Oops, based on Michael's response, I realized that mine might be not quite right. Both data and journal *space* are necessary, but the journals can be created, by default, within the filesystem device, with no need for gfs_journal entry in config file. BTW, OpenGFS has supported external journals for over a year at this point ... would this be a useful feature for GFS? -- Ben -- Opinions are mine, not Intel's > -----Original Message----- > From: linux-cluster-bounces@xxxxxxxxxx > [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of Cahill, Ben M > Sent: Wednesday, July 07, 2004 11:07 AM > To: linux-cluster@xxxxxxxxxx > Subject: RE: [Linux-cluster] Gfs_data vs gfs_journal > > They are both necessary. > > gfs_data is the device/partition for filesystem data (i.e. files and > on-disk metadata). > > Each node in the cluster also needs a separate journal > device/partition > in which to redundantly record metadata, to enable the filesystem to > recover gracefully from node failure/crash. > > There's some documentation about this in the OpenGFS project: > > opengfs.sourceforge.net/docs.php > > CAUTION: OpenGFS is *not* the same as current RedHat GFS; many things > (e.g. lock protocols) are different ... but the basic idea is > the same. > See WHATIS-OpenGFS, and HOWTO-generic, just to see if they help you > understand. But remember to rely on current RedHat GFS docs > for current > installation, components, and capabilities info. > > -- Ben -- > > Opinions are mine, not Intel's > > > -----Original Message----- > > From: linux-cluster-bounces@xxxxxxxxxx > > [mailto:linux-cluster-bounces@xxxxxxxxxx] On Behalf Of > Richard Mayhew > > Sent: Wednesday, July 07, 2004 6:24 AM > > To: Discussion of clustering software components including GFS > > Subject: [Linux-cluster] Gfs_data vs gfs_journal > > > > Hi, > > > > Could some one explain or point me in the right direction in the > > differences between gfs_data and gfs_journal in the pool > config file. > > > > Which is the better option, and why? > > > > Thanks > > Richard. > > > > -- > > > > Linux-cluster@xxxxxxxxxx > > http://www.redhat.com/mailman/listinfo/linux-cluster > > > > > > -- > > Linux-cluster@xxxxxxxxxx > http://www.redhat.com/mailman/listinfo/linux-cluster > >
