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From Arthur Zubarev <>
Subject Re: Indexes Fragmentation
Date Sat, 04 Oct 2014 01:03:56 GMT
Hello Rob,
    I now see I had misspelled the word tall for toll, anyways, if I    understood correctly,
your reply implies there is no impact    whatsoever and there is no need to defrug indexes
of the frequently    changing columns. 

Am I right?
Thank you!





---- Original Message ----
From: Robert Coli <>
To: user <>
Sent: Mon, Sep 29, 2014 8:01 pm
Subject: Re: Indexes Fragmentation

On Sun, Sep 28, 2014 at 9:49 AM, Arthur Zubarev <> wrote:
There are 200+ times more updates and 50x inserts than analytical loads.

In Cassandra to just be able to query (in CQL) on a column I have to have an index, the question
is what tall the fragmentation coming from the frequent updates and inserts has on a CF? Do
I also need to manually defrug? 

You have appeared to have just asked if maintaing indexes which have a high rate of change
in a log structured database with immutable data files is likely to be more performant than
maintaining them in a database with modify-in-place semantics.



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