There’s a world below clouds and enterprise environments with thousands of VMs and hundered or thousands of hosts. A world that consists of maximal three hosts. I’m working with quite a few customers, that are using VMware vSphere Essentials Plus. Those environments consist typically of two or three hosts and something between 10 and 100 VMs. Just to mention it: I don’t have any VMware vSphere Essentials customer. I can’t see any benefit for buying these license.
On February 25, 2015 PernixData released the latest version of PernixData FVP. Even if it’s only a .5 release, FVP 2.5 adds some really cool features and improvements. New features are:
Distributed Fault Tolerant Memory-Z (DFTM-Z) Intelligent I/O profiling Role-based access control (RBAC), and Network acceleration for NFS datastores Distributed Fault Tolerant Memory-Z (DFTM-Z) FVP 2.0 introduced support for server side memory as an acceleration resources. With this it was possible to use server side memroy to accelerate VM I/O operations.
Yesterday I’ve updated a CentOS 6.6 VM with a simple yum update. A couple of packages were updated and to be honest: I haven’t checked which packages were updated. Today I noticed that an application, that uses a secure tunnel to connect to another application, doesn’t work. While browsing through the log files, I found this message from Stunnel.
LOG3[1145:140388919940864]: SSL_accept: 14076129: error:14076129:SSL routines:SSL23_GET_CLIENT_HELLO:only tls allowed in fips mode I rised the debug level and restarted Stunnel.
I’m a bit late, but better late than never. Some days ago I installed PernixData FVP 2.0 in my lab and I’m impressed! Until this installation, solutions such as PernixData FVP or VMware vSphere Flash Read Cache (vFRC) weren’t interesting for me or most of my customers. Some of my customers played around with vFRC, but most of them decieded to add flash devices to their primary storage system and use techniques like tiering or flash cache.
In my last blog post I have highlighted how HAProxy can be used to distribute client connections to two or more servers with Exchange 2013 CAS role. But there is another common use case for load balancers in a Exchange environment: SMTP. Let’s take a look at this drawing:
Patrick Terlisten/ vcloudnine.de/ Creative Commons CC0
The inbound SMTP connections are distributed to two Mail Transfer Agents (often a cluster of appliances, like Cisco IronPort or Symantec Messaging Gateway) and the MTAs forward the e-mails to the Exchange servers.
Some of my customers use TeamViewer to provide a quick access to their systems, without the need to configure VPN connections, install software on hosts etc. TeamViewer provides fast and secure access without the need to install software. Simply start the teamviewer.exe and choose if you want to connect to a host or use the session id and password to allow someone else access your computer. TeamViewer is free for all non-commercial users!
Disclaimer: I use a NFR license that was provided to me as a vExpert by code4ward free of charge.
I have searched for a relatively long time for a solution to manage multiple remote connections, like RDP, VNC or SSH. I tried different free tools, but none of them fulfilled my requirements, which are quite simple: Manage different connections & credentials. First I’ve tried Devolutions Remote Desktop Manager, which was quite good.
Nutanix was founded in 2009 and left the stealth mode in 2011. Their Virtual Computing Platform combines storage and computing resources in a building block scheme. Each appliance consists up to four nodes and local storage (SSD and rotating rust). At least three nodes are necessary to form a cluster. If you need more storage or compute resources, you can add more appliances, and thus nodes, to the cluster (scale out).
