Thanks Ivo.
We are quite close to releasing so we'd hope to understand what causing the
error and may try to avoid it where possible. As said, it seems to work ok the
first time round.
The problem you referring in the last mail, was it restricted to bulk loading
or otherwise?
Thanks
-A
Iv
To be clear, this happened on a 1.1.2 node and it happened again *after* you
had run a scrub ?
Has this cluster been around for a while or was the data created with 1.1 ?
Can you confirm that all sstables were re-written for the CF? Check the
timestamp on the files. Also also files should have
Index files map keys (not tokens) to offsets in the data file.
A range scan uses the index file to seek to the start position in the data file
and then does a partial scan of the data file.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 9
> Would you guys consider adding this option to a future release?
All improvements are considered :) Please create a ticket on
https://issues.apache.org/jira/browse/CASSANDRA and reference CASSANDRA-3073
> If you want I can try to create a patch myself and submit it to you?
Sounds like a plan.
Th
Ah, it's a Hector query question.
You may have bette luck on the Hector email list. Or if you can turn on debug
logging on the server and grab the query that would be handy.
The first thing that stands out is that (in cassandra) comparison operations
are not used in a slice range.
Cheers
On Fri, Jul 6, 2012 at 10:49 PM, Leonid Ilyevsky
wrote:
> At this point I am really confused about what direction Cassandra is going.
> CQL 3 has the benefit of composite keys, but no dynamic columns.
> I thought, the whole point of Cassandra was to provide dynamic tables.
CQL3 absolutely provid
I would check if you don't have a version of antlr install on you
system that takes
precedence over the one distributed with C* and happens to not be compatible.
Because I don't remember there having been much change to the Cli between 1.1.1
and 1.1.2 and the grammar nobody has had that problem so
Does anyone know something about the following questions?
1. Does Cassandra support customized filter? customized filter means
programmer can define his desired filter to select the data.
2. Does Cassandra support trigger? trigger has the same meaning as in
RDBMS.
Thanks in advance.
Regards,
Fel
Thanks Sylvain, this is useful.
So I guess, in the batch_mutate call, in the map that I pass to it, only the
first element of the composite key should be used as a key (because it is the
real key), and the other parts of the key should be passed as regular columns?
Is this correct? While I am wa
I think he means something like having a fixed set of coiumns in the table
definition, then in the actual rows having other columns not specified in
the defintion, indepentent of the composited part of the PK. When I
reviewed CQL3 for using in Gossie[1] I realized I couldn't have this, and
that it
On Tue, Jul 10, 2012 at 4:19 PM, Carlos Carrasco <
carlos.carra...@groupalia.com> wrote:
> I think he means something like having a fixed set of coiumns in the table
> definition, then in the actual rows having other columns not specified in
> the defintion, indepentent of the composited part of t
On Tue, Jul 10, 2012 at 4:17 PM, Leonid Ilyevsky
wrote:
> So I guess, in the batch_mutate call, in the map that I pass to it, only the
> first element of the composite key should be used as a key (because it is the
> real key), and the other parts of the key should be passed as regular
> column
I am confused then. I remember reviewing the source for CQL3 and finding
that the row reader used the column count in the CF definition in order to
find how many columns it needed to read a single row. I guess I missed a
filter over the composited part or that I reviewed an old version.
On 10 July
While Jonathan and crew work on the infrastructure to support triggers:
https://issues.apache.org/jira/browse/CASSANDRA-4285
We have a project going over here that provides a trigger-like capability:
https://github.com/hmsonline/cassandra-triggers/
https://github.com/hmsonline/cassandra-triggers/w
Hello Aaron,
Thank you for responding. Since the time of my original email, we noticed that
in the process of performing this upgrade that data was lost. We have restored
from backup and are now trying this again with two changes:
1) We will be using 1.1.2 throughout the cluster
2) We have sw
I see. I actually tried it, and it consistently throws an exception. Below is
my test code. I have two tests; test1 is for the composite key case, and test2
is for the simple key. The test2 works fine, while test1 gives me:
Exception in thread "main" InvalidRequestException(why:Not enough bytes
We're finding that reading deleted columns can be very slow and I'm
trying to get confirmation for our analysis of what happens. We wrote
lots of data eons ago into fairly large rows (up to 1MB). We recently
read those rows and then deleted them. After this, we ran a
verification-type pass that att
I think in this case that's just Hector's way of setting the EOC byte for a
component. My guess is that the composite isn't being structured correctly
through Hector, as well.
