Maxim Muzafarov commented on IGNITE-12069:


As discussed with you privately, I've created and assigned to you this issue 
with the previously discussed problem. 

> Create cache shared preloader
> -----------------------------
>                 Key: IGNITE-12069
>                 URL: https://issues.apache.org/jira/browse/IGNITE-12069
>             Project: Ignite
>          Issue Type: Sub-task
>            Reporter: Maxim Muzafarov
>            Assignee: Pavel Pereslegin
>            Priority: Major
>              Labels: iep-28
> {{CacheSharedPreloader}} must do the following:
>  # build the map of partitions and corresponding supplier nodes from which 
> partitions will be loaded [1];
>  # witching cache data storage to {{no-op}} and back to original (HWM must be 
> fixed here for the needs of historical rebalance) under the checkpoint and 
> keep the partition update counter for each partition [1];
>  # run async the eviction indexes for the list of collected partitions (API 
> must be provided by IGNITE-11075) [2];
>  # send a request message to each node one by one with the list of partitions 
> to load [2];
>  # listening for the transmission handler to receive files [2];
>  # run rebuild indexes async over the receiving partitions (API must be 
> provided by IGNITE-11075) [2];
>  # run historical rebalance from LWM to HWM collected above (LWM can be read 
> from the received file meta page) [1];
> The points marked with the label {{[1]}} must be done prior to {{[2]}}.
> NOTE. Check the following things:
>  # Rebalancing of MVCC cache groups;
>  # How LWM and HWM will be set for the historical rebalance;

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