Posts Tagged 'filesystems'
A file system (or filesystem) is a means to organize data expected to be retained after a program terminates by providing procedures to store, retrieve and update data, as well as manage the available space on the device(s) which contain it. [http://en.wikipedia.org/wiki/File_system]
Published on Sunday, 18 June 2006 20:34
Written by Administrator
I am still testing my NAS system
(seven 300Gb disks) and while testing
), and Googling I found that page:
blog is about the Google Summer of Code project "ZFS filesystem for
For all of You that do not know what FUSE
is, FUSE is the Filesystem in
Userspace Linux kernel
. This module allows nonprivileged users to create their own
filesystems without writing any kernel code.
has many features which can benefit all kinds of
users - from the simple end-user to the biggest enterprise systems:
- it checksums all data (and meta-data), which makes
it possible to
detect hardware errors (hard disk corruption, flaky IDE cables..).
- means that the on-disk state is consistent at all times, there's no
need to perform a lengthy filesystem check after forced reboots/power
Instantaneous snapshots and clones
- it makes it possible to have hourly, daily and weekly backups
efficiently, as well as experiment with new system configurations
without any risks.
- Built-in compression,
- creating filesystems is as easy as creating a new
directory. You can
efficiently have thousands of filesystems, each with it's own quotas
and reservations, and different properties (compression algorithm,
checksum algorithm, etc..).
stripes (RAID-0), mirrors
(RAID-1) and RAID-Z (it's like software RAID-5, but more efficient due
to ZFS's copy-on-write transactional model).
- Variable sector
sizes, adaptive endianness etc...
In fact this is a sponsored Google summer of code project. Note that Apple is
also currently porting ZFS
under OS-X. That could mean that ZFS
be mainstream in a future not far away than 2 years.
And I expect to test RAID-Z
...For those interested by RAID-Z raw performances, You can read this highly technical blog entry: WHEN TO (AND NOT TO) USE RAID-Z
Sun expect to have a stable ZFS
version by June 2006.