RE: [vserver] apache security / Cookbook Vservers / vserver system usage

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From: Justin M Kuntz (
Date: Thu May 09 2002 - 21:23:32 EDT


Thank you very much for all of the details... so just so I'm clear,
basically the only problem you had with ext3 was that you accidentally
recompiled a kernel that didn't support it and so you lost support once you
rebooted that machine?

Have you used ext3 or ReiserFS specifically on machines with vserver
patches applied to the kernel? Have the immutability and unification
features worked for you even with the latest ctx10 2.4.18 patches?

The reason I'm confused is because you said "ext3... has proved fine on all
of our non vserver machines". I'm wondering what you're using on your
production vserver machines for base OS + filesystem. My plan is Red Hat
7.2 base + compiling our own 2.4.18 kernel from w/ vserver
patches, ext3, and 3ware support built-in.

Our data center is remote also - about 17 miles north of our office.
Offices and data center spaces don't tend to mix. :) I've found APC
MasterSwitch Plus to be a helpful addition for remote hard rebooting. I
want to get a StarTech IP KVM switch to connect to our main KVM matrix so
that we can even do remote BIOS/CMOS management. Compaq has a really cool
card call the Remote Insight Management Board, which supplies virtual
floppy, video, and power control on a per-server basis. I wish I could
find something like that for non-Compaq machines.

I really appreciate your help with my questions.

Thanks again,


                    "John Lyons"
                    <support_at_nsnoc To: <>
                    .com> cc:
                                         Fax to:
                    05/09/2002 Subject: RE: [vserver] apache security / Cookbook Vservers / vserver system usage
                    05:42 PM
                    Please respond
                    to vserver

> What OS are you running? Red Hat 7.2

RedHat 7.2

> ReiserFS or ext3?

Initially installed with ext3, patched kernel (our network cards aren't
installed with the pre compiled) got everything working fine for 2 months.
Upgraded kernel and patch to the next version in March and lost all Ext3
support in the kernel.

I'm off to the datacentre tomorrow to install network cards in the servers
so we'll have one for internet traffic and one for internal ssh and
Hopefully I'll be upgrading to the latest kernel and patch version at the
same time.

> earlier in the mailing list archive that the unification and immutable
> features aren't supported on Reiser. One of my associates did
> some testing
> and felt that ext3 wasn't mature enough or had some problems relative to
> Reiser.

Beyond loosing support with a kernel upgrade ext3, has proved fine on all
our non vserver machines. I do like the ability for a server to get a hard
reboot and not need a 70 mile drive to the data centre to fix the file

> I'd love to hear your experience. Incidentally, we are using the
> IDE hardware RAID controllers for RAID 10 support on
> our Linux boxes across 4 drives.

I've got other customers in our rack using one of these. Very impressive.
Quite tempted to use one on an nfs server for backups etc.


John Lyons
Netserve Consultants Ltd

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