On Tue, Jul 10, 2012 at 4:40 AM, aaron morton wrote:
>
> The first thing that stands out is that (in cassandra) comparis
This is expected due to tombstones, which this explains pretty well:
http://wiki.apache.org/cassandra/DistributedDeletes
If you don't have any tombstones for the row, the bloom filter will let
Cassandra avoid doing any disk reads at all 99% of the time.
On Tue, Jul 10, 2012 at 10:50 AM, Thorsten
Hi,
I have an application that consists of multiple (possible 1000's) of
measurement series, and each measurement series generates a small amount of
data output (only about 500 bytes) every 10 seconds. This time series of
data should be stored in Cassandra in a fashion that both read access is
pos
On Tue, Jul 10, 2012 at 12:14 PM, Roland Hänel wrote:
> Hi,
>
> I have an application that consists of multiple (possible 1000's) of
> measurement series, and each measurement series generates a small amount of
> data output (only about 500 bytes) every 10 seconds. This time series of
> data shou
Hi
I want to take out 2 nodes from a 8 node cluster and use in another
cluster, but can't afford the overhead of streaming the data and
rebalance cluster. Since replication factor is 2 in first cluster, I
won't lose any data.
I'm planning to save my commit_log and data directories and
bootstrappi
I see now there is a package org.apache.cassandra.cql3.statements, with
BatchStatement class. Is this what I should use?
-Original Message-
From: Leonid Ilyevsky [mailto:lilyev...@mooncapital.com]
Sent: Tuesday, July 10, 2012 11:45 AM
To: user@cassandra.apache.org
Subject: RE: Dynamic CF
I have tested this extensively and EOC has huge issue in terms of
usability of CompositeTypes in Cassandra.
As an example: If you have 2 Composite Columns such as A:B:C and A:D:C.
And if you do search on A:B as start and end Composite Components, it
will return D as well. Because it returns all t
On Tue, Jul 10, 2012 at 2:20 PM, Sunit Randhawa wrote:
> I have tested this extensively and EOC has huge issue in terms of
> usability of CompositeTypes in Cassandra.
>
> As an example: If you have 2 Composite Columns such as A:B:C and A:D:C.
>
> And if you do search on A:B as start and end Compos
I am trying to use the org.apache.cassandra.cql3 package. Having problem
connecting to the server using ClientState.
I was not sure what to put in the credentials map (I did not set any
users/passwords on my server), so I tried setting empty strings for "username"
and "password", setting them to
after reading the JIRA, I decided to use Java 6.
with Casandra 1.1.2 on Java 6 x64 on Win7 sp1 x64 (all latest versions),
after a several minutes of sustained writes, I see:
from system.log:
java.io.IOError: java.io.IOException: Failed to delete
C:\var\lib\cassandra\commitlog\CommitLog-94869
oops; I missed log line:
ERROR [COMMIT-LOG-ALLOCATOR] 2012-07-10 14:19:39,776
AbstractCassandraDaemon.java (line 134) Exception in thread
Thread[COMMIT-LOG-ALLOCATOR,5,main]
java.io.IOError: java.io.IOException: Failed to delete
C:\var\lib\cassandra\commitlog\CommitLog-948695923996466.log
at
On Tue, Jul 10, 2012 at 3:04 PM, Leonid Ilyevsky
wrote:
> I am trying to use the org.apache.cassandra.cql3 package. Having problem
> connecting to the server using ClientState.
>
> I was not sure what to put in the credentials map (I did not set any
> users/passwords on my server), so I tried
A problem of many keyspaces is clients are bound to a keyspace so
connection pooling multiple keyspaces is an issue. Cql has support for some
limited cross keyspace operations.
On Sunday, July 8, 2012, aaron morton wrote:
> I would do a test to see the latency difference under load between having
Hi
I encounter the High CPU problem, Cassandra 1.0.3, happened on both
sized and leveled compaction, 6G heap, 64bit Oracle java. For normal
traffic, Cassandra will use 15% CPU.
But every half a hour, Cassandra will use almost 100% total cpu (SUSE,
12 Core).
And here is the top inform
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