I have been dealing with Solaris 10 Live upgrade issues from almost five years but still the new LU patches are not able to fix the common issues like updating the menu.lst file and setting the default boot environment. If the system is configured with ZFS root filesystem, then you have to follow the Live upgrade […]
Solaris 10
How to Measure the bandwidth between Linux / Solaris hosts ?
All the new servers are shipping with 10 Gbps built-in network adapters . At the same time, servers are virtualized and one physical server may hosts many virtual servers. For an example, VMware ESXi hypervisor will be directly installed on physical server and multiple VM’s will be created on top of that. So all the VM’s will share the same 10Gbps […]
How to convert controller disk naming to SSD on Solaris ?
Have you ever been analysed the SAR(System activity reporter) reports on Solaris server for the disk performance issues ? If you would have done that , you might noticed that all the disks & LUN’s will be shown as “ssdXXX” names instead of cXtXdXs2. If you run “iostat” command without “n” option, you can see that […]
Shellshock bug – vulnerability on Bash shell
Millions of computers are using bash shell (command interpreter ). New security flaw has been found on bash(Bash Code Injection Vulnerability (CVE-2014-6271) and it allows attackers can take the system control remotely. Heartbleed wave was just over on last april (Openssl vulnerability ).Is Shell-shock hurts more than Heartbleed ? Off-course Yes. Heartbleed was all about sniffing the system […]
Solaris Local Zone’s lsof
In Solaris local zone lsof will not work.By default all the application should have configured with specific port number.But sometimes your application will not start if that port has been already occupied by another application process.In this situation, you will get error like “unable to bind port <port-number>”if you try to start the application. Traditionally we […]
How to Identify Solaris Processor Cores ?
For hardware inventory, we may need to provide the Processor details like number installed physical processors , number core per processor on Solaris SPARC and X86 system. SunMicro system doesn’t make any complication to identify the CPU information on Solaris Operating system.To list the physical processor and core,we have the binary called “prsinfo” to pull the […]
How to Measure the Network Bandwidth Between Solaris Nodes?
There is no command available in any Unix like operating systems to measure the actual bandwidth of network by sending the real packets over the network. OS developers intentionally left out this option since such type of commands will hammer the system network. But we need such kind of tool in project phase of the system where you need to perform some […]
How to Cleanup the Liveupgrade on Solaris ?
Again I back to one of my favorite topic.Yes,its liveupgrade. As we all know liveupgrade is newly introduced in Solaris 10 and it has great feature if you use along with ZFS filesystem. Solaris Live upgrade made the OS patching is more simple and it will save lot of time.But liveupgrade has lot of bugs and it […]
How to Find IOWAIT on Solaris ?
This article is the follow up article of I/O bottle neck issues.Once you have determine the I/O-wait, then you are good proceed with this article.I/O wait is something that processor are waiting for I/O to complete either on disk or network.In production systems ,most of the application will be configured to write on the disk or LUNS […]
Linux – Performance Issues Troubleshooting
When it comes to performance issues on any operating systems ,then you need lot of patience to troubleshoot it before contacting the operating system vendors.Here we are going to see how to troubleshoot the Redhat Linux performance issues. The performance issue mainly raises due to system resource shortage. If the application is not properly configured according to the system […]