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Subject: Writes slower then reads
From: "R. Verlangen" <robin@us2.nl>
To: user@cassandra.apache.org
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Hi there,

I'm running a cassandra 0.8.6 cluster with 2 nodes (in 2 DC's), RF = 2.
Actual data on the nodes is only 1GB. Disk latency < 1ms. Disk throughput ~
0.4MB/s. OS load always below 1 (on a 8 core machine with 16GB ram).

When I'm running my writes against the cluster with cl = ONE all reads
appear to be faster then the writes.

Average write speed = 1600us/operation
Average read speed = 200us/operation

I'm really wondering why this is the case. Anyone got a clue?

With kind regards,
Robin

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Hi there,<div><br></div><div>I&#39;m running a cassandra 0.8.6 cluster with=
 2 nodes (in 2 DC&#39;s), RF =3D 2. Actual data on the nodes is only 1GB. D=
isk latency &lt; 1ms. Disk throughput ~ 0.4MB/s. OS load always below 1 (on=
 a 8 core machine with 16GB ram).=A0</div>
<div><br></div><div>When I&#39;m running my writes against the cluster with=
 cl =3D ONE all reads appear to be faster then the writes.=A0</div><div><br=
></div><div>Average write speed =3D 1600us/operation</div><div>Average read=
 speed =3D 200us/operation</div>
<div><br></div><div>I&#39;m really wondering why this is the case. Anyone g=
ot a clue?</div><div><br></div><div>With kind regards,</div><div>Robin=A0</=
div>

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