What is the correct way to update WSP and DLL in sharepoint 2013 farm?

Question

My farm sharepoint 2013 has 4 servers and my farm solution contains wsp and dll.

To correctly update the solution on sharepoint, do I need to enter each server and update the wsps and install the dlls on the gac?

I know the database is unique. So maybe it is only necessary to always update 1 server that will be replicated to the others? If yes, can it be any 1 or is there a principal?

Thanks

Answer 1

@Toriyama ,

Run following powershell in any server which runs two services(timer service and SharePoint Foundation Administration web service), other servers will be deployed automatically(Usually, these two services run on the WFE server).

Add-SPSolution -LiteralPath "C:\Solution\Qassas.wsp"  
Install-SPSolution –Identity Qassas.wsp –WebApplication http://Server/ -GACDeployment  

In addition,we can ran the following script to get the status of those two services for all SharePoint servers in farm:

$farm = get-spfarm    
$ss = $farm.Servers | ? {    
    $_.Role -notlike "Invalid"    
}    
foreach($s in $ss) {    
    $s.name    
    Write -host "........................."    
    $is = $s.ServiceInstances    
    foreach($i in $is) {    
        if ($i.TypeName -eq "Microsoft SharePoint Foundation Administration") {    
            $i.Typename    
            $i.status    
        }    
        if ($i.TypeName -eq "Microsoft SharePoint Foundation Timer") {    
            $i.Typename    
            $i.status    
        }    
    }    
}  

Outputs:

If you disable one of these two services on any server, remember to set it online.

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