Create SharePoint 2010 Search Service Application Using Powershell

Question

Hi Team,
Could you please assist me in completing the search service application for
two server using powershell. Both the servers will be running all the component
Version SharePoint 2010
# 1.Setting up some initial variables.
write-host 1.Setting up some initial variables.
$SSAName = "Search Service Application"
$SVCAcct = "Domain\ServiceAccount"
$SearchAppPoolName ="DefaultAppPool"
$SSI = get-spenterprisesearchserviceinstance -local
$err = $null
$SSADBName="Search_AdminDB"
$SSADBServer="DBServer"
$host1="Server1"
$host2="Server2"
# Start Services search services for SSI
write-host Start Services search services for SSI
Start-SPEnterpriseSearchServiceInstance -Identity $SSI
# 2.Create an Application Pool.
write-host 2.Create an Application Pool.
#$AppPool = new-SPServiceApplicationPool -name $SSAName"-AppPool" -account $SVCAcct
$AppPool = Get-SPServiceApplicationPool -Identity $SearchAppPoolName -ErrorAction SilentlyContinue
# 3.Create the SearchApplication and set it to a variable
write-host 3.Create the SearchApplication and set it to a variable
$SearchApp = New-SPEnterpriseSearchServiceApplication -DatabaseServer $SSADBServer -Name $SSAName -applicationpool $AppPool -databasename $SSADBName
#4 Create search service application proxy
write-host 4 Create search service application proxy
$SSAProxy = new-spenterprisesearchserviceapplicationproxy -name $SSAName"ApplicationProxy" -Uri $SearchApp.Uri.AbsoluteURI
# 5.Provision Search Admin Component.
write-host 5.Provision Search Admin Component.
set-SPenterprisesearchadministrationcomponent -searchapplication $SearchApp -searchserviceinstance $SSI
# 6.Create a new Crawl Topology.
write-host 6.Create a new Crawl Topology.
$CrawlTopo = $SearchApp | New-SPEnterpriseSearchCrawlTopology
New-SPEnterpriseSearchCrawlComponent -SearchTopology $newTopology -SearchServiceInstance $hostA
Source:blog.MSDN Author- Russ Maxwell
Thanks Basva

Answer 1

Could you please assist me in completing the search service application for
two server using powershell. Both the servers will be running all the component 
Hi Basva,
Do you want to provision two search service applications in single farm?
Commonly, only one search service application is needed in a farm for Search function.
Here are articles for detail information about how to provision search service application using powershell:
http://blogs.msdn.com/b/jjameson/archive/2011/02/28/powershell-script-to-configure-search-in-sharepoint-server-2010.aspx
http://blogs.msdn.com/b/russmax/archive/2009/10/20/sharepoint-2010-configuring-search-service-application-using-powershell.aspx
Regards,
Rebecca Tu
TechNet Community Support
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