Hello, switched storage driver to devicemapper (direct-lvm) and Discourse refuses to rebuild, why devicemapper option is filtered since it is one of the proper production setups. Do not confuse with loop-lvm, where loop devices are created in filesystem, they have terrible performance. The direct-lv…

No, because we don’t support devicemapper based on the large number of problems we’ve had with it in the past. If you’d like to skip that step for your install, you are welcome to do so of course.

Even issues with direct-lvm ? Can mention those issues ?

We had lots of issues with the standard out of the box devicemapper, so we block it by default. If you did your homework and is sure that your storage driver is up to the task, just add --skip-prereqs to the launcher command line.

Please report back here in say 2-3 months after say 5-10 rebuilds, I am very curious to see if this holds for you. Also be sure to post your exact version of Docker and Kernel with explanation on how you set up DM just-so.

Sure, will keep you updated. One moment I already found, by using software RAID 1 (mdadm) on plain sata disks with lvm gives performance degradation, uses a lot of cpu time for syncing. On 8 core system load average was 2-4, after the switch to btrfs on same RAID1, reduced the load to 1-2. But I k…

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Danpiel (Danpiel) 3 Giugno 2018, 8:03am 5

Thanks a lot for override flag, no pain for updating and backporting changes.

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