How to Use Multithreading script

Question

I found this Multithreading script at http://www.get-blog.com/?p=189

Param($Command = $(Read-Host \"Enter the script file\"), 
    [Parameter(ValueFromPipeli         


        

Answer 1

You can ping hosts asynchronously with [System.Net.NetworkInformation.Ping], no need to go crazy with runspaces. Moreover it will ping the host once, so it will be way much faster than test-connection. Below is a sample for a batch of hosts (about 90). I guess it's not a good idea to load 100K at once, probably split it in smaller batches and do one by one.

$hosts = "www.facebook.com,www.twitter.com,www.youtu.be,www.google.com,www.youtube.com,www.instagram.com,www.linkedin.com,www.pinterest.com,www.wordpress.com,www.blogspot.com,www.apple.com,www.adobe.com,www.tumblr.com,www.amazon.com,www.vimeo.com,www.flickr.com,www.microsoft.com,www.yahoo.com,www.godaddy.com,www.qq.com,www.vk.com,www.reddit.com,www.baidu.com,www.nytimes.com,www.buydomains.com,www.wp.com,www.statcounter.com,www.jimdo.com,www.blogger.com,www.github.com,www.weebly.com,www.soundcloud.com,www.myspace.com,www.addthis.com,www.theguardian.com,www.cnn.com,www.stumbleupon.com,www.gravatar.com,www.digg.com,www.addtoany.com,www.creativecommons.org,www.paypal.com,www.yelp.com,www.imdb.com,www.huffingtonpost.com,www.feedburner.com,www.issuu.com,www.wixsite.com,www.wix.com,www.dropbox.com,www.forbes.com,www.amazonaws.com,www.washingtonpost.com,www.bluehost.com,www.etsy.com,www.go.com,www.msn.com,www.wsj.com,www.weibo.com,www.fc2.com,www.eventbrite.com,www.parallels.com,www.ebay.com,www.livejournal.com,www.reuters.com,www.taobao.com,www.typepad.com,www.bloomberg.com,www.elegantthemes.com,www.eepurl.com,www.usatoday.com,www.about.com,www.medium.com,www.macromedia.com,www.xing.com,www.bing.com,www.time.com,www.tripadvisor.com,www.aol.com,www.constantcontact.com,www.latimes.com,www.list-manage.com,www.webs.com,www.opera.com,www.live.com,www.bandcamp.com,www.bbc.com,www.businessinsider.com,www.dailymotion.com,www.cpanel.com,www.disqus.com,www.sina.com.cn,www.spotify.com,www.wired.com,www.googleusercontent.com"
$hosts = $hosts -split ","

$tasks = @{}
foreach ($h in $hosts) { $tasks[$h] = [System.Net.NetworkInformation.Ping]::new().SendPingAsync($h)}

Write-Host "Waiting for batch is completed" -NoNewline
while($false -in $tasks.Values.IsCompleted) {sleep -Milliseconds 300; Write-Host "." -NoNewline}

$result = foreach($h in $hosts) {
$r = $tasks[$h].Result
[PSCustomObject]@{
 host = $h
 address = $r.Address.IPAddressToString
 status = if($r.Address.IPAddressToString){$r.Status}else{"Failed"}
 time = $r.RoundtripTime
 bytes = $r.Buffer.Count
 ttl = $r.Options.Ttl
  }
}


$result | Format-Table -AutoSize