Hi,
we sorted out the performance problems and tuned the cluster. In
particular, we identified the following weak spot in our setup:
ConcurrentReads and ConcurrentWrites was set to the default values
which were much too low for our setup. Now, we get some serious
numbers.
Thanks,
Markus
On
Hm, phpcassa works great, I guess that is the problem of cli. Now it doesn't
return any rows at all.
2011/2/18 Rauan Maemirov ra...@maemirov.com
With this schema:
create column family Userstream with comparator=UTF8Type and rows_cached =
1 and keys_cached = 10
and
HI Sasha,
That was me that was going to try and put something on the wiki and I
completely forgot about it.
I'm tied up this weekend but I will endeavor to ping you an example asap.
Jason
On Fri, Feb 18, 2011 at 10:39 PM, Sasha Dolgy sdo...@gmail.com wrote:
hi,
does anyone have an erlang
Hi Joshua,
I can't speak for Sasha, but in my case I use both Riak and Cassandra since
cassandra has ranges and build in secondary indexes whereas Riak does not.
Actually I use others too as the different ones bring different qualities to
the table.
JT
On Sat, Feb 19, 2011 at 7:18 AM, Joshua
Is there a way to just ask for column names in a row to get just a
column names list (and not the entire columnString,String). I am
using Hector.
I have a row of valueless columns (whose column names are keys to
another set of rows) I wish to retrieve a list of those column names
and send it in
Hi,
Would you like to share you use both database? Does this mean you have
the same data in both database?
Thanks for sharing.
Kind regards,
Joshua.
On Sun, Feb 20, 2011 at 12:41 AM, J T jt4websi...@googlemail.com wrote:
Hi Joshua,
I can't speak for Sasha, but in my case I use both Riak and
Hi, with the help of twissandra example, I tried to create a scheme for
activity feed.
Activities cf stores all activities:
Activities: {
'4d5fbfdf47878': {
'user': 'larry',
'activity_type': 'comment',
...
activity info
}
}
And userfeed cf stores each user's feed sorted by
Hi,
I am testing 0.7.2 on a Windows 2003 x64 system(one node) and I am
having the following problem.
My insertion speed is relatively slow, so the memtables do not get full
and the actual flushing is triggered by memtable_flush_after_mins, this
happens on the hour mark. My problem with 0.7.2
Maybe you can try this: use MAX-time as your column name, then get the first
limit columns.
-邮件原件-
发件人: Benson Margulies [mailto:bimargul...@gmail.com]
发送时间: 2011年2月19日 2:11
收件人: user@cassandra.apache.org
主题: managing a limited-length list as a value
The following is derived from the
Hello
I experiment with cassandra on vmvare. My work machine have 512M of memory
if have enable jna for cassandra 0.7.2, and right after startup on clear
enviroment cassandra took more then 90% of memory:
root@cassandra1:/usr/local/apache-cassandra-0.7.2/bin# ps uax
root 2404 10.5 91.7
Flush code didn't change between 0.7.0 and 0.7.2. There must be some
other variable here. Memory pressure maybe?
On Sat, Feb 19, 2011 at 8:16 AM, Ivan Georgiev yngw...@bk.ru wrote:
Hi,
I am testing 0.7.2 on a Windows 2003 x64 system(one node) and I am having
the following problem.
My
conf/cassandra-env.sh, reduce the heap size
On Sat, Feb 19, 2011 at 8:37 AM, ruslan usifov ruslan.usi...@gmail.com wrote:
Hello
I experiment with cassandra on vmvare. My work machine have 512M of memory
if have enable jna for cassandra 0.7.2, and right after startup on clear
enviroment
If your question is why are some of the values in hex, it's because
you didn't specify a validation_class on the other columns.
On Fri, Feb 18, 2011 at 6:46 AM, Rauan Maemirov ra...@maemirov.com wrote:
With this schema:
create column family Userstream with comparator=UTF8Type and rows_cached =
On 19.2.2011 г. 16:43 ч., Jonathan Ellis wrote:
Flush code didn't change between 0.7.0 and 0.7.2. There must be some
other variable here. Memory pressure maybe?
Cloud you please elaborate on that one ?
The conditions are exactly the same for the test with 0.7.0 and 0.7.2.
By the way, 0.7.1
Are you running with JNA enabled? If so could you try disabling it?
