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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-19027) Make materializations invalidation cache work with multiple active remote metastores
Date Sat, 23 Jun 2018 20:05:00 GMT

    [ https://issues.apache.org/jira/browse/HIVE-19027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16521242#comment-16521242
] 

Hive QA commented on HIVE-19027:
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|| Vote || Subsystem || Runtime || Comment ||
|| || || || {color:brown} Prechecks {color} ||
| {color:green}+1{color} | {color:green} @author {color} | {color:green}  0m  0s{color} |
{color:green} The patch does not contain any @author tags. {color} |
|| || || || {color:brown} master Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  8m  1s{color}
| {color:green} master passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  6s{color} |
{color:green} master passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 42s{color}
| {color:green} master passed {color} |
| {color:blue}0{color} | {color:blue} findbugs {color} | {color:blue}  3m 55s{color} | {color:blue}
ql in master has 2282 extant Findbugs warnings. {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 56s{color} |
{color:green} master passed {color} |
|| || || || {color:brown} Patch Compile Tests {color} ||
| {color:green}+1{color} | {color:green} mvninstall {color} | {color:green}  1m 26s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} compile {color} | {color:green}  1m  3s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javac {color} | {color:green}  1m  3s{color} | {color:green}
the patch passed {color} |
| {color:green}+1{color} | {color:green} checkstyle {color} | {color:green}  0m 41s{color}
| {color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} whitespace {color} | {color:green}  0m  0s{color}
| {color:green} The patch has no whitespace issues. {color} |
| {color:green}+1{color} | {color:green} findbugs {color} | {color:green}  4m 17s{color} |
{color:green} the patch passed {color} |
| {color:green}+1{color} | {color:green} javadoc {color} | {color:green}  0m 55s{color} |
{color:green} the patch passed {color} |
|| || || || {color:brown} Other Tests {color} ||
| {color:green}+1{color} | {color:green} asflicense {color} | {color:green}  0m 13s{color}
| {color:green} The patch does not generate ASF License warnings. {color} |
| {color:black}{color} | {color:black} {color} | {color:black} 23m 47s{color} | {color:black}
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|| Subsystem || Report/Notes ||
| Optional Tests |  asflicense  javac  javadoc  findbugs  checkstyle  compile  |
| uname | Linux hiveptest-server-upstream 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u1 (2016-09-03)
x86_64 GNU/Linux |
| Build tool | maven |
| Personality | /data/hiveptest/working/yetus_PreCommit-HIVE-Build-12026/dev-support/hive-personality.sh
|
| git revision | master / 23d2b80 |
| Default Java | 1.8.0_111 |
| findbugs | v3.0.0 |
| modules | C: ql U: ql |
| Console output | http://104.198.109.242/logs//PreCommit-HIVE-Build-12026/yetus.txt |
| Powered by | Apache Yetus    http://yetus.apache.org |


This message was automatically generated.



> Make materializations invalidation cache work with multiple active remote metastores
> ------------------------------------------------------------------------------------
>
>                 Key: HIVE-19027
>                 URL: https://issues.apache.org/jira/browse/HIVE-19027
>             Project: Hive
>          Issue Type: Improvement
>          Components: Materialized views
>    Affects Versions: 3.0.0
>            Reporter: Jesus Camacho Rodriguez
>            Assignee: Jesus Camacho Rodriguez
>            Priority: Critical
>         Attachments: HIVE-19027.01.patch, HIVE-19027.01.patch
>
>
> The main points:
>  - Only MVs stored in transactional tables can have a time window value of 0. Those are
the only MVs that can be guaranteed to not be outdated when a query is executed, if we use
custom storage handlers to store the materialized view, we cannot make any promises.
>  - For MVs that +cannot be outdated+, we do not check the metastore. Instead, comparison
is based on valid write id lists.
>  - For MVs that +can be outdated+, we still rely on the invalidation cache.
>  ** The window for valid outdated MVs can be specified in intervals of 1 minute (less
than that, it is difficult to have any guarantees about whether the MV is actually outdated
by less than a minute or not).
>  ** The async loading is done every interval / 2 (or probably better, we can make it
configurable).



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