Hi,
I trying to switch from a RF = 1 to a RF = 3, but I get wrong values from
counters when doing so...
I got a CF that contains many counters of some events. When I'm at RF = 1
and simulate 10 events, they are well counted.
However, when I switch to a RF = 3, my counter show a wrong value that
)
counter.increment (v=3)
counter.getValue = returns 7
counter.getValue = returns 7
counter.getValue = returns 7
or something inconsistent like that?
On Mon, Nov 7, 2011 at 9:09 AM, Alain RODRIGUEZ arodr...@gmail.comwrote:
I've tried with CL.All, but it doesn't wotk better. I still have strange
, Alain RODRIGUEZ arodr...@gmail.comwrote:
I retried it after restarting all the servers.
I still have wrong results (I simulated an event 5 times and it was
counted 3 times by some counters 4 or 5 times by others.
What I meant by but now every request returns me always the same count
value
Hi,
I faced a similar issue as described there :
http://comments.gmane.org/gmane.comp.db.cassandra.user/11184.
I was running Cassandra 1.0.0 with a 3 node cluster on 3 t1.micro from
Amazon EC2.
I have no error in cassandra logs, but an OOM in /var/log/kern.log which
put one of my nodes down.
Hi, I'm running a 3 node cassandra 1.0.2 cluster on 3 Amazon EC2 t1.micro.
I managed to fix some OOM I had, but I still have some spike of cpu load.
I know that t1.micro have small resources, but I think it could be enough
if they were well managed.
My application works well, excepted when
I think taht it depends on your partitioner. With an OPP you will have this
behaviour. With a RP you won't have this behaviour. The hash randomize the
keys, which is exactly its job to be sure that even if you are storing
sequences you won't create hot spots.
Alain
2011/11/21 Kent Tong
(cassandra.yaml)
as low as you possibly can (1 is the minimum I believe), try disabling
hinted handoff (on all nodes), and use lower read/write consistency levels
if you can.
** **
Dan
** **
*From:* Alain RODRIGUEZ [mailto:arodr...@gmail.com]
*Sent:* November-15-11 6:34
*To:* user
. start by turning
compaction_throughput_mb_per_sec all the way down to 1MB/s.
On Tue, Nov 22, 2011 at 9:58 AM, Alain RODRIGUEZ arodr...@gmail.com
wrote:
I followed your advice and install a 3 m1.small instance cluster. The
problem is still there. I've got less timeouts because I have less
http://www.datastax.com/docs/1.0/operations/cluster_management#changing-the-replication-factor
It looks like a nodetool repair is needed after increasing your RF. I guess
that a cleanup has to be performed after decreasing the RF to remove
useless replica.
Alain
2011/12/5 A J s5a...@gmail.com
You should be able to use the CLI show schema yourkeyspace if your
cassandra is recent enough ( = 0.8 if I remember well. I think it is
better if you are in 0.8.7 because this command was fixed a couple of times
in 8.6 and 8.7).
You can put the show schema command into a file and call it with :
Hi, I'm running a 4 nodes Cassandra cluster, and I'm facing the same
problem (node not present on nodetool ring, but unreachable on CLI describe
cluster...). I'm currently running version 1.0.2, but I have update from
0.8.x, the problem may exist since a while, I don't really know. I can't
stop my
By the way, nice comment on the patch // do not pass go, do not collect
200 dollars, just gtfo, it looks like you have some fun while developping
Cassandra @Datastax ;)
Alain
2011/12/9 Alain RODRIGUEZ arodr...@gmail.com
Hi, I'm running a 4 nodes Cassandra cluster, and I'm facing the same
it.
** **
Thanks
Michael
** **
*From:* Alain RODRIGUEZ [mailto:arodr...@gmail.com]
*Sent:* Thursday, December 08, 2011 11:52 AM
*To:* user@cassandra.apache.org
*Subject:* Re: Schematool
** **
You should be able to use the CLI show schema yourkeyspace if your
cassandra
Hi, this reminds me a problem I had with a truncate.
I think that to show schema, you're cluster must be stable and your schema
agreed across the cluster.
See if your cluster is really the one described by your nodetool ring and
if the same schema is present on each node.
You should visit this
Hi everybody.
I'm using a lot of counters to make statistics on a 4 nodes cluster (ec2
m1.small) with phpcassa (cassandra v1.0.2).
