cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Alain RODRIGUEZ <>
Subject Re: Data Size on each node
Date Tue, 01 Sep 2015 11:11:09 GMT

Our migration to SSD (from m1.xl to I2.2xl on AWS) has been a big win. I
mean we wen from 80 / 90 % disk utilisation to 20 % max. Basically,
bottleneck are not disks performances anymore in our case. We get rid of
one of our major issue that was disk contention.

I highly recommend you to go ahead with this, even more with such a big
data set. Yet it will probably be more expensive per node.

An other solution for you might be adding nodes (to have less to handle per
node and make maintenance operations like repair, bootstrap, decommission,
... faster)



2015-09-01 10:17 GMT+02:00 Sachin Nikam <>:

> We currently have a Cassandra Cluster spread over 2 DC. The data size on
> each node of the cluster is 1.2TB with spinning disk. Minor and Major
> compactions are slowing down our Read queries. It has been suggested that
> replacing Spinning disks with SSD might help. Has anybody done something
> similar? If so what has been the results?
> Also if we go with SSD, how big can each node get for commercially
> available SSDs?
> Regards
> Sachin

View raw message