Extended attributes are supported for ext2 and ext3. The epoll System Calls Graphical user interface GUI programs and some daemons use poll to watch for changes on a file. The new epoll system works like pollbut is much more scalable: To use the new polling system:
References LVM is a tool for logical volume management which includes allocating disks, striping, mirroring and resizing logical volumes.
With LVM, a hard drive or set of hard drives is allocated to one or more physical volumes. LVM physical volumes can be placed on other block devices which might span two or more disks.
Since a physical volume cannot span over multiple drives, to span over more than one drive, create one or more physical volumes per drive. When "partitions" reach their full capacity, free space from the volume group can be added to the logical volume to increase the size of the partition.
When a new hard drive is added to the system, it can be added to the volume group, and partitions that are logical volumes can be increased in size. Logical Volumes On the other hand, if a system is partitioned with the ext3 file system, the hard drive is divided into partitions of defined sizes.
If a partition becomes full, it is not easy to expand the size of the partition. Even if the partition is moved to another hard drive, the original hard drive space has to be reallocated as a different partition or not used.
For comprehensive information on the creation and configuration of LVM partitions in clustered and non-clustered storage, please refer to the Logical Volume Manager Administration guide also provided by Red Hat. In addition, the Installation Guide for Fedora 14 also documents how to create and configure LVM logical volumes during installation.
LVM version 2, or LVM2, was the default for previous versions of Fedora which used the device mapper driver contained in the 2. LVM2 can be upgraded from versions of Fedora running the 2. Using system-config-lvm The LVM utility allows you to manage logical volumes within X windows or graphically.
Alternatively you can start the Logical Volume Management utility by typing system-config-lvm from a terminal. In the example used in this section, the following are the details for the volume group that was created during the installation: Displayed under 'Uninitialized Entities'.
DO NOT initialize this partition. LogVol03 - LVM swap 28 extents. The figure below illustrates the main window in the LVM utility. The logical and the physical views of the above configuration are illustrated below.
The three logical volumes exist on the same physical volume hda2. In this window, you can select and remove a volume from the volume group or migrate extents from the volume to another volume group. Physical View Window The figure below illustrates the logical view for the selected volume group.
The logical volume size is also indicated with the individual logical volume sizes illustrated. Logical View Window On the left side column, you can select the individual logical volumes in the volume group to view more details about each.
In this example the objective is to rename the logical volume name for 'LogVol03' to 'Swap'. To perform this operation select the respective logical volume and click on the Edit Properties button. This will display the Edit Logical Volume window from which you can modify the Logical volume name, size in extents and also use the remaining space available in a logical volume group.
The figure below illustrates this. Please note that this logical volume cannot be changed in size as there is currently no free space in the volume group. Click on the OK button to save your changes this will remount the volume. To cancel your changes click on the Cancel button. To revert to the last snapshot settings click on the Revert button.
Edit Logical Volume 3. In this example partitions 3, 4, 5, 6 and 7 were created during installation and some unpartitioned space was left on the hard disk. Please view each partition and ensure that you read the 'Properties for Disk Entity' on the right column of the window to ensure that you do not delete critical data.
Uninitialized entities are illustrated below. Uninitialized Entities In this example, partition 3 will be initialized and added to an existing volume group. · Modifying the group class permission mode with chmod also only changes the mask, and does not change the real group class permission mode.
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