Indication of sync points
When the data is written out to disk, a sync point is indicated in the log and new
transactions are written from that point forward.
Journal log logical volumes
By default, a single logical volume per volume group is used to contain the file system
journal logs. When you create a new file system, the journal is added to the existing
journal log logical volume. With default log logical volumes, the entire volume group
depends on a single log logical volume.
User-created logs override the default log placement and put the file system log on a
specific logical volume.
Inline logs
An inline log is a new feature specific to JFS2 file systems that allows you to log directly
to the file system. The default inline log size is 0.4% of the logical volume size
(in AIX 5L V5.1).
The following table lists the default inline log size in AIX 5L V5.2 and later.