Unaligned I/O can reduce storage performance un-necessarily, as it results in more I/O operations than necessary.
Whilst you can utilise performance policies, unless you need to, for the purpose of simplicity and avoiding the risk of errors, the general recommendation is to set all VMFS volumes to use the relevant Nimble ESXi performance policy (e.g. ESXi5).
Additionally create a copy of the ESXi5 policy but set it to not cache, and use that performance policy to create datastores to use exclusively for where there is no requirement for caching (i.
If you find that the PuTTY window closes itself after a few minutes of inactivity, there is a setting change you can make to prevent this.
When PuTTY starts, click on ‘Connection’ on the left hand side, then change the entry ‘Seconds between keepalives (0 to turn off) from the default of 0 to 5.
*Caveat: You will now require to manually close the connection, as PuTTY will send null packets to the host to prevent it timing PuTTY out due to inactivity - unless the host has a maximum session timeout or a loss of network connection.
How I got the gig In November 2015, a call for speakers went out to various people around Aberdeen, UK, for the largest IT event on the calendar, Oil & Gas ICT, hosted by Scot-Tech.
I had a story to tell, and lessons to share, and it was right in my own backyard, but I had never done a public speaking event before, sure plenty of presentations and whiteboard sessions within the confines of company walls, but not subject to public scrutiny by your peers.
The Scottish VMware User Group (VMUG) was held this November at Dynamic Earth in Edinburgh.
It was a great location, with floor to ceiling windows giving lots of natural light and just 15 minutes walk from the central train station.
(some) of what I learned - unmap - to free up space after storage vmotions and deletions, can be run on some storage arrays with no performance impact (check with the manufacturer how it behaves with your storage - I went back to the office and freed up 1TB of space).
Scenario: The guest WIFI cannot be connected to.
When you log onto the Cisco Wireless Lan (WLC) controller, under the mobility group status it shows a “Control Path Down”.
No other related outages are currently active, configuration changes have been not made on the WLC or to firewall rules (review if they have), and the guest WIFI has been operational previously.
Possible Solutions: 1) Log onto the firewall between the internal and DMZ WLC, locate the firewall active session table, search for sessions with source = the internal WLC IP Address & destination the anchor WLC IP address.
#VMunderground - “A series of panel sessions ‘by the community, for the community.'”
An impressive list of panelists discussing Storage, Automation, Data Protection, Infrastructure, Networking & Careers.
Even if you aren’t registered for VMworld, you can still watch them live here:
http://blog.vmunderground.com/live-stream/
Although I have vRealize Operations manager to tell me if my VMware cluster is getting stressed or not, I wanted to quickly check what the values in the vSphere client were telling me.
In the client, you can select to view different time intervals, realtime, past day, week, month & year, but as the summation calculation is different, to convert into a more useful % CPU ready value requires a formula.
