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From Dmitriy Setrakyan <dsetrak...@apache.org>
Subject Re: NearCache transaction qeustion
Date Fri, 31 Mar 2017 16:25:50 GMT
On Fri, Mar 31, 2017 at 6:29 AM, ALEKSEY KUZNETSOV <alkuznetsov.sb@gmail.com
> wrote:

> Hi all!
> Consider we have 4 nodes. Node1 contains key1, Node2 contains key1 backup,
> and Node3 near-contains (contains in near cache) key1.
> Now we commit key1 value change like the following : Node4Cache.put(key1,
> updatedValue);
>
> From my point of view Node1 receives prepare request and send
> DhtTxPrepareRequest to Node2 and Node3.
> processDhtTxPrepareRequest will be executed on Node3 and GridNearTxRemote
> will be created by startNearRemoteTx().
>
> What is unclear is the role of GridNearTxRemote ?
>

>From what I remember, this object is created to handle the near transaction
(not the backup transaction). Near cache has to be updated in transactional
fashion, but possibly with a different sync/async policy from primary node,
so we need to handle the near transaction differently.

D.

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