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Uma Maheswara Rao G resolved HDFS-13762. ---------------------------------------- Fix Version/s: 3.3.0 Hadoop Flags: Reviewed Resolution: Fixed Closing this issue as all the sub tasks resolved. Thanks you [~PhiloHe] ,[~Sammi] , [~rakeshr], [~weichiu] and [~anoop.hbase] for the contribution and reviews. > Support non-volatile storage class memory(SCM) in HDFS cache directives > ----------------------------------------------------------------------- > > Key: HDFS-13762 > URL: https://issues.apache.org/jira/browse/HDFS-13762 > Project: Hadoop HDFS > Issue Type: New Feature > Components: caching, datanode > Reporter: Sammi Chen > Assignee: Feilong He > Priority: Major > Fix For: 3.3.0 > > Attachments: HDFS-13762.000.patch, HDFS-13762.001.patch, > HDFS-13762.002.patch, HDFS-13762.003.patch, HDFS-13762.004.patch, > HDFS-13762.005.patch, HDFS-13762.006.patch, HDFS-13762.007.patch, > HDFS-13762.008.patch, HDFS_Persistent_Memory_Cache_Perf_Results.pdf, > SCMCacheDesign-2018-11-08.pdf, SCMCacheDesign-2019-07-12.pdf, > SCMCacheDesign-2019-07-16.pdf, SCMCacheDesign-2019-3-26.pdf, > SCMCacheTestPlan-2019-3-27.pdf, SCMCacheTestPlan.pdf > > > No-volatile storage class memory is a type of memory that can keep the data > content after power failure or between the power cycle. Non-volatile storage > class memory device usually has near access speed as memory DIMM while has > lower cost than memory. So today It is usually used as a supplement to > memory to hold long tern persistent data, such as data in cache. > Currently in HDFS, we have OS page cache backed read only cache and RAMDISK > based lazy write cache. Non-volatile memory suits for both these functions. > This Jira aims to enable storage class memory first in read cache. Although > storage class memory has non-volatile characteristics, to keep the same > behavior as current read only cache, we don't use its persistent > characteristics currently. > > > -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-dev-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-dev-h...@hadoop.apache.org