Thank you. I have a high bandwidth connection. But that also means that
regular repairs on the backup data-center will take a long time.
2013/3/14 Jabbar Azam
> Hello,
>
> If the live data centre disappears restoring the data from the backup is
> going to take ages especially if the data is goin
Hi,
Is it possible in Cassandra to make multiple column with same name ?, like
in this particular scenario I have two column with same name as "key",
first one is rowkey and second on is column name .
Thanks and Regards
Kuldeep
On Fri, Mar 15, 2013 at 4:05 PM, Kuldeep Mishra wrote:
>
> Hi ,
>
Here is a list of keywords and whether or not the words are reserved. A
reserved keyword cannot be used as an identifier unless you enclose the
word in double quotation marks. Non-reserved keywords have a specific
meaning in certain context but can be used as an identifier outside this
context.
ht
On Fri, Mar 15, 2013 at 11:43 AM, Kuldeep Mishra
wrote:
> Hi,
> Is it possible in Cassandra to make multiple column with same name ?, like
> in this particular scenario I have two column with same name as "key",
> first one is rowkey and second on is column name .
>
>
No, it shouldn't be possible
Hi Sylvain,
I created it using thrift client, here is column family creation
script,
Cassandra.Client client;
CfDef user_Def = new CfDef();
user_Def.name = "DOCTOR";
user_Def.keyspace = "KunderaExamples";
user_Def.setComparator_type("UTF8Type");
Ok. So it's a case when, CQL returns rowkey value as "key" and there is
also column present with name as "key".
Sounds like a bug?
-Vivek
On Fri, Mar 15, 2013 at 5:17 PM, Kuldeep Mishra wrote:
> Hi Sylvain,
> I created it using thrift client, here is column family creation
> script,
>
>
On Fri, Mar 15, 2013 at 3:12 AM, Rene Kochen
wrote:
> Thank you. I have a high bandwidth connection. But that also means that
> regular repairs on the backup data-center will take a long time.
Honestly, at this point I don't think anyone can provide you any good
feedback based on facts because
You can consider using a WAN optimization appliance such as a Riverbed
Steelhead to significantly speed up your transfers, though that will cost. It
is a common approach to speed up inter-datacenter transfers. Steelheads for the
AWS EC2 cloud are also available.
(Disclaimer: I used to write so
On git, I checkout out tag 1.2.2 and built it and then tar –xvf the bin distro,
but it
1. Has extra *.class files in apache-cassandra-1.2.2-SNAPSHOT/bin directory
2. Is missing the cassandra.in.sh so it would not actually start properly?
The second one took me a while to figure out. This ma
Hi Aaron,
We have many deployments, but typically:
- Live cluster of six nodes, replication factor = 3.
- A node processes more reads than writes (approximately 100 get_slices
per/second, narrow rows).
- Data per node is about 50 to 100 GBytes.
- We should recover within 4 hours.
The idea is to
I suspect you are doing something wrong because both the released archive
(I just checked) and the tag (as shown here:
https://github.com/apache/cassandra/blob/cassandra-1.2.2/bin/cassandra.in.sh)
have the cassandra.in.sh file.
--
Sylvain
On Fri, Mar 15, 2013 at 6:11 PM, Hiller, Dean wrote:
>
Very weird. I went back and tried to reproduce it after cleaning all changes
from git. I am not sure how that got deleted nor how I ended up with wordcount
*.class files since I am not doing any map/reduce or anything…..oh well, must
have made a mistake somewhere.
Thanks,
Dean
From: Sylvain
I removed Priam and get the same picture.
What I do is- I added to cassandra-env.sh two lines and start cassandra.
JVM_OPTS="$JVM_OPTS
-Dcassandra.initial_token=aaba"
JVM_OPTS="$JVM_OPTS
-Dcassandra.replace_token=aaba"
Then I can successfu
JMX ended up just with lots more IOErrors. Did a rolling restart of the cluster
and removed the HH family in the mean time. That seemed to do the trick. Thanks!
/Janne
On Mar 14, 2013, at 06:58 , aaron morton wrote:
>> What is the sanctioned way of removing hints? rm -f HintsColumnFamily*?
