rash/evictions.
> >
> > Neither cache seems suitable for wide row + slicing usecases, eg time
> > series data or CQL tables whose compound keys create wide rows under the
> > hood.
> >
> > Bill
> >
> >
> > On 2013/08/23 17:30, Robert Coli wro
13 at 7:40 PM, Boris Yen wrote:
> If you are using off-heap memory for row cache, "all writes invalidate the
> entire row" should be correct.
>
> Boris
>
>
> On Fri, Aug 23, 2013 at 8:32 AM, Robert Coli (mailto:rc...@eventbrite.com)> wrote:
&
At the Cassandra 2013 conference, Axel Liljencrantz from Spotify discussed
various cassandra gotchas in his talk on "How Not to Use Cassandra." One of the
sections of his talk was on the row cache. If you weren't at the talk, or don't
remember it, the video is up on youtube [1]. The discussion o
And by that last statement, I mean are there any further things I should look
for given the information in my response? I'll definitely look at implementing
your suggestions and see what I can find.
On Aug 7, 2013, at 7:31 PM, "Faraaz Sareshwala"
wrote:
> Thanks Aaron.
UG so you can see what's going on.
> It's unusual for only the gossip pool to backup. If there were issues with GC
> taking CPU we would expect to see it across the board.
>
> Cheers
>
>
>
> -
> Aaron Morton
> Cassandra Consultant
>
I'm running cassandra-1.2.8 in a cluster with 45 nodes across three racks. All
nodes are well behaved except one. Whenever I start this node, it starts
churning CPU. Running nodetool tpstats, I notice that the number of pending
gossip stage tasks is constantly increasing [1]. When looking at nodeto
I assume you are using the leveled compaction strategy because you have 5mb
sstables and 5mb is the default size for leveled compaction.
To change this default, you can run the following in the cassandra-cli:
update column family cf_name with compaction_strategy_options =
{sstable_size_in_mb: 25
On that note, is anyone using this library in production? Can anyone speak to
its stability and readiness for use? I only noticed it on the list of cassandra
clients a few days ago and haven't heard much talk about it elsewhere.
Faraaz
On Wed, Jul 10, 2013 at 05:55:55PM -0700, Baskar Duraikannu w
What does cassandra do when it is at its data capacity (disk drives and memtable
is full) and writes continue to pour in? My intuition says that cassandra won't
be able to handle the new writes (they will either get silently dropped or
cassandra will hit an OOM -- does anyone know which one?). The
Hi,
I couldn't find any information on the following error so I apologize if it has
already been discussed.
On some of my nodes, I'm getting the following exception when cassandra starts
up:
2013-06-19 22:17:39.480414500 Exception encountered during startup: unable to
find sufficient sources fo
My company is planning on deploying cassandra to three separate datacenters.
Each datacenter will have a cassandra cluster with a separate set of seeds
specific to that datacenter. However, the cluster name will be the same.
Question 1: is this enough to guarentee that the three datacenters will h
Can you expand on the reasoning behind this? I was bitten by this yesterday when
trying to change the cluster name -- I thought I could just change it in the
cassandra.yaml and be done with it but cassandra wouldn't start because of this
error.
What's the process when it's not a test system (mine
I'll be attending and will try and meet up with you :). I see your posts often
on this list -- would love to pick your brain and learn more about what you are
using cassandra for and how it's working for you.
I'm a software engineer at Quantcast and we're just beginning to use cassandra.
So far i
All the documentation that I have read about cassanrda always says to keep the
same list of seeds on every node in the cluster. Without this, you can end up
with fragmentation within your cluster where nodes don't know about other nodes
in the cluster. In your case, sure the nodes will be in the cl
Others on this list may know better, but it might not be good to have all your
clients create a schema on initialization. They can all use it once it has been
created, but creating it should be done by a single entity. One of the issues
that can come up if you make changes to schemas at the same ti
omatic)
> End-Date: 2013-05-20 11:48:41
>
> I have two Java distros - one OpenJava and another Oracle 1.7, I did not set #
> CASSANDRA_HOME env. var, may this helps.
>
> Regards,
>
> Arthur
>
>
>
> Original Message
> From: Faraaz Sareshwala
> To:
> Regards,
>
> Arthur
>
>
>
> Original Message
> From: Faraaz Sareshwala
> To: user
> Sent: Mon, May 20, 2013 3:09 pm
> Subject: Re: Unable to start Cassandra
>
>
> The logs don't seem to be talking about memory issues -- it can
The logs don't seem to be talking about memory issues -- it can't find the log4j
settings file in the correct location under where the CASSANDRA_HOME environment
variable points to.
I have packaged cassandra myself so I'm not entirely familiar with the
pre-packaged installations. Try doing the fol
This is also my first post here :).
While CQL3 is recommended for new projects, Thrift isn't going anywhere. You
don't necessarily need to use the binary protocol for CQL3 either. You can
execute CQL3 queries through Thrift. As far as I know, the new binary protocol
is still beta in 1.2.
Faraaz
19 matches
Mail list logo
