Large copy/write on btrfs cache pool locking up server temporarily
Hi,
I have a btrfs cache pool of 4 ssd drives, which hosts the docker image as well as downloaded data. I noticed that some of the docker apps were occasionally having issues like "database locked" and "write error, disk full?", etc.
After thorough testing, I realized that whenever there is a large file transfer on the cache pool, where the file is read from and written to the cache drive, the server temporarily locks up. The unraid gui is unreachable, the docker apps sta
I have a theory on why some users may be having this issue, if anyone wants to try and post if there was an improvement please do.
Currently fstrim on btrfs is only trimming the unallocated space, this is apparently a bug but it's been like this for some time, for some users with a large slack on the filesystem this will be a very small area of the SSD leaving all unused but allocated space untrimmed, this can lead to very poor performance, so first check for slack on the filesystem,
