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__ Charley Rich VP, Product Management, jKool and Nastel cr...@nastel.com 631.761.9100x9128 linkedin.com/in/charleyrich [Nastel Technologies] The information contained in this e-mail and in any attachment is co

Timeout while waiting for workers when flushing pool

Any ideas on whether it's still the same deadlock issue or something else? Thanks, Charles

RE: Decommissioned node shows up in the gossip log

, Zhang, Charles mailto:cong.zh...@fmr.com>> wrote: I decommissioned a seed node from the cluster but now it still shows up in the log files but does not show up in “nodetool status”. The steps I took to decommission this seed node was first I added another node to the seed node list and

MigrationManager.java:164 - Migration task failed to complete

I have seen a bunch of them in the log files of some newly joined nodes. I did a search in google and it seems increasing the countdown latch timeout can solve this problem. But I assume it only resolves it for future nodes when joining happens? For the existing nodes, anything needs to be done?

Decommissioned node shows up in the gossip log

9184734792478964742, 955142821741666815, 998590089428154995] for /10.240.131.52 10.240.131.52 is the node I decommissioned and now it does not show up in "nodetool status"... What does this issue impact (assuming this is an issue)? And how should I fix it? Charles

RE: Data visualization tools for Cassandra

Take a look at jKool, a DataStax partner at jKoolCloud.com. It provides visualization for data in DSE. Regards, Charley From: Gene [mailto:gh5...@gmail.com] Sent: Tuesday, October 20, 2015 1:17 PM To: user@cassandra.apache.org Subject: Re: Data visualization tools for Cassandra Have you looke

Re: Replication to second data center with different number of nodes

gt;" mailto:user@cassandra.apache.org>> Date: Friday, 27 March 2015 12:11 To: user mailto:user@cassandra.apache.org>> Subject: Re: Replication to second data center with different number of nodes 2015-03-27 11:58 GMT+01:00 Sibbald, Charles mailto:charles.sibb...@bskyb.com>>: Cassandra’

Re: Replication to second data center with different number of nodes

I would recommend you utilise Cassandra’s Vnodes config and let it manage this itself. This means it will create these and a mange them all on its own and allows quick and easy scaling and boot strapping. From: Björn Hachmann mailto:bjoern.hachm...@metrigo.de>> Reply-To: "user@cassandra.apache

Re: Store data with cassandra

Sounds like this is a job for jackrabbit ? http://jackrabbit.apache.org From: Ali Akhtar mailto:ali.rac...@gmail.com>> Reply-To: "user@cassandra.apache.org" mailto:user@cassandra.apache.org>> Date: Friday, 20 March 2015 15:58 To: "user@cassandra.apache.org

Re: Cassandra Dead but pid file exists

Check your cassandra.yaml config file. Seems you have a misconfigured file path in there From: Mohit Garg mailto:gargmohit3...@gmail.com>> Reply-To: "user@cassandra.apache.org" mailto:user@cassandra.apache.org>> Date: Wednesday, 4 March 2015 09:14 To: "user@cass

Re: Upgrading from 1.2 to 2.1 questions

Hi Oleg, What is the minor version of 1.2? I am looking to do the same for 1.2.14 in a very large cluster. Regards Charles On 02/02/2015 13:33, "Oleg Dulin" wrote: >Dear Distinguished Colleagues: > >We'd like to upgrade our cluster from 1.2 to 2.0 and then to 2.1

Re: Upgrading from Cassandra 1.2.14 to Cassandra 2.10

Hi Carlos, We are running 1.2.14 which is higher than 1.2.9 so I have an assumption that the network layer is compatible, or do you specifically mean that 2.10 is not compatible with 1.2.x ? Regards Charles From: Carlos Rolo mailto:r...@pythian.com>> Reply-To: "user@cassandra

Upgrading from Cassandra 1.2.14 to Cassandra 2.10

rather than an inplace upgrade. Does anyone foresee any issues with this. Thanks in advance. Regards Charles Information in this email including any attachments may be privileged, confidential and is intended exclusively for the addressee. The views expressed may not be official policy, but the

Re: Auto-Bootstrap not Auto-Bootstrapping?

