Subversion Repositories or1k

IBM's Journaled File System (JFS) for Linux

JFS Homepage:  http://oss.software.ibm.com/jfs/

Team members
------------
Dave Kleikamp      shaggy@austin.ibm.com  
Dave Blaschke      blaschke@us.ibm.com
Steve Best         sbest@us.ibm.com
Barry Arndt        barndt@us.ibm.com

The following mount options are supported:

iocharset=name  Character set to use for converting from Unicode to
                ASCII.  The default is compiled into the kernel as
                CONFIG_NLS_DEFAULT.  Use iocharset=utf8 for UTF8
                translations.  This requires CONFIG_NLS_UTF8 to be set
                in the kernel .config file.

resize=value    Resize the volume to <value> blocks.  JFS only supports
                growing a volume, not shrinking it.  This option is only
                valid during a remount, when the volume is mounted
                read-write.  The resize keyword with no value will grow
                the volume to the full size of the partition.

nointegrity     Do not write to the journal.  The primary use of this option
                is to allow for higher performance when restoring a volume
                from backup media.  The integrity of the volume is not
                guaranteed if the system abnormally abends.

integrity       Default.  Commit metadata changes to the journal.  Use this
                option to remount a volume where the nointegrity option was
                previously specified in order to restore normal behavior.

errors=continue         Keep going on a filesystem error.
errors=remount-ro       Default. Remount the filesystem read-only on an error.
errors=panic            Panic and halt the machine if an error occurs.

JFS TODO list:

Plans for our near term development items

   - enhance support for logfile on dedicated partition

Longer term work items

   - implement defrag utility, for online defragmenting
   - add quota support
   - add support for block sizes (512,1024,2048)

Please send bugs, comments, cards and letters to shaggy@austin.ibm.com.

The JFS mailing list can be subscribed to by using the link labeled
"Mail list Subscribe" at our web page http://oss.software.ibm.com/jfs/.