accumulo-notifications mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Michael Wall (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (ACCUMULO-4165) Create a user level API for RFile
Date Fri, 27 May 2016 00:56:13 GMT

     [ https://issues.apache.org/jira/browse/ACCUMULO-4165?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Wall updated ACCUMULO-4165:
-----------------------------------
    Priority: Blocker  (was: Major)

> Create a user level API for RFile
> ---------------------------------
>
>                 Key: ACCUMULO-4165
>                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4165
>             Project: Accumulo
>          Issue Type: Improvement
>            Reporter: Keith Turner
>            Assignee: Keith Turner
>            Priority: Blocker
>             Fix For: 1.8.0
>
>
> Users can bulk import RFiles.  Currently the only way users can create RFiles using Accumulo's
public API is via AccumuloFileOutputFormat.  There is no way to read RFiles in the public
API.   Also, the internal APIs for reading and writing RFiles are cumbersome to use.
> I am experimenting with a simple RFile API like the following.  Below is an example of
writing data.
> {code:java}
>     LocalFileSystem localFs = FileSystem.getLocal(new Configuration());
>     RFileWriter writer = RFileFactory.newWriter()
>                                        .withFileName("/tmp/test100M.rf")
>                                        .withFileSystem(localFs).build();
>     writer.startDefaultLocalityGroup();
>     for (int r = 0; r < 10000000; r++) {
>       for (int cq = 0; cq < 10; cq++) {
>         writer.append(genKey(r, cq), genVal(r, cq));
>       }
>     }
>     writer.close();
> {code}
> Below is an example of reading data.
> {code:java}
>     LocalFileSystem localFs = FileSystem.getLocal(new Configuration());
>     Scanner scanner = RFileFactory.newScanner()
>                                           .withFileName("/tmp/test100M.rf")
>                                           .withFileSystem(localFs)
>                                           .withDataCache(250000000)
>                                           .withIndexCache(1000000).build();
> {code}



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message