Does OS X have an equivalent to /dev/shm?

问题:

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?

回答1:

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

1. Create a disk

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

   hdiutil will return the name of the ramdisk.

2. Format and mount the disk

   diskutil eraseVolume HFS+ RAMDisk NAME_OF_DISK 

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 

Original source: http://www.frederico-araujo.com/2008/12/18/blazing-fast-firefox-using-osx-ramdisk/

文章来源: Does OS X have an equivalent to /dev/shm?