Re: Incr/Decr Counters in Cassandra

2010-03-13 Thread Chris Goffinet
We'll be submitting patches for vector clocks soon on jira, stay tuned. -Chris On Mar 12, 2010, at 11:21 PM, Vijay wrote: > Badly need it for my work let me know if i can do something to speed it up :) > > Regards, > > > > > On Wed, Nov 4, 2009 at 1:32 PM, Chris Goffinet wrote: > Hey, > >

Re: question about deleting from cassandra

2010-03-13 Thread Weijun Li
Tried Sylvain's feature in 0.6 beta2 (need minor change) and it worked perfectly. Without this feature, as far as you have high volume new and expired columns your life will be miserable :-) Thanks for great job Sylvain!! -Weijun On Fri, Mar 12, 2010 at 12:27 AM, Sylvain Lebresne wrote: > I gue

Re: How to force GC in Cassandra?

2010-03-13 Thread Weijun Li
Thanks Jonathan! I looked into your code and guessed that compaction is the one that cleans all deleted columns from sstable. -Weijun On Fri, Mar 12, 2010 at 12:05 PM, Jonathan Ellis wrote: > I think you mean compaction? > > You can use nodeprobe / nodetool for that. > > http://wiki.apache.org/

Re: Cassandra Demo/Tutorial Applications

2010-03-13 Thread Christopher Brind
> > > > E) How would one structure the infrastructure for the demo/tutorials ? > What > > assumptions can we make in creating them ? As AMIs to be run in EC2 ? > > I'd probably go with "virtualbox images" as being simpler for people > who don't have an AWS key already. (VB can read vmware player

Re: question about deleting from cassandra

2010-03-13 Thread Jonathan Ellis
You should submit your minor change to jira for others who might want to try it. On Sat, Mar 13, 2010 at 3:18 AM, Weijun Li wrote: > Tried Sylvain's feature in 0.6 beta2 (need minor change) and it worked > perfectly. Without this feature, as far as you have high volume new and > expired columns y

Re: About the replication strategy of Cassandra

2010-03-13 Thread Jonathan Ellis
On Sat, Mar 13, 2010 at 12:51 AM, Kauzki Aranami wrote: > 1. Please give notes the replication strategy of Cassandra is selected. Can you be more specific? > 2. About the Zab protocol adopted with Zookeeper. The weak point of > the Paxos protocol of Chubby is a delay. Is the Zab protocol more >

Re: Cassandra Demo/Tutorial Applications

2010-03-13 Thread Ronald Bradford
I collated a list of public data last year, you can check out http://ronaldbradford.com/blog/seeking-public-data-for-benchmarks-2009-08-28/ I use VirtualBox when on Mac. It's free and it's trivial to create your own images. On Sat, Mar 13, 2010 at 5:01 AM, Christopher Brind < christopher.br...@g

RE: question about deleting from cassandra

2010-03-13 Thread Weijun Li
Sure. I'm making another change for cross multiple DC replication, once this one is done (probably in next week) I'll submit them together to Jira. All based on 0.6 beta2. -Weijun -Original Message- From: Jonathan Ellis [mailto:jbel...@gmail.com] Sent: Saturday, March 13, 2010 5:36 AM To

Re: Incr/Decr Counters in Cassandra

2010-03-13 Thread Ryan Daum
I also desperately need this, and row/column TTLs. Let me know if there's anything I can do to help with the release of either in the near-term time frame. R On Sat, Mar 13, 2010 at 2:21 AM, Vijay wrote: > Badly need it for my work let me know if i can do something to speed it up > :) > > Rega

Re: question about deleting from cassandra

2010-03-13 Thread Jonathan Ellis
since they are separate changes, it's much easier to review if they are submitted separately. On 3/13/10, Weijun Li wrote: > Sure. I'm making another change for cross multiple DC replication, once this > one is done (probably in next week) I'll submit them together to Jira. All > based on 0.6 bet

Re: About the replication strategy of Cassandra

2010-03-13 Thread Kauzki Aranami
>> 1. Please give notes the replication strategy of Cassandra is selected. > > Can you be more specific? Does each replication strategy of "Rack Unaware" "Rack Aware(within a datacenter)" "Datacenter Aware" in Cassandra depend by the algorithm adopted respectively? For instance, what is the str

Re: About the replication strategy of Cassandra

2010-03-13 Thread Jonathan Ellis
On Sat, Mar 13, 2010 at 3:47 PM, Kauzki Aranami wrote: > Does each replication strategy of "Rack Unaware" "Rack Aware(within a > datacenter)" "Datacenter Aware" in Cassandra depend by the algorithm > adopted respectively? I still don't understand, sorry. > For instance, what is the strategy reco

Re: About the replication strategy of Cassandra

2010-03-13 Thread Kauzki Aranami
>> Does each replication strategy of "Rack Unaware" "Rack Aware(within a >> datacenter)" "Datacenter Aware" in Cassandra depend by the algorithm >> adopted respectively? > > I still don't understand, sorry. The description of the following document is quoted. Cassandra provides various replic