiency and system utilisation, there are parameters that can be adjusted to tune the NetWorker environmen

Sizing a NetWorker Server and Storage Nodes

Updated   Read time 2 min(s) 59 sec(s)   (3033 visits).

Several factors affect a NetWorker server performance, including CPU, memory, paths and IO bandwidth and network bandwidth

ZFS Recommendations

Updated   Read time 2 min(s) 46 sec(s)   (2825 visits).

Because ZFS uses kernel addressable memory, we need to make sure to allow enough system resources to take advantage of its capabilities

ZFS Performance Monitoring

Updated   Read time 1 min 3 sec(s)   (3137 visits).

In ZFS, I/Os are scheduled similarly to how jobs are scheduled on CPUs.

Maximising NetWorker data throughput

Updated   Read time 9 min(s) 31 sec(s)   (2784 visits).

Maximising data throughput under NetWorker using paralleliusm and target session settings

NetWorker Media database scavenging

Updated   Read time 1 min 40 sec(s)   (3127 visits).

Media database scavenging is simply a way to force Legato NetWorker to rebuild the media database header files.

Solaris performance monitoring using K9 toolkit

Updated   Read time 31 sec(s)   (2284 visits).

In a nuyshell, the K9Toolkit is a collection of tools written using the KStat library on a Solaris 9 server to help locate performance bottlenecks.