Upgrade from < v1.6.5
Wed, 08/10/2011 - 09:23
Reading the upgrade instructions on http://www.couchbase.org/wiki/display/membase/Upgrading+to+Membase+1.7:
6. If your previous version was < 1.6.5 (such as 1.6.0, 1.6.1, 1.6.3), you will need to also run the following of manually creating a symbolic-link...
/etc/init.d/membase-server stop
mkdir -p /opt/membase/1.6.1
ln -s /var/opt/membase/1.6.1/data /opt/membase/1.6.1/data
/etc/init.d/membase-server start
My question: why is a symbolic link to the previous version necessary? Or, am I reading this incorrectly? This seems confusing.
It has to do with some of the hardcoding that those previous versions put into place...unfortunate, but necessary to ensure as seamless an upgrade as possible.
Once you've upgraded to 1.7.1 (or higher), you can consider rebalancing in new nodes and rebalancing out the old ones to get rid of any reference to older versions, but it's really just aesthetic.
Perry
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