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centos_hortonworks [2016/04/20 09:21]
steve 		centos_hortonworks [2016/04/26 09:15]
steve
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 At the boot menu, hit Tab, and add ''​text''​ to the kernel options. At the boot menu, hit Tab, and add ''​text''​ to the kernel options.
  
-** Disk partitioning **+Alternatively,​ you can do a [[CentOS Kickstart|kickstart]] install. 
 + 
 +** Disk partitioning ​and filesystems ​**
  
 Hadoop comes with some recommendations for setting up the filesystem Hadoop comes with some recommendations for setting up the filesystem
  
-  * Don't use LVM +  * Don't use LVM to manage partitions 
-  * No swap partition or disable it in ''​sysctl.conf''​+  * Either do not install ​swap partition or set ''​vm.swappiness''​ to 0 in ''​sysctl.conf''​
   * Set the ''​noatime''​ flag for the partitions   * Set the ''​noatime''​ flag for the partitions
   * Use ext3 or ext4 as the filesystem type   * Use ext3 or ext4 as the filesystem type
-  * Disable root reserved amount ​+  * Disable root reserved amount
  
-Since HDFS works across ​partitions, ​I keep it simple ​and have only one partition.+Using the text installer, your partitions ​are set up automatically. It will install a swap partition, and a separate ​one for the boot loader.
  
 You'll only get an option to partition the drives through the GUI install. So in these cases of a text one, it'll auto-format,​ use LVM, and create an ext4 filesystem for root. You'll only get an option to partition the drives through the GUI install. So in these cases of a text one, it'll auto-format,​ use LVM, and create an ext4 filesystem for root.
 +
 +Set ''​vm.swappiness''​ to 0 in ''/​etc/​sysctl.conf'',​ and apply it to the running system. This will let the kernel use swap only if something is going to OOM.
  
 ** DHCP request ** ** DHCP request **