cassandra-java-client is up to cassandra's 0.4.2 version, so you probably
can't use it out of the box.
Hector is active and up to the latest 0.6.1 release with a bunch of
committers, contributors and users. See
http://wiki.github.com/rantav/hector/ and
http://groups.google.com/group/hector-users
A good chance to introduce my http://code.google.com/p/jassandra/
J
Another Java client, and well, it cannot be found with Cassandra java client
keywords. K
From: Ran Tavory [mailto:ran...@gmail.com]
Sent: Tuesday, May 25, 2010 2:52 PM
To: user@cassandra.apache.org
Subject: Re:
Hi Cao,
Thanks for your response.
actually am using ReplicationFactor = 1.
Thanks,
Sharan
2010/5/25 casablinca126.com casabli...@126.com
hi Sharan,
what's the replication factor are you using ?
regards,
Cao Jiguang
2010-05-25
--
casablinca126.com
Could you please tell me why?
There might be pending sstable removals on disk, which won't happen
until GC or restart. If you just did a bulk insert and checked
diskspace immediately afterwards, I think this is a possible
explanation.
(See Write path on
Hi Peter,
Thanks a lot.
Regards,
Sharan
2010/5/25 Peter Schüller sc...@spotify.com
Could you please tell me why?
There might be pending sstable removals on disk, which won't happen
until GC or restart. If you just did a bulk insert and checked
diskspace immediately afterwards, I think
It seems there's an error reporting the Key cache hit rate. The value is
always 0.0 and I have a feeling it's incorrect. This is seen both by using
notetool cfstats as well as accessing JMX directly
(org.apache.cassandra.db:type=Caches,keyspace=outbrain_kvdb,cache=KvAdsKeyCache
RecentHitRate)
Hi All,
Could u please give configuration settings for single node(Windows
machine), so that it must be time and space efficient.
Thanks,
Sharan
I'm fairly certain the write path hits the commit log first, then the
memtable.
2010/5/25 Peter Schüller sc...@spotify.com
I have seen several off-hand mentions that writes are inherently faster
than
reads. Why is this so?
I believe the primary factor people are referring to is that
I'm fairly certain the write path hits the commit log first, then the
memtable.
I didn't mean to imply an ordering between the two (I probably should
not have said memtable plus commit log...), and yes I believe so.
--
/ Peter Schuller aka scode
What happens if you disable row cache?
On Tue, May 25, 2010 at 4:53 AM, Ran Tavory ran...@gmail.com wrote:
It seems there's an error reporting the Key cache hit rate. The value is
always 0.0 and I have a feeling it's incorrect. This is seen both by using
notetool cfstats as well as accessing
Turns out this is a bug in the version of MoinMoin the ASF has
installed. There's nothing we can do until the infrastructure team
upgrades: https://issues.apache.org/jira/browse/INFRA-2741
On Sun, May 23, 2010 at 10:09 PM, Yuki Morishita mor.y...@gmail.com wrote:
Hi all,
I'm currently working
On Mon, May 24, 2010 at 4:53 PM, Jonathan Ellis jbel...@gmail.com wrote:
(a) cassandra does not use update-in-place storage so doing the update
as part of the get call isn't much of an efficiency gain
If you could issue an update type of command, any other data needed
for the new copy of the
My guess is that it is using object equality to compare. One thing to
test would be to create two KeySlices whose contents had the same
values, add them to separate lists, and then compare the lists. I
think you'll find that they are not 'equivalent'.
On May 25, 2010, at 10:00 AM,
Do anyone know if there are repositories for high-scale-lib clhm-production
jars? Is the source available somewhere?
Thanks
Carlos
This email message and any attachments are for the sole use of the intended
recipients and may contain proprietary and/or confidential information which
may be
High-scale-lib: http://sourceforge.net/projects/high-scale-lib/
CLHM: http://code.google.com/p/concurrentlinkedhashmap/
On Tue, May 25, 2010 at 10:17 AM, Carlos Sanchez
carlos.sanc...@riskmetrics.com wrote:
Do anyone know if there are repositories for high-scale-lib
clhm-production jars? Is
Hi everyone,
So we have Panasas (http://www.panasas.com), and want to avoid local drives.
Because panasas has its own redundancy and cache, Can I set RF=1? If so,
can you think of any reason why we shouldn¹t use panasas?
Thanks in advance
Fernie¹
Thanks a lot
From: Tobias Jungen [mailto:tobias.jun...@gmail.com]
Sent: Tuesday, May 25, 2010 10:56 AM
To: user@cassandra.apache.org
Subject: Re: high-scale-lib clhm-production jars
High-scale-lib: http://sourceforge.net/projects/high-scale-lib/
CLHM:
On Tue, May 25, 2010 at 4:04 AM, Mark Greene green...@gmail.com wrote:
I'm fairly certain the write path hits the commit log first, then the
memtable.
True, but that does not make them any less sequential -- journal logs
are strictly sequential fast writes. Actual ordering occurs in memory,
and
On Tue, May 25, 2010 at 9:06 AM, Fernanda Foertter
fernanda.foert...@pic.com wrote:
Hi everyone,
So we have Panasas (http://www.panasas.com), and want to avoid local drives.