I store some events and increment counters at the same time.
Counters give me over-counts compared with the count of every corresponding
events.
I sure that my
, Alain RODRIGUEZ arodr...@gmail.comwrote:
Hi everybody.
I'm using a lot of counters to make statistics on a 4 nodes cluster (ec2
m1.small) with phpcassa (cassandra v1.0.2).
I store some events and increment counters at the same time.
Counters give me over-counts compared with the count
By the way, I wonder if a rolling restart is still possible when I am using
counters ? Don't we lose the SPOF too, considering that counters are wrong
every time we retry to write them with the client ?
2011/12/16 Alain RODRIGUEZ arodr...@gmail.com
Can we have a hope that counters
Anything new about this ?
I'm specifically interestead in the Joe Stein (Medialets) talk about how to
manage real-time multidimensional metrics.
2011/12/10 Jonathan Ellis jbel...@gmail.com
Not yet -- we're working on it.
On Fri, Dec 9, 2011 at 1:48 PM, Brian O'Neill b...@alumni.brown.edu
Hello.
I have a 4 nodes cluster running Cassandra (without Datastax Brisk) in
production.
Now I want to add hadoop (and maybe Pig / Hive ?) to be able to perform
some analytics.
I don't know how to get started ? Is there a tutorial explaining how to
install, configure and use hadoop
As this option is in the cassandra.yaml file, you might need to perform a
restart of your entire cluster (a rolling restart should work).
Hope this will help.
Alain
2012/1/18 Michael Vaknine micha...@citypath.com
Hi,
I am configured to do incremental backups on all my node on the
I'm wondering how to modelize my CFs to store the number of unique visitors
in a time period in order to be able to request it fast.
I thought of sharding them by day (row = 20120118, column = visitor_id,
value = '') and perform a getcount. This would work to get unique visitors
per day, per week
Lucas de Souza Santos lucas...@gmail.com
Why not http://www.countandra.org/
Lucas de Souza Santos (ldss)
On Wed, Jan 18, 2012 at 3:23 PM, Alain RODRIGUEZ arodr...@gmail.comwrote:
I'm wondering how to modelize my CFs to store the number of unique
visitors in a time period in order to be able
/cassandra-nyc-2011-data-modeling
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 19/01/2012, at 10:30 PM, Alain RODRIGUEZ wrote:
Hi thanks for your answer but I don't want to add more layer on top of
Cassandra. I also have done all of my
If you want to try any others UI to browse your Cassandra data I can
suggest you 2 :
- https://github.com/sebgiroux/Cassandra-Cluster-Admin
- http://code.google.com/p/cassui/
The first one is built to be a phpMyAdmin Like.
Alain
2012/1/31 Brandon Williams dri...@gmail.com
On Sun, Jan 29,
Help yourself : http://wiki.apache.org/cassandra/FAQ#unsubscribe
Alain
2012/2/3 francesco.tangari@gmail.com
lol
--
francesco.tangari@gmail.com
Inviato con Sparrow http://www.sparrowmailapp.com/?sig
Il giorno venerdì 3 febbraio 2012, alle ore 14.51, Larry Liu ha scritto:
Please
Hi,
1 - I would like to generate some statistics and store some raw events from
log files tailed with flume. I saw some plugins giving Cassandra sinks but
I would like to store data in a custom way, storing raw data but also
incrementing counters to get near real-time statistcis. How to do it ?
/#_buffered_sink_and_decorator_semantics
Hope that helps.
A
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 10/02/2012, at 4:27 AM, Alain RODRIGUEZ wrote:
Hi,
1 - I would like to generate some statistics and store some raw events
from log files tailed
Tanks for all these informations. Twitter Kestrel-Storm-Cassandra solution
looks very powerfull, scalable and well documented. I'll try to use this
solution.
Alain
2012/2/23 Milind Parikh milindpar...@gmail.com
Coolwww.countandra.org calls them cascaded counters and it will be
also based
Did everything go well with your update ?
Do the version 1.0.8 worth the risk of an update?
Alain
2012/3/11 Tamar Fraenkel ta...@tok-media.com
Thanks! will check it in the following days :)
*Tamar Fraenkel *
Senior Software Engineer, TOK Media
[image: Inline image 1]
It looks like Cassandra is not able to find your existing cluster.
