Re: replacing mounted rootdbs as raw diskspace

sukumar konduru wrote: > > Hi > > Our "rootdbs" has been created as mounted file system rather than raw > disk space. Our database is in another dbspace which is created as raw > diskspace. > > Is it really improves performance if we use raw diskspace rather than > unix file system?. What are the > steps needed in migrating root dbs as raw disk space? Yes, raw space is significantly faster. To do this: 1) bring the engine down: onmode -ky 2) copy the rootdbs file to the raw device: dd if=/datafs/rootdbs of=/dev/rdsk/sd2d bs=2k count={rootsize in pages} 3) delete or rename filesystem copy of rootdbs or remove the symbolic link you used for ROOTPATH in $ONCONFIG 4) link the ROOTPATH name from $ONCONFIG to the raw device as a symbolic link: ln -s /dev/rdsk/sd2d /datafs/rootdbs That should do it. Art S. Kagel