On 02/07/2014 03:00 AM, sam tygier wrote:
Ubuntu will be using a cronjob that calls fstrim, not the discard mount option. They found that the discard option cause a small performance hit. https://blueprints.launchpad.net/ubuntu/+spec/core-1311-ssd-trimming
If you read the link you posted you will find that their discard testing is inconclusive. They only tested 2 SSDs.
The whole discard vs. fstrim debate is entirely speculation. I haven't seen any fs maintainer speak up on either side either. The debate has been limited to blog posters and vocal end-users with their opinions.
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