Trick the seed node but removing itself from the yaml file, then start it up. On Mon, Apr 7, 2014 at 7:22 PM, Jonathan Lacefield wrote: > Hello > > Not sure I follow the auto bootstrap question, but seeds are only > used on startup. Also, what do you mean by convert the node to a > seed node

Re: Best version to upgrade from 1.1.10 to 1.2.X

and payed careful attention to the NEWS.txt upgrade notices. I did a full cluster restart and NOT a rolling upgrade. It went without a hitch. Charles On Tue, Sep 24, 2013 at 2:33 PM, Paulo Motta wrote: > Cool, sounds fair enough. Thanks for the help, Rob! > > If anyone has upgraded

Re: Size Tiered -> Leveled Compaction

I second these questions: we've been looking into changing some of our CFs to use leveled compaction as well. If anybody here has the wisdom to answer them it would be of wonderful help. Thanks Charles On Wed, Feb 13, 2013 at 7:50 AM, Mike wrote: > Hello, > > I'm investiga

Fixing the schema for a Column Family

alidation_class:CounterColumnType } ]; Also, FWIW, if I describe the schema of my busted CF, I see the following errors: Unexpected table structure; may not translate correctly to CQL. expected composite key CF to have column aliases, but found none Unexpected table structure; may not translate correctly to CQL. expected [u'rk'] length to be 2, but it's 1. Thanks! Charles

Re: Running repair negatively impacts read performance?

settle" or some such. Thanks Charles On Fri, Sep 28, 2012 at 7:20 AM, Charles Brophy wrote: > Odd indeed. > > 1) It is observable after the compactions are through and the system has > "settled" > 2) We're using SizeTiered strategy > 3) CentOS 6 & Oracle

Re: Running repair negatively impacts read performance?

rom cf stats ? > > Do you have some read latency numbers from cfstats ? > Also, could you take a look at cfhistograms ? > > Cheers > > > - > Aaron Morton > Freelance Developer > @aaronmorton > http://www.thelastpickle.com > > On 26/09

Re:

until a service restart if you leave this enabled. The text of this setting is not explicit about the long-term cache shrinkage, so it's easy to think that it will restore the cache to its configured size after the pressures have subsided. It won't. Charles On Tue, Sep 25, 2012 at 8:1

Running repair negatively impacts read performance?

'm using 1.1.3 and Oracle JDK 1.6.31 The column family is a stanard type and I've noticed this exact behavior regardless of the key/column/value serializers in use. Charles

Re: Invalid Counter Shard errors?

I have a very reliable repro case on our cluster involving nodetool repair. I posted a summary in a comment on the issue. Let me know if more details are needed. Charles On Fri, Sep 7, 2012 at 8:35 AM, Sylvain Lebresne wrote: > > Is there a way to fix this error ? What is its impact on m

Sudden massive counter increments on node restart

:886) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) at java.lang.Thread.run(Thread.java:662) Thanks Charles

Re: Invalid Counter Shard errors?

Ok, will do. Thanks for the reply. C -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Invalid-Counter-Shard-errors-tp7580163p7580189.html Sent from the cassandra-u...@incubator.apache.org mailing list archive at Nabble.com.

Invalid Counter Shard errors?

e but the errors are constant. What is the best course of action? Google only turns up the source code for these errors. Thanks! Charles

Re: Multiget_slice or composite column keys?

