I am looking for advice from others that are further along in deploying
Cassandra in production environments than we are. I want to know what you are
finding your bottlenecks to be. I would feel silly purchasing dual processor
quad core 2.93ghz Nehalem machines with 192 gigs of RAM just to fin
In 0.6 gossip is over TCP.
On Fri, Mar 5, 2010 at 6:54 PM, Ashwin Jayaprakash
wrote:
> Hey guys! I have a simple question. I'm a casual observer, not a real
> Cassandra user yet. So, excuse my ignorance.
>
> I see that the Gossip feature uses UDP. I was curious to know if you guys
> faced issues
Hey guys! I have a simple question. I'm a casual observer, not a real
Cassandra user yet. So, excuse my ignorance.
I see that the Gossip feature uses UDP. I was curious to know if you guys
faced issues with unreliable transports in your production clusters? Like
faulty switches, dropped packets et
Fixed, thanks.
On Fri, Mar 5, 2010 at 11:12 AM, B. Todd Burruss wrote:
> https://issues.apache.org/jira/browse/CASSANDRA-853
>
> On Thu, 2010-03-04 at 19:00 -0800, Jonathan Ellis wrote:
>
> This is the 0.6 beta yes? Looks like a regression, please open a ticket.
>
> On Thu, Mar 4, 2010 at 8:54 P
Ah, will look at the jmx console. Thought it was under nodetool.
cont...@cl201 ~/swell/cassandra $ iostat -x
Linux 2.6.30-gentoo-r4pb (cl201) 03/05/10 _x86_64_(8 CPU)
avg-cpu: %user %nice %system %iowait %steal %idle
9.660.002.184.980.00 83.18
Devic
Point taken. Was thinking of switching in parallel using a 2nd cassandra
instance (perhaps on the same set of machines). This way if loadbalancing is
too slow, I can try this version.
From: Stu Hood
To: cassandra-user@incubator.apache.org
Sent: Fri, March 5,
On Fri, Mar 5, 2010 at 1:36 PM, shiv shivaji wrote:
> Sorry, how to get compaction progress with 0.6. Is it in nodetool or
> somewhere else? I tried a few options after nodetool and did not get this
> info.
it's under CompactionManager in jmx. I'm not sure if nodetool exposes
this but it's easy
But rather than switching, you should definitely try the 'loadbalance' approach
first, and see whether OrderPP works out for you.
-Original Message-
From: "Chris Goffinet"
Sent: Friday, March 5, 2010 1:43pm
To: cassandra-user@incubator.apache.org
Subject: Re: Dynamically Switching from O
At this time, you have to re-import the data.
-Chris
On Fri, Mar 5, 2010 at 11:42 AM, shiv shivaji wrote:
> I started with the ordered partitioner as I was hoping to make use of the
> map-reduce functionality. However, my data was likely lopped onto 2 key
> machines with most of it on one (as s
I started with the ordered partitioner as I was hoping to make use of the
map-reduce functionality. However, my data was likely lopped onto 2 key
machines with most of it on one (as seen from another thread. There were also
machine failures to blame for the uneven distribution). One solution whi
Sorry, how to get compaction progress with 0.6. Is it in nodetool or somewhere
else? I tried a few options after nodetool and did not get this info.
My vmstats are
procs ---memory-- ---swap-- -io -system-- cpu
r b swpd free buff cache si sobib
Generally, you want to have different types of data in different CFs
so you can tune them separately (key / row caches).
Mixing different row types in one CF also makes doing get_slice_range
scans difficult.
On Fri, Mar 5, 2010 at 12:04 PM, Erik Holstad wrote:
> What are the benefits of using mu
On 2010-03-05 18:30, David Strauss wrote:
> On 2010-03-05 18:04, Erik Holstad wrote:
>> So you can either have
>> ColumnFamilyFrom:userTo:{userFrom->messageid}
>> ColumnFamilyTo:userFrom:{userTo->messageid}
>>
>> or something like
>> ColumnFamily:user_to:{user1_messageId, user2_messageId}
>> Column
On 2010-03-05 18:04, Erik Holstad wrote:
> What are the benefits of using multiple ColumnFamilies compared to using
> a composite row name?
Just for terminology's sake, I'll note that rows have keys, not names.
Only columns and supercolumns have names.
I'm not the top expert here by any means, bu
What are the benefits of using multiple ColumnFamilies compared to using a
composite
row name?
Example: You have messages that you want to index on sent and to.
So you can either have
ColumnFamilyFrom:userTo:{userFrom->messageid}
ColumnFamilyTo:userFrom:{userTo->messageid}
or something like
Colu
https://issues.apache.org/jira/browse/CASSANDRA-853
On Thu, 2010-03-04 at 19:00 -0800, Jonathan Ellis wrote:
> This is the 0.6 beta yes? Looks like a regression, please open a ticket.
>
> On Thu, Mar 4, 2010 at 8:54 PM, Todd Burruss wrote:
> > i'm seeing a lot of these ... any idea?
> >
> > 20
yes, 0.6 beta2
i'll open ticket
On Thu, 2010-03-04 at 19:00 -0800, Jonathan Ellis wrote:
> This is the 0.6 beta yes? Looks like a regression, please open a ticket.
>
> On Thu, Mar 4, 2010 at 8:54 PM, Todd Burruss wrote:
> > i'm seeing a lot of these ... any idea?
> >
> > 2010-03-04 18:53:21,4
On Fri, Mar 5, 2010 at 2:13 AM, shiv shivaji wrote:
> 1. Is there a way to estimate the time it would take to compact this work
> load? I hope the load balancing will be much faster after the compaction.
> Curious how fast I can get the transfer once compaction is done.
0.6 gives you compaction p
Thank you Jonathan!
On Fri, Mar 5, 2010 at 00:03, Jonathan Ellis wrote:
> On Thu, Mar 4, 2010 at 2:51 AM, Eran Kutner wrote:
>> On Tue, Mar 2, 2010 at 15:44, Jonathan Ellis wrote:
>>>
>>> On Tue, Mar 2, 2010 at 6:43 AM, Eran Kutner wrote:
>>> > Is the procedure described in the description of
Thanks for the pointer. Wanted to figure out if this is the real bottleneck as
there might be something else contributing to the low speed.
Let me explain our setup in more detail:
We are using cassandra to store about 700 million images. This includes image
metadata and the image (in binary for
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