The GPFS portability layer (PL) is kernel-specific, and it must be created separately for each operating system level within your cluster.

GPFS 可移植层（PL）是内核特有的，必须为集群中的每个操作系统级别单独创建。

youdao

In DB2, users are created at operating system level.

在DB 2中，在操作系统级上创建用户。

youdao

Stripe the log across multiple disks at the operating system level.

在操作系统层将日志分放到多个磁盘。

youdao

Targeting at the operating system level will no longer be available.

FORBES: In Big Shift, Google Aims To Boost Mobile Ad Campaigns - And Its Own Revenues

VMware also benefits by creating even more demand for its cloud-level operating system, and staves off competitors that also want to create meta-server environments, like Microsoft.

FORBES: VMware's Cloud Platform- The New Developer Wars

All of this is possible because of virtualization, a process which increases effectiveness by inserting a level of software between the operating system and the hardware.

FORBES: Dell-EMC Relationship "On The Rocks" After Storage Acquisition