I struggled with a Live Backup issue on Ubuntu 2014 LTS a while ago as ralish from Stockholm DevOps describes here.
The problem was a broken installer meta package and ends up in a missing kvp deamon if you tried to install it on Ubuntu.
This daemon is used to interact between Host and VM to get a consistent backup state during snapshot creation on the Hyper-V Host.
So at the end, Backups without kvp can be risky due to a service interruption of the VM workload(s).
A screenshot from the DPM 2012 R2 Backup console shows the offline state.
In the meantime, the bug got fixed, Live Backups without service interruption can be taken, the sun is shining again and so it’s time to wrap some things up and give you a short overview about Hyper-V and common Linux Distributions.
It’s been a while since the dedup feature came to us with Server 2012.
Actually 2 years ago I started playing around and since then it’s one of my favourite features.
For testing purposes I have had deduped nearly everything I could and still use it in “unsupported” scenarios like non VDI environments.
I got quite an overview how rock solid this feature really is.
If you’re a SQL Server guy maybe it’s not a very surprising fact, but to me it is.
I’m using gMSAs since they were introduced with Server 2012 quite often and almost for SQL Server services.
I missed the older MSA – Managed Service Accounts (or standalone/sMSA as they known since last year) and never used them as they came along with Server 2008 R2.
But a couple of days ago, a blog entry came across, where one of the SQL team member said it’s actually not supported to use gMSA for SQL Servers, written on February 2014, hugh.
“DPM could not run the backup/recovery job for the data source because it is owned by a different DPM server. Data source: \Online\DC-01 Owner DPM Server: DPM-02.contoso.com. (ID 3184 Details: Internal error code: 0x809909B3)” Continue reading →
Sometimes i’m creating scheduled replication tasks because i’m still working on servers and systems or i have performance considerations.
Surprisingly often I’m finished earlier than expected and would like to start the postponed tasks as soon as possible.
But i couldn’t find DPM specific tasks within the task scheduler and starting the job with the usual way via GUI wasn’t helpful. Continue reading →
Server 2012 R2 fantaboulous dedup feature is one of my favourites.
But I had a mysterious error within the logs about “Not enough storage” which was definitely not true.
At the end the error message is misleading and it was to less memory at night times when the server tried to dedup his storage due to a rare condition with concurrent other VMs and dynamic ram. So it happend not often and the errors weren’t in my sight.
The Power Shell gave me this:
LastOptimizationTime : 24.06.2014 01:26:49 LastOptimizationResult : 0x8007000E LastOptimizationResultMessage : Not enough storage is available to complete this operation.
Getting more minimum memory and scaling up the weight solved the problem.
For the device-specific module (DSM) named Microsoft DSM, versions do not match between node CL-N01.contoso.com and node CL-N02.contoso.com. The Cluster validation of a couple of Servers 2012 R2 failed with VMM and the Failover Cluster Manager as well. Continue reading →