On Tue, Nov 2, 2010 at 2:49 PM, Gary Dusbabek gdusba...@gmail.com wrote:
You'll need to convert from storage-conf.xml to cassandra.yaml and
import your schema at some point. NEWS.txt outlines the general
approach (see Upgrading).
Gary.
On Tue, Nov 2, 2010 at 13:31, Erik Onnen
On Mon, Nov 1, 2010 at 6:01 PM, Henry Luo h...@choicestream.com wrote:
We have a cluster running in one data center, and are adding some in a new
data center. There are some data already in the current cluster.
We did something wrong at first by not having AutoBootstrap on, when we saw
no
On Tue, Oct 26, 2010 at 1:45 PM, Stu Hood stu.h...@rackspace.com wrote:
While the adding virtual tokens/nodes to Cassandra discussion is a good
one, there are a few factors that might delay (or remove?) the necessity of
adding that complexity:
* In Cassandra 0.7, removing load from a node
On Mon, Oct 25, 2010 at 11:21 AM, Eric Rosenberry e...@rosenberry.org wrote:
Hey Chris-
That is tough to say as we started out with no data and have been
continuously loading data into the cluster. Initially we had less data than
the amount of RAM in each node (48 gigs) but we have eventually
On Mon, Oct 25, 2010 at 12:37 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Sun, Oct 24, 2010 at 9:09 PM, Takayuki Tsunakawa
tsunakawa.ta...@jp.fujitsu.com wrote:
From: Jonathan Ellis jbel...@gmail.com
(b) Cassandra generates input splits from the sampling of keys each
node has in memory.
On Mon, Oct 25, 2010 at 10:19 PM, Takayuki Tsunakawa
tsunakawa.ta...@jp.fujitsu.com wrote:
Hello, Mike,
Thank you for your advice. I'll close this thread with this mail (I've been
afraid I was interrupting the community developers with cloudy questions.)
I'm happy to know that any clearly
On Mon, Oct 25, 2010 at 9:43 PM, Damick, Jeffrey
jeffrey.dam...@neustar.biz wrote:
Sure - so percents aren’t supported anymore in 0.7.x, which is fine, I just
wanted to clarify.
thanks
On 10/25/10 9:31 PM, Aaron Morton aa...@thelastpickle.com wrote:
To cache 100% set the value to 1. The
On Wed, Oct 20, 2010 at 11:15 AM, Potter,Lorne [Wpg]
lorne.pot...@ec.gc.ca wrote:
I have a 0.7beta2 four node cluster set up and a small Java program that
writes to a TimeUUIDType sorted column family and another program that polls
the database every x msecs to read the latest data. Instead of
On Wed, Oct 20, 2010 at 2:47 PM, CassUser CassUser cassu...@gmail.com wrote:
Hey,
As I understand it writes go directly to the commit log. Once a threshold
has been reached the data is shipped to a memtable, and again to an sstable.
1. How many memtables are created when a flush happens
2010/10/11 Héctor Izquierdo Seliva izquie...@strands.com:
Hi everyone.
I'm sure this question or similar has come up before, but I can't find a
clear answer. I have to store a unknown number of items in cassandra,
which can vary from a few hundreds to a few millions per customer.
I read
On Mon, Oct 11, 2010 at 9:53 AM, Henry Luo h...@choicestream.com wrote:
We have an application that does a lot of updates to the rows. We use
replication factor of 3 and are moving to multiple data centers. We would
like to accomplish the following setup:
Data are replicated to other data
On Sun, Oct 3, 2010 at 11:02 AM, Simon Reavely simon.reav...@gmail.com wrote:
Two questions:
1. So this compaction challenge is a CPU issue or a disk IO issue in your
case?
2. In other places people have recommended adjustments from the defaults to
control compaction overhead...did you
After nodetool move you have to run nodetool cleanup.
On Thu, Sep 30, 2010 at 3:45 PM, Rana Aich aichr...@gmail.com wrote:
I have arranged my initial tokens and get this result:
Address Status Load Range
Ring
17014118346046923173168730371588000
192.168.202.1 Up
On Sun, Sep 26, 2010 at 5:33 PM, Jonathan Ellis jbel...@gmail.com wrote:
It may be an indication of a lower-level problem in your cluster, e.g.
flakey network causing FD false positives causing writes to be
initially replicated to less than all 3 nodes.
