If its comes to performance issue in Unix operating systems, everybody will be behind on CPU.But not all the time CPU will cause for the performance problem. Because sometimes CPU may waiting for resources like Disk I/O, Swapping ,Network.As sysadmin you should able to pin point where the problem.vmstat is very useful command to determined where it the problem. After introduction Solaris zones, […]
Oracle Solaris
How to concatenate two tar files in Solaris
TAR binary is used to combine multiple files in to single archive with extension of “.tar” file.But using Solaris in-built tar utility, you can not combine two previously created tar files.If you want combine tar file then you have to install GNU-TAR binary.This concatenate feature is available in GNU tar which is freely available in sunfreeware website.Experiment :Here i am trying to […]
IO Bottleneck – Disk performance issue
Performance issues on Solaris: The below mentioned key resources will play a huge role in system performance. 1.Disk Utilization 2.CPU Utilization 3.Memory Usage 4.Network Bottle neck In the post we are going to see about disk performance issues and how to identify IO bottle neck. Generally a problem is identified when an application is not performing as we expected. […]
How to enable SAR(System Activity Reporter) in Solaris?
SAR:(System Activity Reporter) SAR is a legacy system monitoring tool which is used to report CPU activity, system loads average, memory/paging, LUN load, network activity.We can add SAR in crontab to monitor the server through out the day and this will help you to find the system disk I/O,memory utilization,CPU utilization any given time.Once you have the sar output files, you can use ksar graphical […]
Demonstration ZFS snapshots on Solaris
ZFS snapshot is one of the cool features in Solaris .Using the snapshot, we can take the online backup and using “zfs send” feature we can send the zfs snapshot stream to any remote location and receive from there as well.These snapshots are space optimized and snapshot will not hold any disk-space in the initial stage. It will just […]
How to cleanup veritas volume manager device tree ?
In Solaris , Sometimes veritas volume manger device tree will be messed up with newly assigned LUNS and you have to perform the device tree cleanup in a order to fix the device tree mess up. Below are two options for resolving device tree inconsistencies in VXVM. The first option does not require a reboot. […]
VXVM Failures
we may very often to fight with volume issues in day to day UNIX administration. When its come to veritas volume manager,it will be very less compare to other volume mangers. In rare cases you may need to face such a issues due environment(Like SAN issue),volume may go in to I/O error state or LUN paths will […]
how to configure Sun X86 Blade ILOM ?
In the last post we have seen how to configure SPARC based servers ILOM. Here i got an opportunity to post ilom configuration on Oracle SUN X86 blade servers.To accommodate these blade servers ,we may need to use SUN 6000 or SUN 8000 chassis. Here the assumption is we have SUN 6000 or SUN 8000 chassis in place and we are going to configure X86 blade […]
Sun ILOM – T5220, T5240, x4600, X4450 configure
ILOM is an independent system controller providing a command-line interface and web based interface on T-series oracle sun server hardware’s like T5120, T5220, T5240, T5440 T3, T-4 servers.It can monitor system temperature,voltages,internal disks, chassis fans,CPU’s and power supplies.We can configure ilom with snmp to send hardware alerts.ILOM provides remote system administration and Java web-based console […]
how to boot Solaris local zone in single user mode ?
Many of us known to boot the Solaris global zone in single user mode.But have you ever tried to boot Solaris non-global zone in single user mode ?.In SPARC based machines we have an “OK” prompt to boot the OS in single user mode and using grub menu, we can to boot on X86 machines in single user mode.So how can we […]