Anti-pattern. Dynamically altering the schema won't scale and is bad ju ju.
--
Colin Clark
+1-320-221-9531
> On Oct 6, 2014, at 10:56 PM, Todd Fast wrote:
>
> There is a team at my work building a entity-attribute-value (EAV) store
> using Cassandra. There is a colu
I would try propertyfilesnitch and use the public ip's of the nodes in aws.
You'll need to set the configuration files on each node.
> On Oct 26, 2014, at 9:44 PM, Srinivas Chamarthi
> wrote:
>
> what about for the nodes on the private cloud cluster ? if I mention,
> ec2MultiRegion, it is
When I use virtual nodes, I typically use a much smaller number - usually in
the range of 10. This gives me the ability to add nodes easier without the
performance hit.
--
Colin Clark
+1-320-221-9531
> On Oct 28, 2014, at 10:46 AM, Alain RODRIGUEZ wrote:
>
> I have been tr
I cant run opscenter in a secure environment for a couple of reasons, one - it
phones home, two - lack of role based security.
It is a mistake to call a proprietary piece of software community when you cant
use it in production.
It is easy enough to automate what opscenter does rather than rely
specific offerings.
--
Colin Clark
+1-320-221-9531
> On Oct 28, 2014, at 10:41 AM, Tyler Hobbs wrote:
>
>
>> On Tue, Oct 28, 2014 at 10:08 AM, Colin wrote:
>> It is a mistake to call a proprietary piece of software community when you
>> cant use it in production.
cassandra with datatstax proprietary offerings.
And now I will tell you that, in a blanket statement, opscenter *IS NOT READY
FOR A PRODUCTION ENVIRONMENT*
Your mileage may vary, and you might not take security very seriously, so go
head and expose your cluster.
Enjoy!
--
Colin Clark
+1-320
Almost every stream processing system I know of offers joins out of the box and
has done so for years
Even open source offerings like Esper have offered joins for years.
What hasnt are systems like storm, spark, etc which I dont really classify as
stream processors anyway.
--
Colin
Forcing a major compaction is usually a bad idea. What is your reason for
doing that?
--
Colin Clark
+1-320-221-9531
> On Jan 2, 2015, at 1:17 PM, Dan Kinder wrote:
>
> Hi,
>
> Forcing a major compaction (using nodetool compact) with STCS will result in
> a single
Use a message bus with a transactional get, get the message, send to cassandra,
upon write success, submit to esp, commit get on bus. Messaging systems like
rabbitmq support this semantic.
Using cassandra as a queuing mechanism is an anti-pattern.
--
Colin Clark
+1-320-221-9531
> On Ja
Try running
Nodetool status system
By specifying a keyspace (system) in the command, you should get more
meaningful results. Using the command on keyspaces as you dev/test/etc will
provide real results.
--
Colin Clark
+1-320-221-9531
> On Jan 17, 2015, at 7:22 PM, Tim Dunphy wr
stractions externally as
internally.
--
Colin Clark
+1-320-221-9531
> On Jan 18, 2015, at 9:49 PM, Kevin Burton wrote:
>
> How do people normally setup multiple data center replication in terms of
> number of *local* replicas?
>
> So say you have two data centers, do you
Until the in-memory option stores data off heap, I would strongly recommend
staying away from this option. This was a marketing driven hack in my opinion.
--
Colin Clark
+1 612 859 6129
Skype colin.p.clark
> On Feb 2, 2015, at 5:31 AM, Jan wrote:
>
> HI Gabriel;
>
> I don
o get the data from the other db's.
This avoids conflation of concerns, isolates failures, but is dependent upon
multiple writes. I use a message bus and services based approach.
In my experience, at scale this approach works better and avoids vendor lock in.
--
Colin Clark
+1 612 859
nized by uuid, and user name (cluster on the name).
This pattern is referred to as an inverted index and provides a lot of power
and flexibility once mastered. I use it all the time with cassandra - in fact,
to be successful with cassandra, it might actually be a requirement!
--
Colin Clark
+
The most data I put on a node with spinning disk is 1TB.
