I think the limit of the size per row in cassandra is 2G?
1 x 1M = 10G.
Hsiao
On Mon, Aug 20, 2012 at 1:07 PM, oupfevph wrote:
> I setup cassandra with default configuration in clean AWS instance, and I
> insert 1 columns into a row, each column has a 1MB data. I use this
> ruby(versio
Thanks, I shall get onto the developer of the library :)
On Sun, Aug 19, 2012 at 10:13 PM, Peter Schuller <
peter.schul...@infidyne.com> wrote:
> You're almost certainly using a client that doesn't set TCP_NODELAY on
> the thrift TCP socket. The nagle algorithm is enabled, leading to 200
> ms la
On Aug 19, 2012 9:55 AM, "aaron morton" wrote:
>
> > Aaron Morton (aa...@thelastpickle.com) advised:
> >
> > "If possible i would avoid using PHP. The PHP story with cassandra has
> > not been great in the past. There is little love for it, so it takes a
> > while for work changes to get in the cl
I am out of the office until 08/22/2012.
I will be out of the office with no access to email on Monday and Tuesday
(8/20, 8/21). For urgent issues, please call or text 781-856-0078.
Note: This is an automated response to your message "Cassandra with large
number of columns per row" sent on
I've set NoDelay = true on the socket, and although it is much better it is
still only giving me 500 record inserts per second over a 1Gbps crossover
cable - (I now also get 200 record inserts per second over wireless.)
I would expect the cross over to have much better performance than this.
Any
Okay, thanks for the info! I was just trying to understand what I saw.
2012/8/20 Tyler Hobbs :
>
>
> On Sun, Aug 19, 2012 at 6:27 AM, Rene Kochen
> wrote:
>>
>>
>> Why does it not increase when servicing a range operation?
>
>
> It doesn't because, basically, it wasn't designed to. Range queries
IF one has 1ms delay per request and the other has .001, 1000 requests will be
a one second delay tacked on(which is huge). This is why he suggested
multi-threaded ;). Maybe there is some other factors as well.
Dean
From: Peter Morris mailto:mrpmor...@gmail.com>>
Reply-To: "user@cassandra.ap
As far as opinions go, the stack we are using is
Playframework 1.2.5 (the stateless nature rocks compared to other
platforms like tomcat or servlet container stuff).
playOrm
Astyanax
Later,
Dean
On 8/17/12 11:54 AM, "Aaron Turner" wrote:
>My stack:
>
>Java + JRuby + Rails + Torquebox
>
>I'm us
Sorry, project went through a rename and I didn't realize links changed…
https://github.com/deanhiller/playorm/blob/master/input/javasrc/com/alvazan/orm/layer9z/spi/db/cassandra/CassandraSession.java
NOTE: You can look for the trick we use to store all longs, ints, shorts as
smallest possible by
On Sun, Aug 19, 2012 at 11:04 PM, Tyler Hobbs wrote:
> On Sun, Aug 19, 2012 at 3:55 AM, aaron morton wrote:
>
>>
>>
>> It is not a judgement on the quality of PHPCassa or PDO-cassandra,
>> neither of which I have used.
>>
>> My comments were mostly informed by past issues with Thrift and PHP.
>>
We used to have a nice test cluster with 2 nodes and everything was peachy.
At some point we (re)added a third node, which seems to work allright. But then
we try to delete one CF and requery it and we get this:
root@pnscassandra03:~# cqlsh -3
[cqlsh 2.2.0 | Cassandra 1.1.2hebex1 | CQL spec 3
Robin,
RF shouldn't affect the numbers on that graph at all. The only
explanation for those differences that I can see is the increase in
the number of writes OpsCenter itself is doing. Do you see the same
jump in writes when viewing graphs just for your application's column
families?
-Nick
On S
De : mdione@orange.com [mailto:mdione@orange.com]
> We used to have a nice test cluster with 2 nodes and everything was
> peachy. At some point we (re)added a third node, which seems to work
> allright. But then we try to delete one CF and requery it and we get
> this:
Seems we've got
I'm assessing how quickly on average I can deal with a single request. I
cannot believe that connecting through a 1Gbps network cable is 14 times
slower. I think I get a higher insert rate for SQL Server.
On Mon, Aug 20, 2012 at 1:20 PM, Hiller, Dean wrote:
> IF one has 1ms delay per reques
There is latency and throughput. These are two totally different things even
for MySQL. If you are single threaded, each request (even with MySql) has to
be delayed by 1ms or whatever your ping time is. To fully utilize a 1Gps
bandwidth, you NEED to be multithreaded or you are wasting bandwid
My misunderstanding, thanks for correcting me!
