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Vladimir Rodionov commented on HBASE-21874: ------------------------------------------- With 512GB NVDIMMs and 12 - 16 modules per server we are getting up to 6-8TB of non-volatile memory with DRAM -like access and latency (350ns). We can fit all the data into this - not only bucket cache :). Expensive though. > Bucket cache on Persistent memory > --------------------------------- > > Key: HBASE-21874 > URL: https://issues.apache.org/jira/browse/HBASE-21874 > Project: HBase > Issue Type: New Feature > Components: BucketCache > Affects Versions: 3.0.0 > Reporter: ramkrishna.s.vasudevan > Assignee: Vladimir Rodionov > Priority: Major > Fix For: 3.0.0 > > Attachments: HBASE-21874.patch > > > Non volatile persistent memory devices are byte addressable like DRAM (for > eg. Intel DCPMM). Bucket cache implementation can take advantage of this new > memory type and can make use of the existing offheap data structures to serve > data directly from this memory area without having to bring the data to > onheap. > The patch is a new IOEngine implementation that works with the persistent > memory. > Note : Here we don't make use of the persistence nature of the device and > just make use of the big memory it provides. > Performance numbers to follow. -- This message was sent by Atlassian JIRA (v7.6.3#76005)