Thanks for the suggestion Aaron, unfortunately, that seems to do
absolutely nothing:
# nodetool -h localhost repair
INFO [RMI TCP Connection(160)-127.0.0.1] 2012-03-16 06:15:13,718
StorageService.java (line 1770) Starting repair command #1, repairing 1
ranges.
INFO [AntiEntropySessions:1] 2012-
The documentation is correct.
I was mistakenly remembering discussions in the past about RF > #nodes.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 16/03/2012, at 4:34 AM, Doğan Çeçen wrote:
>> I'm not sure why this is not allowed. As l
Thanks for the comments, I guess I will end up doing a 2 node cluster with
replica count 2 and read consistency 1.
-- Drew
On Mar 15, 2012, at 4:20 PM, Thomas van Neerijnen wrote:
> So long as data loss and downtime are acceptable risks a one node cluster is
> fine.
> Personally this is usual
You should see a log line with "Index build of {} complete".
You can also see which indexes are built using the describe command in
cassandra-cli.
-
Aaron Morton[default@XX] describe;
Keyspace: XX:
...
Column Families:
ColumnFamily: XXX
...
Built indexes: [
trying running nodetool repair on 10.80.161.101 and then cleanup on
10.102.37.168 if everything is ok.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 16/03/2012, at 6:45 AM, Thorsten von Eicken wrote:
> I added a second node to a single-
> Given atomicity is not possible, it is ok for a brief period of
> inconsistency but I cannot afford permanent inconsistency for even a
> single successful or timed-out write.
Even when using a strongly consistent CL level you may still get logical
inconsistencies if your batch_mutation fails wi
update column family with LCS option + upgradesstables should convert all of
your sstables.
Set lig4j config:
org.apache.cassandra.db.compaction=DEBUG
in conf/log4j-server.properties and retry your procedure to find what is happen.
maki
On 2012/03/16, at 7:05, Johan Elmerfjord wrote:
> Hi, I'
We were having some occasional memory pressure issues, but we just added some
more RAM a few days ago to the nodes and things are running more smoothly now,
but in general nodes have not been going up and down.
I tried to do a "list HintsColumnFamily" from Cassandra-cli and it locks my
Cassandr
So long as data loss and downtime are acceptable risks a one node cluster
is fine.
Personally this is usually only acceptable on my workstation, even my dev
environment is redundant, because servers fail, usually when you least want
them to, like for example when you've decided to save costs by wai
Heya
I'd suggest staying away from Leveled Compaction until 1.0.9.
For the why see this great explanation I got from Maki Watanabe on the
list:
http://mail-archives.apache.org/mod_mbox/cassandra-user/201203.mbox/%3CCALqbeQbQ=d-hORVhA-LHOo_a5j46fQrsZMm+OQgfkgR=4rr...@mail.gmail.com%3E
Keep an eye o
Sorry for that last message, I was confused because I thought I needed to
use the DseSimpleSnitch but of course I can use the PropertyFileSnitch and
that allows me to get the configuration with 3 data centers explained.
Cheers,
Alex
On Thu, Mar 15, 2012 at 10:56 AM, Alexandru Sicoe wrote:
> Tha
Hi, I'm testing the community-version of Cassandra 1.0.8.
We are currently on 0.8.7 in our production-setup.
We have 3 Column Families that each takes between 20 and 35 GB on disk
per node. (8*2 nodes total)
We would like to change to Leveled Compaction - and even try compression
as well to reduce
Hi,
I'm using a 4 node cassandra cluster running 0.8.10 with rf=3. Its a brand
new setup.
I have a single col family which contains about 10 columns. I have enabled
secondary indices on 3 of them. I used sstableloader to bulk load some data
into this cluster.
I poked around the logs and saw the fol
Hi Drew,
One other disadvantage is the lack of "consistency level" and
"replication". Both ware part of the high availability / redundancy. So you
would really need to backup your single-node-"cluster" to some other
external location.
Good luck!
2012/3/15 Drew Kutcharian
> Hi,
>
> We are worki
DataStax is looking for an Instructor to conduct training courses for
Apache Cassandra. Details and requirements for this position can be
found in the link below [1]. Depending on where you live the position
may require a substantial amount of travel. If you are interested in
the position, or you w
I added a second node to a single-node ring. RF=1. I can't get the new
node to receive any data. Logs look fine. Here's what nodetool reports:
# nodetool -h localhost ring
Address DC RackStatus State Load
OwnsToken
Hi,
We are working on a project that initially is going to have very little data,
but we would like to use Cassandra to ease the future scalability. Due to
budget constraints, we were thinking to run a single node Cassandra for now and
then add more nodes as required.
I was wondering if it is
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Found the debian init script, you'll probably need to change the paths:
http://svn.apache.org/repos/asf/cassandra/trunk/debian/init
You can find the init script for other distros if you peel back to
'/cassandra/trunk/'.
- --
- -
Nick Summerlin
> I'm not sure why this is not allowed. As long as I do not use CL.all there
> will be enough nodes available to satisfy the read / write (at least when I
> look at ReadCallback and the WriteResponseHandler). Or am I missing
> something here?
According to http://www.datastax.com/docs/1.0/cluster_a
Thanks, already added a dedicated column family and all works fine!