Do you use the same name of cluster in the 2 nodes ?
Are you able to contact the existing node on port 7000 from the new node ?
Is the first node defined as a seed in the cassandra.yaml of your 2 nodes ?
If you can't make a
Sylvain explained a lot of things about counters at Cassandra SF 2011 :
http://blip.tv/datastax/counters-in-cassandra-5497678 (video),
http://www.datastax.com/wp-content/uploads/2011/07/cassandra_sf_counters.pdf(slides).
I think it is always important knowing how the things work.
Alain
2012/4/3
Hi, I'm experimenting a strange and very annoying phenomena.
I had a problem with the commit log size which grew too much and full one
of the hard disks in all my nodes almost at the same time (2 nodes only,
RF=2, so the 2 nodes are behaving exactly in the same way)
My data are mounted in an
By the way, I am using Cassandra 1.0.7, CL = ONE (R/W), RF = 2, 2 EC2
c1.medium nodes cluster
Alain
2012/4/10 Alain RODRIGUEZ arodr...@gmail.com
Hi, I'm experimenting a strange and very annoying phenomena.
I had a problem with the commit log size which grew too much and full one
of the hard
are not idempotent. If you client retries a counter
operation it may result in the increment been applied twice. Could this
have been your issue ?
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 11/04/2012, at 2:35 AM, Alain RODRIGUEZ
Did you mean unsubscribe ?
One more time : http://wiki.apache.org/cassandra/FAQ#unsubscribe.
Message to all : You can unsubscribe, that's up to you, but please stop
flooding people that continue using this mailing list.
Alain
2012/5/2 Daniel Gimenez danie...@gmail.com
Hi, I guess you finally solved this issue. I'm experimenting the same one
when trying to upgrade to phpcass 1.0.a.1.
Do you remember how you fixed it or what the problem was exactly ?
Thanks,
Alain
2011/12/19 Tamil selvan R.S tamil.3...@gmail.com
Hi,
We are using PHPCassa to connect to
:)
Alain
2012/5/11 Alain RODRIGUEZ arodr...@gmail.com
Hi, I guess you finally solved this issue. I'm experimenting the same one
when trying to upgrade to phpcass 1.0.a.1.
Do you remember how you fixed it or what the problem was exactly ?
Thanks,
Alain
2011/12/19 Tamil selvan R.S tamil.3
and calling get()?
On Fri, May 11, 2012 at 8:16 AM, Alain RODRIGUEZ arodr...@gmail.com wrote:
I got the error above in cassandra logs.
In my web browser I have the following error :
500 | Internal Server Error | TApplicationException
Required field 'reversed' was not found in serialized data
Hi,
I'm using a 2 node cluster in production ( 2 EC2 c1.medium, CL.ONE, RF
= 2, using RP)
1 - I got this kind of message quite often (let's say every 30 seconds) :
WARN [ScheduledTasks:1] 2012-05-15 15:44:53,083 GCInspector.java (line
145) Heap is 0.8081418550931491 full. You may need to
Using c1.medium, we are currently able to deliver the service.
What is the the benefit of having more memory ? I mean, I don't
understand why having 1, 2, 4, 8 or 16 GB of memory is so different.
In my mind, Cassandra will fill the heap and from then, start to flush
and compact to avoid OOMing
commitlog_total_space_in_mb: 4096
By default this line is commented in 1.0.x if I remember well. I guess
it is the same in 1.1. You really should remove this comment or your
commit logs will entirely fill up your disk as it happened to me a
while ago.
Alain
2012/5/21 Pieter Callewaert
* reduce column_index_size_in_kb
* reduce in_memory_compaction_limit_in_mb
* increase index_interval
* set concurrent_compactors to 2
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 17/05/2012, at 12:40 AM, Alain RODRIGUEZ wrote
Hi, I re-post this here because it's a new subject far away from my
initial tuning questions.
I wanted to try a new config. After doing a rolling restart I have all
my counters false, with wrong values. I stopped my servers with the
following :
nodetool -h localhost disablegossip
nodetool -h
Here are my 2 nodes starting logs, I hop it can help...
https://gist.github.com/2762493
https://gist.github.com/2762495
Alain
2012/5/21 Alain RODRIGUEZ arodr...@gmail.com:
Hi, I re-post this here because it's a new subject far away from my
initial tuning questions.
