Home

JFS2

JFS2, short for Journaled File System 2, is IBM's second-generation journaling filesystem. It was developed to succeed the original JFS and is implemented on IBM platforms such as AIX and in Linux environments via the JFS2 kernel module. JFS2 emphasizes reliability and scalability, using a journaling mechanism to capture metadata changes before they are committed to the main filesystem. This design permits faster crash recovery and reduces the risk of corruption after power losses.

Key capabilities typically cited include 64-bit addressing for large volumes and files, support for large filesystems,

In Linux, JFS2 is available as part of IBM's JFS2 driver in the kernel, though it competes

See also: JFS, XFS, ext4.

metadata
journaling
with
optional
data
journaling,
online
growth
of
volumes,
and
support
for
advanced
filesystem
features
such
as
extended
attributes,
POSIX
ACLs,
and
quotas.
It
uses
a
variety
of
block
sizes
and
efficient
metadata
structures
to
optimize
performance
for
server
workloads.
JFS2
is
designed
to
integrate
with
IBM
storage
and
backup
tools
and
to
provide
predictable
performance
in
enterprise
environments.
with
other
filesystems
such
as
ext4,
XFS,
and
Btrfs.
In
AIX,
JFS2
is
commonly
used
for
enterprise
systems
requiring
reliable
journaling
and
large-scale
storage.
IBM
continues
to
maintain
JFS2
as
part
of
its
filesystem
repertoire,
with
updates
addressing
compatibility
and
reliability.