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From "Sylvain Lebresne (JIRA)" <>
Subject [jira] [Updated] (CASSANDRA-1278) Make bulk loading into Cassandra less crappy, more pluggable
Date Thu, 19 May 2011 12:26:47 GMT


Sylvain Lebresne updated CASSANDRA-1278:

    Attachment: 0001-Add-bulk-loader-utility.patch

Attaching patch that implements the "simpler" idea. It provide a new utility 'sstableloader'
(a fat client basically) that given a sstable (or more) will stream the relevant parts of
that sstable to the relevant nodes.

The tool tries to be self-documented but basically you must have a sstable with -Data and
-Index component (we really need a -Index component to be able to do anything) in a directory
dir whose name is the keyspace and call 'sstableloader dir'.

Alternatively, if dir seats on one of the machine of the cluster, you can simply use a JMX
call with as argument the path to dir.

> Make bulk loading into Cassandra less crappy, more pluggable
> ------------------------------------------------------------
>                 Key: CASSANDRA-1278
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Jeremy Hanna
>            Assignee: Sylvain Lebresne
>             Fix For: 0.8.1
>         Attachments: 0001-Add-bulk-loader-utility.patch, 1278-cassandra-0.7-v2.txt, 1278-cassandra-0.7.1.txt,
>   Original Estimate: 40h
>          Time Spent: 40h 40m
>  Remaining Estimate: 0h
> Currently bulk loading into Cassandra is a black art.  People are either directed to
just do it responsibly with thrift or a higher level client, or they have to explore the contrib/bmt
example -  That contrib module requires delving
into the code to find out how it works and then applying it to the given problem.  Using either
method, the user also needs to keep in mind that overloading the cluster is possible - which
will hopefully be addressed in CASSANDRA-685
> This improvement would be to create a contrib module or set of documents dealing with
bulk loading.  Perhaps it could include code in the Core to make it more pluggable for external
clients of different types.
> It is just that this is something that many that are new to Cassandra need to do - bulk
load their data into Cassandra.

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