What are the machine specs? Cpu, memory, etc and what is the read/write
pattern-heavy ingest rate/heavy read rate and how ling do you keep data in the
cluster?
--
Colin Clark
+1 612 859 6129
Skype colin.p.clark
> On Feb 8, 2015, a
Stop using opscenter?
:)
Sorry, couldnt resist...
--
Colin Clark
+1 612 859 6129
Skype colin.p.clark
> On Feb 9, 2015, at 3:01 AM, Björn Hachmann wrote:
>
> Good morning,
>
> unfortunately my last rolling restart of our Cassandra cluster issued from
> OpsCenter (5.0.2) f
gives more flexibility in terms of large datasets and
performance. The very nature of cassandra's distributed nature vs partitioning
data on hadoop makes spark on hdfs actually fasted than on cassandra
--
Colin Clark
+1 612 859 6129
Skype colin.p.clark
> On Feb 11, 2015, at 4:49
it's in production at my company)
--
Colin Clark
+1 612 859 6129
Skype colin.p.clark
> On Feb 11, 2015, at 6:51 AM, DuyHai Doan wrote:
>
> "The very nature of cassandra's distributed nature vs partitioning data on
> hadoop makes spark on hdfs actually fasted than o
No, the question isnt closed. You dont get to decide that.
I dont run a website making claims regarding cassandra and spark - your
employer does.
Again, where are your benchmarks?
I will publish mine, then we'll see what you've got.
--
Colin Clark
+1 612 859 6129
Skype col
Yikes, 18tb/node is a very bad idea.
I dont like to go over 2-3 personally and you have to be careful with JBOD.
See one of Ellis's latest posts on this and suggested use of LVM. It is a
reversal on previous position re JBOD.
--
Colin
+1 612 859 6129
Skype colin.p.clark
> On Apr
When updating, use table that uses rows of words and increment the count?
--
Colin
+1 320 221 9531
> On Jan 20, 2014, at 6:58 AM, David Tinker wrote:
>
> I haven't actually tried to use that schema yet, it was just my first idea.
> If we use that solution our app would
Read users score, increment, update friends list, update user with new high
score
Would that work?
--
Colin
+1 320 221 9531
> On Jan 22, 2014, at 11:44 AM, Kasper Middelboe Petersen
> wrote:
>
> Hi!
>
> I'm a little worried about the data model I have co
Might this work?
--
Colin
+1 320 221 9531
> On Jan 22, 2014, at 11:13 AM, Kasper Middelboe Petersen
> wrote:
>
> Many million users. Just the one game- I might have some different scores I
> need to keep track of, but I very much hope to be able to use the same
> app
node knows that address as well.
There's a good guide to configuration on the datastax website.
--
Colin
+1 320 221 9531
> On Jan 28, 2014, at 9:55 PM, Kumar Ranjan wrote:
>
> I am in process of setting 2 node cluster with C* version 2.0.4. When I
> started each n
Have you tried the Datastax java driver?
--
Colin
320-221-9531
> On Mar 27, 2014, at 8:17 AM, user 01 wrote:
>
> Which hector version is suitable for cassandra 2.0.6 ?
>
> I am seeing that version 1.1-4(which I believe is latest release?) has been
> there around since v
OpenJDK will crash under load whilst running Cassandra.
--
Colin
+1 320 221 9531
> On Mar 28, 2014, at 4:11 PM, Jon Forrest wrote:
>
> In a previous message I described my guess at
> what was causing the Datastax Cassandra installation
> to require OpenJDK. Using the me
replicas.
I will be doing some more testing on this under different scenarios, but so far
so good
However, I would strongly recommend an RF of at least 3 when performing quorum
based reads because otherwise you're subject to failed reads in event of losing
one node.
--
Colin
320-221-9531
It seems to run ok, but I havent seen it yet in production on 8.
--
Colin Clark
+1-320-221-9531
> On Apr 28, 2014, at 4:01 PM, "Ackerman, Mitchell"
> wrote:
>
> I’ve been searching around, but cannot find any information as to whether
> Cassandra runs on JRE 8.
that with the pure proprietary model, and I'm sure it will
help you sleep easier.
