Gentoo Archives: gentoo-amd64

From: Duncan <1i5t5.duncan@×××.net>
To: gentoo-amd64@l.g.o
Subject: [gentoo-amd64] Re: About to install on a 64 bit system. Advice wanted.
Date: Thu, 09 Dec 2010 10:02:55
In Reply to: Re: [gentoo-amd64] About to install on a 64 bit system. Advice wanted. by Dale
1 Dale posted on Wed, 08 Dec 2010 23:21:53 -0600 as excerpted:
3 > Alex Schuster wrote:
5 >> If you are running databases like mysql, you need to export the
6 >> databases and import them later. This is because they are in binary
7 >> format, and the datatypes are different in x86 and amd64 world.
9 > I don't have anything that I generated anyway. I have something
10 > installed that KDE pulled in if I recall correctly. I'll let KDE start
11 > off fresh tho.
12 >
13 > This does bring me to another thought tho. Would I be able to copy my
14 > /home directory over from a x86 system? I'm thinking I would but want
15 > to make sure.
17 In general, the same /home should be fine, 32-bit or 64-bit.
19 However, kde4 uses a database for akonadi. With older versions (thru 4.3
20 at least), it was mysql by default. Newer versions (from 4.5) use sqlite
21 by default, tho there can be a bit of an issue trying to upgrade as the
22 ebuild tries to default to sqlite, but the user config is still set to
23 mysql. If mysql is still on the system, it'll use it since that's what
24 was (automatically) configured in user settings, but if it's cleaned off
25 as a now unneeded dependency, akonadi would of course fail, until the
26 user's configure is (manually) updated. Of course, new-installs or new-
27 users wouldn't have the issue as they'd not have that bit of existing
28 config. I don't recall for sure whether it was 4.4 or 4.5 that switched,
29 thus the gap above, but the sqlite dependency is FAR easier to deal with,
30 now that they've worked thru the threading issues or whatever it was that
31 was blocking its use earlier.
33 I wasn't aware of a 32/64 mysql database incompatibility, but assuming
34 Alex is correct, you might experience issues with that mysql/akonadi
35 dependency, if you're still using an older kde or if you migrate the same
36 home (with the mysql config) over. But as long as you either don't use
37 akonadi (with 4.4/4.5 it's used for the address book but not for kmail
38 itself; I don't know about kopete/etc as I don't do IRC/IM), or already
39 have it configured for the sqlite backend, and aren't using mysql for
40 anything else, you should be fine.
42 And even in the event that you're still using the mysql backend, at worst,
43 akonadi only caches the data before its written to traditional text files,
44 so any loss of data should be only what didn't get written back to the
45 permanent storage. tho of course it might not be working for a bit as you
46 get the config squared away.
48 Basically, then, as from what I recall you're following newer kde, 4.5.x,
49 and not waiting for full Gentoo stabilization, I'd ensure that you're
50 using the sqlite backend, not mysql, before you copy your home dir over,
51 and then you should be fine.
53 --
54 Duncan - List replies preferred. No HTML msgs.
55 "Every nonfree program has a lord, a master --
56 and if you use the program, he is your master." Richard Stallman


Subject Author
Re: [gentoo-amd64] Re: About to install on a 64 bit system. Advice wanted. Florian Philipp <lists@××××××××××××××××××.net>