Solid State Disk (SSD)
If you are installing Centrych to a solid state disk, selecting this option can help improve its performance and extend its longevity. Enabling this option also enables; zRAM, Zcache, tmpfs, noatime, and the swap and var partitions.
Please refer to the SSD page for detailed information on Centrych's SSD support.
Enabling this option enables the hibernate menu item in the desktop panel and also ensures that the swap partition will be large enough to save the state of memory to disk. This option will also enable the swap partition, which is required for hibernation to work.
Please be aware that the Ubuntu 12.04.2 release notes state that hibernation has been disabled by default due to it being "unreliable, very slow and confusing to have two suspend modes."
This option is enabled by default and requires the swap partition to be enabled.
zRAM provides a ram-based, compressed filesystem that Centrych uses for high-priority swap space to improve overall system performance by minimizing swapping to a disk-based swap partition.
Please refer to the zRAM page for detailed information on Centrych's use of zRAM.
This option is enabled by default. When enabled, it causes the installer to add the boot option
Zcache is a kernel facility that optimizes the use of the cleanpage cache. The page buffers in this cache contained data, typically from file I/O, that the kernel has released, so they are "clean" for reuse. Zcache will take these pages and attempt to compress them to save space.
This option is enabled by default and requires the swap partition to be enabled. If disabled, the
tmpfs is a ram-based filesystem that is used in Centrych for the
Please refer to the tmpfs page for detailed information on Centrych's use of tmpfs.
Guided Partitioning Selections
Centrych provides an intelligent partition sizing algorithm that can optionally create partitions for the
Please refer to the disk partitioning page for detailed information regarding Centrych's partition sizing algorithm.
The noatime and nodiratime options, when enabled, can improve system performance by eliminating the extra disk I/O operations that are performed when updating file and/or directory last access times.
The noatime option disables last access time updates to files and directories while the nodiratime option only disables last access time updates to directories.
The noatime option also enables the
Note: several web sites recommend adding both of these options to
Only one or the other, not both, are needed.
Note: the live DVD document for this page contains links to the following additional pages that have not been included here: