[ https://issues.apache.org/jira/browse/HDFS-7240?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16297454#comment-16297454 ]
Sanjay Radia commented on HDFS-7240: ------------------------------------ One of issues raised is that connecting the NN to the new block-container layer will be very difficult because removing the FSN/BM lock is challenging. I have attached a doc [Evolving NN using new block container layer|https://issues.apache.org/jira/secure/attachment/12902931/Evolving%20NN%20using%20new%20block-container%20layer.pdf] to HDFS-10419 that describes 2 milestones for connecting the NN to the new block-container layer. The first one does *not* require removing the FSN/BM lock and still gives close to 2x scalability because the block map (which becomes the container map) is reduced significantly. I would still like to also point out (as stated above) and in the doc that the new block-container layer keeps a consistent state using Raft and hence eliminates the coupling between the namespace layer and block layer and that the 2nd milestone of removing the FSN/BM lock is much easier with the new block layer. If you disagree with my lock argument, then the first milestone get good scalability without removing the lock. > Object store in HDFS > -------------------- > > Key: HDFS-7240 > URL: https://issues.apache.org/jira/browse/HDFS-7240 > Project: Hadoop HDFS > Issue Type: New Feature > Reporter: Jitendra Nath Pandey > Assignee: Jitendra Nath Pandey > Attachments: HDFS Scalability and Ozone.pdf, HDFS-7240.001.patch, > HDFS-7240.002.patch, HDFS-7240.003.patch, HDFS-7240.003.patch, > HDFS-7240.004.patch, HDFS-7240.005.patch, HDFS-7240.006.patch, > MeetingMinutes.pdf, Ozone-architecture-v1.pdf, Ozonedesignupdate.pdf, > ozone_user_v0.pdf > > > This jira proposes to add object store capabilities into HDFS. > As part of the federation work (HDFS-1052) we separated block storage as a > generic storage layer. Using the Block Pool abstraction, new kinds of > namespaces can be built on top of the storage layer i.e. datanodes. > In this jira I will explore building an object store using the datanode > storage, but independent of namespace metadata. > I will soon update with a detailed design document. -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org