OS X是否具有与/dev/shm等效的功能? [英] Does OS X have an equivalent to /dev/shm?

问题描述

OS X(尤其是Snow Leopard)是否具有与Linux的/dev/shm(某些版本)等效的功能，例如，您可以在不必接触硬盘驱动器的情况下写入和读取文件的东西?

Does OS X (Snow Leopard in particular) have an equivalent to (some versions of) Linux's /dev/shm , ie something where you can write to and read from a file without necessarily touching the hard drive?

推荐答案

您可以按照以下步骤创建和安装基于ram的磁盘:

You can create and mount a ram based disk as follows:

1. 创建磁盘

1. Create a disk

$ hdiutil attach -nomount ram://$((2 * 1024 * SIZE_IN_MB))

hdiutil将返回虚拟磁盘的名称.

hdiutil will return the name of the ramdisk.

格式化并装入磁盘

diskutil eraseVolume HFS+ RAMDisk NAME_OF_DISK

访问/Volumes/<diskname>

cd /Volumes/RAMDisk && touch testfile.txt && ls

创建一个100MB的虚拟磁盘:

Creating a 100MB ramdisk:

$ hdiutil attach -nomount ram://$((2 * 1024 * 100))
/dev/disk3

$ diskutil eraseVolume HFS+ RAMDisk /dev/disk3
Started erase on disk3
Unmounting disk
Erasing
Initialized /dev/rdisk3 as a 100 MB case-insensitive HFS Plus volume
Mounting disk
Finished erase on disk3 RAMDisk

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