On Sat, Feb 19, 2011 at 11:32 AM, Ivan Georgiev yngw...@bk.ru wrote:
On 19.2.2011 г. 16:43 ч., Jonathan Ellis wrote:
Flush code didn't change between 0.7.0 and 0.7.2. There must be some
other variable here. Memory pressure
JNA is disabled and it is a windows box.
Ivan
On 19.2.2011 г. 19:23 ч., Jake Luciani wrote:
Are you running with JNA enabled? If so could you try disabling it?
On Sat, Feb 19, 2011 at 11:32 AM, Ivan Georgiev yngw...@bk.ru
mailto:yngw...@bk.ru wrote:
On 19.2.2011 г. 16:43 ч., Jonathan
Can you share what numbers you are now getting?
-Original Message-
From: markuskl...@gmail.com [mailto:markuskl...@gmail.com] On Behalf Of Markus
Klems
Sent: Saturday, February 19, 2011 10:53 AM
To: user@cassandra.apache.org
Subject: Re: Benchmarking Cassandra with YCSB
Hi,
we sorted
Sure will do. We are currently running a couple of benchmarks on
differently configured EC2 landscapes. We will share our results in
the next weeks.
On Sat, Feb 19, 2011 at 6:53 PM, Lior Golan lio...@taboola.com wrote:
Can you share what numbers you are now getting?
-Original Message-
Well I can't go in to too much detail I'm afraid but yes, in some cases
there is duplication of data across the different database engines but then
thats 'ok' in this new NOSQL world.
On Sat, Feb 19, 2011 at 2:01 PM, Joshua Partogi joshua.j...@gmail.comwrote:
Hi,
Would you like to share you
anyone who can share what is the most recommended way of doing this
On Sat, Feb 19, 2011 at 7:12 PM, Aklin_81 asdk...@gmail.com wrote:
Is there a way to just ask for column names in a row to get just a
column names list (and not the entire columnString,String). I am
using Hector.
I have a
Hi Sasha,
Below is some code from an old module I was working with a while back.
It should give you an idea of the direction to go but really if you look at
the files generated by thrift for cassandra it should help as well:
* cassandra_thrift.erl
* cassandra_thrift.hrl
* cassandra_types.erl
Hello
I am trying to run cassandra v0.7.2 on ubuntu 10.04.
Cassandra works but in cassandra-cli any command such as help does not respond.
$ ./cassandra -f
INFO 10:08:43,618 Logging initialized
INFO 10:08:43,634 Heap size: 1534066688/1535115264
INFO 10:08:43,648 JNA not found. Native methods
Add a semicolon.
On Feb 19, 2011 7:11 PM, 橋本誠 tokomakoma...@auone.jp wrote:
Hello
I am trying to run cassandra v0.7.2 on ubuntu 10.04.
Cassandra works but in cassandra-cli any command such as help does not
respond.
$ ./cassandra -f
INFO 10:08:43,618 Logging initialized
INFO 10:08:43,634 Heap
you need to append a ; at the end of your command.
On Sun, 2011-02-20 at 10:10 +0900, 橋本誠 wrote:
Hello
I am trying to run cassandra v0.7.2 on ubuntu 10.04.
Cassandra works but in cassandra-cli any command such as help does not
respond.
$ ./cassandra -f
INFO 10:08:43,618 Logging
I guess you'll need to binary search through the 0.7.1 changes to find
what made the difference. I can't think of any obvious candidates.
On Sat, Feb 19, 2011 at 10:32 AM, Ivan Georgiev yngw...@bk.ru wrote:
On 19.2.2011 г. 16:43 ч., Jonathan Ellis wrote:
Flush code didn't change between 0.7.0
Is it possible that the changes to the BufferedRandomAccessFile.java
could be causing the issue ?
I think the most notable change there is using ByteBuffer instead of a
byte[] for the buffer.
I will run more tests and see what comes out of it.
Ivan
On 20.2.2011 г. 05:03 ч., Jonathan Ellis
Hello Brandon and Tan,
Thank you for giving me the resolution.
I am a Cassandra 0.6 and cassandra-cli commands works without semi-colon.
Now I know the difference between 0.6 and 0.7.
Regards,
MH
Try Jedis or better-still JOhm if you would like to have automatic object
mapping to Redis. You can select a connection pool of your choice even
though we recommend you use Apache Commons Pool.
Cassandra and Redis are very different beasts and work best at their
respective scales. If you just
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