Sorting the Solr Document after clubbing them from multiple instances

[Vineet Mishra]

Hi

I have a Master Solr through which I am querying to multiple solr instance
and aggregating their response and responding back to the user.

Now the requirement is that when I get the data querying multiple solr
instance, I want it to be sorted based on some field name.

Say I have 3 Slave Solrs - Solr 1, Solr 2, Solr 3 and I am getting some
sorted response to the master's requesthandler as

Solr 1 - <str name="value">5</str>
            <str name="value">8</str>

Solr 2 - <str name="value">6</str>
            <str name="value">9</str>

Solr 3 - <str name="value">2</str>
            <str name="value">4</str>

but its not sorted, as in this case I will get the response as

            <str name="value">5</str>
            <str name="value">8</str>
            <str name="value">6</str>
            <str name="value">9</str>
            <str name="value">2</str>
            <str name="value">4</str>

but what I want is, merged sorted response as

            <str name="value">2</str>
            <str name="value">4</str>
            <str name="value">5</str>
            <str name="value">6</str>
            <str name="value">8</str>
            <str name="value">9</str>

What currently I am thinking to move on is, I will be creating a map kind
of thing, with the Field to sort and document, and based on that I will go
on with sorting.

Is this a good way to go, or there are some other way round as well?

Thanks
Vineet