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From "aaron@tophold.com" <aa...@tophold.com>
Subject Re: Re: What's the best practice to init the cache when in cluster env?
Date Tue, 26 Sep 2017 08:46:13 GMT
Thanks Denis, 

The real tough issue is we not sure when the entire cluster may be ready, as we may increase
or decrease the nodes at run-time. 

Another question is , if I load the data once on first started node,  after other nodes bring
up, and after re-balance, will the primary nodes evict the entries not below to it?

As we have regular aggregated run locally on each nodes, we do not want this will be too heavy
on the first node. 


From: Denis Mekhanikov
Date: 2017-09-25 19:46
To: user
Subject: Re: What's the best practice to init the cache when in cluster env?
Hi Aaron!

There are two good options for data loading: using DataStreamer or IgniteCache.loadCache(...).
The second option is good when initial data is stored in some database.

If you worry about overhead on data rebalancing, you can start the cluster and start streaming
data once all nodes are up. In this case records will appear at their final destination at
once, without need to move to other nodes.


пн, 25 сент. 2017 г. в 14:31, aaron@tophold.com <aaron@tophold.com>:
hi All, 

If we have dozen of nodes to cache millions data from DB;

When init,  what's the best way to loading those data? we use the data streamer to load data,
while all our entry include a partition ID when insert into DB. 

As the nodes are started one by one, if loading from one Node and then re-balance this seems
impossible & wasting. 

Not sure whether there any guideline or best practice/advice for such scenario.

Thanks for our time!


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