I wanted to try a new
not sure what you mean by
And after restarting the second one I have lost all the consistency of
my data. All my statistics since September are totally false now in
production
Can you give some examples?
After restarting my 2 nodes (one after the other), All my counters
have become wrong. The
, at 12:42 AM, Alain RODRIGUEZ wrote:
not sure what you mean by
And after restarting the second one I have lost all the consistency of
my data. All my statistics since September are totally false now in
production
Can you give some examples?
After restarting my 2 nodes (one after the other
I have the same error with the last Datastax AMI (1.0.9). Is that the same bug ?
Requested snapshot for: cassa_teads
Exception in thread main java.io.IOError: java.io.IOException:
Unable to create hard link from
/raid0/cassandra/data/cassa_teads/stats_product-hc-233-Index.db to
You are using the Random Partitioner.
Using the RP is a good thing because you avoid hot spots, but it has
its defaults too. You can't scan a slice of row, they won't be ordered
because all your keys are stored using their md5 values.
You should review your data model to use columns to order
:27 PM, Alain RODRIGUEZ wrote:
I have the same error with the last Datastax AMI (1.0.9). Is that the same
bug ?
Requested snapshot for: cassa_teads
Exception in thread main java.io.IOError: java.io.IOException:
Unable to create hard link from
/raid0/cassandra/data/cassa_teads/stats_product-hc
this need a restart ?
Alain
2012/6/13 Alain RODRIGUEZ arodr...@gmail.com:
Hi Aaron,
We are using Ubuntu (AMI Datastax 1.0.9 as I said).
Release: 10.10
Codename: maverick
ERROR [RMI TCP Connection(37732)-10.248.10.94] 2012-06-13 15:00:17,157
CLibrary.java (line 153) Unable
/Support
On Wed, Jun 13, 2012 at 10:28 AM, Alain RODRIGUEZ arodr...@gmail.com
wrote:
if I do : locate jna
/opt/java/64/jdk1.6.0_31/db/docs/html/ref/rrefsqljnaturaljoin.html
/root/.m2/repository/net/java/dev/jna
/root/.m2/repository/net/java/dev/jna/jna
/root/.m2/repository/net/java/dev/jna/jna
...@palominodb.com:
On Tue, Jun 19, 2012 at 8:55 PM, Rob Coli rc...@palominodb.com wrote:
On Tue, Jun 19, 2012 at 2:55 AM, Alain RODRIGUEZ arodr...@gmail.com wrote:
Unable to create hard link from
/raid0/cassandra/data/cassa_teads/stats_product-hc-233-Data.db to
/raid0/cassandra/data/cassa_teads/snapshots
Hi,
I'm trying to do the following : update keyspace.CF set '2' = '2' + 12
WHERE KEY = 'mykey';
And got this answer: Bad Request: cannot parse 'mykey' as
hex bytes
Using this doesn't help: assume keyspace.CF(KEY) VALUES ARE
text; (Found here
Hi,
I tried to add a node a few days ago and it failed. I finally made it
work with an other node but now when I describe cluster on cli I got
this :
Cluster Information:
Snitch: org.apache.cassandra.locator.Ec2Snitch
Partitioner: org.apache.cassandra.dht.RandomPartitioner
Schema
removetoken (via nodetool) to remove the token associated with
10.56.62.211. in case of failure, you can use removetoken -f instead.
then, the unreachable IP should have disappeared.
HTH
On Thu, Jul 19, 2012 at 10:38 AM, Alain RODRIGUEZ arodr...@gmail.com
wrote:
Hi,
I tried to add a node
and it went
fine. Next I decommissionned the node 10.248.10.94 and moved
10.59.21.241 to the token 0.
Now I am on the situation described before.
Alain
2012/7/19 Alain RODRIGUEZ arodr...@gmail.com:
Hi, I wasn't able to see the token used currently by the 10.56.62.211
(ghost node).
I already
On 19/07/2012, at 9:37 PM, Alain RODRIGUEZ wrote:
Not sure if this may help :
nodetool -h localhost gossipinfo
/10.58.83.109
RELEASE_VERSION:1.1.2
RACK:1b
LOAD:5.9384978406E10
SCHEMA:e7e0ec6c-616e-32e7-ae29-40eae2b82ca8
DC:eu-west
STATUS:NORMAL
Does anyone knows how to totally remove a dead node that only appears
when doing a describe cluster from the cli ?