On Sun, Sep 26, 2010 at 11:53 AM,
On Sat, Sep 18, 2010 at 9:26 AM, Peter Schuller
peter.schul...@infidyne.com wrote:
- performance (it should be not as much less than shard of MySQL and
scale linearly, we want to have not more that 10K inserts per second
of writes, and probably not more than 1K/s reads which will be mostly
On Mon, Sep 20, 2010 at 3:14 PM, Dathan Pattishall datha...@gmail.com wrote:
How do you set the compaction threshold from storage-conf.xml? is this
possible?
What is the consensus on a basic Key-Value store of setting the
compactionthreshold min/max from
./nodetool --host=localhost
On Mon, Sep 6, 2010 at 8:39 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Mon, Sep 6, 2010 at 4:04 PM, Edward Capriolo edlinuxg...@gmail.com wrote:
I was not aware of that. Also is the default for 6.o non framed and
7.o framed?
Yes.
I was thinking possibly replace cassanda.client detect
On Tue, Sep 7, 2010 at 5:10 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Tue, Sep 7, 2010 at 3:55 PM, B. Todd Burruss bburr...@real.com wrote:
using 0.7 latest from trunk as of few minutes ago. 1 client, 1 node
i have the scenario where i want to drop a column family and recreate it -
unit
Read repair chance looks to be an awesome feature. We have a pretty
high cache hit rate so I would assume read repair chance would reduce
a lot of bandwidth and disk activity across our cluster. Does anyone
have some statistics or experiences they want to share?
Edward
On Fri, Sep 3, 2010 at 9:22 AM, Viktor Jevdokimov
viktor.jevdoki...@adform.com wrote:
Hi,
We’re not setting cache capacity upon creation of Column Family, since the
type and capacity is unknown at that time. By default it = 0.
After Column Family has enough data and we could decide on
On Wed, Sep 1, 2010 at 4:42 PM, Peter Fales
peter.fa...@alcatel-lucent.com wrote:
I probably should have made it clear that I wasn't proposing this as
an official patch (as you point out, it's not general enough for
production use). I'm just looking for feedback on the concept (thanks!)
and
On Tue, Aug 31, 2010 at 4:06 PM, Jonathan Ellis jbel...@gmail.com wrote:
does http://wiki.apache.org/cassandra/DistributedDeletes and
http://wiki.apache.org/cassandra/MemtableSSTable help?
On Tue, Aug 31, 2010 at 3:04 PM, Dwight Smith
dwight.sm...@alcatel-lucent.com wrote:
Hi
I am
On Mon, Aug 30, 2010 at 12:40 PM, Dave Viner davevi...@pobox.com wrote:
FWIW - we've been using HAProxy in front of a cassandra cluster in
production and haven't run into any problems yet. It sounds like our
cluster is tiny in comparison to Anthony M's cluster. But I just wanted to
mentioned
On Fri, Aug 27, 2010 at 1:26 PM, Ran Tavory ran...@gmail.com wrote:
I haven't benchmarked so it's purely theoretical.
If there's no caching then I'm pretty sure just writing would yield better
performance.
If you do cache rows/keys it really depends on your hit ratio. Naturally if
you have a
On Fri, Aug 27, 2010 at 6:49 PM, Jonathan Ellis jbel...@gmail.com wrote:
I supsect something else is making the difference for ecapriolo. The
documentation says,
The incremental mode is meant to lessen the impact of long concurrent
phases by periodically stopping the concurrent phase to
On Tue, Aug 24, 2010 at 11:29 AM, Mikio Braun mi...@cs.tu-berlin.de wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Dear all,
thanks again for all the comments I got on my last post. I've played a
bit with different GC settings and got my Cassandra instance to run
very nicely with 8GB
On Sun, Aug 22, 2010 at 7:11 AM, Wayne wav...@gmail.com wrote:
Currently each node has 4x1TB SATA disks. In MySQL we have 15tb currently
with no replication. To move this to Cassandra replication factor 3 we need
45TB assuming the space usage is the same, but it is probably more. We had
On Thu, Aug 19, 2010 at 2:48 PM, Wayne wav...@gmail.com wrote:
I am having some serious problems keeping a 6 node cluster up and running
and stable under load. Any help would be greatly appreciated.
Basically it always comes back to OOM errors that never seem to subside.
After 5 minutes or 3
in term of GC.
Thanks.
