Hi All,
I happen to see this message board just now. I want to clarify
certain things. I'm new to Solr. I'm trying to combine Solr's index
replication and optimization. I have some doubts about the working of
replication in a master slave setup.
>From the post, I understand that if the index is not optimized, only the
modified segments are transferred from the master to slave. I have two
scenarios.
1. Optimizing the index only in the master and replicating the optimized
index to the slave - from my understanding this would copy the whole index
every time (pol interval).
2. Optimizing the index only in the slave. From my testing, I observed that
slave replaces its optimized index with that of the masters non-optimized
index during every replication (poll interval). So even if the index has not
changed in the master, if the slave tries to optimize after every
replication, sooner it will be replaced by the masters index - based on my
observations.
Questions:
>From my opinion, if at all I want to optimize, doing it in master and
replicating optimized index to slaves would be more sensible. Am I right?
1.Is there a way to combine optimization along with replication?
2. I could not understand when merging of indexes would be useful. I believe
that master and slave should always have a consistent view of the index
which is what replication guarantees. So why should I merge index?
3. If I have to optimize either in the master or in the slave, will the
entire index be copied always to slave?
4. During replication, I found that the size of the index and the number of
files in the index are different in the master and slave. Still they were in
sync. Do they have some internal meta data calculations to find the
difference (number of files per index version) between the master and the
slave to initiate replication?
Your suggestions/guidance would me very helpful to get a clear
understanding. Please help.
Thanks,
Sudarshan
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