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centos_hortonworks [2016/04/20 09:21] steve |
centos_hortonworks [2016/04/20 09:26] 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 ** | + | ** 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 and remove the | + | * Use ext3 or ext4 as the filesystem type |
+ | * 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. |