[Bug 1533639] Re: [ubuntu-cpc] please make /tmp a tmpfs in RAM
Dustin Kirkland
dustin.kirkland at gmail.com
Thu Jan 14 11:12:14 UTC 2016
** Description changed:
In Ubuntu, we clear /tmp on every boot.
As such, on servers, by default /tmp should actually be a tmpfs entirely
- in RAM.
+ in RAM, when there is enough memory in the system. This threshold
+ should be configurable by the end user (in cloud-init?), and default
+ threshold of ~2GB.
This has several advantages, mainly:
* Performance - much faster read/write access to data in /tmp
* Security - sensitive data would be cleared from memory on boot, rather than written (leaked) to disk -- important for encryption scenarios
* Power consumption - storing information in memory is more energy efficient than reading and writing to disk
In scenarios where more space in /tmp is needed than available, one can
compliment that tmpfs with 'sudo apt-get install swapspace' which will
dynamically create/delete swapfile as necessary.
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https://bugs.launchpad.net/bugs/1533639
Title:
[ubuntu-cpc] please make /tmp a tmpfs in RAM
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