<html><head><style>body{font-family:Helvetica,Arial;font-size:13px}</style></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;"><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">As a follow up on this topic, the specification for this change has been proposed to the openstack-specs (cross-project) specifications repository: <a href="https://review.openstack.org/#/c/152337/">https://review.openstack.org/#/c/152337/</a></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">Feedback from the operators would be greatly appreciated.</div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;"><br></div><div id="bloop_customfont" style="font-family:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height: auto;">—Morgan</div> <br> <div id="bloop_sign_1423419516962118144" class="bloop_sign"><div style="font-family:helvetica,arial;font-size:13px">-- <br>Morgan Fainberg<br></div></div> <br><p style="color:#000;">On January 30, 2015 at 11:41:02 AM, Jesse Keating (<a href="mailto:jlk@bluebox.net">jlk@bluebox.net</a>) wrote:</p> <blockquote type="cite" class="clean_bq"><span><div><div></div><div>On 1/30/15 11:37 AM, Tim Bell wrote:
<br>> Any ideas how are the online upgrade teams looking to address this ? Not an easy problem to solve.
<br>
<br>The direction is additive migrations. Create new columns and tables for
<br>new place for the data, but support pulling data from old locations as
<br>well. Once all the consumers/producers can read the new table,
<br>background data migration starts. Eventually the old tables can be
<br>dropped, but that can be an admin action later.
<br>
<br>Expand / contract is the term being throw around for this.
<br>
<br>Of course, each project is tackling it on their own, and I'm mostly
<br>speaking about Nova.
<br>
<br>--
<br>-jlk
<br>
<br>_______________________________________________
<br>OpenStack-operators mailing list
<br>OpenStack-operators@lists.openstack.org
<br>http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
<br></div></div></span></blockquote></body></html>