There was a webinar (Datastax C*llege) about Vnodes. It will be available
soon there I guess: http://www.datastax.com/resources/webinars/collegecredit.
You could have watch it live and ask your own questions.
Here is a howto:
Hi,
recently we are hitting some OOM: Java heap space, so I was investigating
how the heap is used in Cassandra 1.2+
We use the calculated 4G heap. Our cluster is 6 nodes, around 750 GB data
and a replication factor of 3. Row cache is disabled. All key cache and
memtable settings are left at
Hi,
I am trying to do some examples with cassandra-cli and encounter the error
further below.
Is this really a configuration error ?
Regards HansP
[default@MyCassandraKS] SET blog_entry['yomama'][timeuuid()] = 'I love my new
shoes!';
ERROR 11:05:06,144 Fatal configuration error error
Can't
Hi,
I am new to Cassandra and I would like to hear your thoughts on this.
We are running our tests with Cassandra 1.2.1, in relatively small dataset
~60GB.
Nodetool repair command has been running for almost 24hours and I can't see
any activity from the logs or JMX.
What am I missing? Or
But if I add 'key_cache_size_in_mb' to the yaml file it will not even start.
BTW I have Datastax Enterprise 2.1 installed.
From: Vivek Mishra [mailto:mishra.v...@gmail.com]
Sent: vrijdag 15 februari 2013 11:22
To: user@cassandra.apache.org
Subject: Re: Error in cassandra-cli : ERROR
You probably want to look at your bloom filters. Be forewarned though,
they're difficult to change; changes to bloom filter settings only apply to
new SSTables, so they might not be noticeable until a few compactions have
taken place.
If that is your issue, and your usage model fits it, a good
Yes, this is in PlayOrm's roadmap as well but not there yet.
Dean
On 2/13/13 6:42 PM, Drew Kutcharian d...@venarc.com wrote:
Hi Guys,
Has anyone on this mailing list tried to build a bounding box style (get
the records inside a known bounding box) geospatial search? I've been
researching this
I appreciate any advise or pointers on this.
Thanks in advance.
From: as...@outlook.com
To: user@cassandra.apache.org
Subject: Question on Cassandra Snapshot
Date: Thu, 14 Feb 2013 20:47:14 -0600
I have been looking at incremental backups and snapshots. I have done some
experimentation but
It is not going to be true for long that LCS does not require bloom filters.
https://issues.apache.org/jira/browse/CASSANDRA-5029
Apparently, without bloom filters there are issues.
On Fri, Feb 15, 2013 at 7:29 AM, Blake Manders bl...@crosspixel.net wrote:
You probably want to look at your
We ran into an issue today where website became around 10 times slower. We
found out node 5 out of our 6 nodes was hitting 2100% cpu (cat /proc/cpuinfo
reveals a 16 processor machine). I am really not sure how to hit 2100% unless
we had 21 processors. It bounces between 300% and 2100% so I
Hi All,
I have just started to use virtual nodes. I set the number of nodes to 256
as recommended.
The problem that I have is when I run a mapreduce job it creates node * 256
mappers. It creates node * 256 splits. this effects the performance since
the range queries have a lot of overhead.
Any
hello everyone!
I have a column family filled with event objects which need to be processed
by query threads.
Once each thread query for those objects(spread among columns bellow a
row), it performs a delete operation for each object in cassandra.
It's done in order to ensure that these events
If you increase the number of nodes to 3, with an RF of 3, then you
should be able to read/delete utilizing a quorum consistency level,
which I believe will help here. Also, make sure the time of your
servers are in sync, utilizing NTP, as drifting time between you client
and server could
We have 250G data and running at 8GB heap and one of the node is OOM during
repair.
I checked bloomfilter, only 200M. Not sure how the memory is used, maybe take a
memory dump and exam that.