On Thu, Aug 19, 2010 at 9:44 PM, Edward Capriolo edlinuxg...@gmail.com
wrote:
On Thu, Aug 19, 2010 at 2:48 PM, Wayne wav...@gmail.com wrote:
I am having some serious problems keeping a 6 node cluster up and
running
and stable under load. Any help would be greatly
On Thu, Aug 19, 2010 at 4:49 PM, Wayne wav...@gmail.com wrote:
What is my live set? Is the system CPU bound given the few statements
below? This is from running 4 concurrent processes against the node...do I
need to throttle back the concurrent read/writers?
I do all reads/writes as Quorum.
On Wed, Aug 18, 2010 at 10:51 AM, Jonathan Ellis jbel...@gmail.com wrote:
If you read the stack traces you pasted, the node in question ran out
of diskspace. When you have 25% space free this is not surprising.
But fundamentally you are missing something important from your story
here.
On Tue, Aug 17, 2010 at 1:55 PM, Artie Copeland yeslinux@gmail.com wrote:
if i set a key cache size of 100% the way i understand how that works is:
- the cache is not write through, but read through
- a key gets added to the cache on the first read if not already available
- the size of
On Tue, Aug 17, 2010 at 10:55 PM, Chen Xinli chen.d...@gmail.com wrote:
Hi,
We are going to use cassandra for searching purpose like inbox search.
The reading qps is very high, we'd like to use ConsitencyLevel.One for
reading and disable read-repair at the same time.
For reading consistency
Hello,
Anyone interested in doing map/reduce on Cassandra data should take a
look at Cassandra Storage Handler for Hive. Storage handlers give Hive
the ability to work with data outside HDFS in a more natural way.
Support is now in place for reading and writing to/from Standard
Column Families
On Sunday, August 15, 2010, S Ahmed sahmed1...@gmail.com wrote:
For CF that I need to perform range scans on, I create separate CF that have
custom ordering.
Say a CF holds comments on a story (like comments on a reddit or digg story
post)
So if I need to order comments by votes, it seems I
Hello all,
I recently posted on list about a situation where two of my nodes from
my 16 node were garbage collecting and at ooming. I was able to move
my xmx from 9gb to 11gb to see that rather then my memory saw tooth. I
would saw tooth around 4 gb before memory shot up like a rocket.
After
I have a 16 node 6.3 cluster and two nodes from my cluster are giving
me major headaches.
10.71.71.56 Up 58.19 GB
10827166220211678382926910108067277| ^
10.71.71.61 Down 67.77 GB
123739042516704895804863493611552076888v |
10.71.71.66 Up 43.51 GB
On Mon, Aug 9, 2010 at 8:20 PM, Jonathan Ellis jbel...@gmail.com wrote:
what does tpstats or other JMX monitoring of the o.a.c.concurrent stages show?
On Mon, Aug 9, 2010 at 4:50 PM, Edward Capriolo edlinuxg...@gmail.com wrote:
I have a 16 node 6.3 cluster and two nodes from my cluster
On Tue, Aug 3, 2010 at 10:47 AM, Maciej Lisowski
m.lisow...@powerprice.pl wrote:
Hi all,
I’m new here and new with Cassandra and I’ve got problem to run it (v.
0.6.4) with jdk1.6.0_21.
When I type “cassandra” to run it I get error:
ERROR 16:23:53,803 Uncaught exception in thread
On Tue, Aug 3, 2010 at 11:44 AM, Edward Capriolo edlinuxg...@gmail.com wrote:
On Tue, Aug 3, 2010 at 10:47 AM, Maciej Lisowski
m.lisow...@powerprice.pl wrote:
Hi all,
I’m new here and new with Cassandra and I’ve got problem to run it (v.
0.6.4) with jdk1.6.0_21.
When I type “cassandra
On Mon, Aug 2, 2010 at 9:11 AM, john xie shanfengg...@gmail.com wrote:
ReplicationFactor = 3
one day i stop 192.168.1.147 and remove cassandra data by mistake, can i
recover 192.168.1.147's cassadra data by restart cassandra ?
DataFileDirectories
On Tue, Jul 27, 2010 at 11:49 AM, uncle mantis uncleman...@gmail.com wrote:
Ah S**T! The Pooh server is is down again! =)
What does one do if they run out of themed names?
Regards,
Michael
On Tue, Jul 27, 2010 at 10:46 AM, Brett Thomas brettptho...@gmail.com
wrote:
I like names of
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