Because panasas has its own redundancy and cache, Can I set RF=1? If so,
can you think of any reason why we shouldn’t
Also, timestamps for each column.
-ryan
On Tue, May 25, 2010 at 5:41 AM, Jonathan Ellis jbel...@gmail.com wrote:
That's true. But fundamentally Cassandra is expected to use more
space than mysql for a few reasons; usually the biggest factor is that
Cassandra has to write out each column name
https://issues.apache.org/jira/browse/CASSANDRA-1129
On Tue, May 25, 2010 at 3:42 PM, Jonathan Ellis jbel...@gmail.com wrote:
That does look like a bug. Can you create a ticket and upload a
(preferably small-ish) sstable that illustrates the problem?
On Mon, May 24, 2010 at 12:07 PM, Ran
My money is on the fact that the serializer is just horribly verbose. It's
using a basic set of the java serializer.
-Chris
On Tue, May 25, 2010 at 10:02 AM, Ryan King r...@twitter.com wrote:
Also, timestamps for each column.
-ryan
On Tue, May 25, 2010 at 5:41 AM, Jonathan Ellis
Hi Jeremy,
Why are you using Cassandra versus using data stored in HDFS or HBase?
- I'm thinking of using it for realtime streaming of user data. While
streaming the requests, I'm also using Lucandra for indexing the data in
realtime. It's a better option when you compare it with HBase or the
the only place we use a java serializer is for the BitSet in bloom filters.
On Tue, May 25, 2010 at 12:37 PM, Chris Goffinet goffi...@digg.com wrote:
My money is on the fact that the serializer is just horribly verbose. It's
using a basic set of the java serializer.
-Chris
On Tue, May 25,
Two reasons:
Do a single node test of large file read/write without having to purchase
additional hard rives at the moment.
Benefit from I/O Panasas delivers that I can't get from local drives...
Keeping the data local, for easier loading.
On 5/25/10 11:58 AM, Ryan King r...@twitter.com
On 2010-05-25, Jonathan Ellis jbel...@gmail.com wrote:
That's true. But fundamentally Cassandra is expected to use more
space than mysql for a few reasons; usually the biggest factor is that
Cassandra has to write out each column name in each row, since column
names are dynamic unlike in
Hi, Where can I find Hector code samples?
http://wiki.github.com/rantav/hector/examples
On May 25, 2010 10:43 PM, Asaf Lahav asaf.la...@gmail.com wrote:
Hi, Where can I find Hector code samples?
Hello
I've used jassandra, works fine and easy for use.
On 25.05.2010 06:21, Peter Hsu wrote:
Hi All,
This may have been answered already, but I did a [quick] Google search and
didn't find much. Which is the better Java client to use? Hector or
cassandra-java-client or neither?
it seems
Are there examples of inserting multiple cols into a CF anywhere?
Bill
Ran Tavory wrote:
http://wiki.github.com/rantav/hector/examples
On May 25, 2010 10:43 PM, Asaf Lahav asaf.la...@gmail.com
mailto:asaf.la...@gmail.com wrote:
Hi, Where can I find Hector code samples?
Hi,
I just noticed I have lots of these messages
INFO [GMFD:1] 2010-05-25 23:21:04,070 GossipDigestSynMessage.java (line 152)
Remaining bytes zero. Stopping deserialization in EndPointState.
INFO [GMFD:1] 2010-05-25 23:21:05,224 GossipDigestSynMessage.java (line 129)
Breaking out to
I have a question on using Order Preserving Partitioner.
Many rowKeys in my system will be related to dates, so it seems natural to
use Order Preserving Partitioner instead of the default Random Partitioner.
However, I have been warned that special attention has to be applied for
Order Preserving
Jonathan,
Thanks for reporting an issue.
I will wait and see.
2010年5月25日23:29 Jonathan Ellis jbel...@gmail.com:
Turns out this is a bug in the version of MoinMoin the ASF has
installed. There's nothing we can do until the infrastructure team
upgrades:
Hi
There are 3 Cassandra servcer runing, and 18 process insert lots of data
into the Cassandra servcer.
After runing for an hour the Cassandra servcer crashed.
The error msg is below:
INFO [GC inspection] 2010-05-26 00:56:50,153 GCInspector.java (line 110) GC
for ConcurrentMarkSweep: 7764
The best examples are in KeyspaceTest but don't include all scenarios
On May 26, 2010 2:27 AM, Nicholas Sun nick@raytheon.com wrote:
I am also interested in this. It seems like adding multiple Cols into a CF
or SuperCols would be very useful. Like a dataload type capability?
Nick
Could you please provide some indication as to their location? Thanks.
Nick
From: Ran Tavory [mailto:ran...@gmail.com]
Sent: Tuesday, May 25, 2010 9:15 PM
To: user@cassandra.apache.org
Subject: Re: RE: Hector samples -- where?
The best examples are in KeyspaceTest but don't include
Thanks All,
I found it here:
http://code.google.com/p/cassandra-java-client/source/browse/trunk/src/test/java/org/yosemite/jcsadra/impl/KeySpaceTest.java?r=50
I’m actually fairly new to OSS, but I wanted to really dig into the
software here. So far, so good.
Nick
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