Re: SSTable structure

2015-03-30 Thread Kirk True
The tricky thing with documenting the SS tables is that there are a lot of conditionals in the structure, so it makes for twisty reading. Just for fun, here's a terrible start I made once: https://github.com/mustardgrain/cassandra-notes/blob/master/SSTables.md On Mon, Mar 30, 2015, at 05:12 PM,

10,000s of column families/keyspaces

2013-07-01 Thread Kirk True
was curious about how to quantify the overhead of a column family. Is the reason performance? Memory? Does the off-heap work help here? Thanks, Kirk [1] The main three reasons: 1. ability to wholesale drop data for a given tenant via drop keyspace/drop CFs 2. ability to have divergent schema

Re: read request distribution

2012-11-12 Thread Kirk True
factor of three)). Kirk On Mon, Nov 12, 2012, at 03:52 PM, Ananth Gundabattula wrote: Hi all, On an unrelated observation of the below readings, it looks like all the 3 nodes own 100% of the data. This confuses me a bit. We have a 12 node cluster with RF=3 but the effective ownership is shown

Re: Data Modeling: Comments with Voting

2012-09-26 Thread Kirk True
Depending on your needs, you could simply duplicate the comments in two separate CFs with the column names including time in one and the vote in the other. If you allow for updates to the comments, that would pose some issues you'd need to solve at the app level. On 9/26/12 4:28 PM, Drew

Re: Batch update efficiency with composite key

2012-07-20 Thread Kirk True
-in-cql-3-0 It will still be a no look write. The exception being secondary indexes and counters which include reads in the write path. Cheers - Aaron Morton Freelance Developer @aaronmorton http://www.thelastpickle.com On 20/07/2012, at 10:26 AM, Kirk True wrote: In Cassandra you

Re: Inability to drop column families

2012-07-19 Thread Kirk
What does show schema show? Is the CF showing up? Are the data files for the CF on disk? If you poke around with the system CFs, is there any data still present? On 07/17/2012 02:54 PM, sj.climber wrote: Looking for ideas on how to diagnose this issue. I have installed v1.1.2 on a two-node

Re: Replication factor - Consistency Questions

2012-07-19 Thread Kirk True
But isn't QUORUM on a 2-node cluster still 2 nodes? On 07/17/2012 11:50 PM, Jason Tang wrote: Yes, for ALL, it is not good for HA, and because we meet problem when use QUORAM, and current solution is switch Write:QUORAM / Read:QUORAM when got UnavailableException exception. 2012/7/18 Jay

Re: Batch update efficiency with composite key

2012-07-19 Thread Kirk True
In Cassandra you don't read-then-write updates, you just write the updates. Sorry for being dense, but can you clarify a logical vs. physical row? Batching is useful for reducing round trips to the server. On 07/18/2012 06:18 AM, Leonid Ilyevsky wrote: I have a question about efficiency of

Re: Errors with Cassandra 1.0.10, 1.1.0, 1.1.1-SNAPSHOT and 1.2.0-SNAPSHOT

2012-06-02 Thread Kirk True
Permissions problems on /var for the user running Cassandra? Sent from my iPhone On Jun 2, 2012, at 6:56 PM, Horacio G. de Oro hgde...@gmail.com wrote: Hi! While using Cassandra, I've seen this log messages when running some test cases (which insert lots of columns in 4 rows). I've tryied

Re: How do I add a custom comparator class to a cassandra cluster ?

2012-05-14 Thread Kirk True
Disclaimer: I've never tried, but I'd imagine you can drop a JAR containing the class(es) into the lib directory and perform a rolling restart of the nodes. On 5/14/12 11:11 AM, Ertio Lew wrote: I need to add a custom comparator to a cluster, to sort columns in a certain customized fashion.

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 amz...@gmail.com 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

Re: Stress test using Java-based stress utility

2011-07-22 Thread Kirk True
Thank You -- Kirk True Founder, Principal Engineer Expert Engineering Firepower About us:

Re: 0.8.0 thrift api?

2011-04-23 Thread Kirk Peterson
on a specific topic. cheers, -kirk On Sat, Apr 23, 2011 at 11:38 AM, Michael Fortin mi...@m410.us wrote: Hi, Were can I find the thrift api documentation for 0.8? What's in the wiki is only for =7. I'm especially inserted in the new query and counter api's. That's accessible via thrift

Re: Embedding Cassandra in Java code w/o using ports

2011-04-03 Thread Kirk Peterson
or not yet, still playing with it myself). cheers, -kirk https://github.com/tjake/Solandra On Fri, Apr 1, 2011 at 9:07 PM, Bob Futrelle bob.futre...@gmail.com wrote: Connecting via CLI to local host with a port number has never been successful for me in Snow Leopard. No amount of reading

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2011-01-27 Thread Kirk Gilmore