How to run a graceful shutdown of Distributed Cache Service instance before restarting the server

If you need to know how to run a graceful shutdown of a distributed cache service instance before restarting the server, with admin right, here is how :

Add-PSSnapin *   Use-CacheCluster Get-CacheHost Stop-SPDistributedCacheServiceInstance -Graceful   function Read_AFCacheStatistics { $AFCacheStatistics = Get-AFCacheHostStatus | % {                                                 $ServerName = $_.HostName.ToLower()                                                 $hostname = $env:COMPUTERNAME.ToLower()                                                 if ($ServerName -match $hostname)                                                            {                                                             Get-AFCacheStatistics -ComputerName $_.HostName -CachePort $_.PortNo | Add-Member -MemberType NoteProperty -Name 'ServerName' -Value $ServerName -PassThru                                                             }                                                 }    return $AFCacheStatistics.Size }   while (Read_AFCacheStatistics -ge 0) {                                     $Cache_Size = Read_AFCacheStatistics                                     Write-Host "Current cache size is: " -NoNewline; Write-Host $Cache_Size                                     }   Remove-SPDistributedCacheServiceInstance