Re: would people mind a slow osd restart during luminous upgrade?

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On Thu, 9 Feb 2017, George Mihaiescu wrote:
> Hi Sage,
> 
> Is the update running in parallel for all OSDs being restarted? 
> 
> Because 5 min per server is different than 150 min when there are 30 
> OSDs there..

In parallel.

sage

> 
> Thank you,
> George 
> 
> > On Feb 8, 2017, at 22:09, Sage Weil <sweil@xxxxxxxxxx> wrote:
> > 
> > Hello, ceph operators...
> > 
> > Several times in the past we've had to do some ondisk format conversion 
> > during upgrade which mean that the first time the ceph-osd daemon started 
> > after upgrade it had to spend a few minutes fixing up it's ondisk files.  
> > We haven't had to recently, though, and generally try to avoid such 
> > things.
> > 
> > However, there's a change we'd like to make in FileStore for luminous (*) 
> > and it would save us a lot of time and complexity if it was a one-shot 
> > update during the upgrade.  I would probably take in the neighborhood of 
> > 1-5 minutes for a 4-6TB HDD.  That means that when restarting the daemon 
> > during the upgrade the OSD would stay down for that period (vs the usual 
> > <1 restart time).
> > 
> > Does this concern anyone?  It probably means the upgrades will take longer 
> > if you're going host by host since the time per host will go up.
> > 
> > sage
> > 
> > 
> > * eliminate 'snapdir' objects, replacing them with a head object + 
> > whiteout.
> > _______________________________________________
> > ceph-users mailing list
> > ceph-users@xxxxxxxxxxxxxx
> > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
> 
> 
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