Ken Raeburn

There’s apparently been some discussion in the Stratis project about letting it manage complex storage stacks that export block devices; currently it only presents file systems. If they extend it...

> > It’s not clear to me what you’re trying to accomplish by using a single unified VDO storage device but separate encryption keys per volume. I expect this is...

On 2/9/23 09:55, x-star wrote: > @raeburn The kvdo 6.2 version hang my > system occasionally. My system runs 4.19 kernel. > The problem always occurs when reading a lot....

Hmm, this sounds like something new we haven’t seen. Is it hanging everything, or can you still issue commands to parts of the system not hung up waiting on I/O...

Does your VM sit on top of RAID storage, or networked storage, or anything else that might make flushing data to stable storage incur a significant latency? VDO is pretty...

nillin42: > > Does your VM sit on top of RAID storage, or networked storage, or anything else > > No. The constellation is: harddisk-->ext4-->qcow2-->vdo-->xfs (sdc is the device) >...

tigerblue77 wrote: > Should I stop using RAID controller's cache ? It’s worth experimenting. From what I’ve seen with basic write-back caching, the results could go either way. With a...

nillin42 wrote: > So I installed Rocky 8.5 on baremetal. VDO version 6.2.7.17. It really sucks. Bugs over bugs in Redhat. Incredible. I used a disk partition as LVM VDO...

Oh, I mis-spoke above... in the tests I did a couple years ago, it was btrfs that only flushes its data to disk every 30 seconds, not XFS.

Unfortunately, I think you’re probably looking at the best tools already. There’s no provision in VDO for accessing older versions of the content. If your file system isn’t mounted with...