I still got this issue in my production cluster.
Alain
2012/7/20 Alain RODRIGUEZ arodr...@gmail.com:
Hi Aaron,
I have repaired and cleanup both nodes already and I did it after
Hi again,
Nobody has a clue about this issue ?
I'm still facing this problem.
Alain
2012/7/23 Alain RODRIGUEZ arodr...@gmail.com:
Does anyone knows how to totally remove a dead node that only appears
when doing a describe cluster from the cli ?
I still got this issue in my production
Hi sorry about reopening this old thread but I think that this
function (unsafeAssassinateEndpoint) can help me to resolve a problem
I have in production for a while :
http://grokbase.com/t/cassandra/user/127knx7nn0/unreachable-node-not-in-nodetool-ring
I have no Idea about how to use it, Can
Cassandra modeling is well documented on the web and a bit too complex
to be explained in one mail.
I advice you reading a lot before you make modeling choices.
You may start with these links :
Hi,
I finally successfully removed the ghost node using
unsafeAssassinateEndpoint() as described there :
http://tumblr.doki-pen.org/post/22654515359/assinating-cassandra-nodes,
I hope this can help more people.
Nodetool gossipinfo gives me now the following info for the ghost node :
I have the same configuration and I recently change my cassandra-sh.yaml
to :
MAX_HEAP_SIZE=4G
HEAP_NEWSIZE=200M
I guess it depends on how much you use the cache (which is now in the
off-heap memory).
I don't use row cache and use the default key cache size.
I have no more memory pressure nor
[image: Inline image 1]
ta...@tok-media.com
Tel: +972 2 6409736
Mob: +972 54 8356490
Fax: +972 2 5612956
On Tue, Aug 21, 2012 at 12:57 PM, Alain RODRIGUEZ arodr...@gmail.comwrote:
I have the same configuration and I recently change my cassandra-sh.yaml
to :
MAX_HEAP_SIZE=4G
://www.thelastpickle.com
On 23/04/2013, at 7:26 PM, Alain RODRIGUEZ arodr...@gmail.com wrote:
Hi,these advice are very welcome.
@Dane, about the rack awareness, we use only one rack per DC, so I guess
using EC2MultiRegionSnitch will do just fine and it doesn't need any
configuration. Does
Hi, I tried to delete some columns using cql2 as well as thrift on C*1.2.2
and instead of being unreachable, deleted columns have a null value.
I am using no value in this CF, the only information I use is the existence
of the column. So when I select all the column for a given key I have the
sor...@gmail.com
On 2013-04-25 11:48, Alain RODRIGUEZ wrote:
Hi, I tried to delete some columns using cql2 as well as thrift on
C*1.2.2 and instead of being unreachable, deleted columns have a null
value.
I am using no value in this CF, the only information I use is the
existence
I just asked this exact same question but after maybe after reading a bit
more doc than you did. You may want to read this thread:
http://grokbase.com/t/cassandra/user/134j85av4x/ec2snitch-to-ec2multiregionsnitch
You also may want to read some doc. Datastax explain things quite well and
update
I copied the wrong query:
In CQL 2 it was:
delete '1228#16857','1228#16866','1228#16875' from myCF where key = 'all';
Sorry about the mistake.
2013/4/26 Alain RODRIGUEZ arodr...@gmail.com
Of course:
From CQL 2 (cqlsh -2):
delete '183#16684','183#16714','183#16717' from myCF where key
This seems to be the correct behavior. An update refreshes the TTL, as it
does in memcache for example. Yet, what I do not know is whether this
behavior can be changed somehow to let the initial TTL, this might be
useful on some use cases.
Alain
2013/4/26 Shahryar Sedghi shsed...@gmail.com
That is more or less what I was guessing, thanks for these precision.
2013/4/26 Sylvain Lebresne sylv...@datastax.com
This is indeed intended. That behavior is largely dictated by how the
storage engine works, and the fact that an update does no read internally
in particular.
