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From Ben Hegarty <heg...@gmail.com>
Subject Re: How to migrate deltas from file to mongoDB storage
Date Sun, 20 Jul 2014 12:27:42 GMT
Hi Guys,

Just curious if this has been fixed as you're now discussing doing a
release and Mongodb support seems to be a headline feature of the release
and without this patch its slightly broken.

Regards


On Mon, Mar 3, 2014 at 5:57 PM, Ben Hegarty <hegsie@gmail.com> wrote:

> just as an FYI there is a bug in the mongodb impl in the file
> MongoDbDeltaCollection.java here...
>
>  129   @Override
> 130   public WaveletDeltaRecord getDeltaByEndVersion(long version) throws
> IOException {
> 131     DBObject query = createWaveletDBQuery();
> 132
> query.put(MongoDbDeltaStoreUtil.FIELD_TRANSFORMED_RESULTINGVERSION_VERSION,
> version);
> 133
> 134     DBObject result = deltaDbCollection.findOne(query);
> 135
> 136     WaveletDeltaRecord waveletDelta = null;
> 137
> 138     if (result != null)
> 139     try {
> *140       MongoDbDeltaStoreUtil.deserializeWaveletDeltaRecord(result);*
> 141     } catch (PersistenceException e) {
> 142       throw new IOException(e);
> 143     }
> 144     return waveletDelta;
> 145   }
>
> that may cause issues, the deserialised record doesn't actually get
> returned.  Once I fixed the mongodb unit tests, I found it.
>
> Regards
> Ben
>
>
> On Mon, Mar 3, 2014 at 5:02 PM, Pablo Ojanguren <pablojan@gmail.com>
> wrote:
>
>> Great whether import/export tools are realiable. I will perform test too.
>>
>> Thanks
>>
>>
>> 2014-03-03 17:59 GMT+01:00 Yuri Z <vega113@gmail.com>:
>>
>> > I guess it might work. I ll try it out.
>> > On Mar 3, 2014 6:53 PM, "Pablo Ojanguren" <pablojan@gmail.com> wrote:
>> >
>> > > Hi,
>> > >
>> > > I wonder if we could use existing delta export/import utilities to
>> > perform
>> > > such migration. These would be the steps to perform:
>> > >
>> > > 1) Run export utility and get a full backup of deltas
>> > > 2) Change server configuration to use mongoDB for delta persistence
>> > > 3) Run import utility with previous backup files
>> > >
>> > >
>> > > Does anyone see any pitfall or risk in this approach?
>> > >
>> > > Thank you.
>> > >
>> >
>>
>
>
>
> --
> Regards
> Ben
>



-- 
Regards
Ben

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