--
Colin Clark
+1-320-221-9531
> On May 15, 2014, at 10:52 AM, "Jack Krupansky"
> wrote:
>
> You can always check the project committer wiki:
> http://wiki.apache.org/cassandra/Comm
You may have used the old random partitioner token generator. Use the murmur
partitioner token generator instead.
--
Colin
320-221-9531
> On May 17, 2014, at 1:15 PM, Tim Dunphy wrote:
>
> Hey all,
>
> I've set my initial_token in cassandra 2.0.7 using a python scri
Cassandra offers compression out of the box. Look into the options available
upon table creation.
The use of orderedpartitioner is an anti-pattern 999/1000 times. It creates
hot spots - the use of wide rows can often accomplish the same result through
the use of clustering columns.
--
Colin
make sure a good number of nodes are in agreement before proceeding.
Does this make sense?
--
Colin Clark
+1-320-221-9531
> On May 18, 2014, at 3:30 AM, Jan Algermissen
> wrote:
>
> Hi,
>
> in our project, we apparently have a problem or misunderstanding of the
>
post a link to my github with an example when I get off the road
--
Colin
320-221-9531
> On May 25, 2014, at 1:56 PM, "Jack Krupansky" wrote:
>
> Typo: I presume “channelid” should be “tagid” for the partition key for your
> table.
>
> Yes, BATCH statements are
Also, make sure you're using prepared statements.
--
Colin
320-221-9531
> On May 25, 2014, at 1:56 PM, "Jack Krupansky" wrote:
>
> Typo: I presume “channelid” should be “tagid” for the partition key for your
> table.
>
> Yes, BATCH statements are the way
Charlie,
I would be willing to help you out with your issues tomorrow afternoon, feel
free to give me a call after 4m ET. There are lots of people who store *and*
update data with cassandra (at scale).
--
Colin Clark | Solutions Architect
DataStax | www.datastax.com
m | +1-320-221-9531
e
Why wouldnt you use datastax enterprise in-memory option vs oracle coherence?
> On May 27, 2014, at 10:33 PM, Samir Faci wrote:
>
> http://www.datastax.com/docs/1.0/references/sstable2json might be what
> you're looking for. It's in the bin folder of your cassandra installation.
>
> Thou
Set it up as one cluster with multiple datacenters and configure replication
accordingly.
--
Colin Clark
+1-320-221-9531
> On Jun 1, 2014, at 2:43 PM, Kevin Burton wrote:
>
> As far as I understand, this is impossible.
>
> There isn't a way to figure out which sta
The OS should handle this really well as long as your on v3 linux kernel
--
Colin Clark
+1-320-221-9531
> On Jun 1, 2014, at 2:49 PM, Kevin Burton wrote:
>
> It's possible to set caching to:
>
> all, keys_only, rows_only, or none
>
> .. for a given table.
Have you been unable to achieve your SLA's using Cassandra out of the box so
far?
Based upon my experience, trying to tune Cassandra before the app is done and
without simulating real world load patterns, you might actually be doing
yourself a disservice.
--
Colin
320-221-9531
>
Your data model will most likely be the far most important component of your
migration. Get that right, and the rest is easy.
--
Colin Clark
+1-320-221-9531
> On Jun 1, 2014, at 7:01 PM, Kevin Burton wrote:
>
> Good question. still migrating.. but we don't want to paint ou
I believe Byteorderedpartitioner is being deprecated and for good reason. I
would look at what you could achieve by using wide rows and murmur3partitioner.
--
Colin
320-221-9531
> On Jun 6, 2014, at 5:27 PM, Kevin Burton wrote:
>
> We have the requirement to have clients read
might prove useful.
--
Colin
320-221-9531
> On Jun 7, 2014, at 1:53 PM, Kevin Burton wrote:
>
> Another way around this is to have a separate table storing the number of
> buckets.
>
> This way if you have too few buckets, you can just increase them in the
> future.
>
The add seconds to the bucket. Also, the data will get cached-it's not going
to hit disk on every read.
Look at the key cache settings on the table. Also, in 2.1 you have even more
control over caching.
