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Re: Linux logical volume manager - a few questions

Hi Neal,

On Sunday, August 3, 2003, at 12:50  PM, Neal Lippman wrote:
1) Which lvm package to install? There are two obvious choices, lvm10
and lvm2. While lvm2 is the new rewrite, which is supposedly "stable",
it apparently lacks some features and according to the debian.org
description of the package is not yet ready for production use. So, I
assume I am correct in going for lvm10 at the present time?

I use lvm10, I have no experience with lvm2 though. lvm10 is rock solid, I have used it on disk arrays up to around 700G with no problems.

2) If I do go with lvm10, will upgrading to lvm2 once it is ready for
production use just be a matter of apt-get install'ing lvm2 and removing
lvm10, or are there incompatibilities in the on-disk structure that
would mean starting over from scratch? That would be a major problem
once I have stuff scattered across 160GB of logical space on two
physical drives.

I don't know about this.

3) lvm10 recommends kernel version 2.4.20; I am running the standard
2.4.18 on the server. It is crucial to do this upgrade? (I suppose it
wouldn't hurt since 2.4.20 contains the driver for my server's onboard
gigabit ethernet chip, which I am not presently using as 2.4.18 did not
support it, but still, I like to do as little as possible to the

I use lvm on both 2.4.18 and 2.4.19, it works fine.

4) Is anyone using lvm on their system who can comment on success,
failure, pitfalls, etc?

I use it on some high traffic servers, it works great. It is very useful in combination with reiserfs (apparently xfs also, I haven't tried it) you can extend volumes on the fly. I suggest creating your volumes fairly small and extending them as necessary, this allows you the most flexibility. I would recommend against putting your root partition on lvm though, it makes life difficult if you ever need to boot off a rescue disk etc.


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