cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jonathan Ellis <>
Subject Re: Performance with Multiple Node Vs Single Node
Date Thu, 18 Feb 2010 18:20:07 GMT
i wouldn't worry about 10ms vs 1ms as long as throughput is still good.

are you on ec2?  have you made sure you're not seeing a latency storm?

are you on 0.5.0 or later?

On Thu, Feb 18, 2010 at 10:36 AM, Richard Grossman <> wrote:
> Hi,
> What the impact on performance to have multiple node ??
> The test we run here with multiple node seems a VERY bad performance
> comparing to the same amount of data located on 1 single node.
> Could you confirm or infirm such statement ?
> I mean if the same operation (write or read) take 5-10 times more time when
> multiple node than single node where is the problem (communication between
> computer) ??. I've read a lot about tuning of memory, disk, io, top, htop
> but nothing about networking operation between node. Is there any way to
> check what going on regarding node intercommunication ??
> In my case all the queries made doesn't use 3% of the CPU nor the read
> operation a lot on the disk.
> Important I'm not talking about heavy load but on single query.
> Thanks

View raw message