<div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">On Thu, Jun 12, 2014 at 10:47 AM, Pranith Kumar Karampuri <span dir="ltr"><<a href="mailto:pkarampu@redhat.com" target="_blank">pkarampu@redhat.com</a>></span> wrote:<br>
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<div>On 06/12/2014 11:16 PM, Anand Avati
wrote:<br>
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<div class="gmail_quote">On Thu, Jun 12, 2014 at 10:39 AM,
Ravishankar N <span dir="ltr"><<a href="mailto:ravishankar@redhat.com" target="_blank">ravishankar@redhat.com</a>></span>
wrote:<br>
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<div>On 06/12/2014 08:19 PM, Justin Clift wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">On
12/06/2014, at 2:22 PM, Ravishankar N wrote:<br>
<snip><br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">But
we will still hit the problem when rolling upgrade
is performed<br>
from 3.4 to 3.5, unless the clients are also
upgraded to 3.5<br>
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Could we introduce a client side patch into (say)
3.4.5 that helps<br>
with this?<br>
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But the client side patch is needed only if Avati's server
(posix) fix is present. And that is present only in 3.5
and not 3.4 .</blockquote>
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The client can actually be fixed to be compatible with both
old and new servers. We can change the errno from ESTALE to
ENOENT before doing the GFID mismatch check in
client_lookup_cbk.</div>
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But this will require a two hop upgrade. Is that normal/acceptable?<br></div></blockquote><div><br></div><div>One hop is always better than two hops. But at least we have a way out. It is not at all unreasonable to have clients be of a minimum version for rolling upgrades to work (upgrade still works no matter what the client versions are if they are doing read-only access).</div>
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