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Sharing Linux Swap Partitions

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#1 pasha19


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Posted 15 January 2008 - 07:58 PM

I am running SuSE and Gentoo (up to 2 versions (old vs new for migration)) on the same box (old and slow) in multi boot mode. I want to share a swap file on the second drive between the three -- set for whichever one is booted. I assume I need to do a mkswap in the boot process to setup appropriately. /etc/init.d/boot.local does this too late on SuSE. I have no idea where to do this on Gentoo. In the same vein as a security measure how can the swap file be cleared on shutdown I saw a "dd /dev/random /dev/XXX9" (pardon syntax) that could clear the space if run at the appropriate time after a swapoff in the shutdown. Assuming the mkswap /dev/XXX9 can be done in the boot process. (This may be useful on the servers I am considering building.)

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#2 groovicus


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Posted 16 January 2008 - 09:52 AM

Yes, you can share swap partitions. In Gentoo, you would do it when you install the OS. Barring that, you just need to change your /etc/fstab file to point to the temp directory. Look at the one in Suse, and copy the parameter. That should work, but back up your fstab settings just in case.

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