[ https://issues.apache.org/jira/browse/HBASE-22749?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17566958#comment-17566958 ]
Hudson commented on HBASE-22749: -------------------------------- Results for branch branch-2.5 [build #165 on builds.a.o|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.5/165/]: (x) *{color:red}-1 overall{color}* ---- details (if available): (/) {color:green}+1 general checks{color} -- For more information [see general report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.5/165/General_20Nightly_20Build_20Report/] (x) {color:red}-1 jdk8 hadoop2 checks{color} -- For more information [see jdk8 (hadoop2) report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.5/165/JDK8_20Nightly_20Build_20Report_20_28Hadoop2_29/] (/) {color:green}+1 jdk8 hadoop3 checks{color} -- For more information [see jdk8 (hadoop3) report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.5/165/JDK8_20Nightly_20Build_20Report_20_28Hadoop3_29/] (/) {color:green}+1 jdk11 hadoop3 checks{color} -- For more information [see jdk11 report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.5/165/JDK11_20Nightly_20Build_20Report_20_28Hadoop3_29/] (/) {color:green}+1 source release artifact{color} -- See build output for details. (/) {color:green}+1 client integration test{color} > Distributed MOB compactions > ---------------------------- > > Key: HBASE-22749 > URL: https://issues.apache.org/jira/browse/HBASE-22749 > Project: HBase > Issue Type: New Feature > Components: mob > Reporter: Vladimir Rodionov > Assignee: Vladimir Rodionov > Priority: Major > Fix For: 3.0.0-alpha-1, 2.5.0 > > Attachments: HBASE-22749-branch-2.2-v4.patch, > HBASE-22749-master-v1.patch, HBASE-22749-master-v2.patch, > HBASE-22749-master-v3.patch, HBASE-22749-master-v4.patch, > HBASE-22749_nightly_Unit_Test_Results.csv, > HBASE-22749_nightly_unit_test_analyzer.pdf, HBase-MOB-2.0-v3.0.pdf > > > There are several drawbacks in the original MOB 1.0 (Moderate Object > Storage) implementation, which can limit the adoption of the MOB feature: > # MOB compactions are executed in a Master as a chore, which limits > scalability because all I/O goes through a single HBase Master server. > # Yarn/Mapreduce framework is required to run MOB compactions in a scalable > way, but this won’t work in a stand-alone HBase cluster. > # Two separate compactors for MOB and for regular store files and their > interactions can result in a data loss (see HBASE-22075) > The design goals for MOB 2.0 were to provide 100% MOB 1.0 - compatible > implementation, which is free of the above drawbacks and can be used as a > drop in replacement in existing MOB deployments. So, these are design goals > of a MOB 2.0: > # Make MOB compactions scalable without relying on Yarn/Mapreduce framework > # Provide unified compactor for both MOB and regular store files > # Make it more robust especially w.r.t. to data losses. > # Simplify and reduce the overall MOB code. > # Provide 100% compatible implementation with MOB 1.0. > # No migration of data should be required between MOB 1.0 and MOB 2.0 - just > software upgrade. -- This message was sent by Atlassian Jira (v8.20.10#820010)