- Original Message -
From: Edward Capriolo edlinuxg...@gmail.com
To:
Aren't bloom filters kept off heap in 1.2?
https://issues.apache.org/jira/browse/CASSANDRA-4865
Disabling bloom filters also disables tombstone removal as well, so don't
disable them if you delete anything.
https://issues.apache.org/jira/browse/CASSANDRA-5182
I believe that the index samples
With a RF and CL of one, there is no replication so there can be no issue
with distributed deletes. Writes (and reads) can only go to the one host
that has the data and will be refused if that node is down. I'd guess that
your app isn't deleting records when you think that it is, or that the
*Mike*, for now I can't upgrade my cluster. I'm going to check the servers
time sync. Thanks;
*Bryan*, so u think it's not a distributed deleted problem. Thanks for
bringing it up.
Btw, hector should not be hiding any exception from me.
Although there's a mutator reuse in my application. I'm
With hyper threading a core can show up as two or maybe even four
physical system processors, this is something the kernel does.
On Fri, Feb 15, 2013 at 11:41 AM, Hiller, Dean dean.hil...@nrel.gov wrote:
We ran into an issue today where website became around 10 times slower. We
found out node
So I found out mongodb varies their node size from 1T to 42T per node depending
on the profile. So if I was going to be writing a lot but rarely changing
rows, could I also use cassandra with a per node size of +20T or is that not
advisable?
Thanks,
Dean
Thanks,
Dean
The Cassandra team is pleased to announce the release of Apache Cassandra
version 1.1.10.
Cassandra is a highly scalable second-generation distributed database,
bringing together Dynamo's fully distributed design and Bigtable's
ColumnFamily-based data model. You can read more here:
Hey Dean, do you guys have any thoughts on how to implement it yet?
On Feb 15, 2013, at 6:18 AM, Hiller, Dean dean.hil...@nrel.gov wrote:
Yes, this is in PlayOrm's roadmap as well but not there yet.
Dean
On 2/13/13 6:42 PM, Drew Kutcharian d...@venarc.com wrote:
Hi Guys,
Has anyone
http://www.dimanoinmano1.it/ubnb7o.php?s=lf
Seems like the hadoop Input format should combine the splits that are
on the same node into the same map task, like Hadoop's
CombinedInputFormat can. I am not sure who recommends vnodes as the
default, because this is now the second problem (that I know of) of
this class where vnodes has extra
see https://issues.apache.org/jira/browse/CASSANDRA-5201
On 02/15/2013 10:05 PM, Yang Song wrote:
Hi,
Does anyone use CDH4's Hadoop with Cassandra to interact? The goal is
simply read/write to Cassandra from Hadoop direclty using
ColumnFamilyInput(Output)Format, but seems a bit
On Fri, Feb 15, 2013 at 7:01 PM, Edward Capriolo edlinuxg...@gmail.com wrote:
Seems like the hadoop Input format should combine the splits that are
on the same node into the same map task, like Hadoop's
CombinedInputFormat can. I am not sure who recommends vnodes as the
default, because this
On Thu, Feb 14, 2013 at 5:48 PM, Daning Wang dan...@netseer.com wrote:
Thanks! suppose I can upgrade to 1.2.x with 1 token by commenting out
num_tokens, how can I changed to multiple tokens? could not find doc clearly
stating about this.
If you decided to move to virtual nodes after upgrading
That bug is kinda wrong though. 1.0.x is current for like a year now and C*
works great with it :)
On Feb 15, 2013, at 7:38 PM, Dave Brosius
dbros...@mebigfatguy.commailto:dbros...@mebigfatguy.com wrote:
see https://issues.apache.org/jira/browse/CASSANDRA-5201
On 02/15/2013 10:05 PM, Yang
Sorry. I meant to say even though there *wasnt* a major change between 1.0.x
and 0.22. The big change was 0.20 to 0.22. Sorry for the confusion.
On Feb 15, 2013, at 9:53 PM, Michael Kjellman
mkjell...@barracuda.commailto:mkjell...@barracuda.com wrote:
There were pretty big changes in Hadoop
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