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Thread: LVM vs LVM2
09-22-2009, 07:48 AM #1
- Join Date
- Jun 2009
LVM vs LVM2
What are the main differences between LVM and LVM2? Can I upgrade from LVM to LVM2?
Thanks in advance.
09-25-2009, 08:25 AM #2
- Join Date
- Jul 2009
Differences between LVM1 and LVM2
The new release of LVM, LVM 2, is available only on Red Hat Enterprise Linux 4 and later kernels. It is upwardly compatible with LVM 1 and retains the same command line interface structure. However it uses a new, more scalable and resilient metadata structure that allows for transactional metadata updates (that allow quick recovery after server failures), very large numbers of devices, and clustering. For Enterprise Linux servers deployed in mission-critical environments that require high availability, LVM2 is the right choice for Linux volume management. Table 1. A comparison of LVM 1 and LVM 2 summarizes the differences between LVM1 and LVM2 in features, kernel support, and other areas.
Features LVM1 LVM2
RHEL AS 2.1 support No No
RHEL 3 support Yes No
RHEL 4 support No Yes
Transactional metadata for fast recovery No Yes
Shared volume mounts with GFS No Yes
Cluster Suite failover supported Yes Yes
Striped volume expansion No Yes
Max number PVs, LVs 256 PVs, 256 LVs 2**32 PVs, 2**32 LVs
Max device size 2 Terabytes 8 Exabytes (64-bit CPUs)
Volume mirroring support No Yes, in Fall 2005
You can check RedHat site for more info.