--
Colin
320-221-9531
> On Jun 7, 2014, at 4:30 PM, Kevin Burton wrote:
>
To have any redundancy in the system, start with at least 3 nodes and a
replication factor of 3.
Try to have at least 8 cores, 32 gig ram, and separate disks for log and data.
Will you be replicating data across data centers?
--
Colin
320-221-9531
> On Jun 7, 2014, at 9:40 PM, Kevin Bur
ion so far, I don't think you need to get too funky
with your data access layer.
Whatever you do, make sure the driver you use supports CQL 3 and the native
protocol. Thrift, like BOP, will most likely go away at some point in the
future.
--
Colin
320-221-9531
> On Jun 8, 2014, at 8:58
has asked-his project is ambitious
for a first dip into Cassandra, I want to see him succeed, and have given him
the same advice I give our customers.
--
Colin
320-221-9531
> On Jun 8, 2014, at 9:43 PM, Jeff Genender wrote:
>
> Comments in line...
>
>> On Jun 8, 2014, at 8
ted in the same thing-helping people be successful using Casaandra.
--
Colin
320-221-9531
> On Jun 8, 2014, at 10:24 PM, Johan Edstrom wrote:
>
> On a second reply I'll provide some docs.
>
> We looked at Astynax (Yeah I didn't like the refactor)
> We looked at sprin
Rowcache is typically turned off because it is only useful in very specific
situations-the row(s) need to fit in memory. Also, the access patterns have to
fit.
If all the rows you're accessing can fit, Rowcache is a great thing. Otherwise,
not so great.
--
Colin
320-221-9531
>
Hey guy, have you tried amazon turk?
--
Colin Clark
+1 315 886 3422 cell
+1 701 212 4314 office
http://cloudeventprocessing.com
http://blog.cloudeventprocessing.com
@EventCloudPro
*Sent from Star Trek like flat panel device, which although larger than my Star
Trek like communicator device, may
Does anyone know where an rpm for 0.7.6-2 might be? (rhel)
I checked the datastax site and only see up to 0.7.6-1
packaging.
This keeps coming up though, so I'll probably just go ahead and roll a
0.7.6-2 for rpm.datastax.com so as not to confuse folks.
On Tue, Jun 14, 2011 at 4:19 PM, Colin wrote:
> Does anyone know where an rpm for 0.7.6-2 might be? (rhel)
>
>
>
> I checked the datastax sit
Kevin,
You will find that many of us using cassanda are already doing what you suggest
(custom serializer/deserializer).
We call it JSON.
--
Colin
*Sent from Star Trek like flat panel device, which although larger than my Star
Trek like communicator device, may have typo's and ex
Mysql?
--
Colin
+1 320 221 9531
On Jul 25, 2013, at 6:08 AM, Derek Andree wrote:
> Yeah, Rob is smart. don't run crap in production. Run what others are
> stable at. If you are running the latest greatest dumbest craziest in prod
> then you ask for fail, and you will
I wouldnt buy that book, it's old and not too useful.
Find some tutorials and dive in.
> On Oct 27, 2013, at 8:54 PM, Mohan L wrote:
>
>
>
>
>> On Sun, Oct 27, 2013 at 9:57 PM, Erwin Karbasi wrote:
>> Hey Guys,
>>
>> What is the best book to learn Cassandra from scratch?
>>
>> Thanks
Unsubscribe
Please
Sent from my iPad
On Dec 12, 2010, at 1:26 AM, Dave Martin wrote:
> Hi there,
>
> I see the following:
>
> 1) Add 8,000,000 columns to a single row. Each column name is a UUID.
> 2) Use cassandra-cli to run count keyspace.cf['myGUID']
>
> The following is reported in the
Eric,
Seems like the answer to everything is 8.
8 has been very painful.
Are you saying that 8 will or not be compatible with 7?
If not, would you recommend waiting until 8? We have done an awful lot of
work, have an awful lot of work left, and have become very frustrated.
Any idea on when
rom: Edward Capriolo [mailto:edlinuxg...@gmail.com]
Sent: Tuesday, March 29, 2011 9:58 PM
To: user@cassandra.apache.org
Subject: Re: Ditching Cassandra
On Tue, Mar 29, 2011 at 9:56 PM, Colin wrote:
> Eric,
>
> Seems like the answer to everything is 8.
