Re: [atomic-devel] Fedora 26 change: using overlayfs as default

[Josh Berkus <jberkus redhat com>]

On 01/06/2017 11:24 AM, Vivek Goyal wrote:
> On Thu, Jan 05, 2017 at 04:16:45PM -0800, Josh Berkus wrote:
>> So, I've done some testing, thanks to Dusty's setup.
>>
>> I wasn't able to test on Kubernetes because of some setup issues.
>> However, I hammered away at Docker using some IO-intensive applications,
>> including PostgreSQL and Etcd, both of which write data frequently to
>> some unexpected places.
>>
>> So far I haven't seen any unexpected IO errors from containers running
>> under overlayfs.
>>
>> And having all of storage be one big volume is really nice; it
>> eliminates a longstanding issue we've had with disk allocation; the
>> whole disk is simply available.
>>
>> So +1 on moving to overlayfs for F26.
> 
> Nice to hear that Josh. BTW, on fedora server and atomic, overlay storage
> will still come from non-root fs partition. That will allow one to switch
> back to devicemapper if overlay2 does not work for them.

Why?  It didn't when I just ran the test.  Why can't we have a shared
partition?

-- 
--
Josh Berkus
Project Atomic
Red Hat OSAS