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Editorial Team
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Asked: 2026-06-04T20:24:44+00:00

Here is situation I am trying to fetch around 10k keys from CF. Size

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Here is situation

I am trying to fetch around 10k keys from CF.
Size of cluster : 10 nodes
Data on node : 250 GB
Heap allotted : 12 GB
Snitch used : property snitch with 2 racks in same Data center.
no. of sstables for cf per node : around 8 to 10

I am supercolumn approach.Each row contains around 300 supercolumn which in terms contain 5-10 columns.I am firing multiget with 10k row keys and 1 supercolumn.

When fire the call 1st time it take around 30 to 50 secs to return the result.After that cassandra serves the data from key cache.Then it return the result in 2-4 secs.

So cassandra read performance is hampering our project.I am using phpcassa.Is there any way I can tweak cassandra servers so that I can get result faster?

Is super column approach affects the read performance?

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1 Answer

  1. Editorial Team

    Use of super columns is best suited for use cases where the number of sub-columns is a relatively small number. Read more here:
    http://www.datastax.com/docs/0.8/ddl/column_family

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