Yet, what I
Zealand
@aaronmorton
http://www.thelastpickle.com
On 27/04/2013, at 12:48 AM, Sorin Manolache sor...@gmail.com wrote:
On 2013-04-26 11:55, Alain RODRIGUEZ wrote:
Of course:
From CQL 2 (cqlsh -2):
delete '183#16684','183#16714','183#16717' from myCF where key = 'all';
And selecting
Well, maybe should you describe us your hardware and the C* release toi are
using. Also give us some metrics.
Le 30 avr. 2013 18:48, Steppacher Ralf
ralf.steppac...@derivativepartners.com a écrit :
Hi,
I have troubles finding some quantitative information as to how a healthy
Cassandra node
Hi Rob,
1) 1.2.2 on 6 to 12 EC2 m1.xlarge
2) Quorum RW . Almost no deletes (just some TTL)
3) Yes
4) On each node once a week (rolling repairs using crontab)
5) The only behavior that is quite odd or unexplained to me is why a repair
doesn't fix a counter mismatch between 2 nodes. I mean when I
on CL_QUOROM instead of just one (as itself was one as well)
or something like that. (I don't know too much as my colleague was the one
that debugged this issue)
Dean
From: Alain RODRIGUEZ arodr...@gmail.commailto:arodr...@gmail.com
Reply-To: user@cassandra.apache.orgmailto:user@cassandra.apache.org
Not sure to understand you correctly, but if you are dealing with ghost
nodes that you want to remove, I never saw a node that could resist to an
unsafeAssassinateEndpoint.
http://grokbase.com/t/cassandra/user/12b9eaaqq4/remove-crashed-node
”, but
they all required some form of user intervention. Riak 1.3 introduces
automatic, self-healing properties that repair entropy on an ongoing basis.
On Wed, May 15, 2013 at 5:32 PM, Robert Coli rc...@eventbrite.com wrote:
On Wed, May 15, 2013 at 1:27 AM, Alain RODRIGUEZ arodr...@gmail.com
wrote:
Rob
Hi,
Adding vnodes is a big improvement to Cassandra, specifically because we
have a fluctuating load on our Cassandra depending on the week, and it is
quite annoying to add some nodes for one week or two, move tokens and then
having to remove them and then move tokens again. Even more if we could
, Alain RODRIGUEZ arodr...@gmail.com
wrote:
Rob, I was wondering something. Are you a commiter working on
improving the
repair or something similar ?
I am not a committer [1], but I have an active interest in potential
improvements to the best practices for repair. The specific change
that I
Hi.
I think that the unsafeAssassinateEndpoint was the good solution here. I
was going to lead you to this solution after reading the first part of your
message.
Does anyone know why the dead nodes still appear when we run nodetool
gossipinfo but they don't when we run describe cluster from the
an eye on
it then.
Many thanks,
Vasilis
On Wed, May 22, 2013 at 10:54 AM, Alain RODRIGUEZ arodr...@gmail.comwrote:
Hi.
I think that the unsafeAssassinateEndpoint was the good solution here.
I was going to lead you to this solution after reading the first part of
your message.
Does
Hi,
I have an issue since switch to multiple DC. I use AWS EC2 instances,
C*1.2.2, 12 nodes eu-west + 6 nodes us-east (new DC).
Datacenter: eu-west
===
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Owns Host ID
UN public ip 133.43
I see a lot of hinted handoff compactions too.
I might have not been clear enough, I see a lot of compaction of
system.hints that I interpret as being due to a lot of data that couldn't
reach their destination.
2013/6/4 Alain RODRIGUEZ arodr...@gmail.com
Hi,
I have an issue since switch
Hi,
We use to work on a single DC (EC2Snitch / SimpleStrategy). For latency
reason we had top open a new DC in the US (us-east). We run C* 1.2.2. We
don't use VPC.
Now we use:
- 2 DC (eu-west, us-east)
- EC2MultiRegionSnitch / NTS
- public IPs as broadcast_address and seeds
- private IPs as
DC need access over both public and private IP on the
storage port (7000/7001). Nodes from other DC will need access over public
IP on the storage port.
All Cassandra nodes also need access over the public IP on the Thrift port
(9160).
** **
Dan
** **
*From:* Alain
Not sure if you remember this Jonathan, but Sylvain already wrote a very
clear documentation about it :
http://www.datastax.com/dev/blog/thrift-to-cql3 (OCTOBER 26, 2012)
Yet a second page will give to this important topic a greater visibility.
