Re: [libvirt] [PATCH] virstoragefile: identify GPFS as cluster FS

On 2/27/19 3:07 PM, Diego Michelotto wrote:

GPFS is 'IBM General Parallel File System', also called 'IBM Spectrum Scale', stalls when a process issues a lot of fsyncs in a short timeframe.

It is better if the VM I/O is not synchronous. It is racommended to use writeback caching policy.

Using writeback may lead to a data loss if qemu is killed on destination and underlying FS has not synced the data. Since I don't have GPFS I can't confirm it's behaving safely on migration. And I wasn't fortunate finding that on the internet either. Michal