>
> 8 has been very painful.
>
Thank you Eric. I appreciate it.
-Original Message-
From: Eric Evans [mailto:eev...@rackspace.com]
Sent: Tuesday, March 29, 2011 11:47 PM
To: user@cassandra.apache.org
Subject: Re: Ditching Cassandra
On Tue, 2011-03-29 at 20:56 -0500, Colin wrote:
> Are you saying that 8 will or not
unsubscribe
-Original Message-
From: Aaron Morton [mailto:aa...@thelastpickle.com]
Sent: Wednesday, September 22, 2010 7:47 PM
To: user@cassandra.apache.org
Subject: Re: column expiration and rows in 0.7
The data will only be physically deleted when a major compaction runs and
the GCGra
Hi,
The feature of speculative execution in Cassandra 2.0 helps in this case.
You can get further explanation on below link.
http://www.datastax.com/dev/blog/rapid-read-protection-in-cassandra-2-0-2
Thanks!
On Tue, Dec 6, 2016 at 10:13 AM, Sungju Hong wrote:
> Hello,
>
> when I restart a node
he version you are
using. It might also be nice for DataStax to update the 1.1
documentation with a warning.
--
*Colin Blower*
On 01/22/2013 04:06 AM, Paul van Hoven wrote:
Okay, that worked. Why is the statement from the tutorial wrong. I
mean, why would a company like datastax post somthing
Hi Tim,
The node with IP 94 is leaving. Maybe something wrong happens during
streaming data. You could use "nodetool netstats" on both nodes to monitor
if there is any streaming connection stuck.
Indeed, you could force remove the leaving node by shutting down it
directly. Then, perform "nodetool
Hi,
Can you please firstly check the "nodetool compactionstats" during repair?
I'm afraid that minor compaction may be blocked by whatever tasks that
causes the number of SStable keep growing.
On Sat, Nov 15, 2014 at 7:47 AM, James Derieg
wrote:
> Hi everyone,
> I'm hoping someone can help me w
I may be forced to run Cassandra on top of Ceph. Does anyone have
experience / tips with this. Or alternatively, strong reasons why this
won't work.
cheers
Colin
nt (excepting for C*) and that's their standard.
cheers
Colin
On 2 February 2015 at 14:42, Daniel Compton
wrote:
> As Jan has already mentioned, Ceph and Cassandra do almost all of the same
> things. "Replicated self healing data storage on commodity hardware without
> a SPOF&
Oops - Nonetheless in on my environments -> Nonetheless in *one of* my
environments
On 2 February 2015 at 16:12, Colin Taylor wrote:
> Thanks all for you input.
>
> I'm aware of the overlap, I'm aware I need to turn Ceph replication off,
> I'm aware this isn
usually
considered a bad idea and is simply not even permitted by most RDBMS.
—
Colin Clark
co...@clark.ws
+1 320-221-9531
skype colin.p.clark
> On Feb 8, 2015, at 4:16 PM, Eric Stevens wrote:
>
> It sounds like changing user names is the kind of thing which doesn't happen
> often,
I typically use a # a lot lower than 256, usually less than 20 for num_tokens
as a larger number has historically had a dramatic impact on query performance.
—
Colin Clark
co...@clark.ws
+1 612-859-6129
skype colin.p.clark
> On Mar 28, 2015, at 3:46 PM, Eric Stevens wrote:
>
>
unsubscribe
> On Apr 18, 2015, at 4:26 PM, Bill Miller wrote:
>
> I tried restarting two nodes that were working and now I get this.
>
>
>
> INFO 15:13:50,296 Initializing system.range_xfers
> INFO 15:13:50,300 Initializing system.schema_keyspaces
> INFO 15:13:50,301 Opening
> /cassandra/
unsubscribe
> On Apr 20, 2015, at 8:08 AM, Carlos Rolo wrote:
>
> Independent of the snitch, data needs to travel to the new nodes (plus all
> the keyspace information that goes via gossip). So I won't bootstrap them all
> at once, even if it is only for network traffic generated.
