Not that I know of. I've always been really strict about dumping my
schemas (to start) and keeping my changes in migration files. I don't do a
ton of schema changes so I haven't had a need to really automate it.
Even with MySQL I never bothered.
Jon
On Thu, Oct 4, 2012 at 6:27 PM, John Sanda
if there is already something out there.
If not though, I will be sure to post back to the list with whatever I wind
up doing.
On Thu, Oct 4, 2012 at 9:34 PM, Jonathan Haddad j...@jonhaddad.com wrote:
Not that I know of. I've always been really strict about dumping my
schemas (to start) and keeping
You should run a nodetool repair after you copy the data over. You could
also use the sstable loader, which would stream the data to the proper node.
On Thu, Jul 4, 2013 at 10:03 AM, srmore comom...@gmail.com wrote:
We are planning to move data from a 2 node cluster to a 3 node cluster. We
Are you using leveled compaction? If so, what do you have the file size
set at? If you're using the defaults, you'll have a ton of really small
files. I believe Albert Tobey recommended using 256MB for the
table sstable_size_in_mb to avoid this problem.
On Sun, Jul 14, 2013 at 5:10 PM, Paul
Everything is written to the commit log. In the case of a crash, cassandra
recovers by replaying the log.
On Sat, Jul 20, 2013 at 9:03 AM, Mohammad Hajjat haj...@purdue.edu
wrote:
Patricia,
Thanks for the info. So are you saying that the *whole* data is being
written on disk in the commit
Having just enough RAM to hold the JVM's heap generally isn't a good idea
unless you're not planning on doing much with the machine.
Any memory not allocated to a process will generally be put to good use
serving as page cache. See here: http://en.wikipedia.org/wiki/Page_cache
Jon
On Tue, Jul
It's advised you do not use compact storage, as it's primarily for
backwards compatibility.
The first of these option is COMPACT STORAGE. This option is meanly
targeted towards backward compatibility with some table definition created
before CQL3. But it also provides a slightly more compact
I recommend you do not add 1.2 nodes to a 1.1 cluster. We tried this, and
ran into many issues. Specifically, the data will not correctly stream
from the 1.1 nodes to the 1.2, and it will never bootstrap correctly.
On Thu, Aug 1, 2013 at 2:07 PM, Morgan Segalis msega...@gmail.com wrote:
Hi
...@eventbrite.com wrote:
On Wed, Jul 31, 2013 at 3:10 PM, Jonathan Haddad j...@jonhaddad.comwrote:
It's advised you do not use compact storage, as it's primarily for
backwards compatibility.
Many Apache Cassandra experts do not advise against using COMPACT STORAGE.
[1] Use CQL3 non-COMPACT STORAGE if you
/BigTable . Cassandra was build on the
BigTable/ColumnFamily data model. There was also this big movement called
NoSQL, where people wanted to break free of query languages and rigid
schema's
On Mon, Aug 5, 2013 at 1:56 PM, Jonathan Haddad j...@jonhaddad.com wrote:
The CQL docs recommend
, Jonathan Haddad j...@jonhaddad.com wrote:
If you expected your CQL3 query to work, then I think you've missed the
point of CQL completely. For many of us, adding in a query layer which
gives us predictable column names, but continues to allow us to utilize
wide rows on disk is a huge benefit. Why
My understanding is that if you want to use CQL, you should create your
tables via CQL. Mixing thrift calls w/ CQL seems like it's just asking for
problems like this.
On Sun, Aug 25, 2013 at 6:53 PM, Vivek Mishra mishra.v...@gmail.com wrote:
cassandra 1.2.4
On Mon, Aug 26, 2013 at 2:51 AM,
An alternative to cssh is fabric. It's very flexible in that you can
automate almost any repetitive task that you'd send to machines in a
cluster, and it's written in python, meaning if you're in AWS you can mix
it with boto to automate pretty much anything you want.
On Thu, Aug 29, 2013 at
9/12 = .75
It's a rate, not a percentage.
On Sat, Aug 31, 2013 at 2:21 PM, Sávio Teles savio.te...@lupa.inf.ufg.br
wrote:
I'm running one Cassandra node -version 1.2.6- and I *enabled* the *row
cache* with *1GB*.
