On Tue, Nov 15, 2011 at 12:13 AM, Ramesh Natarajan wrote:
> Hi,
>
> We are running a 8 node cassandra cluster running the latest 1.0.2
> release. We are seeing this error showing up in the system.log file.
> Any idea if this is a known issue in cassandra 1.0.2?
It is not. Can you please open a
Done...good idea! ;)
On Mon, Nov 14, 2011 at 7:54 PM, Jake Luciani wrote:
> Hi,
>
> Sorry for the intrusion.
>
> I was speaking to some of the LinkedIn engineers at ApacheCon last week
> about to see how to get
> Cassandra into the linkedin skills page [1].
>
> They claim if more people add Cass
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 cassa
Hi Ernie,
The nodes are not part of the ring so I don't think remove token will help.
They're just marked as unreachable only when I call describe cluster. When
I do nodetool ring the nodes don't show up there.
-Giannis
On Mon, Nov 14, 2011 at 10:55 PM, ehers...@gmail.com wrote:
> Giannis,
>
>
Hi Mike,
I'll try and write a blog post soon about it and share some information.
-Giannis
On Tue, Nov 15, 2011 at 7:49 AM, Giannis Neokleous <
gian...@generalsentiment.com> wrote:
> Hi Ernie,
>
> The nodes are not part of the ring so I don't think remove token will
> help. They're just marked
To clarify, I wish to keep N=4 and W=2 in the following scenario.
Thanks.
On Sun, Nov 13, 2011 at 11:20 PM, A J wrote:
> Hello
> Say I have 4 nodes: A, B, C and D and wish to have consistency level
> for writes defined in such as way that writes meet the following
> consistency level:
> (A or B)
Thanks for your reply.
We did a rolling upgrade; one by one, took the node offline, set up the
configuration in the new distribution package and fired it up.
I got that error after I tried to enable row cache, in hope of improving
performance. Tried to update one of the CFs from the cli, but it jus
Hi
I need to add 'search users' functionality to my application. (The trigger
for fetching searched items(like google instant search) is made when 3
letters have been typed in).
For this, I make a CF with String type keys. Each such key is made of first
3 letters of a user's name.
Thus all names
Thanks, Giannis. Looking forward to ...
Mike
From: Giannis Neokleous [mailto:gian...@generalsentiment.com]
Sent: Tuesday, November 15, 2011 7:01 AM
To: ehers...@gmail.com
Cc: user@cassandra.apache.org
Subject: Re: BulkLoader
Hi Mike,
I'll try and write a blog post soon about it and share some
Last night one of my nodes died inexplicably, with no log entries anywhere
indicating the reason (cassandras log, /var/log/messages, etc). I tried to
restart it but the node will not restart as it fails with the errors below
when replaying the commit log. I should point out that the cluster is
curr
After removing the offending commit log, the node was able to restart
successfully. Sufficed to say that's not something I really wanted to do.
Dan
From: Dan Hendry [mailto:dan.hendry.j...@gmail.com]
Sent: November-15-11 10:44
To: 'user@cassandra.apache.org'
Subject: 0.8.6 - Cannot Restart
Hello
VoltDB has an export feature to stream the data out of the database.
http://voltdb.com/company/blog/voltdb-export-connecting-voltdb-other-systems
This is different from Cassandra's export feature
(http://wiki.apache.org/cassandra/Operations#Import_.2BAC8_export)
which is more of a different
Aditya Narayan wrote:
>Hi
>
>I need to add 'search users' functionality to my application. (The trigger
>for fetching searched items(like google instant search) is made when 3
>letters have been typed in).
>
>For this, I make a CF with String type keys. Each such key is made of first
>3 letters
mike...@thomsonreuters.com wrote:
>Thanks, Giannis. Looking forward to ...
>
>Mike
>
>From: Giannis Neokleous [mailto:gian...@generalsentiment.com]
>Sent: Tuesday, November 15, 2011 7:01 AM
>To: ehers...@gmail.com
>Cc: user@cassandra.apache.org
>Subject: Re: BulkLoader
>
>Hi Mike,
>
>I'll try a
Silviu Matei wrote:
>Thanks for your reply.
>We did a rolling upgrade; one by one, took the node offline, set up the
>configuration in the new distribution package and fired it up.
>I got that error after I tried to enable row cache, in hope of improving
>performance. Tried to update one of the
I really don't recommend using t1.micros. The problem with them is that they
have CPU bursting, basically meaning you get lots of CPU resources for a
short time but if you use more than you have been allocated you get
basically nothing for 10+ seconds afterwards. By 'basically nothing' I
really mea
Dan Hendry wrote:
>After removing the offending commit log, the node was able to restart
>successfully. Sufficed to say that's not something I really wanted to do.
>
>
>
>Dan
>
>
>
>From: Dan Hendry [mailto:dan.hendry.j...@gmail.com]
>Sent: November-15-11 10:44
>To: 'user@cassandra.apache.or
A J wrote:
>To clarify, I wish to keep N=4 and W=2 in the following scenario.
>
>Thanks.
