cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "R. Verlangen" <>
Subject Writes slower then reads
Date Thu, 05 Jan 2012 10:57:14 GMT
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,

View raw message