Re: Disappearing index data.

2013-10-09 Thread Tom van den Berge
The suggested fix to run a major compaction on the index column family unfortunately didn't help. Though, rebuilding the index (nodetool rebuild_index) fixed it. This bug appears to be almost the same as https://issues.apache.org/jira/browse/CASSANDRA-5732, (and some of the related bugs mentioned

Re: Any suggestions about running Cassandra on Windows servers for production use?

2013-10-09 Thread Vassilis Bekiaris
Hi Rob, thanks for your insight on the matter. We will put together a benchmark and hopefully get back with some meaningful results. We have a pair of identical servers and intend to run YCSB workloads on default datastax Cassandra community edition installations on Ubuntu Windows. Any

us mapreduce chaining jobs with cassandra columnfamily

2013-10-09 Thread Anseh Danesh
Hi all. I have a question. how can we use Mapreduce Chaining Jobs with cassandra columnFamily input? I use mapreduce chaining job ang it can not fined my input column family for job1..? Configuration conf1 = new Configuration(); Configuration conf2 = new Configuration(); Job job1

RE: cassandra hadoop reducer writing to CQL3 - primary key - must it be text type?

2013-10-09 Thread John Lumby
I don't know what happened to my original post but it got truncated. Let me try again :     software versions : apache-cassandra-2.0.1    hadoop-2.1.0-beta I have been experimenting with using hadoop for a map/reduce operation on cassandra, outputting to the CqlOutputFormat.class. I based my

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2013-10-09 Thread Leonid Ilyevsky
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Deleting data using timestamp

2013-10-09 Thread Ravikumar Govindarajan
We have wide-rows accumulated in a cassandra CF and now changed our app-side logic. The application now only wants first 7 days of data from this CF. What is the quick way to delete old-data and at the same time make sure read does churn through all deleted columns? Lets say I do the following

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2013-10-09 Thread Tim Dunphy
Please read http://mail-archives.apache.org/mod_mbox/cassandra-user/ Sent from my iPhone On Oct 9, 2013, at 9:42 AM, Leonid Ilyevsky lilyev...@mooncapital.com wrote: Unsubscribe This email, along with any attachments, is confidential and may be legally privileged or otherwise protected

Online shop with Cassandra

2013-10-09 Thread cbert...@libero.it
Hi all, for an online shop owned by my company I would like to remove MySQL for everything concerning the frontend and use Cassandra instead. The site has more than a million visit each day but what we need to know is Products (deals) are divided for cities Each product can stay online for X

Re: Deleting data using timestamp

2013-10-09 Thread Shahab Yunus
I might be missing something obvious here but can't you afford (time-wise) to run cleanup or repair after the deletion so that the deleted data is gone? Assuming that your columns are time-based data? Regards, Shahab On Wed, Oct 9, 2013 at 10:35 AM, Ravikumar Govindarajan

RE: Facebook Cassandra

2013-10-09 Thread Baskar Duraikannu
Thanks. Date: Sun, 6 Oct 2013 11:48:42 -0400 Subject: Re: Facebook Cassandra From: edlinuxg...@gmail.com To: user@cassandra.apache.org As it relates to c* http://www.cs.cornell.edu/Projects/ladis2009/papers/Lakshman-ladis2009.PDF We have built, implemented, and operated a storage sys-tem

Re: Online shop with Cassandra

2013-10-09 Thread Hiller, Dean
Read the paper Building on Quicksand especially the section where he describes what they do at AmazonŠthe apology modelŠie. Allow overbooking and apologize but limit overbookingŠ.That is one way to go and stay scalable. You may want to analyze the percentage change that overbooking can be as

Re: Deleting data using timestamp

2013-10-09 Thread Robert Coli
On Wed, Oct 9, 2013 at 7:35 AM, Ravikumar Govindarajan ravikumar.govindara...@gmail.com wrote: What is the quick way to delete old-data and at the same time make sure read [doesn't] churn through all deleted columns? Use a database that isn't log structured? But seriously, in 2.0 there's

Re: Deleting data using timestamp

2013-10-09 Thread Shahab Yunus
Ahh, yes, 'compaction'. I blanked out while mentioning repair and cleanup. That is in fact what needs to be done first and what I meant. Thanks Robert. Regards, Shahab On Wed, Oct 9, 2013 at 1:50 PM, Robert Coli rc...@eventbrite.com wrote: On Wed, Oct 9, 2013 at 7:35 AM, Ravikumar

RE: cassandra hadoop reducer writing to CQL3 - primary key - must it be text type?

2013-10-09 Thread John Lumby
From: johnlu...@hotmail.com To: user@cassandra.apache.org Subject: RE: cassandra hadoop reducer writing to CQL3 - primary key - must it be text type? Date: Wed, 9 Oct 2013 09:40:06 -0400 software versions : apache-cassandra-2.0.1

Re: Multi-dc restart impact

2013-10-09 Thread Chris Burroughs
I have not been able to do the test with the 2nd cluster, but have been given a disturbing data point. We had a disk slowly fail causing a significant performance degradation that was only resolved when the sick node was killed. * Perf in DC w/ sick disk: http://i.imgur.com/W1I5ymL.png?1 *

Re: Failed to solve Digest mismatch

2013-10-09 Thread Jason Tang
I did some test on this issue, and it turns out the problem caused by local time stamp. In our traffic, the update and delete happened very fast, within 1 seconds, even within 100ms. And at that time, the ntp service seems not work well, the offset is same times even larger then 1 second. Then