cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Olivier Mallassi <omalla...@octo.com>
Subject Re: ec2 tests
Date Fri, 18 Jun 2010 15:00:37 GMT
Hi all,

@Chris, Did you get any bench you could share with us?

I am running the same kind of test on EC2  (m.large instances) :
- one VM for stress.py (can be launched several times)
- another VM for a unique cassandra node

I use the default conf settings (Xmx 1G, concurrentwrite 32...) except for
commitlog and DataFileDirectory : I have a raid0 EBS for commit log and
another raid0 EBS for data.

I can't get through 7500 write/sec (when launching 4 stress.py in the same
time).
Moreover I can see some pending tasks in the
org.cassandra.db.ColumnFamilyStores.Keyspace1.Standard1 MBean

Any ideas on the bottleneck?

Thanks a lot.

oliv/

On Fri, May 28, 2010 at 5:14 PM, gabriele renzi <rff.rff@gmail.com> wrote:

> On Fri, May 28, 2010 at 3:48 PM, Mark Greene <greenemj@gmail.com> wrote:
> > First thing I would do is stripe your EBS volumes. I've seen blogs that
> say
> > this helps and blogs that say it's fairly marginal.
>
>
> just to point out: another option is to stripe the ephemeral drives
> (if using instances > small)
>



-- 
............................................................
Olivier Mallassi
OCTO Technology
............................................................
50, Avenue des Champs-Elysées
75008 Paris

Mobile: (33) 6 28 70 26 61
Tél: (33) 1 58 56 10 00
Fax: (33) 1 58 56 10 01

http://www.octo.com
Octo Talks! http://blog.octo.com

Mime
View raw message