in addition, if you don't know how many rows will be needed - in each row,
you can store the key of the next one.
Just like in a linked list.
OR
have 1 row that will hold all the keys that combining your other rows.
1st select the main row (with the keys), then select the other rows.
On Mon, J
You can use Watchitoo.com (LIke GoToMeeting/WebEX) to host an event.
using that tool, everyone around the world can join and take action.
the great thing about is that it's FREE!
On Wed, Jul 6, 2011 at 10:25 PM, Mike Rapuano wrote:
> Hi all
>
> Are there any active cassandra meet ups in souther
Can you please Watchitoo.com (its' free) and broadcast the event?
On Fri, Jul 8, 2011 at 8:54 PM, Richard Low wrote:
> Hi all,
>
> If you're in San Francisco for CassandraSF on Monday 11th, then come
> and join fellow Cassandra users and committers on Sunday evening.
> Starting at 6:30pm at Thir
Hi,
I have few questions:
*Secondary index*
1. Is there a limit on the number of columns in a single column family
that serve as secondary indexes?
2. Does performance decrease (significantly) if the uniqueness of the
column’s values is high?
*Twissandra*
1. Why in the source (o
rations have
> to pay a constant cost to decode the row level column index, this can be
> tuned though. AFAIK the comparator type has very little to do with the
> performance.
>
> Hope that helps.
>
> -
> -
> Aaron Morton
> Freelance Cassand
> http://thelastpickle.com/2011/07/04/Cassandra-Query-Plans/
>
> Cheers
>
>
> -
> Aaron Morton
> Freelance Cassandra Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 10 Jul 2011, at 00:14, Eldad Yamin wrote:
>
> Aaron - Thank you for
Hello,
Is there any good way of storing a binary-tree in Cassandra?
I wonder if someone already implement something like that and how
accomplished that without transaction supports (while the tree keep
evolving)?
I'm asking that becouse I want to save geospatial-data, and SimpleGeo did it
using b-
t;
> Im not sure if I have an answer for you, anyway, but I'm curious
>
> A b-tree and a binary tree are not the same thing. A binary tree is a
> basic fundamental data structure, A b-tree is an approach to storing and
> indexing data on disc for a database.
>
> Whi
y tree are not the same thing. A binary tree is a
> basic fundamental data structure, A b-tree is an approach to storing and
> indexing data on disc for a database.
>
> Which do you mean?
>
>
> On Wed, Jul 20, 2011 at 4:30 PM, Eldad Yamin wrote:
>
>> Hello,
>>
I wonder if it wont make problems...
Anyine did it already?
On Jul 21, 2011 10:39 PM, "Jonathan Ellis" wrote:
> dsh -c -g cassandra /etc/init.d/cassandra stop
>
> http://www.netfort.gr.jp/~dancer/software/dsh.html.en
>
> P.S. mostly people are concerned about making sure their entire
> cluster do
orton
> http://www.thelastpickle.com
>
> On 22 Jul 2011, at 00:06, Eldad Yamin wrote:
>
>> Aaron,
>> Nested set is exactly what I had in mind.
>> But how will you be able to maintain it while it evolves and new data is
added without transactions?
>>
>> Thanks!
Hi,
Let’s say that I have 2 datacenters, a key is changed on both of my
datacenters in the exact same time (even in 1-2 seconds diff).
Datacenter #1 remove a column and Datacenter #2 add 2 new columns.
Is there any problem with consistency or Cassandra will handle this
situation easily.
Thanks
any different if the changes will be made withing the same data
center?
Thanks!
Eldad Yamin
Hello,
I wonder if I can select a column or all columns that start with X.
E.g I have columns ABC_1, ABC_2, ZZZ_1 and I want to select all columns that
start with ABC_ - is that possible?
Thanks!
Is consistency level "All" for write actually grenty that my data is updated
in all of my node?
is it apply to read actions as-well?
I've read it on the wiki, I just want to make sure.
Thanks!
Hello,
I'm trying to save geo-data in Cassandra,
according to SimpleGeo they did that using nested tree:
http://www.readwriteweb.com/cloud/2011/02/video-simplegeo-cassandra.php
I wonder if someone already implement something like that and how he
accomplished that without transaction supports (whi
CL ONE reads are also sent to all UP replicas.
