Hi,
performance wise, in a multi-threaded environment, should each Cassandra.Client
have it's own new TBinaryProtocol and TSocket? (I'm using java) Or can many
clients be created with the same protocol object?
Thanks in advance,
Kevin.
If you are reading and making decisions about what to write just remember there
are no transactions. You are essentially running at a Read Uncommitted level of
transaction isolation, with regard of batch mutations (a mutation for a single
row is atomic).
If you can it may be less headache to wr
On 8/28/10 2:44 PM, Benjamin Black wrote:
On Sat, Aug 28, 2010 at 2:34 PM, Anthony Molinaro
wrote:
I think maybe he thought you meant put a layer between cassandra internal
communication.
No, I took the question to be about client connections.
There's no problem balancing client connection
thanks for the updates, i'm going to increase memory for the nodes. as for
the remote latency, i'm puzzled
On 29 August 2010 00:54, Benjamin Black wrote:
> That means you only have a 1G heap. It's no surprise it dies (most
> likely OOM; CMS runs are not inherently bad). Don't see immediately
>
On Aug 28, 2010, at 12:29 PM, Mark wrote:
> Also, what would be a good way of monitoring the health of the cluster?
We use Ganglia. I believe failover is usually built into clients. Not sure why
using HAProxy or LVS wouldn't be a good option though. I used to use it with
MySQL slaves with much
That means you only have a 1G heap. It's no surprise it dies (most
likely OOM; CMS runs are not inherently bad). Don't see immediately
why you are seeing the remote latency go up that high, but it is
unlikely yo be a Cassandra problem.
On Sat, Aug 28, 2010 at 4:01 PM, Fernando Racca wrote:
> ca
cassandra.in.sh is default, just changed the jmx port
Storage.conf
Benchmark Cluster
true
true
org.apache.cassandra.locator.RackUnawareStrategy
2
org.apache.cassandra.locator.EndPointSnitch
org.apache.cassandra.auth.AllowAllAuthenticator
org.apache.cas
cassandra.in.sh?
storage-conf.xml?
output of iostat -x while this is going on?
turn GC log level to debug?
On Sat, Aug 28, 2010 at 2:02 PM, Fernando Racca wrote:
> Hi,
> I'm currently executing some benchmarks against 0.6.5, which i plan to
> compare against 0.7-beta1, using the YCSB client
> I'm
On Sat, Aug 28, 2010 at 2:34 PM, Anthony Molinaro
wrote:
> I think maybe he thought you meant put a layer between cassandra internal
> communication.
No, I took the question to be about client connections.
> There's no problem balancing client connections with
> haproxy, we've been pushing sever
munin is the simplest thing. There are numerous JMX stats of interest.
As a symmetric distributed system, you should not expect to monitor
Cassandra like you would a web server. Intelligent clients use
connection pools and react to current node behavior in making choices
of where to send request
I think maybe he thought you meant put a layer between cassandra internal
communication. There's no problem balancing client connections with
haproxy, we've been pushing several billion requests per month through
haproxy to cassandra.
we use
mode tcp
balance leastconn
server local 127.0.0.
Because you create a bottleneck at the HAProxy and because the
presence of the proxy precludes clients properly backing off from
nodes returning errors. The proper approach is to have clients
maintain connection pools with connections to multiple nodes in the
cluster, and then to spread requests a
Hi,
I'm currently executing some benchmarks against 0.6.5, which i plan to
compare against 0.7-beta1, using the YCSB client
I'm experiencing some strange behaviour when running a small 2 nodes cluster
using OrderPreservingPartitioner. Does anybody have any experience on using
the client to genera
Have you tried with beta1 and is there a repro you can put in a bug
report in jira?
On Sat, Aug 28, 2010 at 11:28 AM, Todd Burruss wrote:
> Trunk
>
>
>
> -Original Message-
> From: Benjamin Black [...@b3k.us]
> Received: 8/28/10 10:05 AM
> To: user@cassandra.apache.org [u...@cassandra.apa
On 8/28/10 11:20 AM, Benjamin Black wrote:
no and no.
