April 2010
Intermediate to advanced
276 pages
6h 16m
English
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Appendix B. LVM and MySQL
The default installation of RedHat Enterprise Linux and CentOS 5 will create all mount points (including the root mount point, /) on Logical Volume Manager's (LVM) Logical Volumes (LVs).
LVM brings about many benefits. With particular relevance for MySQL high availability is the snapshot feature. This allows you to take a consistent snapshot of a logical volume (for example, the logical volume with the ext3 filesystem mounted on /var/lib/mysql) without affecting the currently mounted volume.
LVM then allows for this snapshot to be mounted somewhere else (/mnt/mysql-3pmtoday) and a backup can then be run against this snapshot without affecting the MySQL instance running on the original logical volume.
The actual process ...
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