Issues running Bulkloader program on AIX server

Hi All, I am facing issues with running java Bulkloader program from a AIX server. The program is working fine on Linux server. I am receiving the below error on AIX. Can anyone help me in getting this working? java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAcces

Apache Cassandra for Developers-Starter

Hi, Just wanted to share that recently i worked with Packt publishing to author a quick Cassandra reference in form of a book. Here it is: http://www.packtpub.com/apache-cassandra-for-developers/book Sincerely, -Vivek

Re: Any plans for read-before-write update operations in CQL3?

I guess it'd be safe to say that the read consistency could be the same as the consistency of the update. But regardless, that would be a lot better than reading a value, modifying it at the client side and then writing it back. On Apr 3, 2013, at 7:12 PM, Edward Capriolo wrote: > Counters ar

Re: Why do Datastax docs recommend Java 6?

Hey guys. what gives! Apparently Cassandra ran on 1.7 like 5 years ago. Was their a regression? jk https://github.com/jbellis/helenus Installation * Please use jdk 1.7; Cassandra will run with 1.6 but frequently core dumps on quad-core machines * Unpack the tar ball: On Wed, F

Re: Any plans for read-before-write update operations in CQL3?

Counters are currently read before write, some collection operations on List are read before write. On Wed, Apr 3, 2013 at 9:59 PM, aaron morton wrote: > I would guess not. > > I know this goes against keeping updates idempotent, > > There are also issues with consistency. i.e. is the read local

Re: Blob vs. "normal" columns (internals) difference?

> What is the downside, anyway? you code is now the only thing that can read the data. So it makes it harder to look at in a CLI tool. IMHO just store the data in columns. Cheers - Aaron Morton Freelance Cassandra Consultant New Zealand @aaronmorton http://www.thelastpickle.

Re: Any plans for read-before-write update operations in CQL3?

I would guess not. > I know this goes against keeping updates idempotent, There are also issues with consistency. i.e. is the read local or does it happen at the CL level ? And it makes things go slower. > We currently do things like this in client code, but it would be great to be > able t

Re: upgrading 1.1.x to 1.2.x via sstableloader

> java.lang.UnsupportedOperationException: SSTable zzz/xxx/yyy-hf-47-Data.db is > not compatible with current version ib You cannot stream files that have a different on disk format. 1.2 can read the old files, but cannot accept them as streams. You can copy the files to the new machines and us

Re: Alter table drop column seems not working

I dont think it's supported http://www.datastax.com/docs/1.2/cql_cli/cql/ALTER_TABLE#dropping-typed-col Anyone else know? Cheers - Aaron Morton Freelance Cassandra Consultant New Zealand @aaronmorton http://www.thelastpickle.com On 3/04/2013, at 8:11 PM, julien Campan wrote:

Re: Repair does not fix inconsistency

What version are you on ? Can you run a repair on the CF and check: Does the repair detect differences in the CF and stream changes ? After the streaming does it run a secondary index rebuild on the new sstable ? (Should be in the logs) Can you provide the full query trace ? Cheers ---

Re: Blob vs. "normal" columns (internals) difference?

On Thu, Apr 4, 2013 at 6:58 AM, aaron morton wrote: > > 1. Is size getting bigger in either one in storing one Tweet? > If you store the data in one blob then we only store one column name and > the blob. If they are in different cols then we store the column names and > their values. > > > 2. Has

Re: Blob vs. "normal" columns (internals) difference?

> 1. Is size getting bigger in either one in storing one Tweet? If you store the data in one blob then we only store one column name and the blob. If they are in different cols then we store the column names and their values. > 2. Has either choice have impact on read/write performance on large

Re: Cassandra 1.0.10 to 1.2.3 upgrade "post-mortem"

> I just wanted to share our experience of upgrading 1.0.10 to 1.2.3 In general it's dangerous to skip a major release when upgrading. > ERROR [MutationStage:33] 2013-03-31 09:00:02,899 CassandraDaemon.java (line > 164) Exception in thread Thread[MutationStage:33,5,main] > java.lang.AssertionErr

Data Model and Query

Hi, Whats the recommendation on querying a data model like StartDate > “X” and counter > “Y” . Its kind of range queries across multiple columns and key. I have the flexibility for modelling the data for the above query accordingly. Regards, Shubham

Re: IndexOutOfBoundsException during repair, streaming

> We deleted and recreated those CFs before moving into > production mode. We have a wiener. The comparator is applying the current schema to the byte value read from disk (schema on read) which describes a value with more than 2 components. It's then trying to apply the current schema so it c

Re: creation of yaml-configuration from existing Config-object fails

Compare the yaml file you created with the default one, something is different. Cheers - Aaron Morton Freelance Cassandra Consultant New Zealand @aaronmorton http://www.thelastpickle.com On 3/04/2013, at 12:17 AM, Heinrich Götzger wrote: > Hello, > > I try to read, edit, wri

Re: how to stop out of control compactions?

