Tech Roundup - 31st December 2019

Stuff collated/new since Tech Roundup - 1st December 2019 with headings:

- Datadobi
- DevOps Books/Reading List
- NetApp
- Networking Fundamentals
- News
- Oracle
- Security
- Veeam

Datadobi - NAS Migration Software | Enterprise-Class Data Migration Software

DevOps Books/Reading List

Books available on Amazon:

The 2019 Accelerate State of DevOps: Elite performance, productivity, and scaling:

Site Reliability Engineering


NetApp (Check back often for new labs that will be added.)
Choose from these easy, no-cost ways to evaluate the features and functionality of NetApp products.
- Storage Tiering with FabricPool: Moving Cold Data from ONTAP to StorageGRID
- Enterprise Application Protection in the Data Fabric with ONTAP
- Understanding Trident: The Benefits of Persistent Storage on NetApp

NetApp Cloud (
Register for ANF (Azure NetApp Files):
“Performance so fast you’ll think you’re on premises. The powerful enterprise file storage service by Microsoft - Azure NetApp Files - delivers simplified data management and unmatched performance for Linux and Windows file-based applications.”

NetApp: Cloud Compliance for CVO Available Now!
“Cloud Compliance is now available for all NetApp Cloud Volumes ONTAP (CVO) customers. This new, free service empowers customers to take control of sensitive and personal data and support data privacy and compliance efforts. Cloud Compliance empowers CVO customers (ANF coming soon) to demonstrate compliance and automatically generate privacy and compliance reports across multi-cloud data in minutes. It runs in the background and has zero impact on data or operations, and it allows customers to map and identify sensitive data on their cloud in accordance with privacy regulations and generate data privacy compliance reports in seconds.”

NetApp Keystone

NetApp Blog (

NetApp TechONTAP Podcast (NetApp DevOps Community)

NetApp SnapCenter
From the ‘NetApp Data Broker 1.0.1 Data Protection Guide for VMs, Datastores, and VMDKs using the SnapCenter Plug-in for VMware vSphere’
Prerequisites for restoring guest files and folders:
Before you restore one or more files or folders from a VMDK on a Windows guest OS, you must be aware of all the requirements.
1) VMware Tools must be installed and running. SnapCenter uses information from VMware Tools to establish a connection to the VMware Guest OS.
2) The Windows Guest OS must be running Windows Server 2008 R2 or later.
3) The credentials for the target VM must specify the built-in domain administrator account or the built-in local administrator account. The username must be "Administrator." Before starting the restore operation, the credentials must be configured for the VM to which you want to attach the virtual disk. The credentials are required for both the attach operation and the subsequent restore operation. Workgroup users can use the built-in local administrator account. Attention: If you must use an account that is not the built-in administrator account, but has administrative privileges within the VM, you must disable UAC on the guest VM.

NetApp SnapCenter 4.3
Dec 12, 2019: NetApp SnapCenter Released
- Simplified SnapCenter High Availability (HA) Support:
SnapCenter can now work with external hardware load balancer f5 to provide HA capability in an active/passive mode configuration. With few simple cmdlets one can setup MySQL replication and enable HA for SnapCenter server.
- Concurrent upgrades of hosts:
You can now select multiple hosts and perform parallel upgrades of the hosts irrespective of the plugin type.

Mixed version support 9.1P19 -> 9.3 is allowed for a short duration.
> sysstat -x 1
> priv set advanced
> statit -b
> statit -e
> priv set
Also: sysstat -m, sysstat -M

NetApp Trident
Some use cases:
- Creating a shared PVC (PersistentVolumeClaim)
- Using snapshots for file recovery
- Dynamically resize a PVC
- Create instant clone of dataset

Image: Introducing Trident

Networking Fundamentals

[Video] 2011: Classless Interdomain Routing (CIDR)

[Video] 2010: Introduction to NAT and PAT Part 1

[Video] 2010: Introduction to NAT and PAT Part 2



Oracle have provided many performance gathering and reporting tools over the years. Originally the UTLBSTAT/UTLESTAT scripts were used to monitor performance metrics. Oracle 8i introduced the Statspack functionality which Oracle 9i extended. In Oracle 10g statspack has evolved into the Automatic Workload Repository (AWR).
Note: This functionality requires Enterprise Edition and the Diagnostics and Tuning option.


Unlike most ransomware strains, the Snatch ransomware also steals files from infected networks.

Cyber-security firm Emsisoft said it found a bug in Ryuk's decrypter app that makes file recovery impossible, even after paying the ransom demand.

OpenVPN, WireGuard, and IKEv2/IPSec VPNs are vulnerable to attacks!


A Veeam product I wasn’t aware of:

“Well after months of trying to get this worked out, I finally got Synology support to remote in and take a look. They were awesome and after combing through logs and wireshark files, they finally were able to change the setting "Do not reserve disk space when creating files" to checked instead of unchecked and it INSTANTLY increased my speed from 3MB/s to over 60 MB/s (90MB/s+ at some points).”