jshorr Absent Member.
Absent Member.
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question on raid logical volumes, partitions

Greetings,

I'm soon going to embark on a Netware to Linux migration for the company I'm working with. Pretty basic Netware 6.5 tree with file shares, edir/ldap, iPrint, a few other things. I have taken couses 3089 and 3090 and read the OES2 SP1 install guide. I have a few quick questions for the experts:

1. When configuring the RAID using a modern HP server for example, should I be defining a seperate logical drive for the system partition regardless of the RAID level chosen? Assuming this is a file server and I will be using NSS volumes on it. I know based on reading I can configure EVMS to handle the system device and then add NSS partitions to the same logical drive. But I could also just carve up the Raid array into multiple logical drives. The truth is this question can be asked for a Windows or Netware system too. Personally I've usually just used a single logical device (unless it was larger than 2TB) and let the OS carve it up. What do people recommend? If making a logical drive for system what would you recommend assuming a modern server with a good amount of space?

2. On page 43 of the installing OES 2 SP1 Linux install guide they recommend sizes for the different partitions. For example 3GB for root, 4GB or more for var, etc. Could anyone make any more specific suggestions? Is what Novell has mentioned enough in practice? For example for years I've always used at least 10GB for a Netware SYS volume.

3. I guess this is maybe too basic a question but if I make X amount system and the rest for NSS and in the future want to add extra services am I going to run the risk of running out of room because of adding new stuff that won't work with NSS? Should I leave a certain amount of space free?

Thank you very much for your assistance.
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14 Replies
jmarton2 Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

On Thu, 08 Oct 2009 14:46:02 +0000, jshorr wrote:

> 1. When configuring the RAID using a modern HP server for example,
> should I be defining a seperate logical drive for the system partition
> regardless of the RAID level chosen? Assuming this is a file server and
> I will be using NSS volumes on it.


Yes, if you plan on using NSS, create a separate logical drive for use
with NSS.

> 2. On page 43 of the installing OES 2 SP1 Linux install guide they
> recommend sizes for the different partitions. For example 3GB for root,
> 4GB or more for var, etc. Could anyone make any more specific
> suggestions? Is what Novell has mentioned enough in practice? For
> example for years I've always used at least 10GB for a Netware SYS
> volume.


Probably look at using at least 20GB for /, and a couple of gigs for swap.

> 3. I guess this is maybe too basic a question but if I make X amount
> system and the rest for NSS and in the future want to add extra services
> am I going to run the risk of running out of room because of adding new
> stuff that won't work with NSS? Should I leave a certain amount of
> space free?


I don't see that being an issue.



--
Joe Marton
Novell Knowledge Partner
SUSE Linux Enterprise 11 is ready for action.

Joe Marton Emeritus Knowledge Partner
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jshorr Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

jmarton;1869110 wrote:
On Thu, 08 Oct 2009 14:46:02 +0000, jshorr wrote:

> 1. When configuring the RAID using a modern HP server for example,
> should I be defining a seperate logical drive for the system partition
> regardless of the RAID level chosen? Assuming this is a file server and
> I will be using NSS volumes on it.


Yes, if you plan on using NSS, create a separate logical drive for use
with NSS.

> 2. On page 43 of the installing OES 2 SP1 Linux install guide they
> recommend sizes for the different partitions. For example 3GB for root,
> 4GB or more for var, etc. Could anyone make any more specific
> suggestions? Is what Novell has mentioned enough in practice? For
> example for years I've always used at least 10GB for a Netware SYS
> volume.


Probably look at using at least 20GB for /, and a couple of gigs for swap.

> 3. I guess this is maybe too basic a question but if I make X amount
> system and the rest for NSS and in the future want to add extra services
> am I going to run the risk of running out of room because of adding new
> stuff that won't work with NSS? Should I leave a certain amount of
> space free?


I don't see that being an issue.



--
Joe Marton
Novell Knowledge Partner
SUSE Linux Enterprise 11 is ready for action.


