Worldwide Server Market Share

Top 5 Corporate Family, Worldwide Server Systems Factory Revenue, Second Quarter of 2011 (Revenues are in Millions)

Vendor	2Q11 Revenue	2Q11 Market Share	2Q10 Revenue	2Q10 Market Share	2Q11/2Q10 Revenue Growth
1. IBM	$4,008	30.5%	$3,219	28.9%	24.5%
1. HP	$3,922	29.8%	$3,589	32.2%	9.3%
3. Dell	$1,814	13.8%	$1,725	15.5%	5.1%
4. Oracle	$941	7.2%	$903	8.1%	4.2%
4. Fujitsu	$849	6.5%	$363	3.3%	133.6%
Others	$1,621	12.3%	$1,355	12.1%	19.7%
All Vendors	$13,156	100.0%	$11,154	100.0%	17.9%

RHEL 6 Vs RHEL 5

Advantages of RHEL6 over RHEL5

 

 

Red Hat Enterprise Linux (RHEL) is an open source, linux based operating system developed by Red Hat Inc. It is popularly used as server operating system. Its first release was the RHEl 2.1 which was released in the year 2002. After the first version of RHEL, new and better versions quickly followed like RHEL 3,4,5,etc. Now in 2010, the newest version has been released. It is RHEL 6. Now in this post lets discuss the main advantages of RHEL6 over RHEL5.

 

RHEL6 being the latest release obviously have a lot of new features. The advantages are:

 

 

•   A new level of virtualisation
        RHEL6 introduces the use of KVM (Kernel-based Virtual Machine) as its hypervisor. In the earlier releases Xen hypervisor was used. The main advantage of KVM is that a new kernel should not be installed like in Xen. It also supports the installation of many virtual operating systems like Windows, Linux, Solaris,etc. It is easy to manage.
•   Ext4 is made the default filesystem
        Ext4 has many new advantages than Ext3 which is used in earlier versions of RHEL. Ext4 is comparatively faster and easy to manage. It supports supports up to 100TB with the addition of Scalable Filesystem Add-one.   

    

•  Improved level of Security
        RHEL6 has advanced level of security. SELinux (Security Enhanced Linux) features are improved and a new set of SELinux rules has been added to provide security to virtual machines from hackers and attackers. This new feature is called SVirt.
•  New Networking Features
       RHEL6 is released with improved and new networking features. It supports IPv6. It uses NFSv4 (Network File Transfer) for the sharing of files in the network rather than NFSv3. It also supports iSCSI (internet Small Computer System Interface) partitions. The network manager in RHEL6 supports Wi-Fi capabilities.

•  Use of Drivers
       RHEL6 has drivers for speeding up operations under KVM, VMware and Xen.

• Increase in the support period provided by Red Hat.
        RHEL6 has a long period of support provided by Redhat. It provides updates for 7 years and also a extra 3 years of service as  paid service. Therefore it means that its period of support is twice the period of support provided by other linux distributors like Ubuntu , Debian, etc.

• Improvements of minor updates
        Red Hat releases minor versions such as 6.1, 6.2. These minor versions are the accumulated updates of the major version. The new minor releases will not only contain bug fixes but will also have major changes and new features.  

RHEL6 has been released with many new feature which make RHEL6 more useful than RHEL5. RHEL6 is somewhat similar to Fedora 12, so the Fedora users should find RHEL6 familiar. Due to all these reasons the release of RHEL6 is a huge step of advancement and also an achievement in the field of open source. 

 

nfs in AIX

nfs in AIX

 

server side:

 

1. Starting nfs service #mknfs –N

 

2. Starting nfs daemons #startsrc -g nfs /startsrc -s nfsd

 

3. Editing /etc/exports file for mentioning the file to share for client.or exportfs -i /test (for temp.)

  Ex: 1. #vi /etc/exports

         2. /test (fs/file to share with client)

         3.: wq!

 

4. Exporting fs #exportfs or #/usr/sbin/exportfs –a

 

5. Check fs has been exported #showmount -e servername

 

Client Side:

 

1. Creating mt. point #mkdir /test

 

2. Mounting the remote fs.  #mount 10.11.80.14:/test /test

 

  10.11.80.14 — remote server ipaddress.

  /test — fs shared by server

 /test — mt pt.for the client to access the nfs shared fs.

 Or go to smitty #smitty mknfsmnt

 

3. Check for mounted fs #df -g

 

4. Go into the dir. #cd /test

 

5. List the file. #ls

 

    Now we can access and modify the file from the server Based on the file permission and nfs share permission (Where we make entry in. — step 3 on server side) 

 

6. (Optional) edit the /etc/filesystems file and

  put entry for mounting the fs while booting.