I'm using eCryptfs on top of ext4 on a Crucial C300 256GB SDD. For the first couple of months, I had the ext4 filesystem mounted with option discard and I was very disappointed by the performance. Specifically, in KMail, jumping through unread messages, stored in my eCryptfs HOME, was accompanied by a very disruptive lag. Listing a directory on the command line (ls) the first time had a similar lag.
SSDs are supposed to be fast, aren't they? I was resigned to accept this as the price I had to pay for encryption. A few weeks ago, triggered by another discussion, I mounted the ext4 fs without discard. The effect is extremely noticeable: there are no lags anymore, everything happens instantly. I gladly exchange this newfound speed for running fstrim every now and then. I haven't undertaken any measurements as I didn't need any more convincing. In particular, I can't say whether eCryptfs was at all implicated in the lags I observed. The bit of advice I have to offer is to try and mount the SSD without discard and see if the performance improves. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/654764 Title: writing to ecryptfs partition on SSD drive is many times slower than writing to unencrypted partition on the same drive To manage notifications about this bug go to: https://bugs.launchpad.net/ecryptfs/+bug/654764/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