>
>On Sun, Nov 13, 2011 at 11:20 PM, A J wrote:
>> Hello
>> Say I have 4 nodes: A, B, C and D and wish to have consistency level
>> for writes defined in such as way that writes meet the following
>> consi
The thing that I thought if initially would be setting up your cluster in a
multi-datacenter config[1]. In that scenario you could add an additional
machine in a second datacenter with RF=1. We are using a variant of this setup
to separate long running calculations from our interactive systems.
The issue with that is that I wish to have EACH_QUORUM in our other 2
datacenters but not in the third DC.
Could not figure a way to accomplish that so exploring have a
near-realtime backup copy in the third DC via some streaming process.
On Tue, Nov 15, 2011 at 12:12 PM, Robert Jackson
wrote:
>
Hi,
Did anyone try to configure Async Logging in Cassandra 0.8.4 ? It seems
only way to configure logging is through property file
log4j-embedded-cassandra.properties which doesnt support Async logging.
- Sachin
It would work if you could use LOCAL_QUORUM in each independent data center,
but with EACH_QUORUM the whole read/write operation would block until a quorum
was reached in each data center. This would be particularly bad if using a
single replica in the "backup" data center and it was unavailable
Right, it only supports the properties file atm.
We're open to extending this to the xml configurator but is this
really a problem? At INFO cassandra doesn't log much, and at DEBUG
you're going to suffer async or no. :)
On Tue, Nov 15, 2011 at 12:32 PM, Sachin Bhansali
wrote:
> Hi,
>
> Did anyo
Thanks Jonathan, Actually we where concerned about writing logs on to NFS.
- Sachin
On Tue, Nov 15, 2011 at 2:39 PM, Jonathan Ellis wrote:
> Right, it only supports the properties file atm.
>
> We're open to extending this to the xml configurator but is this
> really a problem? At INFO cassand
Any insights on this ?
On Tue, Nov 15, 2011 at 9:40 PM, Quintero wrote:
>
>
> Aditya Narayan wrote:
>
> >Hi
> >
> >I need to add 'search users' functionality to my application. (The trigger
> >for fetching searched items(like google instant search) is made when 3
> >letters have been typed in).
I've got a following problem to CASSANDRA-3492, also related to
ridiculously high memory.
After the fix yesterday for CASSANDRA-3492 I have that node in question
up and running.
But another node (on the same machine but different cluster), even after
an upgrade to the staging 1.0.3 and a `nodet
Hello,
I'm trying to understand the network usage I am seeing in my cluster, can
anyone shed some light?
It's an RF=3, 12-node, cassandra 0.8.6 cluster. The nodes are
p13,p14,p15...p24 and are consecutive in that order on the ring.
Each node is only a cassandra database. I am hitting the cluster fr
Sorry about the previous message, I've enabled keyboard shortcuts on
gmail...*sigh*...
Hello,
I'm trying to understand the network usage I am seeing in my cluster, can
anyone shed some light?
It's an RF=3, 12-node, cassandra 0.8.6 cluster. repair is performed on each
node once a week, with a rolli
Hi Aditya
Not sure the best way to do in Cassandra but have you considered using
apache solr - you could then include just the row keys pointing back
to Cassandra where the actual data is.
Solr seems quite capable of performing google like searches and is fast.
Cheers
Ben
On 16/11/2011, at 1:
Re: https://issues.apache.org/jira/browse/CASSANDRA-2863
All,
I encountered this NPE during a node move. Everything seemed to complete
(no streaming, no further compactions, no further errors in system.log)
however the move command never returned. After several hours I then
cancelled that comman
Thank you Konstantin,Radim. Appreciate your responses.
On Mon, Nov 14, 2011 at 11:27 PM, Radim Kolar wrote:
>
> It may be the case that your CL is the issue. You are writing it at
>> ONE, which means that out of the 4 replicas of that key (two in each
>> data center), you are only putting it on
Hi Ben,
Solr, as I understood is for implementing full text
search capability within documents, but in my case, as of now I just need
to implement search on user names which seems to be easily provided
by Cassandra as user names (as column names) may be sorted alphabetically
within rows. I am spli
> > I need to add 'search users' functionality to my application. (The
>> trigger for fetching searched items(like google instant search) is made
>> when 3 letters have been typed in).
>> >
>> > For this, I make a CF with String type keys. Each such key is made of
>> first 3 letters of a user's na
Got the first option that you suggested.
However, In the second one, are you suggested to use, for e.g, key='Marcos'
& store cols, for all users of that name, containing userId inside that
row. That way it would have to read multiple rows while user is doing a
single search.
On Wed, Nov 16, 2011
Regarding the first option that you suggested through composite columns,
can I store the username & id both in the column name and keep the column
valueless?
Will I be able to retrieve both the username and id from the composite col
name ?
Thanks a lot
On Wed, Nov 16, 2011 at 10:56 AM, Aditya Nar
I think you can but I am not sure, I haven't tried that yet, Nothing harm
in keeping value also it will be read in single query only.
In 2nd case, yes 2 or more query required to get specific user details. As
username is map to user_id's key(unique like UUID) and user_id key store
actual details.
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