wafl.co.uk Report : Visit Site

Technical data of the wafl.co.uk

Geo IP provides you such as latitude, longitude and ISP (Internet Service Provider) etc. informations. Our GeoIP service found where is host wafl.co.uk. Currently, hosted in United States and its service provider is Xerox Corporation .

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DNS

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thoughts from a technical solutions architect home about me disclaimer ssh pre-shared keys windows linux esx contact sitemap switcher designed to fail march 26th, 2014 5 comments english: alan shepard in capsule aboard freedom 7 before launch—1961 alan shepard became the first american in space on may 5, 1961. he launched aboard his mercury-redstone 3 rocket named freedom 7–the suborbital flight lasted 15 minutes. (photo credit: wikipedia) i’m writing this a little bit for my wife and non-technical friends. as i was thinking through this idea it occurred to me that it’s not particularly technical, and it’s a great way of explaining what i spent a lot of my time doing when i’m actually designing solutions. recently both my wife and my phones have broken in various ways, she dropped hers and it’s never been the same since, mine just had some dodgy hardware failure and trying to fix it made it worse. the technology we buy is generally put together by the cheapest hardware provider, with the lowest cost commodity technology (not always the case, but largely true). mass production lowers costs, so does cutting corners and reducing redundancy (multiple components that are there solely to take over when one fails). in general home life most of us don’t bother with redundancy, some of us may have more than one desktop pc or laptop, but most of us will only have one personal phone, one big-screen tv, one blueray player, etc. etc. we buy commodity and we accept that it is a commodity and prone to failure. some of us don’t realise this and get upset when technology fails (perhaps a lot of us don’t realise this!), but when you remember that the technology you have isn’t necessarily the best (the best is expensive) but the cheapest, you’ll realise why it’s so prone to failure. this is why the home technology insurance industry is so strong! read more... (983 words, 6 images, estimated 3:56 mins reading time) general disaster recovery , failure , single point of failure , spof devops vs it-ops march 17th, 2014 1 comment i’ve spent the last few months closely monitoring the job boards, and because of my web development background i get flagged for development jobs. interestingly the vast majority of development roles seem to be pitched as devops roles. initially this got my interested as i’d be very interested in doing a devops role (my dev skills are rusty, but i can do the ops side pretty well). but it seems the majority of devops roles are simply just development roles with a bit of config management included, and the config management is code related, not infrastructure related. if you look at the it operations side of things, these guys are getting more involved in automated builds, infrastructure configuration management and the ubiquitous immutable server concept. the problem is there is significant cross-over in the tooling for devops and it-ops. if you’re looking at something like chef , puppet , ansible or salt , one of the key decision factors is are you a developer or an infrastructure person. developers are more likely to understand github repositories and workflows, while infrastructure guys will understand more scripting an automated build. with the major infrastructure virtualisation vendors coming to the party with things like vmware’s application director and data director , as well as microsoft’s app-controller , this market is quickly becoming busy. but the key question is still, are you a developer or an infrastructure person? either an infrastructure person is building a template to hand-over to development, or a developer is taking a pre-built template and automating their code over the top of it. what about devops then? at what point will the infrastructure operations team actually work closely with the development team? maybe the question is closer to: at what point will the infrastructure team let the development team get closer to the infrastructure, and at what point will the development team let the infrastructure team get closer to their code? there’s still too many arguments one way or the other (your code isn’t optimised for a virtual stack, your infrastructure isn’t dynamic enough for our code, etc. etc.). read more... (553 words, 6 images, estimated 2:13 mins reading time) general development , devops , infrastructure , it-ops , operations explain snapshots march 11th, 2014 9 comments this seems to be a popular search term so i think it’s worth covering off. this is covered on my old top post about fractional reservation , but i’ll cover the alternatives here also. netapp snapshots used to be pretty unique in the industry, but the industry term for this technology is generally now append-on-write / redirect-on-write (new writes are appended to the “end”, or redirected to free blocks, depending how you look at it) and quite a few vendors do it this way. put very simply, all new data is written to new (zeroed) blocks on disk. this does mean that snapshot space has to be logically in the same location as the production data, but that really shouldn’t be a problem with wide-striping / aggregates / storage pools (pick preferred vendor term). when a snapshot is taken, the inode table is frozen and copied. the inode table points to the data blocks, and these data blocks now become fixed. as the active filesystem “changes” blocks, these actually get written to new locations on disk, and so there is no overhead to the write (the new blocks are already zeroed). in other technologies (not netapp) this also forms the basis of automated tiering, once data is “locked” by a snapshot, it’ll never be over-written so it can safely be tiered out of ssd or even sas as read performance is rarely an issue. netapp use flashpools to augment this, and a snapshot is a trigger for data to be tiered out of flashpools as it’ll never be “overwritten”. read more... (894 words, 3 images, estimated 3:35 mins reading time) web searches append-on-write , copy-on-write , netapp , snapshot vmware cpu ready time march 11th, 2014 3 comments i have been surprised that recently this has come back to haunt me as an issue, and a major one at that. so what’s the issue? well, long story short, if you starve your virtual estate of cpu resources you’ll get cpu ready-state issues. broadly this is caused by 2 issues, you’ve over-committed your cpu resources (consolidation ratio is too high), or your virtual machines are sized too big (and their workload is too high). vmware vsphere is very clever with it’s cpu virtualisation. in order to allow multiple virtual machines share the same cpu space, it schedules them in and out. needless to say this happens very quickly, and generally speaking the only thing you’ll notice is that you consume very little cpu and have a very high consolidation ratio. the problem really occurs with large vms (4+ vcpu’s). vsphere needs to be a lot more intelligent about this, as all vcpu’s need to be scheduled at the same time, or skewed slightly (part of the relaxed co-scheduling in 5.0+). the window of opportunity to schedule these gets narrower the more vcpu’s you assign, so a 4 vcpu machine needs to wait for 4 logical cores to be available ( hyper-threaded cores count as individual logical cores), and 8 vcpu machine needs to wait for 8. the busier a vsphere host is, the longer a queue there may be for cpu resources and the harder it is to schedule all the vcpu’s is. while a machine is waiting for cpu resources to be available, it is in a ready-state (meaning it has cpu transactions to process, but can’t as no resources are available). the relaxed co-scheduling means it doesn’t always have to wait for all vcpu’s to be scheduled at the same time on logical physical cores, but it’s a rule of thumb when sizing. read more... (963 words, 4 images, estimated 3:51 mins reading time) general esxi , ready state , ready time , vmware , vsphere new beginnings march 11th, 2014 8 comments first new post in what, 2-3 years? wafl.co.uk still performs admirably and

