Re: 200TB in Cassandra ?

2012-04-20 Thread Franc Carter
On Fri, Apr 20, 2012 at 6:27 AM, aaron morton wrote: > Couple of ideas: > > * take a look at compression in 1.X > http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-compression > * is there repetition in the binary data ? Can you save space by > implementing content addressable storage ?

RE: default required in cassandra-topology.properties?

2012-04-20 Thread Richard Lowe
As far as I know it's not possible to leave replication factor undefined - if you do then Cassandra will default to RF=1 with SimpleStrategy. The topology is local to each node, so unless all your nodes have the same topology file then it's possible for them each to have a different idea about

Re: User authorized for cannot create CFs

2012-04-20 Thread Michal Michalski
Thanks for your reply, problem is solved. First, I missunderstood the modify-keyspace param and then I just missed the fact that I can do simply: test.=operator without any wildcards or so. I even tried this solution before and - after looking into the source code - I was sure it just has to w

Re: 200TB in Cassandra ?

2012-04-20 Thread Jake Luciani
What other solutions are you considering? Any OLTP style access of 200TB of data will require substantial IO. Do you know how big your working dataset will be? -Jake On Fri, Apr 20, 2012 at 3:30 AM, Franc Carter wrote: > On Fri, Apr 20, 2012 at 6:27 AM, aaron morton wrote: > >> Couple of ideas

Long type column names in reverse order

2012-04-20 Thread Tarun Gupta
Hi, My requirements is to get retrieve column values, sorted by column names in reverse order (column names are 'long' type). The way I am trying to implement this is by using a custom comparator. I have written the custom comparator by using 'org.apache.cassandra.db.marshal.BytesType' and alterin

Re: Long type column names in reverse order

2012-04-20 Thread Edward Capriolo
I think you can drop the compiler since that feature already exists. http://thelastpickle.com/2011/10/03/Reverse-Comparators/ On Fri, Apr 20, 2012 at 12:57 PM, Tarun Gupta wrote: > Hi, > > My requirements is to get retrieve column values, sorted by column names in > reverse order (column names

Re: Two Random Ports in Private port range

2012-04-20 Thread Kirk True
Are these the dynamic JMX ports? Sent from my iPad On Apr 19, 2012, at 8:58 AM, W F wrote: > Hi All, > > I did a web search of the archives (hope I looked in the right place) and > could not find a request like this. > > When Cassandra is running, it seems to create to random tcp listen port

Re: Two Random Ports in Private port range

2012-04-20 Thread W F
Yes, they are. What are they used for and are they specifically documented somewhere? Thanks! On Fri, Apr 20, 2012 at 11:25 AM, Kirk True wrote: > Are these the dynamic JMX ports? > > Sent from my iPad > > On Apr 19, 2012, at 8:58 AM, W F wrote: > > Hi All, > > I did a web search of the archi

AUTO: Ken Robbins is out of the office

2012-04-20 Thread Ken Robbins
I am out of the office until 04/21/2012. I will be out of the office and away from a computer for most of Friday (4/20). For urgent operational issues (including anything customer affecting), please send me a text at 781-856-0078. Note: This is an automated response to your message "Re: 200T

Help with Wide Rows with CounterColumns

2012-04-20 Thread Praveen Baratam
Hello All, I have a particular requirement where I need to update CounterColumns in a Row by a specific UID which is the key for the CounterColumn in that row and then query for those columns in that Row such that we get the top 5 UIDs with highest Counter Values. create column family Counters

Re: Long type column names in reverse order

2012-04-20 Thread Tarun Gupta
Thanks, This post helped a lot, I discovered that the built-in comparators have a static instance called *reverseComparator.* My exact requirement was to create an API that allows creating a Column family with the required parameters, one such parameter was a flag that indicates the column order. I

Kundera 2.0.6 Released

2012-04-20 Thread Vivek Mishra
Hi All, We are happy to announce release of Kundera 2.0.6. Kundera is a JPA 2.0 based, object-datastore papping library for NoSQL datastores. The idea behind Kundera is to make working with NoSQL Databases drop-dead simple and fun. It currently supports Cassandra, HBase, MongoDB and relational da

Release: OpsCenter 2.0

2012-04-20 Thread Nick Bailey
Hey everyone, This past week we released OpsCenter 2.0. The main updates to the community version of this release are centered around performance and stability. These updates should greatly improve performance, especially in larger clusters. Some of the highlights include: * Refactoring of metri

Re: 200TB in Cassandra ?

2012-04-20 Thread Franc Carter
On Sat, Apr 21, 2012 at 1:05 AM, Jake Luciani wrote: > What other solutions are you considering? Any OLTP style access of 200TB > of data will require substantial IO. We currently use an in-house written database because when we first started our system there was nothing that handled our probl

Cql 3 wide rows filter expressions in where clause

2012-04-20 Thread Nagaraj J
Hi cql 3 for wide rows is very promising. I was wondering if there is support for filtering wide rows by additional filter expressions in where clause (columns other than those which are part of the composite). Ex. suppose i have sparse cf create columnfamily scf( k ascii, o ascii, x ascii, y