>
> Hope that helps.
>
> -
> Aaron Morton
> Freelance Cassandra Developer
> @aaronmorton
> http://www.thelastpickle.com
>
> On 3 Aug 2011, at 09:32, Eldad Yamin wrote:
>
> > Is consistency level "All&
with column_start="ABC_" , count to whatever, and column_finish not
>>> provided.
>>>
>>> You can also provide a finish and use the highest encoded character, e.g.
>>> ascii 126 is ~ so if you used column_finish = "ABC_~" you would get
>>> everything that starts wit
Hi,
Is there any manual or important notes I should know before I try to install
Cassandra on EC2?
Thanks!
change what
> folders are pointed to what drives (not sure if you can or not...I'm sure
> you could), or change the yaml file to point the /mnt folder.
>
>
> On Wed, Aug 3, 2011 at 6:28 AM, Eldad Yamin wrote:
>
>> Hi,
>> Is there any manual or important
Hi,
I'd like to get tutorials on how to install Cassandra and Solandra - I
couldn't find anything helpful.
In addition, how to use (index/search) Solandra tutorials will be great.
Thanks!
Hi,
I'm trying to install Cassandra on Amazon EC2 without success, this is what
I did:
1. Created new "Small" EC2 instance (this is just for testing), running
Ubuntu OS - custom AIM (ami-596f3c1c) from:
http://uec-images.ubuntu.com/releases/11.04/release/
2. Installed Java:
# sudo a
> On Wed, Aug 3, 2011 at 10:44 AM, Eldad Yamin wrote:
> > Hi,
> > I'm trying to install Cassandra on Amazon EC2 without success, this is
> what
> > I did:
> >
> > Created new "Small" EC2 instance (this is just for testing), running
>
Thanks! I missed that lol!
BTW, how do I compile it?
Thanks!
On Wed, Aug 3, 2011 at 6:51 PM, samal wrote:
> did u compile source code? :)
> you have downloaded source code not binary.
>
> try with binary.
>
> On Wed, Aug 3, 2011 at 9:14 PM, Eldad Yamin wrote:
>
>> H
Hello,
I have a cluster of 3 Cassandra nodes and I would like to start using
Solandra.
1. How can I install Solandra and make use the existing nodes?
2. Will it be better to install Solandra on a new node and add it to the
existing cluster?
3. How Solandra index, does it operate automatically or I
Great! I hope it will be open soon!
On Wed, Aug 3, 2011 at 10:33 PM, Ed Anuff wrote:
> Awesome, great news!
>
>
> On Wed, Aug 3, 2011 at 11:53 AM, Lynn Bender wrote:
>
>> Greetings all,
>>
>> I just wanted to send a note out to let everyone know about Planet
>> Cassandra -- an aggregation site
uster (we need a second virtual DC for analytics), you'll probably
> want to use the property file snitch. there's a cross region ec2snitch
> that's coming in 1.0.
>
> would probably be good to add some ec2 specific tips in the wiki. the page
> that dave mentioned is a go
gt;>
>> On Thu, Aug 4, 2011 at 1:56 PM, Eldad Yamin wrote:
>>
>>> Great! I hope it will be open soon!
>>>
>>>
>>> On Wed, Aug 3, 2011 at 10:33 PM, Ed Anuff wrote:
>>>
>>>> Awesome, great news!
>>>>
>>>>
&g
which did not have a
> relevant subject, sorry for the spamming)
>
> Hi Eldad / All,
>
> On Wed, Aug 10, 2011 at 8:32 AM, Eldad Yamin wrote:
>
> Can you please explain how did you upgraded. something like step-by-step.
>
> Thanks!
>
>
> I took the liberty of rep
HI Dave,
unfortunately, me and some guys that are very interesting won't be able to
get all the way to London.
Can you please consider using a video streaming service?
I recommend on using Watchitoo.com (I used to work there)
At the moment its free.
Thanks!
On Tue, Aug 16, 2011 at 12:47 PM, Dave
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