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From "Chris Burroughs (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-1278) Make bulk loading into Cassandra less crappy, more pluggable
Date Mon, 02 May 2011 13:48:03 GMT


Chris Burroughs commented on CASSANDRA-1278:

bq. bq.  There is literature on scalable or dynamic BloomFilters to do this in a mathematically
sound way.

bq. For example?

[1] P. Almeida, C. Baquero, N. Preguica, and D. Hutchison. Scalable bloom
    filters. Information Processing Letters, 101(6):255–261, March 2007.

[2] Deke Guo, Jie Wu, Honghui Chen, Ye Yuan, and Xueshan Luo. The
    dynamic bloom filters. IEEE Transactions on Knowledge and Data
    Engineering, 22(1):120–133, January 2010.

And also "Dynamic Bloom Filters: Analysis and usability" which is not appear to be in  a journal
but does cast some doubt on the practicality.  Google Scholar can find PDFs for all of these.

> Make bulk loading into Cassandra less crappy, more pluggable
> ------------------------------------------------------------
>                 Key: CASSANDRA-1278
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Tools
>            Reporter: Jeremy Hanna
>            Assignee: Matthew F. Dennis
>             Fix For: 0.8.1
>         Attachments: 1278-cassandra-0.7-v2.txt, 1278-cassandra-0.7.1.txt, 1278-cassandra-0.7.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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