Thanks a lot, Ian. Finally I get it right. I makes a few wrong assumptions about robustness and simplicity of general migrate procedure , consider btrees and objects references.
Thanks again, Dmitri On Wednesday 11 July 2007 22:18, Ian Eslick wrote: > Some documentation: > > http://common-lisp.net/project/elephant/doc/Repository-Migration-and- > Upgrade.html#Repository-Migration-and-Upgrade > > http://common-lisp.net/project/elephant/doc/Migration-and-Upgrading- > API.html#Migration-and-Upgrading-API > > > This is the safest route: > > Start lisp & load elephant: > > => (setf source-store (open-store '(:BDB "~/bdb/db-source"))) > => (setf target-store (open-store '(:BDB "~/bdb/db-result"))) > > => (migrate target-store source-store) > > Exit and restart lisp: > > => (open-store '(:BDB "~/bdb/db-result")) > > That's it! > > I recommend that you run a simple validation test: > - create a simple database > - populating it with a bunch of data, record the size > - delete 1/2 of the data randomly (or every other object) > - call (optimize-layout *store-controller*), record the compacted size > - do the migration as described above, record the resulting size > > I'm sure we'd love to see the three different sizes that result from > this simple test and I'm sure you'd feel better knowing that it works! > > Regards, > Ian > > On Jul 11, 2007, at 2:21 PM, Dmitri V. Gorbatovsky wrote: > > On Wednesday 11 July 2007 04:32, Ian Eslick wrote: > >> However, the best way to reclaim disk space today is to migrate from > >> your current BDB store to a new one. This will copy over only those > >> objects that are globally reachable; namely anything reachable from > >> the controller-root and all indexed instances. > > > > ... > > > >> If the documentation doesn't make this process clear, please write > >> back to us. > >> > >> Good luck, > >> Ian > > > > Thank you, Ian. > > Yes, I am afraid, I can't get it from the documentation. > > If it possible, could you please provide me with > > simple example of whole database migration from one directory > > ~/bdb/db-source to another ~/bdb/db-result. > > > > Thanks, Dmitri > > _______________________________________________ > > elephant-devel site list > > elephant-devel@common-lisp.net > > http://common-lisp.net/mailman/listinfo/elephant-devel > > _______________________________________________ > elephant-devel site list > elephant-devel@common-lisp.net > http://common-lisp.net/mailman/listinfo/elephant-devel _______________________________________________ elephant-devel site list elephant-devel@common-lisp.net http://common-lisp.net/mailman/listinfo/elephant-devel