>
> Don't
nodes in a
cluster? I’m not seeing an obvious configuration option for that, presumably
because it obviates much of the point of using Cassandra, but again, we’re
working within some rather unfortunate constraints.
Any hints or suggestions would be most gratefully received.
Kind regards,
-Colin
ally is a question of: *can* I cripple Cassandra in this way, and if so
how?
Thanks for the response.
-Colin MacDonald-
datacentre" a logical group *within* an overall cluster? So I can
create a separate "datacentre" for each node, and if I write to that node the
data will be forced to stay in that datacentre, i.e. that node?
I do apologise for the noobish questions, my attention is currently split
between investigating several possible solutions. I rather favour Cassandra
though, if I can hobble it appropriately.
Kind regards,
-Colin MacDonald-
the
> "other nodes" group, C* will gladly honor it and store no data on node of the
> "other nodes" group).
>
> --
> Sylvain
Thank you so much, that's clear and helpful. I appreciate you taking the time
to explain it.
-Colin-
Is the jar on the path? Is cassandra home set correctly?
Looks like cassandra cant find the jar-verify existence by searching.
--
Colin
+1 320 221 9531
On Jan 22, 2014, at 11:50 AM, Chiranjeevi Ravilla
wrote:
Hi All,
I am using Apache Cassandra 2.0.4 version with cassandra-jdbc-1.2.5
How many users and how many games?
--
Colin
+1 320 221 9531
On Jan 22, 2014, at 10:59 AM, Kasper Middelboe Petersen <
kas...@sybogames.com> wrote:
I can think of two cases where something bad would happen in this case:
1. Something bad happens after the increment but before some or all
r's friend list
on one row. The row would look like this:
ROWID
USERID
Colin
+1 320 221 9531
On Thu, Jan 23, 2014 at 2:34 AM, Kasper Middelboe Petersen <
kas...@sybogames.com> wrote:
> What would the consequence be of having this updated highscore table
> (using friendId as part
y updating all rows with that userid with the new score
That way, all friends are on the same row, which makes query easy. And you
can still issue query to find the top score across the entire userbase by
querying userid, and userscore.
Is this a better explanation of my previous and lame explanat
.com>> wrote:
>
> What is your strategy/tools set to backup your Cassandra nodes,
> apart from from cluster replication/ snapshots within cluster?
>
>
--
*Colin Blower*
/Software Engineer/
Barracuda Networks Inc.
=
ecimal type.
>
> Or in the absence of a spec, just a heads up from other language
> driver implementors as to what approach they've taken.
>
> Does this make sense?
>
> Cheers,
>
> Ben
--
*Colin Blower*
/Software Engineer/
Barracuda Networks Inc.
+1 408-
tomcat.t5 where c1='concerted value';
>
> Thanks in advance for the help.
>
--
*Colin Blower*
/Software Engineer/
Barracuda Networks Inc.
+1 408-342-5576 (o)
===
Find out how eSigning generates significant financial benef
;))
(do
(ccm/switch! "testcluster")
(ccm/start! "testcluster")))
(ccm/remove! "testcluster")
cheers
Colin Taylor
You probably generated the wrong token type. Look for a murmur token
generator on the Datastax site.
--
Colin
320-221-9531
On May 17, 2014, at 7:00 PM, Tim Dunphy wrote:
Hi and thanks for your response.
The puzzling thing is that yes I am using the murmur partition, yet I am
still getting
le to see what you've changed.
--
Colin
320-221-9531
On May 17, 2014, at 10:29 PM, Tim Dunphy wrote:
You probably generated the wrong token type. Look for a murmur token
> generator on the Datastax site.
What Colin is saying is that the tool you used to create the token, is not
>
Try this:
nodetool decomission
UN means UP, NORMAL
--
Colin
+1 320 221 9531
On Sun, May 25, 2014 at 9:09 AM, Tim Dunphy wrote:
> Also for information that may help diagnose this issue I am running
> cassandra 2.0.7
>
> I am also using these java options:
>
> [root@beta
Is your version of Hector using native protocol or thrift?
