Hello,
Thank you for your addressing.
But I consider LIMIT to be a keyword to limits result numbers from WHOLE
results retrieved by the SELECT statement.
The result with SELECT.. LIMIT is below. Unfortunately, This is not what I
wanted.
I wante latest posts of each authors. (Now I doubt if CQL3
Can you share your schema and the commands you are running?
On Thu, May 15, 2014 at 7:54 PM, mahesh rajamani
wrote:
> Hi,
>
> I am using Cassandra 2.0.5 version. I trying to setup 2 keyspace with same
> tables for different testing. While creating index on the tables, I
> realized I am not able
"A related question is whether it is a good idea to denormalize on
read-heavy part of data while normalize on other less frequently-accessed
data?"
Heavy read -> denormalize
Less frequently accessed data -> it depends how "less frequent" it is and
whether it's complicated to denormalize in your
Clearly with your current data model, having X latest post for each author
is not possible.
However, what's about this ?
CREATE TABLE latest_posts_per_user (
author ascii
latest_post map,
PRIMARY KEY (author)
)
The latest_post will keep a collection of X latest posts for each user.
No
if you look at the new committers since 2012 they are mostly datastax
On Fri, May 16, 2014 at 9:14 PM, Kevin Burton wrote:
> so 30%… according to that data.
>
>
> On Thu, May 15, 2014 at 4:59 PM, Michael Shuler wrote:
>
>> On 05/14/2014 03:39 PM, Kevin Burton wrote:
>>
>>> I'm curious what % of
Hmm. Something like a user-managed-index looks the only way to do what I
want to do.
Thank you, I'll try that.
2014-05-17 18:07 GMT+09:00 DuyHai Doan :
> Clearly with your current data model, having X latest post for each author
> is not possible.
>
> However, what's about this ?
>
> CREATE TAB
The question assumes that it's likely that datastax employees become
committers.
Actually, it's more likely that committers become datastax employees.
So this underlying tone that datastax only really 'wants' datastax
employees to be cassandra committers, is really misleading.
Why wouldn't a
Thanks for the thoughts!
On May 16, 2014 4:23 PM, Ariel Weisberg wrote:
Hi,
Recommending nobarrier (mount option barrier=0) when you don't know if a
non-volatile cache in play is probably not the way to go. A non-volatile cache
will typically ignore write barriers if a given block device is co
Thanks!
How could I find leveled json manifest?
--
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Sent from the cassandra-u...@incubator.apache.org mailing list archive at
Nabble.com.
I would note that the original question was about “developers”, not
“committers” per se. I sort of assumed that the question implied the latter,
but that’s not necessarily true. One can “develop” and optionally “contribute”
code without being a committer, per se. There are probably plenty of use
Hi Dimetrio,
>From the wiki:
Since 0.6.8, minor compactions also GC tombstones
Regards
Andi
Dimetrio wrote
Does cassandra delete tombstones during simple LCS compaction or I should use
node tool repair?
Thanks.
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I was thinking to use counter type a separate pin counter table and, when I
need to update the like count, I would use read-after-write to get the
current value and timestamp and then denormalize into pin's detail table and
board tables.
Is it a viable solution in this case?
Thanks
--
View th
Hey all,
I've set my initial_token in cassandra 2.0.7 using a python script I found
at the datastax wiki.
I've set the value like this:
initial_token: 85070591730234615865843651857942052864
And cassandra crashes when I try to start it:
[root@beta:/etc/alternatives/cassandrahome] #./bin/cassan
In our MySQL stack we've been using a fluent interface for Java I developed
about five years ago but never open sourced.
It's similar to:
MSelect sele = MSelect.newInstance();
sele.addTable( Foo.NAME )
.addWhereIsEqual( Foo.COL_A, "bar" )
.setLimit( 10 )
;
… of course embedding CQL
You may have used the old random partitioner token generator. Use the murmur
partitioner token generator instead.
--
Colin
320-221-9531
> On May 17, 2014, at 1:15 PM, Tim Dunphy wrote:
>
> Hey all,
>
> I've set my initial_token in cassandra 2.0.7 using a python script I found
> at the dat
AH… looks like there's one in the Datastax java driver. Looks like it
doesn't support everything but probably supports the features I need ;)
So I'll just use that!
On Sat, May 17, 2014 at 12:39 PM, Kevin Burton wrote:
> In our MySQL stack we've been using a fluent interface for Java I
> deve
Hi and thanks for your response.
The puzzling thing is that yes I am using the murmur partition, yet I am
still getting the error I just told you guys about:
[root@beta:/etc/alternatives/cassandrahome] #grep -i partition
conf/cassandra.yaml | grep -v '#'
partitioner: org.apache.cassandra.dht.Murm
Pull requests encouraged. :)
-Tupshin
On May 17, 2014 7:43 PM, "Kevin Burton" wrote:
> AH… looks like there's one in the Datastax java driver. Looks like it
> doesn't support everything but probably supports the features I need ;)
>
> So I'll just use that!
>
>
> On Sat, May 17, 2014 at 12:39 P
You probably generated the wrong token type. Look for a murmur token
generator on the Datastax site.
--
Colin
320-221-9531
On May 17, 2014, at 7:00 PM, Tim Dunphy wrote:
Hi and thanks for your response.
The puzzling thing is that yes I am using the murmur partition, yet I am
still getting th
What Colin is saying is that the tool you used to create the token, is
not creating tokens usable for the Murmur3Partitioner. That tool is
probably generating tokens for the (original) RandomPartitioner, which
has a different range.
On 05/17/2014 07:20 PM, Tim Dunphy wrote:
Hi and thanks for
>
> You probably generated the wrong token type. Look for a murmur token
> generator on the Datastax site.
What Colin is saying is that the tool you used to create the token, is not
> creating tokens usable for the Murmur3Partitioner. That tool is probably
> generating tokens for the (original) R
So I see that Cassandra doesn't support bmdiff/vcdiff.
Is this primarily because most people aren't using the ordered partitioner?
bmdiff gets good compression by storing similar content next to each page
on disk. So lots of HTML content would compress well.
but if everything is being stored a
Cassandra offers compression out of the box. Look into the options available
upon table creation.
The use of orderedpartitioner is an anti-pattern 999/1000 times. It creates
hot spots - the use of wide rows can often accomplish the same result through
the use of clustering columns.
--
Colin
Looks like you may have put the token next to num-tokens property in the
yaml file for one node. I would double check the yaml's to make sure the
tokens are setup correctly and that the ip addresses are associated with
the right entries as well.
Compare them to a fresh download if possible to see
Hey Colin,
Looks like you may have put the token next to num-tokens property in the
> yaml file for one node. I would double check the yaml's to make sure the
> tokens are setup correctly and that the ip addresses are associated with
> the right entries as well.
> Compare them to a fresh download
"compression" … sure.. but bmdiff? Not that I can find. BMDiff is an
algorithm that in some situations could result in 10x compression due
to the way it's able to find long commons runs. This is a pathological
case though. But if you were to copy the US constitution into itself
… 10x… bm
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