There is no facility to do a get_range in reverse.
Rows are ordered by their token, and using the Random or Murmur3 partitioner
this means they are randomly ordered. So there is not much need to go
backwards, or get 10 rows from either side of a particular row.
Can you change your data model
The spec for the protocol is here
https://git-wip-us.apache.org/repos/asf?p=cassandra.git;a=blob_plain;f=doc/native_protocol.spec;hb=refs/heads/cassandra-1.2
Cheers
-
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 1/02/2013,
You are likely hitting the point where compaction is running all the time
and consuming all the weak cloud io. Ebs is not suggested for performance
you should use the ephermal drives.
On Friday, February 1, 2013, Marcelo Elias Del Valle wrote:
> Hello,
>
> I am trying to figure out why the f
That is must be it.
Yes. it happens to be the seed. I should have tried "rebuild". Instead I did
repair and now I am sitting here waiting for the compaction to finish...
Thanks.
-Wei
From: Derek Williams
To: user@cassandra.apache.org; Wei Zhu
Sent: Friday, F
Please include the information on how your keyspace was created. This
may indicate you set the replication factor to 3, when you only have 1
node, or some similar condition.
On Fri, Feb 1, 2013 at 4:57 PM, wrote:
> I need to offer my profound thanks to this community which has been so
> helpful
I need to offer my profound thanks to this community which has been so helpful
in trying to figure this system out.
I've setup a simple ring with two nodes and I'm trying to insert data to them.
I get failures 100% with this error:
me.prettyprint.hector.api.exceptions.HUnavailableException: :
Did the node list itself as a seed node in cassandra.yaml? Unless something
has changed, a node that considers itself a seed will not auto bootstrap.
Although I haven't tried it, I think running 'nodetool rebuild' will cause
it to stream in the data it needs without doing a repair.
On Wed, Jan 30
You do not just want to vnodes without being sure. Some queries are
not optimized for vnodes and issue 128 slices to solve some
secondaryIndexQueries.
On Fri, Feb 1, 2013 at 12:55 PM, Víctor Hugo Oliveira Molinar
wrote:
> Do not set initial_token when using murmur3partitioner.
> instead, set num
Hi All,
On each row I have a column which maintains the timestamp like
"lastUpdated" etc.
While inserting such row I want to make sure that the row should be only
updated if the lastUpdated is older than the new one I am inserting.
One way to do this is -
Read the record first check the timesta
Aaron,
Ticket is at
http://code.google.com/a/apache-extras.org/p/cassandra-jdbc/issues/detail?id=61
Andy
On 1 Feb 2013, at 18:01, aaron morton wrote:
> I think
> http://code.google.com/a/apache-extras.org/p/cassandra-jdbc/issues/list is
> the place to raise the issue.
>
> Can you update
I think http://code.google.com/a/apache-extras.org/p/cassandra-jdbc/issues/list
is the place to raise the issue.
Can you update the mail thread with the ticket as well?
Thanks
-
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
O
> Are there tickets/documents explain how data be replicated on Virtual Nodes?
This http://www.datastax.com/dev/blog/virtual-nodes-in-cassandra-1-2
Check the changes.txt file, they link to tickets.
not many people use BOP so you may be exploring new'ish territory. Try asking
someone on the IRC
Do not set initial_token when using murmur3partitioner.
instead, set num_tokens.
For example, u have 3 hosts with the same hardware setup, then, for each
one set the same num_tokens.
But now consider adding another better host, this time i'd suggest you to
set previous num_tokens * 2.
num_tokens:
> 5. the problematic Data file contains only 5 to 10 keys data but large(2.4G)
So very large rows ?
What does nodetool cfstats or cfhistograms say about the row sizes ?
> 1. what is happening?
I think this is partially large rows and partially the query pattern, this is
only by roughly correc
> Will that cause the symptom of no data streamed from other nodes? Other
> nodes still think the node had all the data?
AFAIk they will not make assumptions like that.
> Can I just change it in yaml and restart C* and it will correct itself?
It's a schema config change, check the help for the
Many of my mental models bother people :)
This particular one came from my understanding of Big Table and the code.
For me this works, I think of (internal) rows as roughly "containing" the CF's.
In the CQL world it works for me as well, the partition key (first part of the
primary key) is im
Can you update the ticket with your experiences ?
https://issues.apache.org/jira/browse/CASSANDRA-5152
Cheers
-
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 31/01/2013, at 11:13 AM, yen-fen_...@mcafee.com wrote:
> I had th
For Data Stax Enterprise specific questions try the support forums
http://www.datastax.com/support-forums/
Cheers
-
Aaron Morton
Freelance Cassandra Developer
New Zealand
@aaronmorton
http://www.thelastpickle.com
On 31/01/2013, at 8:27 AM, S C wrote:
> I am using DseDelegateS
Whats the full error stack on the client ?
Are you using a pre-build thrift client or you own ? If the later try using a
pre built client first, like Hector or pycassa. If it works there look into how
that code works and go from there.
Cheers
-
Aaron Morton
Freelance Cassandr
Hi again,
Once started playing with CCM it's hard to stop, such a great tool.
My issue with secondary indexes is following: neither explicit
'nodetool repair' nor implicit 'hinted handoffs/read repairs' resolve
inconsistencies in data I get from secondary indexes.
I observe this for both one- and
> What is the cardinality like on these indexes? Can you provide the
> schema creation for these two column families?
This is the schema of the CFs:
create column family CF_users
with comparator = UTF8Type
and column_metadata =
[
See https://issues.apache.org/jira/browse/CASSANDRA-5168 - should be fixed in
1.1.10 and 1.2.2.
On Jan 30, 2013, at 9:18 AM, Tejas Patil wrote:
> While reading data from Cassandra in map-reduce, I am getting
> "InvalidRequestException(why:Start token sorts after end token)"
>
> Below is the c
Hello,
I've found a combination that doesn't work:
A column family that have a secondary index and caching='ALL' with
data in two datacenters and I do a restart of the nodes, then my
secondary index queries start returning 0 rows.
It happens when amount of data goes over a certain threshold, so I
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