On Sat, Aug 28, 2010 at 10:28 AM, Mark wrote:
I will be loadbalancing between nodes using HAProxy. Is this recommended?
Also is there a some sort of ping/health check uri available?
Thanks
Also, what would be a good way of monitoring
Trunk
-Original Message-
From: Benjamin Black [...@b3k.us]
Received: 8/28/10 10:05 AM
To: user@cassandra.apache.org [u...@cassandra.apache.org]
Subject: Re: RowMutationVerbHandler.java (line 78) Error in row mutation
Todd,
Are you using beta1 or trunk code?
b
On Fri, Aug 27, 2010 at
On 8/28/10 11:20 AM, Benjamin Black wrote:
no and no.
On Sat, Aug 28, 2010 at 10:28 AM, Mark wrote:
I will be loadbalancing between nodes using HAProxy. Is this recommended?
Also is there a some sort of ping/health check uri available?
Thanks
any reason on why loadbalancing client connec
no and no.
On Sat, Aug 28, 2010 at 10:28 AM, Mark wrote:
> I will be loadbalancing between nodes using HAProxy. Is this recommended?
>
> Also is there a some sort of ping/health check uri available?
>
> Thanks
>
I will be loadbalancing between nodes using HAProxy. Is this recommended?
Also is there a some sort of ping/health check uri available?
Thanks
Todd,
Are you using beta1 or trunk code?
b
On Fri, Aug 27, 2010 at 3:58 PM, B. Todd Burruss wrote:
> i got the latest code this morning. i'm testing with 0.7
>
>
> ERROR [ROW-MUTATION-STAGE:388] 2010-08-27 15:54:58,053
> RowMutationVerbHandler.java (line 78) Error in row mutation
> org.apache
I'm wondering what the performance considerations are on Join-like queries.
I have a ColumnFamily that holds millions of records (not unusual as I
understand) and I want to work on them using Pig and Hadoop. Until now we
always fetched all rows in Cassandra and just filtered and worked on them.
Th
On Sat, 2010-08-28 at 13:00 +0530, cassam read wrote:
> I have tried cassandra 0.6.4 with replication factor 3 on 4 VM node .
> everything (column,super-column,
> replication,failover) i tried was successful from cli.
> But I am stucked with thrift client. How to access cassandra thrift.
> Do i hav
you need thrift before you can use any of the clients built on top of
it. http://wiki.apache.org/cassandra/InstallThrift
On Sat, Aug 28, 2010 at 2:30 AM, cassam read wrote:
> Hi guys
> I have tried cassandra 0.6.4 with replication factor 3 on 4 VM node .
> everything (column,super-column,
> repli
Thanks ... The format and download links did the trick
-phil
On Aug 28, 2010, at 7:38 AM, Jeremy Hanna wrote:
> Looks like below each video (on blip.tv) there's a download link - downloads
> to a flash video (.flv) file.
>
> On Aug 28, 2010, at 5:33 AM, Phil Stanhope wrote:
>
>> I'm about to
http://www.riptano.com/blog/slides-and-videos-cassandra-summit-2010
Looks like below each video (on blip.tv) there's a download link - downloads to
a flash video (.flv) file.
On Aug 28, 2010, at 5:33 AM, Phil Stanhope wrote:
> I'm about to be on a series of long plane flights ... is there way to
> download the videos from the summit for offline viewing?
I'm about to be on a series of long plane flights ... is there way to
download the videos from the summit for offline viewing?
> Before I applied these changes the young gen and the survivor space
> were very spiky. Now they both seem very low all the time. As you see
> from my screen shot, before these changes my JVM memory would make
> large saw tooths, now all three pools young, eden, perm seem smoother.
I'm not sure w
Hi guys
I have tried cassandra 0.6.4 with replication factor 3 on 4 VM node .
everything (column,super-column,
replication,failover) i tried was successful from cli.
But I am stucked with thrift client. How to access cassandra thrift.
Do i have to compile thrift pkg for perl or I can directly used
29 matches
Mail list logo
