Re: Traffic inconsistent across nodes

We have two DC one with the above 8 nodes and other with 3 nodes. On Tue, Apr 12, 2016 at 8:06 PM, Eric Stevens wrote: > Maybe include nodetool status here? Are the four nodes serving reads in > one DC (local to your driver's config) while the others are in another? > > On

Debugging out of memory

Hi, We have an application that reads data from a set of external sources and loads them into our cassandra cluster. The load goes ok for some time (~24h) and then some servers in the cluster starts flapping between being down and up, and finally they go out of memory. The cluster consists of 5

Re: Latency overhead on Cassandra cluster deployed on multiple AZs (AWS)

Hi Jack, As mentioned before I've used m3.xlarge instance types together with two ephemeral disks in raid 0 and, according to Amazon, they have "high" network performance. I ran many tests starting with a brand-new cluster every time and I got consistent results. I believe there's something

Re: performance question

Facets can be used, and grouping of results as well, in DSE Search (Solr), but there are a lot of different approaches that can be used, depending on the specific user experience you require. -- Jack Krupansky On Tue, Apr 12, 2016 at 9:32 PM, Gross, Daniel wrote: > Hi

RE: performance question

Hi Jack, Thank you for your response. How does one deal with the taxonomy (categories) in searches like this. For example, one could enter shirt, and then add a number of criteria, while shirt has sub-categories of Shirts. Another issue might be a subcategory not having an attribute. How is

performance question

Hi, I am new to Cassandra. I am wondering how well does Cassandra perform in e-commerce applications that have large taxonomies for products with many user searchable product attributes; when many concurrent users in fact submit multi criteria searchers for products: E.g. Shirt, white, size

Re: Latency overhead on Cassandra cluster deployed on multiple AZs (AWS)

Are you in VPC or EC2 Classic? Are you using enhanced networking? On Tue, Apr 12, 2016 at 9:52 AM, Alessandro Pieri wrote: > Hi Jack, > > As mentioned before I've used m3.xlarge instance types together with two > ephemeral disks in raid 0 and, according to Amazon, they have

Re: performance question

It tends to do very well for that. Storage and modifications are what is more expensive.. On Tue, Apr 12, 2016 at 8:07 PM, Gross, Daniel wrote: > Hi, > > > > I am new to Cassandra. > > > > I am wondering how well does Cassandra perform in e-commerce applications > that

Cassandra Golang Driver and Support

Hi, It looks like to me that DataStax doesn't provide official golang driver yet and the goland client libs are overall lagging behind the Java driver in terms of feature set, supported version and possibly production stability? We are going to support a large number of services in both Java

Re: performance question

Usually one would go with a search engine such as Solr or Elasticsearch for an e-commerce product catalog query.. Ad-doc and complex queries are generally an antipattern for Cassandra, but you can use the Stratio plugin to do multi-column Lucene search or DataStax Enterprise Search to perform

DSE Search : NPE when executing Solr CQL queries using solr_query

hi, I am facing an issue where Solr queries executed from cqlsh using the solr_query field is throwing an NPE in system.log, while cqlsh shows the following error: Unable to complete request: one or more nodes were unavailable. These queries work fine thru the Solr admin console UI. Below is

Re: Single node Solr FTs not working

Hi, Fixed this problem finally. The "*name*" attribute for fieldInputTransformer and fieldOutputTransformer in the solrconfig.xml MUST have the value "*dse*" . This was the value given in documentation and the FT blog. I had changed it to a different name to make it more readable, and seems it

Re: *** How to bring up one of the Nodes which is down ***

Hi Lokesh, This may sounds a bit silly but... What about starting Cassandra process in that box? Regards, Carlos Alonso | Software Engineer | @calonso On 11 April 2016 at 19:16, Lokesh Ceeba - Vendor wrote: > Team, > >

Re: Latency overhead on Cassandra cluster deployed on multiple AZs (AWS)

Thanks Chris for your reply. I ran the tests 3 times for 20 minutes/each and I monitored the network latency in the meanwhile, it was very low (even the 99th percentile). I didn't notice any cpu spike caused by the GC but, as you pointed out, I will look into the GC log, just to be sure. In

RE: *** How to bring up one of the Nodes which is down ***

Hi Lokesh, Please check your Cassandra logs for the downed too and see any exception traces are there or not. From: Carlos Alonso [mailto:i...@mrcalonso.com] Sent: Tuesday, April 12, 2016 3:59 PM To: user@cassandra.apache.org Subject: Re: *** How to bring up one of the Nodes which is down ***

Re: unsubscribe

'unsubscribe cassandra' in google search (probably not the best keywords): Result 1: http://www.planetcassandra.org/apache-cassandra-mailing-lists/ Result 2: http://mail-archives.apache.org/mod_mbox/cassandra-user/ Result 3: http://cassandra.apache.org/ I did the work for you: sending a message

Re: unsubscribe

'unsubscribe cassandra' in google search (probably not the best keywords): Result 1: http://www.planetcassandra.org/apache-cassandra-mailing-lists/ Result 2: http://mail-archives.apache.org/mod_mbox/cassandra-user/ Result 3: http://cassandra.apache.org/ I did the work for you: sending a message

Re: unsubscribe

'unsubscribe cassandra' in google search (probably not the best keywords): Result 1: http://www.planetcassandra.org/apache-cassandra-mailing-lists/ Result 2: http://mail-archives.apache.org/mod_mbox/cassandra-user/ Result 3: http://cassandra.apache.org/ I did the work for you: sending a message

Re: Traffic inconsistent across nodes

Maybe include nodetool status here? Are the four nodes serving reads in one DC (local to your driver's config) while the others are in another? On Tue, Apr 12, 2016, 1:01 AM Anishek Agarwal wrote: > hello, > > we have 8 nodes in one cluster and attached is the traffic

Re: DSE Search : NPE when executing Solr CQL queries using solr_query

You'll have to use StackOverflow or DataStax for support on DSE Search. It looks like you have a Field Output Transformer ( *UserFieldOutputTransformer.java*). The NPE might be related to processing that occurs there - try removing this FOT and see if the NPE still occurs. For example, maybe the