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High availability (HA) solution #13

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cocalele opened this issue May 1, 2023 · 1 comment
Open

High availability (HA) solution #13

cocalele opened this issue May 1, 2023 · 1 comment
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help wanted Extra attention is needed

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@cocalele
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cocalele commented May 1, 2023

Currently ViveNAS is not 100% HA service. The backend store PureFlash is HA, but the front end interface libvivefs and rocksdb is not. So it may need long time to read WAL to restore service after a node failure or power outage.

A possible solution to this is, place all the memory table and states into a pooled/shareable memory device. When the primary node is donw, the slave node can take over all the memory of primary and continue to provide service.

I think it's not a myth. CXL technology is making memory pooling a reality. ViveNAS will be the first service benifit from CXL.
@cocalele cocalele added the help wanted Extra attention is needed label May 1, 2023
@cocalele
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A shared pool memory allocator is needed to use CXL memory pool. so memory can be accessed and inherited between servers .

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