Re: Node hang on shutdown

Too many open files are common if you haven't set limits properly (/etc/security/limits.conf). But it this case it might be a file descriptor leak. This link can help and is still relevant for C* 2.0:

Re: Cassandra Agent

Can you be more specific? I noticed you're a Stacker ;) So I mean DBaaS like OpenStack Trove. Cassandra support is in progress (targeted for Icehouse release): https://blueprints.launchpad.net/trove/+spec/cassandra-db-support

Re: Cassandra Agent

Polites, isn't a rest API wrapper for Cassandra really, it does more configuration and management of a Cassandra Node. Though it does have a REST API Hi, Nice project Sean! Can't help but thinking about Trove...

Re: What is the best way to install upgrade Cassandra on Ubuntu ?

Don't know why it doesn't include just the preferred Oracle JRE Probably due to licence concerns. Romain

Re: Cassandra shuts down; was:Cassandra crashes

Maybe you should include the end of Cassandra logs. What comes to my mind when I read your first post is OOM killer. But what you describe later is not the case. Just to be sure, have you checked /var/log/messages? Romain De :Jan Algermissen jan.algermis...@nordsc.com A :

Re: Cassandra shuts down; was:Cassandra crashes

shuts down; was:Cassandra crashes Romain, On 04.09.2013, at 11:11, Romain HARDOUIN romain.hardo...@urssaf.fr wrote: Maybe you should include the end of Cassandra logs. There is nothing that seems interesting in cassandra.log. Below you find system.log. What comes to my mind when I read your

RE: Cassandra-shuffle fails

Hi, Failed to enable shuffling is thrown when an IOException occurs in the constructor JMXConnection(endpoint, port). See Shuffle.enableRelocations() in org.apache.cassandra.tools. Have you set up credentials for JMX? Regards, Romain De :Tamar Rosen ta...@correlor.com A :

Re: HsHa

The same goes for us. Romain Alain RODRIGUEZ arodr...@gmail.com a écrit sur 13/08/2013 18:10:05 : De : Alain RODRIGUEZ arodr...@gmail.com A : user@cassandra.apache.org, Date : 13/08/2013 18:10 Objet : Re: HsHa I have this anytime I try to switch to hsha since 0.8. Always kept sync

C* 1.0.6 to 1.1.12: upgradesstables or scrub?

Hi all, We are migrating from C* 1.0.6 to 1.1.12 and after reading DataStax documentation (http://www.datastax.com/docs/1.1/install/upgrading) we are a bit confused. The section Completing the Upgrade, step 6, points out: If you are upgrading from Cassandra 1.1.3 or earlier to Cassandra

Re: C* 1.0.6 to 1.1.12: upgradesstables or scrub?

Yes, forgot to mention we use LCS in 1.0.6. Thank you. Jeremy Hanna jeremy.hanna1...@gmail.com a écrit sur 13/08/2013 16:44:56 : De : Jeremy Hanna jeremy.hanna1...@gmail.com A : user@cassandra.apache.org, Date : 13/08/2013 16:45 Objet : Re: C* 1.0.6 to 1.1.12: upgradesstables or scrub?

Re: Cassandra HANGS after some writes

Naresh, My two cents is that you should run Cassandra on a Linux VM. Issues are more easy to diagnose/pinpoint. Windows is a bit obscure to many people here. Cheers Alexis Rodríguez arodrig...@inconcertcc.com a écrit sur 13/08/2013 16:50:42 : De : Alexis Rodríguez

RE: maximum storage per node

Do you have some fairly complex queries to run against your data? Or your need is just to store large pieces of data? (In which case Object Storage like OpenStack Swift could be more appropriate IMHO) Pruner, Anne (Anne) pru...@avaya.com a écrit sur 25/07/2013 17:45:11 : De : Pruner, Anne

RE: unsubscribe

http://wiki.apache.org/cassandra/FAQ#unsubscribe crig...@cox.net a écrit sur 11/07/2013 02:25:28 : De : crig...@cox.net A : user@cassandra.apache.org, Date : 11/07/2013 02:26 Objet : unsubscribe user@cassandra.apache.org user@cassandra.apache.org Subject: unsubscribe

RE: Real Use Cases in Cassandra !!!

Hi, Have a look at DataStax's customers: http://www.datastax.com/customers varadaraja...@polarisft.com a écrit sur 19/06/2013 12:48:50 : De : varadaraja...@polarisft.com A : user@cassandra.apache.org, Date : 19/06/2013 12:49 Objet : Real Use Cases in Cassandra !!! Team, Can

RE: Coprosessors/Triggers in C*

Not yet but Cassandra 2.0 will provide experimental triggers: https://issues.apache.org/jira/browse/CASSANDRA-1311 Tanya Malik sonichedg...@gmail.com a écrit sur 11/06/2013 04:12:44 : De : Tanya Malik sonichedg...@gmail.com A : user@cassandra.apache.org, Date : 11/06/2013 04:13 Objet :

Re: Cassandra and -server JVM parameter

Hi, In HotSpot 64-bit, only the server JIT is included. Cheers -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Cassandra-and-server-JVM-parameter-tp7588196p7588233.html Sent from the cassandra-u...@incubator.apache.org mailing list archive at

RE Need help in updating metadata of an existing column family

Hi Roshan, Take a peep at http://www.datastax.com/docs/1.1/dml/using_cli#reading-rows-and-columns Hope that helps. Cheers Roshan Dawrani roshandawr...@gmail.com a écrit sur 29/11/2012 11:28:48 : Roshan Dawrani roshandawr...@gmail.com 29/11/2012 11:28 Veuillez répondre à

Re: what is more important (RAM vs Cores)

Hi, Sure it depends... but IMHO 6 GB is suboptimal for big data because it means 1,5 GB or 2 GB for Cassandra. Maybe you could elaborate your use case. You really want a one node cluster ? cheers, Romain wang liang wla...@gmail.com a écrit sur 12/10/2012 10:36:15 : Hi, Hagos, I think it

RE: what is more important (RAM vs Cores)

Also, take into account i/o since they are often a limiting factor.

