<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div>On Jan 22, 2009, at 4:12 AM, Gareth Glaccum wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Bitstream Vera Sans'; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><div><div style="font-family: 'times new roman', 'new york', times, serif; font-size: 12pt; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; ">I was intending on upgrading my backend for mythtv. Unfortunately this box is on a F7 OS and is thus getting out of date.<span class="Apple-converted-space"> </span><br>This box also performs a webservice and diskless boot services for some of the machines.<span class="Apple-converted-space"> </span><br>I have one other machine which is used as a front-end, with disk, which would be powerful enough to be a backend temporarily (but not diskless boot server I think), and two machines without disks which are used as frontends.<span class="Apple-converted-space"> </span><br><br>I was intending to upgrade to F10 on the downstairs machine with disks, then install svn/trunk, check that everything worked, transfer the database and storage to this machine, then upgrade the server with F10 and svn/trunk, sort out the webserver etc. then transfer everything back again.<span class="Apple-converted-space"> </span><br><br>I looked through the howtos on transfering from one host to another and as such this seemed like a feasable upgrade path.<span class="Apple-converted-space"> </span><br><br>The snag comes, in that the F7 version of myth is I think 0.21, and svn is 0.22. Even loading a front-end up starts to try and make an upgrade to the database. (personally an auto-upgrade is fine, but should be performed by a backend service only, not a frontend. What would happen if someone with a Upnp frontend on their laptop plugged into a backend network [badly configured with the default mythtv@mysql u/p available to all dhcp hosts], it would upgrade the backend database possibly to the point where the backend crashes).<br><br>So my question is (and I think there are more people likely to have done a staged upgrade on this list), will the 0.22 upgrade crash the backend (I thiny yes). Can anyone suggest a suitable (less stressy downtime...) upgrade pattern here?<span class="Apple-converted-space"> </span><br><br>I want to stick with Fedora / Redhat based real OS, and would like to go to trunk, as if I ever get any free-time I want to start to dabble again.</div></div></div></span></blockquote></div><div><br></div><div>It sounds to me like instead of going to trunk you want to check out the -fixes branch and build from that so you're still at 0.21 and have a stable system. Then when you get that free time, you can easily upgrade to the trunk branch.</div><div><br></div><div>The bottom line is that you can never mix versions of MythTV. If you want to use 0.21-fixes, use it on all machines. If you want to try you hand with trunk, it must be on all machines. You should just get a protocol mismatch error if you try to run trunk fronend against 0.21-fixes backend. If it's actually performing an upgrade then that is wrong behavior.</div><div><br></div><div>-Brad</div><div><br></div></body></html>