2013/6/6 Jonathan Ellis jbel...@gmail.com
This
But afaik you can set the RF only per Keyspace. So you will have to pull
those tables apart, in a different Keyspace.
2013/6/6 Tyler Hobbs ty...@datastax.com
On Thu, Jun 6, 2013 at 1:28 PM, Daning Wang dan...@netseer.com wrote:
could we set replication factor to 0 on other data center? what
I think he actually meant *increase*, for this reason For small T, a
random choice of initial tokens will in most cases give a poor distribution
of data. The larger T is, the closer to uniform the distribution will be,
with increasing probability.
Alain
2013/6/11 Theo Hultberg t...@iconara.net
counter will replicate to all replicas during write regardless the
consistency level
I that the normal behavior or a bug ?
2013/6/11 Daning Wang dan...@netseer.com
It is counter caused the problem. counter will replicate to all replicas
during write regardless the consistency level.
In our
We run it concurrently each RF nodes (If RF = 3, we run it on 3 waves). If
the node is busy cleaning up, then the client will time out and ask to an
other node having a copy of the data and that is not being cleaned up.
Will node tool cleanup consume lot of IO and CPU even though there is
nothing
12, 2013 at 4:56 AM, Alain RODRIGUEZ arodr...@gmail.comwrote:
counter will replicate to all replicas during write regardless the
consistency level
I that the normal behavior or a bug ?
2013/6/11 Daning Wang dan...@netseer.com
It is counter caused the problem. counter will replicate to all
replicas. The consistency level only decides
how replica acknowledgement are waited for.
--
Sylvain
On Wed, Jun 12, 2013 at 4:56 AM, Alain RODRIGUEZ arodr...@gmail.comwrote:
counter will replicate to all replicas during write regardless the
consistency level
I that the normal behavior
as the
source.
** **
*From:* Alain RODRIGUEZ [mailto:arodr...@gmail.com]
*Sent:* Wednesday, June 05, 2013 5:45 PM
*To:* user@cassandra.apache.org
*Subject:* Re: Looking for a fully working AWS multi DC configuration.
** **
Do you open all these nodes one by one on every Security Group
Any insights on vnodes, one month after my original post ?
2013/5/16 Alain RODRIGUEZ arodr...@gmail.com
Hi,
Adding vnodes is a big improvement to Cassandra, specifically because we
have a fluctuating load on our Cassandra depending on the week, and it is
quite annoying to add some nodes
Good, fast and appreciated reaction from Datastax.
Also thanks to Radim for the warning.
Alain, Opscenter-free user.
2013/6/20 Nick Bailey n...@datastax.com
Thanks everyone. We always appreciate constructive criticism.
Regarding what OpsCenter collects, we completely agree it should be
@Michal: all true, a clean up would certainly remove a lot of useless data
there, and I also advice Evan to do it. However, Evan may want to continue
repairing his cluster as a routine operation an there is no reason a RF
change shouldn't lead to this kind of issues.
@Evan : With this amount of
Hi,
Using C*1.2.2 12 EC2 xLarge cluster.
When I restart a node, if it spend a few minutes down, when I bring it up,
all the cpu are blocked at 100%, even once compactions are disabled,
inducing a very big and intolerable latency in my app. I suspect Hinted
Handoff to be the cause of this.
.
How to avoid this Hinted Handoff flood on returning nodes ?
Alain
2013/7/4 Alain RODRIGUEZ arodr...@gmail.com
Hi,
Using C*1.2.2 12 EC2 xLarge cluster.
When I restart a node, if it spend a few minutes down, when I bring it up,
all the cpu are blocked at 100%, even once compactions
Hi,
C*1.2.2.
I have removed 4 nodes with nodetool decommission. 2 of them have left
with no issue, while the 2 others nodes remained leaving even after
streaming their data.
The only specific thing of these 2 nodes is that they had a lot of hints
pending. Hints from a node that couldn't come
Hi,
Using C*1.2.2.
We recently dropped our 18 m1.xLarge (4CPU, 15GB RAM, 4 Raid-0 Disks)
servers to get 3 hi1.4xLarge (16CPU, 60GB RAM, 2 Raid-0 SSD) servers
instead, for about the same price.
We tried it after reading some benchmark published by Netflix.
It is awesome and I recommend it to
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