Re: Order of the cyclic group of hashed partitioners

@aaronmorton http://www.thelastpickle.com On 27/08/2012, at 7:16 PM, Romain HARDOUIN romain.hardo...@urssaf.fr wrote: Thank you Aaron. This limit was pushed down in RandomPartitioner but the question still exists... aaron morton aa

Re: Order of the cyclic group of hashed partitioners

A little clarification. When I talk about exclusive bounds, I mean: compareTo(ZERO) = 0 or compareTo(MAXIMUM) = 0

RE where is cassandra debian packages?

Hi, The url you mentioned is OK: e.g. http://www.apache.org/dist/cassandra/debian/dists/11x/ ruslan usifov ruslan.usi...@gmail.com a écrit sur 24/08/2012 11:26:11 : Hello looks like http://www.apache.org/dist/cassandra/debian is missing (HTTP 404), may be cassandra moved to other debian

Order of the cyclic group of hashed partitioners

Hi, AbstractHashedPartitioner defines a maximum of 2**127 hence an order of (2**127)+1. I'd say that tokens of such partitioners are intented to be distributed in Z/(127), hence a maximum of (2**127)-1. Could there be a mix up between maximum and order? This is a detail but could someone

RE Restore snapshot

No it's not possible Desimpel, Ignace ignace.desim...@nuance.com a écrit sur 01/08/2012 14:58:49 : Hi, Is it possible to restore a snapshot of a keyspace on a live cassandra cluster (I mean without restarting)?

Re: RE Restore snapshot

Then http://www.datastax.com/docs/1.1/operations/backup_restore should mention it :-) Sylvain Lebresne sylv...@datastax.com a écrit sur 02/08/2012 11:45:46 : Actually that's wrong, it is perfectly possible to restore a snapshot on a live cassandra cluster. There is even basically 2

RE items removed from 1.1.0 cfstats output

These settings are global since cassandra 1.1: - Make sure that global settings: key_cache_{size_in_mb, save_period} and row_cache_{size_in_mb, save_period} in conf/cassandra.yaml are used instead of per-ColumnFamily options.

Re: upgrade issue

commitlog_rotation_threshold_in_mb was removed in 1.0.0-beta1 (CASSANDRA-2771). Adeel Akbar adeel.ak...@panasiangroup.com a écrit sur 29/06/2012 15:24:18 : Thanks for the help. Now I am facing another issue; INFO 09:23:45,111 Logging initialized INFO 09:23:45,119 JVM vendor/version:

Re: repair

Run repair -pr in your cron. Tamar Fraenkel ta...@tok-media.com a écrit sur 04/06/2012 13:44:32 : Thanks. I actually did just that with cron jobs running on different hours. I asked the question because I saw that when one of the logs was running the repair, all nodes logged some

Re: Correct way to set strategy options in cqlsh?

You *must* remove the hyphen. According to the csql 2.0 documentation, here is the correct syntax to create keyspace: createKeyspaceStatement ::= CREATE KEYSPACE name WITH optionName = optionVal ( AND optionName = optionVal )*

RE Ordering counters in Cassandra

If I understand you've got a data model which looks like this: CF Events: row1: { event1: 1050, event2: 1200, event3: 830, ... } You can't query on column values but you can build every day a ranking in a dedicated CF by iterating over events: create column family Ranking with

Re: Multi Master replication : rejoining a node after split network

As timestamps are set by clients, a common gotcha is to have all or some clients which are not synchronised by NTP.

RE 200TB in Cassandra ?

Cassandra supports data compression and depending on your data, you can gain a reduction in data size up to 4x. 600 TB is a lot, hence requires lots of servers... Franc Carter franc.car...@sirca.org.au a écrit sur 19/04/2012 13:12:19 : Hi, One of the projects I am working on is going to

Re: By passing Socket communication

Take a peep at cassandra-unit, maybe this could help you : https://github.com/jsevellec/cassandra-unit

Re: Why so many SSTables?

I've just opened a new JIRA: CASSANDRA-4142 I've double checked numbers, 7747 seems to be array list object's capacity (Eclipse Memory Analyzer displays java.lang.Object[7747] @ 0x7d3f3f798). Actually there are 5757 browsable entries in EMA therefore each object is about 140 KB (size varies

Re: Why so many SSTables?

throughput, you can increase compaction_throughput_mb_per_sec in cassandra.yaml to reduce pending compactions. maki 2012/4/10 Romain HARDOUIN romain.hardo...@urssaf.fr: Hi, We are surprised by the number of files generated by Cassandra. Our cluster consists of 9 nodes and each

Why so many SSTables?

Hi, We are surprised by the number of files generated by Cassandra. Our cluster consists of 9 nodes and each node handles about 35 GB. We're using Cassandra 1.0.6 with LeveledCompactionStrategy. We have 30 CF. We've got roughly 45,000 files under the keyspace directory on each node: ls -l

<    1   2