Bart Schaefer wrote: > We have a large MySQL database currently running on a CentOS 3.x > server with an external SCSI RAID device. This is currently an ext2 > filesystem because it was migrated once previously from an even older > RedHat system. umount /dev/sdb1 tunefs -j /dev/sdb1 vi /etc/fstab (and, change ext2 to ext3 on the mount line for this filesystem) mount /dev/sdb1 and voila, its EXT3 now, with journalling. > We need to add storage capacity to this database and > prepare for additional future growth. One of the options under > consideration is to move to CentOS 5 and use LVM. > > Of some concern is that we run some pretty heavy-duty queries against > this database in close to real time, so we don't want the switch to > scalable storage to have a significant impact on read latency. > > Consequently I'm looking for sources of information on two topics: > - What kind of performance can we expect from an LVM group as compared > to mounting the RAID array directly? > - What's involved in migrating our filesystem from ext2 to LVM with a > minimum of downtime? > > Thanks in advance for directions. > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos >