[ngw] GMS + SLES + HyperV

James Taylor james.taylor at eastcobbgroup.com
Thu Apr 4 18:40:04 UTC 2019


If you look at best practices regarding use of btrfs, you will see that it doesn’t play well as a file system supporting a database.
As others have noted, btrfs journaling is not a good fit for the magnitude of writes in most database installations.
-jt


> On Apr 3, 2019, at 10:05 PM, Scott Malugin <smalugin at dcbe.org> wrote:
> 
> Why is BTRFS not supported it is the default file system for SLES? I
> miss that on one of my GMS systems, so far it is running fine. What if
> any problem could I see out of it running on BTRFS?
> 
> Scott E. Malugin
> Dickson County Schools
> Network & Systems Admin
> Voice # 615-740-5902
> E-Mail : smalugin at dcbe.org
> 
> 
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>>>> Pam Robello <pkrobello at gmail.com> 4/3/2019 7:00 PM >>>
> One last little tidbit from me....GMS is not supported running on a
> BTRFS
> file system.  We recommend EXT4 for SLES 12 and 15
> 
> Pam
> 
> On Wed, Apr 3, 2019 at 4:33 PM Matt Weisberg <matt at weisberg.net>
> wrote:
> 
>> 
>> I'll just chime in here too and mention that I have another site that
> was
>> running multiple GMS servers under Hyper-V (both SLES 11 and 12) for
> many
>> years with no issues at all (I say was because they migrated to
> Office 365
>> this past December).  This site had well over 50 SLES VMs (several GW
> POs)
>> running in 2 different large Hyper-V clusters, so I can attest that
> SLES
>> 11, 12 and 15 all run fine under Hyper-V as well.
>> 
>> I'll echo Joe's comment to make sure the Hyper-V integration tools
> are
>> loaded (included in the SLES distro).  I also do typically use the
> kernel
>> option elevator=noop for these VMs too.
>> 
>> As for file systems, I've run ext 2, 3, 4, btrfs, xfs, and nss all
> under
>> Hyper-V without issue.
>> 
>> The SLES support folks may be of more help on this one though, so
> that may
>> be a route to take.
>> 
>> All that said, I still prefer VMWare!  Hyper-V is a confusing mess to
> me!
>> 
>> Matt
>> 
>> 
>> --
>> Matt Weisberg
>> Weisberg Consulting, Inc.
>> matt at weisberg.net
>> www.weisberg.net
>> ofc. 248.685.1970
>> cell 248.705.1950
>> fax 248.769.5963
>> 
>> 
>> On 4/3/19, 11:56 AM, "ngw-bounces+matt=weisberg.net at ngwlist.com on
>> behalf of Joseph Marton" <ngw-bounces+matt=weisberg.net at ngwlist.com
> on
>> behalf of jmmarton at gmail.com> wrote:
>> 
>> 	 Also make sure the Hyper-V integration tools are enabled for
> the SLES
>> guest.
>> 
>> 
>> 
> https://docs.microsoft.com/en-us/windows-server/virtualization/hyper-v/supported-suse-virtual-machines-on-hyper-v
> 
>> 
>> 	 Joe
>> 
>> 	 On Wed, Apr 3, 2019 at 10:36 AM Bruce Perrin <
>> Bruce.Perrin at lbb.texas.gov>
>> 	 wrote:
>> 
>> 	 > Marvin,
>> 	 >
>> 	 > Are they doing anything 'special' with the VM ( replicating,
> doing
>> 	 > backups, etc) ? I mean, we have had 3 GMS hosts up on HyperV
> since
>> gms
>> 	 > first came out with no issues that weren't caused by me.
>> 	 >
>> 	 > What version of Windows Server are they running? What version
> of
>> SLES?
>> 	 >
>> 	 > -bruce
>> 	 > >>> <pkrobello at gmail.com> 4/3/2019 10:21 AM >>>
>> 	 >
>> 	 > Hi Marvin,
>> 	 >
>> 	 > This does not appear to be a GMS issue however this is a
>> configuration
>> 	 > that our test teams are not familiar with.  You will likely
> need to
>> work
>> 	 > with the SLES team if this happens again so they can
> determine what
>> the
>> 	 > problem is.
>> 	 >
>> 	 > Thanks,
>> 	 >
>> 	 > Pam
>> 	 >
>> 	 > >>> Marvin Huffaker<mhuffaker at redjuju.com> 4/2/2019 6:53 PM
>>>> 
>> 	 > I have a customer that is a Windows shop running on HyperV. 
> Twice
>> in the
>> 	 > last 6 months, their GMS system has gone corrupted beyond
> repair.
>> Meaning
>> 	 > on reboot it couldn't mount the file system and a manual
> fsck
>> resulted in
>> 	 > 100,000's of errors.   Needless to say, even after the
> repairs the
>> system
>> 	 > was trashed and I had to rebuild it from scratch.
>> 	 >
>> 	 > Is there something about SLES on HYPERV that makes it more
>> susceptible to
>> 	 > corruption?  I have never experienced this kind of issue
> running on
>> VMWARE.
>> 	 >
>> 	 > Thanks.
>> 	 >
>> 	 > Marvin
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