--
Colin
+1 320 221 9531
On Mon, Jun 2, 2014 at 6:41 AM, Peter Lin wrote:
>
> I'm happy to announce Concord has decided to open source our port of
> Hector to .Net.
>
> The project is hosted on google code
> ht
Unless a cassandra driver is using the native protocol, it's going to have
a very short life going forward.
--
Colin
+1 320 221 9531
On Mon, Jun 2, 2014 at 7:10 AM, Peter Lin wrote:
>
> it is using thrift. I've updated the project page to state that info.
>
>
> On Mo
Peter,
There's very little reason today to write your own Cassandra driver for
.net, java, or python. Those firms that do are now starting to wrap those
drivers with any specific functionality they might require, like Netflix,
for example. Have you looked at DataStax's .NET driver?
-
ients (huge) connect directly the
cluster to do this-put some type of app server in between to handle the
comm's and fan out. You'll get better utilization of resources and less
overhead in addition to flexibility of which data center you're utilizing
to serve requests.
--
Colin
3
rity of my days helping people
utilize Cassandra correctly, and rescuing those that haven't.
:)
--
Colin
320-221-9531
On Jun 7, 2014, at 6:53 PM, Kevin Burton wrote:
well you could add milliseconds, at best you're still bottlenecking most of
your writes one one box.. maybe 2-3 if there
Not if you add another column to the partition key; source for example.
I would really try to stay away from the ordered partitioner if at all
possible.
What ingestion rates are you expecting, in size and speed.
--
Colin
320-221-9531
On Jun 7, 2014, at 9:05 PM, Kevin Burton wrote:
Thanks
With 100 nodes, that ingestion rate is actually quite low and I don't think
you'd need another column in the partition key.
You seem to be set in your current direction. Let us know how it works out.
--
Colin
320-221-9531
On Jun 7, 2014, at 9:18 PM, Kevin Burton wrote:
What's
r of 3 ensures reads and protection against
losing a node.
In event of losing a node, you can downgrade the CL automatically and then
also accept a little eventual consistency.
--
Colin
320-221-9531
On Jun 7, 2014, at 10:03 PM, James Campbell
wrote:
This is a basic question, but having heard that
You won't need containers - running one instance of Cassandra in that
configuration will hum along quite nicely and will make use of the cores
and memory.
I'd forget the raid anyway and just mount the disks separately (jbod)
--
Colin
320-221-9531
On Jun 7, 2014, at 10:02 PM, Ke
Hi Francois,
We're facing the same issue like yours. The approach we did is to
1. scrub that corrupted data file
2. repair that column family
Immediately delete that corrupted files is not suggested if C* instance is
running.
This might be happening if bad disk or power outage.
Thanks,
As Jake suggested, you could firstly increase
"compaction_throughput_mb_per_sec" and "concurrent_compactions" to suitable
values if system resource is allowed. From my understanding, major
compaction will internally acquire lock before running compaction. In your
case, there might be a major compac
You can use "nodetool repair" instead. Repair is able to re-transmit the
data which belongs to new node.
On Tue, Jun 10, 2014 at 10:40 AM, Mike Heffner wrote:
> Hi,
>
> During an attempt to bootstrap a new node into a 1.2.16 ring the new node
> saw one of the streaming nodes periodically disap
Triggering a major compaction is usually not a good idea.
If you've got ssd's, go leveled as DuyHai says. The results will be tasty.
--
Colin
320-221-9531
On Jul 24, 2014, at 5:28 PM, Kevin Burton wrote:
This was after a bootstrap… so I triggered a major compaction. Should I
ju
Have you created the schema for these data files? I meant the schema should
be created before you load these data file to C*.
Here is the article for introduction of sstableloader that you could refer.
http://www.datastax.com/documentation/cassandra/1.2/cassandra/tools/toolsBulkloader_t.html
On
Its ugly for integration testing ...
Socket socket = new Socket("127.0.0.1", 9170);
final OutputStream cli = socket.getOutputStream();
log.info("loading schema via cli");
new PrintWriter(cli).print(new String(readFully(new
FileInputStream("cassandra-schema";
cli
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