On Mon, Aug 20, 2012 at 4:32 PM, Hiller, Dean wrote:
> There is latency and throughput. These are two totally different things
> even for MySQL. If you are single threaded, each request (even with MySql)
> has to be delayed by 1ms or whatever you
select * from Users where UserName='me' or EmailAddress='m...@home.com';
Bad Request: line 1:40 mismatched input 'or' expecting EOF
Could someone tell me how to use OR conditions in CQL? I am able to find
examples of AND, but none for OR and it doesn't seem to work.
Cassandra doesn't support disjunctions (OR) yet, so you'll have to do
multiple queries.
https://groups.google.com/forum/?fromgroups#!topic/phpcassa/Py42QgDHm3w%5B1-25%5D
2012/8/20 Peter Morris
> select * from Users where UserName='me' or EmailAddress='m...@home.com';
> Bad Request: line 1:40 mi
Are you inserting in bulk? Try to increase the amount of mutations you send
in a single batch, otherwise you are just measuring the TCP roundtrip time.
On 20 August 2012 17:36, Peter Morris wrote:
> My misunderstanding, thanks for correcting me!
>
>
> On Mon, Aug 20, 2012 at 4:32 PM, Hiller, Dea
Be careful on bulk as cassandra takes a bit longer to process. It was faster
not doing too many rows at a time multithreaded in our performance testing and
if I remember Aaron Morton might have told me that as well.
Definitely use the cassandra bulk testing tool as well. I used that and
compa
I have a column family that I am using for consistency purposes. Basically
a marker column is written to a row in this family before some actions take
place and is deleted only after all the actions complete. The idea is that
if something goes horribly wrong this table can be read to see what needs
The Cassandra team is pleased to announce the release of Apache Cassandra 1.1.4
This is a maintenance release; The list of changes[1] is quite small
but practice safe upgrades, and always read the release notes[2]. If
you encounter any problems, please let us know[3].
Downloads of source and bin
I want to add a secondary index to an existing column family, but am running
into some trouble. I'm trying to use the Cassandra CLI to add the secondary
index. The column family is called "books", the column I'm trying to index is
called "title", the key validation class is UTF8Type, and the def
Consider the following statements
#1 New family is created so I have no data
create columnfamily Test (UserName varchar primary key, EmailAddress
varchar);
#2 Count how many rows I have
select count(1) from Test;
-Expected: 0
-Actual: 0
#3 Select all users with a specific email address
select *
EmailAddress is not indexed, must declare key for this before can do a
search.
2012/8/20 Peter Morris
> Consider the following statements
>
> #1 New family is created so I have no data
> create columnfamily Test (UserName varchar primary key, EmailAddress
> varchar);
>
> #2 Count how many rows I
For an individual node, you can check the status of building indexes using
nodetool compactionstats. And similarly, if you want to speed up building the
indexes (and you have the extra IO) you can increase or unthrottle your
compaction throughput temporarily - nodetool setcompactionthrough 0 to
no right it's ok, it was a bug on my side
2012/8/11 Tyler Hobbs
>
>
> On Thu, Aug 9, 2012 at 10:43 AM, Cyril Auburtin
> wrote:
>
>> It seems the Thrift method *batch-mutate*, with Mutations, will not
>> update the previous data with the mutation given, but clear and replace by
>> it? right?
>>
I'm trying to write a little python script to manage our cassandra cluster.
it uses output from nodetool, for example to find the current token
assignment, node status etc.
I could do this by parsing output from "nodetool ring" command.
but is there a more "native way" , for example through some
I am running 1.1.3
Nodetool on the database node (just a single node db) is giving the error:
Failed to connect to 'localhost:7199': Connection refused
Any idea what could be causing this ?
Thanks.
My guess is "telnet localhost 7199" also fails? And if you are on linux
and run netstat -anp, you will see no one is listening on that port?
So database node did not start and bind to that port and you would see
exception in the logs of that database nodeŠ.just a guess.
Dean
On 8/20/12 4:10 PM,
Yes, the telnet does not work.
Don't know what it was but switching to 1.1.4 solved the issue.
On Mon, Aug 20, 2012 at 6:17 PM, Hiller, Dean wrote:
> My guess is "telnet localhost 7199" also fails? And if you are on linux
> and run netstat -anp, you will see no one is listening on that port?
>
>
Your best bet is probably to set up mx4j with Cassandra, which will expose
a REST api for all of the JMX stuff.
On Mon, Aug 20, 2012 at 2:46 PM, Yang wrote:
> I'm trying to write a little python script to manage our cassandra cluster.
>
> it uses output from nodetool, for example to find the cur
Thanks everyone, for the pointers. I've found an opportunity to simplify
the setup, still 2 DCs and 3 rack setup (RF = 1 for DC with 1 rack, and RF
= 2 for DC with 2 racks), but now each rack contains 9 nodes with even
token distribution.
Once I got the new topology in place, I ran multiple repai
33 matches
Mail list logo
