Question

I’d like to use Matlab with EC2, its basically an embarrassing parallel problem so I don’t necessarily need the parallel toolbox.

Reading the blog here:

http://aws.typepad.com/aws/2008/11/parallel-comput.html

The link to the white paper, actually takes you to a webpage where it says that the service is only available in USA and Canada (I’m UK based) but that you can register your interest.

Moreover it seems there may be an issue with licences? If I have to buy a new license for each CPU its a non starter for me.

My program doesn’t really use any big MATLAB function like lsqmin, so in theory it should be easily convertible to Octave (I think).

If using Matlab with EC2 is not possible for any of the reasons above can anyone tell me how to use Octave with EC2?

function [output]=DElambda(de,data,OF)

 P1=zeros(de.d,de.nP);
 Pu=zeros(de.d,de.nP);

 for i=1:de.d
 P1(i,:)=de.min(i,1)+(de.max(i,1)-de.min(i,1))*rand(de.nP,1);
 end


 P1(:,1:de.d)=diag(de.max);
 P1(:,de.d+1:2*de.d)=diag(de.min);


 for i=1:de.nP
 betas(:,i)=NSS_betas(P1(:,i),data);
 end

 Params=vertcat(betas,P1);

 Fbv=NaN(de.nG,1);
 Fbest=realmax;



 F=zeros(de.nP,1);
 P=zeros(de.nP,1);


for i=1:de.nP 

F(i)=OF(Params(:,i)',data);

P(i)=pen(P1(:,i),de,F(i));
F(i)=F(i)+P(i);


 end

 [Fbest indice] =min(F);
 xbest=Params(:,indice);


Col=1:de.nP; 

for g=1:de.nG
P0=P1;
rowS=randperm(de.nP)';
colS=randperm(4)';
RS=circshift(rowS,colS(1));
R1=circshift(rowS,colS(2));
R2=circshift(rowS,colS(3));
R3=circshift(rowS,colS(4));

%mutate
Pm=P0(:,R1)+de.F*(P0(:,R2)-P0(:,R3));
%extra mutation
if de.R>0 
    Pm=Pm+de.r*randn(de.d,de.nP);
end

%crossover
PmElements=rand(de.d,de.nP)<de.CR;
%mPv(MI)=mP(Mi);
if de.oneElementfromPm
   Row=unidrnd(de.d,1,de.nP);
   ExtraPmElements=sparse(Row,Col,1,de.d,de.nP);
   PmElements=PmElements|ExtraPmElements;
end

P0_Elements=~PmElements;
Pu(:,RS)=P0(:,RS).*P0_Elements+PmElements.*Pm;
%%%need to add penalty!!!!!!!!!!!!
%select vector to enter next generation

for i=1:de.nP
betasPu(:,i)=NSS_betas(Pu(:,i),data);
end



ParamsPu=vertcat(betasPu,Pu);
flag=0;
for i=1:de.nP
    %for j=1:dates
    %Ftemp=feval(OF,Pu(:,i)',data,j);
    Ftemp=OF(ParamsPu(:,i)',data);
    %end
    %Ftemp=OF(Pu(:,i),data);
    Ptemp=pen(Pu(:,i),de,F(i));
    Ftemp=Ftemp+Ptemp;

    if Ftemp<=F(i);
        P1(:,i)=Pu(:,i);
        F(i)=Ftemp;
        if Ftemp < Fbest
        Fbest=Ftemp; xbest=ParamsPu(:,i); flag=1;
        end
    else
        P1(:,i)=P0(:,i);
    end    
end

if flag
    Fbv(g)=Fbest;
end

end

output.Fbest=Fbest; output.xbest=xbest; output.Fbv=Fbv;
end



 function penVal=pen(mP,pso,vF)

minV=pso.min;
maxV=pso.max;
ww=pso.ww;

A=mP-maxV;
A=A+abs(A);

B=minV-mP;
B=B+abs(B);

C=ww*((mP(1,:)+mP(2,:))-abs(mP(1,:)+mP(2,:)));
penVal=ww*sum(A+B,1)*vF-C;


end

Answer 1

One idea that doesn’t require additional licenses would be to deploy the MATLAB Compiler Runtime (MCR) on your EC2 instances. Then use the MATLAB Compiler to create executables of your code and run them on those EC2 instances.

The MCR is provided with MATLAB Compiler for distribution with your
application and can be deployed royalty-free.

If you want to take this approach further, consider running a local job-queue that distributes work across available EC2 instances. This seems to be a nice write-up on how to do so.