URL analysis for wafl.co.uk

http://www.wafl.co.uk/tag/failover/index.html
http://www.wafl.co.uk/tag/n-series/index.html
http://www.wafl.co.uk/new-beginnings/trackback/index.html#comments
http://www.wafl.co.uk/category/geek-ontap/index.html
http://www.wafl.co.uk/about-me/trackback/index.html
http://www.wafl.co.uk/tag/deduplication/index.html
http://www.wafl.co.uk/ssh-pre-shared-keys/ssh-pre-shared-keys-for-linux/trackback/index.html
http://www.wafl.co.uk/tag/communities/index.html
http://www.wafl.co.uk/tag/infrastructure/index.html
http://www.wafl.co.uk/tag/environment/index.html
http://www.wafl.co.uk/vmware-cpu-ready-time/trackback/index.html
http://www.wafl.co.uk/tag/ontap/index.html
http://www.wafl.co.uk/tag/manual/index.html
http://www.wafl.co.uk/netapp-releases-flash-accel-1-3-0/index.html#respond
http://www.wafl.co.uk/tag/netapp/index.html

Whois Information

Whois is a protocol that is access to registering information. You can reach when the website was registered, when it will be expire, what is contact details of the site with the following informations. In a nutshell, it includes these informations;

Domain name:
wafl.co.uk

Registrant:
Chris Kranz

Registrant type:
UK Limited Company, (Company number: 8715935)

Registrant's address:
The Bungalow Wood Lane
Barston
West Midlands
B92 0JL
United Kingdom

Data validation:
Nominet was able to match the registrant's name and address against a 3rd party data source on 26-Aug-2015

Registrar:
Fasthosts Internet Ltd [Tag = LIVEDOMAINS]
URL: http://www.fasthosts.co.uk

Relevant dates:
Registered on: 08-Feb-2007
Expiry date: 08-Feb-2018
Last updated: 09-Jan-2017

Registration status:
Registered until expiry date.

Name servers:
ns-1418.awsdns-49.org
ns-1567.awsdns-03.co.uk 205.251.198.31
ns-195.awsdns-24.com
ns-828.awsdns-39.net

WHOIS lookup made at 11:42:45 04-Oct-2017

--
This WHOIS information is provided for free by Nominet UK the central registry
for .uk domain names. This information and the .uk WHOIS are:

Copyright Nominet UK 1996 - 2017.

You may not access the .uk WHOIS or use any data from it except as permitted
by the terms of use available in full at http://www.nominet.uk/whoisterms,
which includes restrictions on: (A) use of the data for advertising, or its
repackaging, recompilation, redistribution or reuse (B) obscuring, removing
or hiding any or all of this notice and (C) exceeding query rate or volume
limits. The data is provided on an 'as-is' basis and may lag behind the
register. Access may be withdrawn or restricted at any time.

  REFERRER http://www.nominet.org.uk

  REGISTRAR Nominet UK

SERVERS

  SERVER co.uk.whois-servers.net

  ARGS wafl.co.uk

  PORT 43

  TYPE domain

OWNER

  ORGANIZATION Chris Kranz

TYPE
UK Limited Company, (Company number: 8715935)

ADDRESS
The Bungalow Wood Lane
Barston
West Midlands
B92 0JL
United Kingdom
Data validation:
Nominet was able to match the registrant's name and address against a 3rd party data source on 26-Aug-2015

DOMAIN

  SPONSOR Fasthosts Internet Ltd [Tag = LIVEDOMAINS]

  CREATED 2007-02-08

  CHANGED 2017-01-09

STATUS
Registered until expiry date.

NSERVER

  NS-1418.AWSDNS-49.ORG 205.251.197.138

  NS-1567.AWSDNS-03.CO.UK 205.251.198.31

  NS-195.AWSDNS-24.COM 205.251.192.195

  NS-828.AWSDNS-39.NET 205.251.195.60

  NAME wafl.co.uk

DISCLAIMER
This WHOIS information is provided for free by Nominet UK the central registry
for .uk domain names. This information and the .uk WHOIS are:
Copyright Nominet UK 1996 - 2017.
You may not access the .uk WHOIS or use any data from it except as permitted
by the terms of use available in full at http://www.nominet.uk/whoisterms,
which includes restrictions on: (A) use of the data for advertising, or its
repackaging, recompilation, redistribution or reuse (B) obscuring, removing
or hiding any or all of this notice and (C) exceeding query rate or volume
limits. The data is provided on an 'as-is' basis and may lag behind the
register. Access may be withdrawn or restricted at any time.

  REGISTERED yes

Mistakes

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