Hi Jonas, Great news! Fsync is useful but not in you scenario. I'm glad it worked for you.
Don't hesitate to come back of you have other questions. On Wed., Jun. 2, 2021, 4:56 a.m. Jonas Schöpf, <jonas.scho...@uibk.ac.at> wrote: > Hi! > > Thank you again for your help! > > With the "--no-fsync" argument, the backup succeeded after 13 minutes. > > Cheers, > Jonas > > On 6/1/21 9:53 PM, Jonas Schöpf wrote: > > Hi Patrik! > > > > On 6/1/21 4:48 PM, Patrik Dufresne wrote: > >> Hello Jonas, > >> > >> Welcome to rdiff-backup ! Let me try to help you a bit more with you > >> problem. > > Thanks :) > >> > >> First, the first backup always take alot of time because rdiff-backup is > >> not like a simple copy and alot of overhead are done in the background > >> to put in place the first version of the data. > >> > >> Second, with your use case of 400GB, I would not expect a very long > >> elapsed time for subsequent backup. I have a couple of backups with > >> similar size and it roughly takes ~10-20 minutes over the Internet with > >> 400Mbps. But you might not have the same setup as I do. > >> > >> If $HOME and $DRIVE are both local, It's quite simple to narrow the > problem. > >> > >> While running the backup with you command line, you might want to check > >> how the IO of your computer behaves. In the command line, try executring > >> `iostat -x -m 3` and take a look at the '%util' column. It displays the > >> percentage utilisation of the disk. If the value is near 90%, you have > >> found the culprit. The IO is your bottleneck. > >> > >> To help the situation, you might want to run the backup without fsync. > >> When Fsync is enabled, it forces the system to wait until the data is > >> written to the disk and persisted. For slow drives on USB, it may have a > >> huge impact on the performance. So try running rdiff-backup with > >> `--no-fsync`. > > > > Thank you for your help. > > Sounds like this is the problem! > > > > I will try your this tomorrow and report back if it works :) > > > > Thank you all for your help! > > > > Cheers, > > Jonas > > > > > > -- > GPG fingerprint: 0BF3 B30B F1D5 6556 795E F68F 8626 F794 FE62 BE1F > >
