Re: [9fans] Migration of vac score to fossil

[Ole-Hjalmar Kristensen <ole.hjalmar.kristensen@gmail.com>]

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Yes, I was think about something like that. As an initial experiment, I
tried to used flfmt with the -v option on a vac archive just to see the
result. It seems that the vac archive does not contain the max qid that
flfmt needs. This seems strange to me, as vac -a should need this info just
as much as fossil needs it. Maybe it's tucked away somewhere else. Guess I
need to look some more at the code.



ole@ole-TECRA-R940 ~/Desktop/plan9 $ bin/fossil/flfmt -h 192.168.0.101 -v
f648dbae0075eb73bc394ad6cd4c059e655e127c fossil.dat
fs header block already exists; are you sure? [y/n]: y
fs file is mounted via devmnt (is not a kernel device); are you sure?
[y/n]: y
0xfb1e734c
0x1d1feaf1
c85978546e4048fce83120d3992cfc2f57ff2f8c
bin/fossil/flfmt: bad root: no qidSpace

    /*
     * Maximum qid is recorded in root's msource, entry #2 (conveniently in
e).
     */
    ventiRead(e.score, VtDataType);
    if(!mbUnpack(&mb, buf, bsize))
        sysfatal("bad root: mbUnpack");
    meUnpack(&me, &mb, 0);
    if(!deUnpack(&de, &me))
        sysfatal("bad root: dirUnpack");
    if(!de.qidSpace)
        sysfatal("bad root: no qidSpace");
    qid = de.qidMax;



On Thu, Dec 17, 2015 at 11:13 PM, Steve Simon <steve@quintile.net> wrote:

> I have long wanted to do this but on the one occasion I tried I got lost
> inside fossil.
>
> the problem is fossil expects venti to have a hierarchy of the form
> /active/ and /archive/ where as your venti does not, I guess it has just
> your home dir.
>
> it is easy to create the required placeholder in a new fossil attached to
> your fossil. what is missing is a fossil admin command to create a new
> directory but attach it to a given, existing venti score. if you could do
> this you could creat an empty fossil attached to your existing fossil and
> then populate your /archive/yyyy/mmdd/usr/yourname with each venti score
> you have from your old vac(1)s.
>
> have a look at the fossil create command.
>
> -Steve
>
>
>
>
> On 17 Dec 2015, at 17:05, Ole-Hjalmar Kristensen <
> ole.hjalmar.kristensen@gmail.com> wrote:
>
> I have a file server running Linux at home, with a normal ext3 file system
> and a plan9port venti. I use this venti for vac backup of both the ext3
> file system and other Linux boxes. However, the 2 TB ext3 is running out of
> space, while the venti is roughly 50% full. I could just buy a bigger disk,
> of course, but the exit3 itself is mainly an archive (pictures, video, and
> many years of accumulated documents and software), so I consider switching
> to a fossil+venti file server instead. The fossil manual says "The score
> should have been generated by fossil rather than by vac, so that the
> appropriate snapshot metadata is present". Is there any way of coercing
> fossil to initialize itself properly from a score produced by vac? I could
> copy the files from ext3, but would likely run out of space in fossil,
> which I gather is a bad idea. I run a 9front cwfs auth/cpu/file server, but
> have no experience with fossil, so any help is welcome.
>
>
>
>
>
>

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