Thank you Joe. So if I could ask a quick follow-up, what would you recommend on say a fairly modern HP server with 4GB memory? I am clearly a linux beginner, you're saying I don't need to create all these different partitions that Novell mentions on Page 43, and just leave it all as the / partition right? Maybe it's overkill but I am thinking maybe 32GB would be a good number for the system logical drive, that's pretty much what I do for a Windows System at this point... thanks.
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jmarton2 Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

On Thu, 08 Oct 2009 15:26:02 +0000, jshorr wrote:

> Thank you Joe. So if I could ask a quick follow-up, what would you
> recommend on say a fairly modern HP server with 4GB memory? I am
> clearly a linux beginner, you're saying I don't need to create all these
> different partitions that Novell mentions on Page 43, and just leave it
> all as the / partition right?


Well other than a separate partition for swap, yeah. Some people like
having /opt, /var, /tmp, etc on their systems so that if one of those
locations fills up it doesn't fill up the root filesystem. I haven't
done that yet, though.

> Maybe it's overkill but I am thinking
> maybe 32GB would be a good number for the system logical drive, that's
> pretty much what I do for a Windows System at this point... thanks.


Sounds good.



--
Joe Marton
Novell Knowledge Partner
SUSE Linux Enterprise 11 is ready for action.

Joe Marton Emeritus Knowledge Partner
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elagrew Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

We are in the process of migrating as well. Here is what I did.

1. Create two Logical drives in IBM raid manager.
a. One 40GB raid 5 drive for os
b. The rest of the space as raid 5 for NSS volumes
c. Set both drives to 64 KB stripe
2. Use latest DVD for SLES 10
a. Do not select the “add on media option” at this time. We will do OES later
b. Set hardware clock to Local Time. Default is UTC.
3. Use advanced/custom partitioning to select the 40GB drive for the SLES install
a. Set Boot to 500mb
b. Set Swap to same size as memory in the server (we used 6GB)
c. Set root to remainder of space and use reiser

Once you install SLES, patch. Get everything working fine first. Then install OES2. Once that is patched, then use iManager to make your activate the logical drive which is unconfigured space this far and make your NSS volumes with iManager or nssmu.

By the way, we make one pool with 2 NSS volumes sharing the pool. One is for our GroupWise, which we configured without compression and the other is for our user/data/apps which is configured with compression and salvage.

Works like a champ...

HTH

--El

El LaGrew elbert.lagrew#katun.com elagrew on twitter
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jmarton2 Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

On Thu, 08 Oct 2009 17:46:02 +0000, elagrew wrote:

> Once you install SLES, patch. Get everything working fine first. Then
> install OES2.


I would not recommend this. There are various SLES10 patches which on
their own cause a problem with OES2, but when a server is running OES2 it
installs patches appropriately to address this (most of the time). If
you don't want to install OES2 as an add-on during SLES10 install time,
that's fine, but then make sure to add OES2 on prior to installing any
patches.



--
Joe Marton
Novell Knowledge Partner
SUSE Linux Enterprise 11 is ready for action.

Joe Marton Emeritus Knowledge Partner
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jshorr Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

elagrew;1869279 wrote:
We are in the process of migrating as well. Here is what I did.

1. Create two Logical drives in IBM raid manager.
a. One 40GB raid 5 drive for os
b. The rest of the space as raid 5 for NSS volumes
c. Set both drives to 64 KB stripe
2. Use latest DVD for SLES 10
a. Do not select the “add on media option” at this time. We will do OES later
b. Set hardware clock to Local Time. Default is UTC.
3. Use advanced/custom partitioning to select the 40GB drive for the SLES install
a. Set Boot to 500mb
b. Set Swap to same size as memory in the server (we used 6GB)
c. Set root to remainder of space and use reiser

Once you install SLES, patch. Get everything working fine first. Then install OES2. Once that is patched, then use iManager to make your activate the logical drive which is unconfigured space this far and make your NSS volumes with iManager or nssmu.

By the way, we make one pool with 2 NSS volumes sharing the pool. One is for our GroupWise, which we configured without compression and the other is for our user/data/apps which is configured with compression and salvage.

Works like a champ...

HTH

--El


Thanks for the tips. What did you base the 500MB boot and 64K stripe on.
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MarcelCox Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

elagrew wrote:

>a. Do not select the “add on media option” at this time. We will do
>OES later


I would recommend the opposite for 2 reasons:

1) Including the OES2 CD at installation time will prevent you from
installing incompatible SLES options that could cause issues later on

2) While so far with for OES2SP1, this hasn't been an issue, for OES2FCS,
the patching process was badly broken in the sense that at a certain time,
once you patched SLES, you could no longer install OES2 on top of it.
Given the very bad history of patch issues for OES2, I certainly wouldn't
trust Novell to not create the same problem again.