*Tamar Fraenkel *
Senior Software Engineer, TOK Media
[image: Inline image 1]
ta...@tok-media.com
Tel: +972 2 6409736
Mob: +972 54 8356490
Fax: +972 2 5612956
On Thu, Mar 15, 2012 at 2:58 PM, Rustam Aliyev wrote:
>
ok . disappointing. You could have got atomicity like behavior
most of the time, if it was otherwise.
How does one execute a logical write that is spread in several CFs
(say in User CF, you have 'state' as a column and userid as rowkey.
But in State CF, you have state as rowkey and userid as a
No, it's not possible.
On 15/03/2012 10:53, Tamar Fraenkel wrote:
Watched the video, really good!
One question:
I wonder if it is possible to mix counter columns in
Cassandra 1.0.7 with regular columns in the same CF.
Hi Aaron,
On 03/15/2012 10:52 AM, aaron morton wrote:
1. a running cluster of N=3, R=3
2. upgrade R to 4
You should not be allowed to set the RF higher than the number of nodes.
I'm not sure why this is not allowed. As long as I do not use CL.all
there will be enough nodes available to satisf
Watched the video, really good!
One question:
I wonder if it is possible to mix counter columns in Cassandra 1.0.7 with
regular columns in the same CF.
Even if it is possible, I am not sure I should mix them as I use Hector,
and this means I will have to user both Hector and CQL,
Am I right?
Than
On Thursday 15 of March 2012, aaron morton wrote:
> > 1. a running cluster of N=3, R=3
> > 2. upgrade R to 4
>
> You should not be allowed to set the RF higher than the number of nodes.
I wonder why is that restriction ?
It would be easier to increase RF first (similar as having new node down),
Thanks Tyler,
I see that cassandra.yaml has "endpoint_snitch:
com.datastax.bdp.snitch.DseSimpleSnitch". Will this pick up the
configuration from the cassandra-topology.properties file as does the
PropertyFileSnitch ? Or is there some other way of telling it which nodes
are in withc DC?
Cheers,
Al
> 1. a running cluster of N=3, R=3
> 2. upgrade R to 4
You should not be allowed to set the RF higher than the number of nodes.
I'm going to assume that clients on the web server only talk to the local
cassandra. So that when you add the new cassandra node it will not have any
clients until yo
Hi,
I ran some data import tests for cassandra 0.8.1 and 1.0.7. The results
were a little bit surprising
0.8.1, SimpleStrategy, Rep_Factor=3,QUORUM Writes, RP, SimpleSnitch
XXX.XXX.XXX.A datacenter1 rack1 Up Normal 140.61 GB 12.50%
XXX.XXX.XXX.B datacenter1 rack1 Up
Check nodetool ring to see what state the nodes are in, they all need to be UP.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 15/03/2012, at 7:31 PM, Rishabh Agrawal wrote:
> Hello,
>
> I initially had two node cluster and now I joined
The simple thing to say is: If you send a batch_mutate the order which the rows
are written is undefined. So you should not make any assumptions such as if
rows C is stored, rows A and B also have.
They may do but AFAIK it is not part of the API contract.
For the thrift API batch_mutate takes
After clearing the system files I was able to successfully join the node.
thanks.
From: aaron morton [mailto:aa...@thelastpickle.com]
Sent: Thursday, March 15, 2012 2:13 PM
To: user@cassandra.apache.org
Subject: Re: Adding nodes to cluster (Cassandra 1.0.8)
There have been two similar reports
> is there any disadvantage to using supercolumns here?
There are some http://wiki.apache.org/cassandra/CassandraLimitations
I would avoid them if you can. The one thing you cannot do when using
CompositeTypes for column names is a range delete. If you delete a super
column, then you delete a
Is there anything going on in the logs ? Are nodes going up and down ? Can you
see any messages about delivering hints ?
If the query to read the hints errors it will log "HintsCF getEPPendingHints
timed out" at INFO level.
Also checking, do the hinted_handoff_* settings in cassandra.yaml ha
Hi,
I'm using cassandra (1.0.8) embedded in the same jvm as a
webapplication. All data is available on all nodes (R = N), read /
write CL.ONE.
Is it correct to assume in the following scenario that the newly added
node has all data locally and that secondary indexes are fully created
afte
Ok I'll give it a try.
Thank you Aaron
On 3/15/12 9:16 AM, aaron morton wrote:
- use the join command
normally join-ring is only used when the node is having some sort of
problem.
The best approach to bringing up a new is to explicitly set the token
and start it with auto_bootstrap=true.
h
There have been two similar reports in the last few days.
The joining node is unable to discover the cluster information it needs to find
the correct place to join. However there code appears to have checks in place
to prevent that from happening.
If you have time can you please try to reprod
>> - use the join command
normally join-ring is only used when the node is having some sort of problem.
The best approach to bringing up a new is to explicitly set the token and start
it with auto_bootstrap=true.
http://www.datastax.com/docs/1.0/operations/cluster_management#adding-capacity-to-
I added a third node to the cluster. Sure enough, this morning I come and
only one node is up, in the other two the cassandra process is not running.
In the cassandra log there is nothing, but in /var/log/syslog I see
In one node:
Mar 15 07:50:51 Cassandra3 kernel: [58566.666906] Out of memory: Ki
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