<html><head></head><body><div dir="auto">Steven is correct. But I would like to take you a step further in your thought process.<br><br></div>
<div dir="auto">There are many reasons to cluster machines, but but the conversation generally comes down to one of three big use cases:<br><br></div>
<div dir="auto"> 1) Increased compute capacity<br></div>
<div dir="auto"> 2) Redundancy<br></div>
<div dir="auto"> 3) Failover<br><br></div>
<div dir="auto">Open Stack which was previously mentioned is an open source project which was mentioned before is often used to provision clusters... it's not a cluster itself, but can help you manage them.<br><br></div>
<div dir="auto">Let's look at the three use cases I listed above.<br><br></div>
<div dir="auto">A cluster for Increased compute capacity generally takes a job (work to be done) and divides it into smaller units, then distributes it across multiple nodes. See Open MPI to get an idea.<br><br></div>
<div dir="auto">Another example of increased capacity could also be bringing web servers online or offline to match capacity. Think of AWS and ELB+Scaling Groups+Instances as an example of this.<br><br></div>
<div dir="auto">A cluster for redundancy allows programs to insure uptime by making multiple servers having the same task. Set up three web servers and shared storage (think NAS not shares), and use DNS round robin to create this type of cluster.<br><br></div>
<div dir="auto">Failover clusters keep server one taking requests and a heartbeat between it and a failover machine. If the heartbeat fails (primary machine stops respondong) begin transfering to the secondary machine.<br><br></div>
<div dir="auto">OpenStack, Kubernetes, and Cloud Foundry are all great tools for building clusters that can translate into experience employers want.<br><br></div>
<div dir="auto">Kevin Fries<br><br></div>
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<div class="gmail_quote" >On Apr 16, 2019, at 9:19 PM, Stephen Partington <<a href="mailto:cryptworks@gmail.com" target="_blank">cryptworks@gmail.com</a>> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div dir="ltr"><div class="gmail_default" style="font-family:trebuchet ms,sans-serif">this depends on what you want it to be doing. you can do something with OpenStack and that technically is a cluster. or you could get old school and look into beowolf clusters.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Apr 16, 2019 at 7:42 PM Harold Hartley <<a href="mailto:wheelie207@ownmail.net">wheelie207@ownmail.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u><div><div style="font-family:Arial">I’m looking at building a cluster and I know there are different types. I haven’t fully decided on what I would be using it for.<br></div><div style="font-family:Arial">Well, I have 4 computers about 3 or 4 years old and all have i5 processing with 8 gigs ram in each. I am not sure what size hard drives I want in them. I am looking at doing animations making my own small video movie like and then post on my blog. Even thought of other uses as well.<br></div><div style="font-family:Arial">Would anyone have an idea what type of cluster I should go with. Thanks</div><div style="font-family:Arial"><br></div><div id="gmail-m_-7858980220694947809sig4468849"><div class="gmail-m_-7858980220694947809signature">--<br></div><div class="gmail-m_-7858980220694947809signature"> Harold Hartley<br></div><div class="gmail-m_-7858980220694947809signature"> 17632 N. 5th place<br></div><div class="gmail-m_-7858980220694947809signature"> Phoenix, AZ 85022<br></div><div class="gmail-m_-7858980220694947809signature"> <a href="mailto:wheelie207@ownmail.net" target="_blank">wheelie207@ownmail.net</a><br></div><div class="gmail-m_-7858980220694947809signature"><br></div></div><div style="font-family:Arial"><br></div></div>---------------------------------------------------<br>
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