--
Marcel Cox
http://forums.novell.com
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Anonymous_User Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

Ok - I have 2 sles/oes servers so far, and worked with a novell tech on one issue where I had to reinstall the OS. He told me to get SLES and its updates working. Then do OES at a later time. But I had many issues doing it this way. Many things on OES were broken, etc. Long story short, I will be taking the above advice on my next migration.

Regarding patching - How can I find out exactly which ones I need for my system. I click on the patch, read it, and say WTH, might as well? but maybe more is not better in this case? Its very hard to know which ones to choose.
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jshorr Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

jmarton;1869164 wrote:
On Thu, 08 Oct 2009 15:26:02 +0000, jshorr wrote:

> Thank you Joe. So if I could ask a quick follow-up, what would you
> recommend on say a fairly modern HP server with 4GB memory? I am
> clearly a linux beginner, you're saying I don't need to create all these
> different partitions that Novell mentions on Page 43, and just leave it
> all as the / partition right?


Well other than a separate partition for swap, yeah. Some people like
having /opt, /var, /tmp, etc on their systems so that if one of those
locations fills up it doesn't fill up the root filesystem. I haven't
done that yet, though.

> Maybe it's overkill but I am thinking
> maybe 32GB would be a good number for the system logical drive, that's
> pretty much what I do for a Windows System at this point... thanks.


Sounds good.



--
Joe Marton
Novell Knowledge Partner
SUSE Linux Enterprise 11 is ready for action.


Do you think a BOOT partition is necessary?
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Marcel_Cox Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

StacieWhite wrote:

>Regarding patching - How can I find out exactly which ones I need for
>my system. I click on the patch, read it, and say WTH, might as well?
>but maybe more is not better in this case? Its very hard to know which
>ones to choose.


You register your server with the activation codes and you install all
patches that are selected by default (those are the "required" patches).

--
Marcel Cox
http://support.novell.com/forums
------------------------------------------------------------------------
Marcel Cox's Profile: http://forums.novell.com/member.php?userid=8
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jmarton2 Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

On Fri, 09 Oct 2009 22:36:02 +0000, jshorr wrote:

> Do you think a BOOT partition is necessary?


Absolutely necessary, no, but is it a good idea? Sure, especially with
larger logical/physical devices.



--
Joe Marton
Novell Knowledge Partner
SUSE Linux Enterprise 11 is ready for action.

Joe Marton Emeritus Knowledge Partner
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Knowledge Partner Knowledge Partner
Knowledge Partner

Re: question on raid logical volumes, partitions

jshorr wrote:


> Thank you Joe. So if I could ask a quick follow-up, what would you
> recommend on say a fairly modern HP server with 4GB memory? I am
> clearly a linux beginner, you're saying I don't need to create all
> these different partitions that Novell mentions on Page 43, and just
> leave it all as the / partition right? Maybe it's overkill but I am
> thinking maybe 32GB would be a good number for the system logical
> drive, that's pretty much what I do for a Windows System at this
> point... thanks.


I prefer to at least partition /var for the exact reason that Joe
points out. Also, if a file system would get corrupt you would loose
your whole server if you have multiple partitions.

--
Cheers,
Edward
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jmarton2 Absent Member.
Absent Member.

Re: question on raid logical volumes, partitions

On Mon, 12 Oct 2009 23:12:28 +0000, Edward van der Maas wrote:

> Also, if a file system would get corrupt you would loose your whole
> server if you have multiple partitions.


Don't you mean you *won't* lose the whole server if you have multiple
partitions?



--
Joe Marton
Novell Knowledge Partner
SUSE Linux Enterprise 11 is ready for action.

Joe Marton Emeritus Knowledge Partner
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Knowledge Partner Knowledge Partner
Knowledge Partner

Re: question on raid logical volumes, partitions

Joseph Marton wrote:


> Don't you mean you won't lose the whole server if you have multiple
> partitions?


sigh....typo number 300 this week

--
Cheers,
Edward
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