Thursday, April 12, 2012

Advantages of RHEL6 over RHEL5

1.Ext4 file system is introduced.

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.

2. xen is removed and kernel virtualization machine (KVM) is introduced.

      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.

3. neat command is removed.

4. portmap service is removed.

5. iscsi is introduced, which supports for SAN.

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.

6. rpmbuild is available, which is used to create our own rpms.

7. File encyption is added.

8. palimpsest is available for disk management.

9. Virtual machine will run only on 64bit processors.

10. postfix service is recommended instead of sendmail service

11.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.