> And it appears I can't set min > 32 Why did you want to set it so high ? If you want to disable compaction set it to 0. Cheers - Aaron Morton Freelance Cassandra Consultant New Zealand @aaronmorton http://www.thelastpickle.com On 2/04/2013, at 8:43 PM, William Oberman wrote

Re: CorruptSSTableException in system keyspace

There is a ticket there from an older version but I doubt thats it https://issues.apache.org/jira/browse/CASSANDRA-4837 You may be hitting an edge case by quickly creating 200 to 300 CF's. Can you reproduce the problem outside of your test infrastructure ? If so can you raise a ticket https://i

Re: how to test our transfer speeds

JBOD as talked about here http://www.datastax.com/wp-content/uploads/2012/08/C2012-StateofCassandra-JonathanEllis.pdf and defined by disk_failure_policy So that when you have very large nodes disk failed does not require a full replacement. But if you are using a high level raid guess that's no

Re: Unable to prefix in astyanax read query

>> I have created this column family using CQL and defined the primary key >> as What was the create table statement ? >> BadRequestException: [host=localhost(127.0.0.1):9160, latency=6(6), >> attempts=1]InvalidRequestException(why:Not enough bytes to read value of >> component 0) Unless the CQL

Re: unsubscribe

To remove your address from the list, send a message to: mailto:user-unsubscr...@cassandra.apache.org)> Kind regards,
 Radek Gruchalski radek.gruchal...@technicolor.com (mailto:radek.gruchal...@technicolor.com) | radek.gruchal...@portico.io (mailto:radek.gruchal...@portico.io) | 
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Any plans for read-before-write update operations in CQL3?

Hi Guys, Are there any short/long term plans to support UPDATE operations that require read-before-write, such as increment on a numeric non-counter column? i.e. UPDATE CF SET NON_COUNTER_NUMERIC_COLUMN = NON_COUNTER_NUMERIC_COLUMN + 1; UPDATE CF SET STRING_COLUMN = STRING_COLUMN + "postfix";

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how are reads done on compressed sstables?

I was reading this great article on sstables http://www.igvita.com/2012/02/06/sstable-and-log-structured-storage-leveldb/ And the only thing it is not touching upon is how it is doing lookups when compression is enabled. Is cassandra using the snappy framing concept so it can random access int

upgrading 1.1.x to 1.2.x via sstableloader

Does anyone knows what is the best process to put data from cassandra 1.1.x (1.1.7 to be more precise) to cassandra 1.2.3 ? I am trying to use sstableloader and stream data to a new cluster but I get. ERROR [Thread-125] 2013-04-03 16:37:27,330 IncomingTcpConnection.java (line 183) Received stream

Re: Linear scalability problems

If I had to guess, I would say that your client is the bottleneck, not the cluster. Are you inserting data with multiple threads or processes? On Wed, Apr 3, 2013 at 8:49 AM, Anand Somani wrote: > Hi, > > I am running some tests trying to scale out our application from using a 3 > node cluster

Alter table drop column seems not working

Hi, I'm working with cassandra 1.2.2. When I try to drop a column , it's not working. This is what I tried : CREATE TABLE cust ( ise text PRIMARY KEY, id_avatar_1 uuid, id_avatar_2 uuid, id_avatar_3 uuid, id_avatar_4 uuid ) ; cqlsh> ALTER TABLE cust DROP id_avatar_1 ; ==>Bad Reques

Linear scalability problems

Hi, I am running some tests trying to scale out our application from using a 3 node cluster to 6 node cluster. The thing I observed is that when using a 3 node cluster I was able to handle abt 41 req/second, so I added 3 more nodes thinking it should close to double, but instead it only goes upto

Re: Problem with streaming data from Hadoop: DecoratedKey(-1, )

Strange things happen. It wasn't a single row, but one single "part" file of the Hadoop's input that failed - we didn't manage to find a specific row that causes the problem. However, it keeps failing only on production, where we can't experiment with it a lot. We tried to reproduce it in a fe

Repair does not fix inconsistency

Hi, TL;DR: I have inconsistend data (1 live row on node A & 1 tombstoned row on node B) that do not get fixed by repair. What can be a problem? Long version: I have a CF containing Users' info, which I sometimes query by key, and sometimes by indexed columns like email. I'm using RF=2. I wri

Re: Cassandra freezes

It seems this problem is back and I am unsure how to solve it. I have a test setup like this: 4 machines run 8 processess each. Each process has 2 threads, 1 for writing 100 000 rows and one for reading another 100 000 rows. Each machine (and process) read and write the exact same rows so it is ess

Re: Blob vs. "normal" columns (internals) difference?

I forgot, lets stay on the edge with C* 1.2.* branch ;) Hvala in lp, *Alan Ristić* *w*: personal blog *t*: @alanristic * l:* linkedin.com/alanristic *m*: ​068 15 73 88​ 2013/4/3 Alan Rist