>
We have a CF with an indexed column 'type', but we get incomplete results when
we query that CF for all rows matching 'type'. We can find the missing rows if
we query by key.
* we are seeing this on a small, single node, 1.2.2 instance with few rows.
* we use thrift execute_cql_query, no CL i
We need to provide search capability based on a field that is a bitmap
combination of 18 possible values. We want to use secondary indexes to
improve performance. One possible solution is to create a named column for
each value and have a secondary index for each of the 18 columns.
Questions we hav
This could be either of the following bugs (which might be the same thing). I
get it too every time I recycle a node on 1.1.10.
https://issues.apache.org/jira/browse/CASSANDRA-4973
or
https://issues.apache.org/jira/browse/CASSANDRA-4785
/Janne
On Mar 15, 2013, at 23:24 , Brett Tinling wrote:
I have a Cassandra node that is going down frequently with
'java.lang.OutOfMemoryError: unable to create new native thread". Its a 16GB VM
out of which 4GB is set as Xmx and there are no other process running on the
VM. I have about 300 clients connecting to this node on an average. I have no
Hey Guys,
I remember reading somewhere that C* compression is not very effective when
most of the CFs are in wide-row format and some folks turn the compression off
and use disk level compression as a workaround. Considering that wide rows with
composites are "first class citizens" in CQL3, is
I've got a couple of questions related issues I'm encountering using
Cassandra under a heavy write load:
1. With a ConsistencyLevel of quorum, does
FBUtilities.waitForFutures() wait for read repair to complete before
returning?
2. When read repair applies a mutation, it needs to obtain a lock for
On Fri, Mar 15, 2013 at 10:35 AM, Rene Kochen
wrote:
> Hi Aaron,
>
> We have many deployments, but typically:
>
> - Live cluster of six nodes, replication factor = 3.
> - A node processes more reads than writes (approximately 100 get_slices
> per/second, narrow rows).
> - Data per node is about 50
I think I figured out where the issue is. I will keep you posted soon.
From: as...@outlook.com
To: user@cassandra.apache.org
Subject: java.lang.OutOfMemoryError: unable to create new native thread
Date: Fri, 15 Mar 2013 17:54:25 -0500
I have a Cassandra node that is going down frequently with
More info.
I see this problem only if rest of cluster runs 1.1.5 and I try to replace
dead node by version 1.1.7 or higher. If I upgrade rest of cluster to the
same version (I tried 1.1.10) everything is ok. I guess there is some
incompatibility between 1.1.5 and 1.1.7 and higher.
Thank you,
And
Hi,
I have upgraded our test cluster from 1.1.6 to 1.1.10. Followed by running
repairs. It appears that the repair task that I executed after upgrade,
brought back lots of deleted rows into life. Here are some logistics:
- The upgraded cluster started from 1.1.1 -> 1.1.2 -> 1.1.5 -> 1.1.6
- Old c
I tried to add new node to ring, it is supposed to be fast in 1.2(256
tokens on each node), but it is 8+ hours now. after showing bootstraping,
now cpu usage is very low, I turned on debug, it shows applying mutation.
is that normal?
INFO [main] 2013-03-15 08:36:44,530 StorageService.java (line
Thank you very much Aaron. I recall from the logs of this upgraded node to
1.2.2 reported seeing others as dead. Brandon suggested in
https://issues.apache.org/jira/browse/CASSANDRA-5332 that I should at least
upgrade from 1.1.7. So, I decided to try upgrading to 1.1.10 first before
upgrading to 1.
Any suggestions?
-Vivek
On Fri, Mar 15, 2013 at 5:20 PM, Vivek Mishra wrote:
> Ok. So it's a case when, CQL returns rowkey value as "key" and there is
> also column present with name as "key".
>
> Sounds like a bug?
>
> -Vivek
>
>
> On Fri, Mar 15, 2013 at 5:17 PM, Kuldeep Mishra
> wrote:
>
>>
Thanks Aaron.
I am using CL=ONE. read_repair_chance=0. The part which I'm wondering
about is what happens to the internal Cassandra writes if Hinted
Handoffs are disabled. I think I understand what it means for
application-level data, but the part I'm not entirely sure about is
what it could mean
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