On May 24, 2004 12:45 -0700, M K wrote: > On a related note, wouldnt it be more efficient to > have a single dedicated hard drive, with multiple > partitions to store journals - one for each ext3 > system? No, because then each filesystem would cause seeking to its part of the journal for each transaction (unless the dedicated device was NVRAM). In general, the writes to the journal are pure overhead unless you actually crash so they need to be as efficient as possible at write time and the complexity at recovery time is much less critical. Having all of the journal writes for multiple filesystems stream to a single block device without any seeking is the best. Making a larger journal also helps a lot in the performance area, but you can't always afford to consume so much RAM on a system (especially a larger journal for each filesystem). > --- Andreas Dilger <adilger@xxxxxxxxxxxxx> wrote: > > It is possible now to use an external block device > > for a single filesystem. > > The on-disk format is designed to allow multiple > > filesystems to share the > > same device, but that has never been fully > > implemented. Cheers, Andreas -- Andreas Dilger http://sourceforge.net/projects/ext2resize/ http://www-mddsp.enel.ucalgary.ca/People/adilger/ _______________________________________________ Ext3-users@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/ext3-users