01/05/2011 > > If you often want to read certain keys for a single day (or a few days) > consider pivoting the data so the key is the date and the columns are the > current row keys. > > Hope that helps. > > - > Aaron Morton > Freelance Cassandra Dev

Multiget_slice or composite column keys?

yway, any thoughts/tips appreciated. Thanks, Charles

Re: low performance inserting

I have understood my error. I was comparing bulk insert in MySQL with batch_insert in Cassandra I made this two tests from a remote machine I have made the same test with one insert per row in MySQL and it took 4mn28s but the result I have with the stress utility it seems to be abnormal, isn't it

Re: low performance inserting

Hi Sylvain, thanks for your answer. I'd make a test with the stress utility inserting 100 000 rows with 10 columns per row I use these options: -o insert -t 5 -n 10 -c 10 -d 192.168.1.210,192.168.1.211,... result: 161 seconds with MySQL using inserts (after a dump): 1.79 second Ch

low performance inserting

Hello everybody, first: sorry for my english in advance!! I'm getting started with Cassandra on a 5 nodes cluster inserting data with the pycassa API. I've read everywere on internet that cassandra's performance are better than MySQL because of the writes append's only into commit logs files. W

Re: Double ColumnType and comparing

Or maybe convert double to long, just as hector's DoubleSerializer does https://github.com/rantav/hector/blob/master/core/src/main/java/me/prettyprint/cassandra/serializers/DoubleSerializer.java I was happy to use it here. Tks, - Eric On 14/03/2011 02:52, aaron morton wrote: There is nothing in

Re: Is it possible to get list of row keys?

d you got following result. keyabc key456 keydsg key8jkg keyag87 key45s ... Then if you call with setKeys("keydsg","") again, you will get following result. keydsg key8jkg keyag87 key45s ... Regards, Chen www.evidentsoftware.com <http://www.evidentsoftware.com>

Re: Is it possible to get list of row keys?

Hi, I'm also facing the need to retrieve all row keys. What do you mean with "stable" order? From this thread, I understand paging method with RandomPartitioner will return all keys (shuffled, but missing key, no double key). This seems to have already told, but I prefer to double-check... Tks

Re: django or pylons

different ORM, would it make more sense to use > pylons over django? > > From what I understand, pylons assumes less as compared to django. > -- --- Thanks, Charles Woerner

Re: java.lang.RuntimeException: java.io.IOException: Value too large for defined data type

Benjamin Black b3k.us> writes: > > I am only saying something obvious: if you don't have sufficient > resources to handle the demand, you should reduce demand, increase > resources, or expect errors. Doing lots of writes without much heap > space is such a situation (whether or not it is happen

Re: java.lang.RuntimeException: java.io.IOException: Value too large for defined data type

Benjamin Black b3k.us> writes: > > Then write slower. There is no free lunch. > > b Are you implying that clients need to throttle their collective load on the server to avoid causing the server to fail? That seems undesirable. Is this a side effect of a server bug, or is it part of the int

Re: http://voltdb.com/ ?

I don't know, I'd ask them directly. When I looked at it I was more interested in the throughput and acid compliance aspects of it. -- Thanks, Charles Woerner On Jun 9, 2010, at 2:56 PM, "Parsacala Jr, Nazario R. [Tech]" > wrote: So what is the size limit for volt

Re: http://voltdb.com/ ?

;t believe so. -- Thanks, Charles Woerner On Jun 9, 2010, at 2:35 PM, Ned Wolpert wrote: As far as finding its competitors go; If you need acid compliance, Cassandra isn't in the list. If you need 50TB of data, is VoltDB in the list? On Wed, Jun 9, 2010 at 2:30 PM, Charles

Re: http://voltdb.com/ ?

rough redundant copies of the data and fully acid compliant. -- Thanks, Charles Woerner On Jun 9, 2010, at 12:09 PM, AJ Slater wrote: Its proper competitors are stuff like redis and memcached. On Fri, Jun 4, 2010 at 8:19 AM, Jones, Nick wrote: I saw a tweet about claiming far better performan

Re: Accessing Cassandra from R

t; Project Chair, Apache Cassandra > co-founder of Riptano, the source for professional Cassandra support > http://riptano.com > -- --- Thanks, Charles Woerner