Re: Installation

Jim, A wide variety of OSes can be used, but Linux is the most popular. You can start here for installation instructions: http://www.datastax.com/documentation/getting_started/doc/getting_started/gsInstallCassandra.html . -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting

Re: Installing Cassandra Multinode on CentOs coming up with exception

n(CassandraDaemon.java:585) >>>>>>> Caused by: Can't construct a java object for >>>>>>> tag:yaml.org,2002:org.apache.cassandra.config.Config; >>>>>>> exception=Cannot create property=seed_provider for >>>>>>> JavaBean=org.apache.cassandra.config.Config@676c6370; >>>>>>> java.lang.reflect.InvocationTargetException >>>>>>> in 'reader', line 1, column 1: >>>>>>> cluster_name: 'pcross' >>>>>>> ^ >>>>>>> >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:333) >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182) >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.BaseConstructor.constructDocument(BaseConstructor.java:141) >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:127) >>>>>>> at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:481) >>>>>>> at org.yaml.snakeyaml.Yaml.loadAs(Yaml.java:475) >>>>>>> at >>>>>>> org.apache.cassandra.config.YamlConfigurationLoader.loadConfig(YamlConfigurationLoader.java:93) >>>>>>> ... 5 more >>>>>>> Caused by: org.yaml.snakeyaml.error.YAMLException: Cannot create >>>>>>> property=seed_provider for >>>>>>> JavaBean=org.apache.cassandra.config.Config@676c6370; >>>>>>> java.lang.reflect.InvocationTargetException >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.constructJavaBean2ndStep(Constructor.java:299) >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.construct(Constructor.java:189) >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.Constructor$ConstructYamlObject.construct(Constructor.java:331) >>>>>>> ... 11 more >>>>>>> Caused by: org.yaml.snakeyaml.error.YAMLException: >>>>>>> java.lang.reflect.InvocationTargetException >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.Constructor$ConstructSequence.construct(Constructor.java:542) >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.BaseConstructor.constructObject(BaseConstructor.java:182) >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.Constructor$ConstructMapping.constructJavaBean2ndStep(Constructor.java:296) >>>>>>> ... 13 more >>>>>>> Caused by: java.lang.reflect.InvocationTargetException >>>>>>> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native >>>>>>> Method) >>>>>>> at >>>>>>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) >>>>>>> at >>>>>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) >>>>>>> at java.lang.reflect.Constructor.newInstance(Constructor.java:526) >>>>>>> at >>>>>>> org.yaml.snakeyaml.constructor.Constructor$ConstructSequence.construct(Constructor.java:540) >>>>>>> ... 15 more >>>>>>> Caused by: java.lang.NullPointerException >>>>>>> at >>>>>>> org.apache.cassandra.config.SeedProviderDef.(SeedProviderDef.java:33) >>>>>>> ... 20 more >>>>>>> Invalid yaml >>>>>>> >>>>>>> >>>>>>> I am not sure exactly whats making it to throw NullPointer and halt >>>>>>> the process. >>>>>>> >>>>>>> Expert Advice would be appreciated! >>>>>>> URGENT! >>>>>>> >>>>>>> Thanks! >>>>>>> >>>>>> >>>>>> >>>>> >>>> >>> >> > -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: How to get rid of stale info in gossip

persisting for longer? > > > Mark > > > On Fri, Jul 25, 2014 at 11:33 AM, Rahul Neelakantan > wrote: > >> Is there a way to get rid of stale information that shows up for >> removed/dead nodes in gossip, without a complete cluster bounce? >> >> Ra

Re: Changes in the Metrics MBean

t;> feature added? >> Also, how can we determine in which version the changes are made in >> general? >> Thanks in advance. >> >> Regards, >> Bhavishya Palukurthi >> > > -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: data type is object when metric instrument using Gauge?

o implement the datatype of gauge as numeric types instead > of object, or other way around for example using metric reporter...etc? > > Thanks a lot for any suggestion! > > Best Regard! > Mike > > > > -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: Node bootstrap

n issue? > > Any other insight is appreciated? > > Ruchir. > > > -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: Why is yum pulling in open JDK ?

le the latter installs Apache Cassandra 2.0 Cheers, -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: Write Failed, COPY on cqlsh with rpc_timeout‏

Sharaf, Do the logs show any errors while you're trying to insert into Cassandra? -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: Suggestions for upgrading cassandra

time (rolling upgrade) For a change this major, you should set up a test cluster and see if there are any changes after the upgrade. -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: Memory issue

On Wed, May 21, 2014 at 12:59 AM, opensaf dev wrote: > When I run as user cassandra, it starts and runs fine. Why do you want to run Cassandra as a different user? -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: Filtering on Collections

g able to be a primary key, no? > > > On Mon, May 19, 2014 at 1:54 PM, Patricia Gorla < > patri...@thelastpickle.com> wrote: > >> Raj, >> >> Secondary indexes across CQL3 collections were introduced into 2.1 beta1, >> so will be available in future version

Re: Filtering on Collections

y. >> Would you recommend collections for modeling from a performance >> perspective? >> >> Raj >> -- >> >> Data Architect ❘ Zephyr Health >> 589 Howard St. ❘ San Francisco, CA 94105 >> m: +1 9176477433 ❘ f: +1 415 520-9288 >> o: +1 415 529-7649

Re: Cassandra slow on PasswordAuthenticator

Bhaskarjya, The latency you're seeing is likely just the cost of using authentication. Cheers, -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re:

ore without details. Cheers, -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: Some questions to adding a new datacenter into cassandra cluster.

node per availability zone, and 3 seed nodes per DC. If you add a new DC into the cluster, the safe route would be to update the seed list across all nodes. Cheers, -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: Backup procedure

the commitlog folder and > cassandra will pick and execute the right thing? > You'll want to use 'nodetool drain<http://www.datastax.com/documentation/cassandra/2.0/cassandra/tools/toolsDrain.html>' beforehand to avoid this issue. This makes the node unavailable for

Re: Opscenter help?

- Were you running a mixed EL5/EL6 environment? - What exact version of Cassandra were you upgrading from? As for SE, you have to amass a bit of their magic points before you can start to take more actions (tagging, down-voting, etc). Surprisingly good at keeping down spam. -- Patricia Gorla

Re: How to transfer data from Oracle into Cassandra

; transactional data and move the static data(not very frequently change) we > use for searching to Cassandra. > > > > Thnx > -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: what tool will create noncql columnfamilies in cassandra 3a

major. > > How will users adjust the meta data of non cql column families and other > cfs that do not fit into the cql model? > > -- > Sorry this was sent from mobile. Will do less grammar and spell check than > usual. > -- Patricia Gorla @patriciagorla Consultant Ap

Re: Moving from relational to Cassandra, how to handle intra-table relationships?

ir own, perhaps I should > store the data as serialized JSON in its own column of the parent. > > All thoughts appreciated! > > Thanks. > > Les > > -- Patricia Gorla @patriciagorla Consultant Apache Cassandra Consulting http://www.thelastpickle.com <http://thelastpickle.com>

Re: Cluster Management

Anthony, We use a number of tools to manage our Cassandra cluster. * Datastax OpsCenter [0] for at a glance information, and trending statistics. You can also run operations through here, though I prefer to use nodetool for any mutative operation. * nodetool for ad hoc status checks, and day-to-d

Re: CPU Bound Writes

Kanwar, This is because writes are appends to the commit log, which is stored on disk, not memory. The commit log is then flushed to the memtable (in memory), before being written to an sstable on disk. So, most of the actions in sending out a write are writing to disk. Also see: http://www.data