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From ruslan usifov <ruslan.usi...@gmail.com>
Subject Re: slow read
Date Mon, 05 Mar 2012 08:46:26 GMT
2012/3/5 Jeesoo Shin <bsheep@gmail.com>

> Hi all.
>
> I have very SLOW READ here. :-(
> I made a cluster with three node (aws xlarge, replication = 3)
> Cassandra version is 1.0.6
> I have inserted 1,000,000 rows. (standard column)
> Each row has 200 columns.
> Each column has 16 byte key,  512 byte value.
>
> I used Hector createSliceQuery to get one column in a row.
> This basic query(random row, fixed column) is created with multiple
> thread and hit cassandra.
>
> I only get up to 140 request per second. Is this all I can get for read?
> Or am I doing something wrong?
> Interestingly, when I request rows which doesn't exist, it goes up to
> 1600 per second.
>
>
You must test read performance by paralel test (ie multiple threads). The
result when not existent rows are more faster is result of bloom filter



>
> ANY insight, share will be extremely helpful.
> Thank you.
>
> Regards,
> Jeesoo.
>

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