Jfs and jfs2

sumathi.k · September 17, 2009, 12:54am

Hi all,

Can anyone define the difference between jfs and jfs2 filesystem as well as usage of jfs log files....

Thanks....

faruk · September 17, 2009, 1:12am

go through the site for difference between jfs & jfs2

Help -

Casey · September 28, 2009, 7:49pm

Google has many and very complete answers to your question, you should take a look there...

Regards,

ravager · September 29, 2009, 3:58am

jfs2 is all you need to know there is no real bennifit in using jfs any more

funksen · September 29, 2009, 8:01am

the information, that it's not possible reduce the filesystem size of a jfs filesystem while it's mounted should be enough for not using it

nagchundu · October 10, 2009, 10:30am

in jfs number of inodes are fixed,in jfs2 dynamically inodes are generated
jfs inode size will be max 128 bytes ,in jfs2 max size is 512 bytes
jfs have only one log file but jfs2 every FS can have own log file
log file is observe the process in file system

raba · October 11, 2009, 2:28am

only reason for using jfs is need for compression. Else always choose JFS2

zxmaus · October 11, 2009, 5:05am

Hi,
I think these days - and with the current 64bit AIX and application versions, nobody would really consider jfs any more - and its likely that IBM will drop support for jfs in one of the next AIX versions. Still, there are very old 32bit applications out there, that insist on the jfs api - they just won't work on jfs2. In addition, the old jfs filesystem indeed had their benefit - using 32bit AIX and having a large amount of mini-files, the performance of jfs had been better than the performance of jfs2 due to the linear structure.

Kind regards
zxmaus