Hi Aaron
Thanks for your reply.
In you text , does the coordinator means the random client that user send
request to ?
Do you mean no matter how many W is assigned to , the data will copy on N
node ? Just the client will think this write action is successful when W
nodes are be written ?
Ps. The
You seem to be typing 0.7 commands on a 0.6 cli. Please follow the
README in the version you are using, e.g.:
set Keyspace1.Standard2['jsmith']['first'] = 'John'
On Thu, Sep 2, 2010 at 5:35 PM, Simon Chu simonchu@gmail.com wrote:
I downloaded cassendra 0.6.5 and ran it, got this error:
On Thu, Sep 2, 2010 at 8:19 PM, Ying Tang ivytang0...@gmail.com wrote:
Recently , i read the paper about Cassandra again .
And now i have some concepts about the reading and writing .
We all know Cassandra uses NWR ,
When read :
the request --- a random node in Cassandra .This node acts as a
In dynamo's paper ,it says:
Each key, k, is assigned to a coordinator node .
The coordinator is in charge of the replication of the data items that fall
within its range.
On Fri, Sep 3, 2010 at 2:56 PM, Benjamin Black b...@b3k.us wrote:
On Thu, Sep 2, 2010 at 8:19 PM, Ying Tang
Very interesting. Thank you
So it sounds like other than being able to quickly truncate
customer-keyspaces, with Cassandra there's no real benefit in keeping
each customer data in a separate keyspace.
We'll suffer on the memory side with all the switching between keyspaces
and we're better
A few of us working on a book for casanadra and got to the point where we (well
I did anyway) wanted to include an example of a non trivial inverted index.
I've been playing around with different ideas on how I could store the data
and I've had a look at the previous threads that touched on
If I am correct than you need to restart cassandra whenever you adding a new
KeySpace. Thats another concern.
Vineet Daniel
Cell : +91-8106217121
Websites :
Blog http://vinetedaniel.blogspot.com |
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| Twitter
We're using 0.7
On 9/3/2010 6:48 AM, vineet daniel wrote:
If I am correct than you need to restart cassandra whenever you adding
a new KeySpace. Thats another concern.
Vineet Daniel
Cell : +91-8106217121
Websites :
Blog http://vinetedaniel.blogspot.com | Linkedin
Hi Courtney,
You can take a look at lucandra http://github.com/tjake/Lucandra which uses
the lucene api to maintain a inverted index in cassandra. There are a couple
articles and presentations in the readme that give more info on how this is
done.
-Jake
On Fri, Sep 3, 2010 at 6:26 AM, Courtney
Hi,
I'm performing tests with Cassandra 0.6.5 with Hector 0.6.0-14 on a
single machine (one node cluster). I've noticed an issue with consistency.
In my tests I perform a KeySpace.batchMutate() to update a column and
immediately after that I perform a KeySpace.getSlice() on the same
column
Which ConsistencyLevels did you use for your batchMutate() and getSlice()
operations?
ConsistencyLevels directly dictate the level of consistency you will get
with your data.
Regards,
Nick Telford
On 3 September 2010 12:03, Hugo h...@unitedgames.com wrote:
Hi,
I'm performing tests with
I'm using QUORUM, but in my single-node setup this doesn't matter IMHO.
On 9/3/2010 1:51 PM, Nick Telford wrote:
Which ConsistencyLevels did you use for your batchMutate() and
getSlice() operations?
ConsistencyLevels directly dictate the level of consistency you will
get with your data.
Are you using QUORUM for both writes and reads?
The behaviour you're seeing sounds like something I'd expect to see if you
used NONE for writes.
On 3 September 2010 14:12, Hugo h...@unitedgames.com wrote:
I'm using QUORUM, but in my single-node setup this doesn't matter IMHO.
On 9/3/2010
Hi,
We're not setting cache capacity upon creation of Column Family, since the type
and capacity is unknown at that time. By default it = 0.
After Column Family has enough data and we could decide on cache type (Row or
Key) and capacity, we connect with JConsole and set cache capacity manually
I'm using the Hector defaults, which are QUORUM for reads and writes.
On 9/3/2010 3:18 PM, Nick Telford wrote:
Are you using QUORUM for both writes and reads?
The behaviour you're seeing sounds like something I'd expect to see if
you used NONE for writes.
On 3 September 2010 14:12, Hugo
On Fri, Sep 3, 2010 at 9:22 AM, Viktor Jevdokimov
viktor.jevdoki...@adform.com wrote:
Hi,
We’re not setting cache capacity upon creation of Column Family, since the
type and capacity is unknown at that time. By default it = 0.
After Column Family has enough data and we could decide on
To the degree that this suggests that there is a master node for
each range, IMO it is a bug in the paper. (There are several of
these.) Certainly there are no master nodes in Cassandra.
On Fri, Sep 3, 2010 at 12:02 AM, Ying Tang ivytang0...@gmail.com wrote:
In dynamo's paper ,it says:
Each
Forgot to mention the version: 0.7 beta 1
-Original Message-
From: Edward Capriolo [mailto:edlinuxg...@gmail.com]
Sent: Friday, September 03, 2010 4:59 PM
To: user@cassandra.apache.org
Subject: Re: Cache capacity set with JConsole is lost after restart
On Fri, Sep 3, 2010 at 9:22 AM,
That doesn't matter, the config file is the Source Of Truth for the
values it has.
On Fri, Sep 3, 2010 at 7:12 AM, Viktor Jevdokimov
viktor.jevdoki...@adform.com wrote:
Forgot to mention the version: 0.7 beta 1
-Original Message-
From: Edward Capriolo [mailto:edlinuxg...@gmail.com]
It's supposed to work, but it's definitely a rare thing to do.
You should be concerned about other nodes rejecting the new node
saying remember this token? i'm at ip Y now instead of Z. if that
happens then shutting down all nodes and restarting will fix it.
On Thu, Sep 2, 2010 at 3:03 PM, Ned
I have been able to reproduce this, although it was a bug in
application client code. If you keep a thrift client around longer
after it has had an exception, it may generate this error.
In my case, I was holding a reference via ThreadLocal to a stale
storage object.
Another symptom which may
But the config file doesn't hold those values anymore with 0.7.
There is a JIRA ticket out there for api's to modify stuff about column
families in 0.7, it may cover doing this. I would guess that the tracking
tables in the system keyspace aren't being updated with the values you are
setting
Right, in 0.7 the system calls for modifying these are the source of
truth. See https://issues.apache.org/jira/browse/CASSANDRA-1285
On Fri, Sep 3, 2010 at 11:17 AM, Jeremiah Jordan
jeremiah.jor...@morningstar.com wrote:
But the config file doesn't hold those values anymore with 0.7.
There is
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