But looking the Cassandra metrics on JConsole, *Row Cache
For future references, a blog post on this topic.
http://rustyrazorblade.com/2013/09/cassandra-faq-can-i-start-with-a-single-node/
On Wed, Sep 18, 2013 at 6:38 AM, Michał Michalski mich...@opera.com wrote:
You might be interested in this:
at 1:19 PM, Jonathan Haddad j...@jonhaddad.comwrote:
So, for cqlengine (https://github.com/cqlengine/cqlengine), we're
currently using the thrift api to execute CQL until the native driver is
out of beta. I'm a little biased in recommending it, since I'm one of the
primary authors. If you've
seem worth the risks to us.
ml
On Tue, Nov 26, 2013 at 1:16 PM, Jonathan Haddad
j...@jonhaddad.comwrote:
So, for cqlengine (https://github.com/cqlengine/cqlengine), we're
currently using the thrift api to execute CQL until the native driver is
out of beta. I'm a little biased
No, 2.7 only.
On Tue, Nov 26, 2013 at 3:04 PM, Kumar Ranjan winnerd...@gmail.com wrote:
Hi Jonathan - Does cqlengine have support for python 2.6 ?
On Tue, Nov 26, 2013 at 4:17 PM, Jonathan Haddad j...@jonhaddad.comwrote:
cqlengine supports batch queries, see the docs here:
http
Do you mean high CPU usage or high load avg? (20 indicates load avg to
me). High load avg means the CPU is waiting on something.
Check iostat -dmx 1 100 to check your disk stats, you'll see the columns
that indicate mb/s read write as well as % utilization.
Once you understand the bottleneck
I've recently pushed up a new project to github, which we've named Under
Siege. It's a java agent for reporting Cassandra metrics to statsd. We've
in the process of deploying it to our production clusters. Tested against
Cassandra 1.2.11. The metrics library seems to change on every release of
I believe SSTables are written to a temporary file then moved. If I
remember correctly, tools like tablesnap listen for the inotify event
IN_MOVED_TO. This should handle the try to back up sstable while in
mid-write issue.
On Fri, Dec 6, 2013 at 5:39 AM, Michael Theroux mthero...@yahoo.com
Please include the output of nodetool ring, otherwise no one can help you.
On Thu, Jan 16, 2014 at 12:45 PM, Narendra Sharma narendra.sha...@gmail.com
wrote:
Any pointers? I am planning to do rolling restart of the cluster nodes to
see if it will help.
On Jan 15, 2014 2:59 PM, Narendra
,
I am new to Cassandra Environment, does the order of the ring matter, as
long as the member joins the group?
Yogi
On Thu, Jan 16, 2014 at 12:49 PM, Jonathan Haddad j...@jonhaddad.comwrote:
Please include the output of nodetool ring, otherwise no one can help
you.
On Thu, Jan 16, 2014
I just would advise against it because it's going to be difficult to narrow
down what's causing problems. For instance, if you have Node A which is
performing GC, it will affect query times on Node B which is trying to
satisfy a quorum read. Node B might actually have very low load, and it
will
Upfront TLDR: We want to do stuff (reindex documents, bust cache) when
changed data from DC1 shows up in DC2.
Full Story:
We're planning on adding data centers throughout the US. Our platform is
used for business communications. Each DC currently utilizes elastic
search and redis. A message
Upfront TLDR: We want to do stuff (reindex documents, bust cache) when
changed data from DC1 shows up in DC2.
Full Story:
We're planning on adding data centers throughout the US. Our platform is
used for business communications. Each DC currently utilizes elastic
search and redis. A message
On Saturday, February 22, 2014, Jonathan Haddad j...@jonhaddad.com wrote:
Upfront TLDR: We want to do stuff (reindex documents, bust cache) when
changed data from DC1 shows up in DC2.
Full Story:
We're planning on adding data centers throughout the US. Our platform is
used for business communications
I have a nagging memory of reading about issues with virtualization and not
actually having durable versions of your data even after an fsync (within
the VM). Googling around lead me to this post:
http://petercai.com/virtualization-is-bad-for-database-integrity/
It's possible you're hitting this
have encountered.
Does Cassandra quiesce the file system after a snapshot using fsfreeze or
xfs_freeze? Somehow I doubt it...
On Fri, Mar 28, 2014 at 4:17 PM, Jonathan Haddad j...@jonhaddad.comwrote:
I have a nagging memory of reading about issues with virtualization and
not actually having
.
On Fri, Mar 28, 2014 at 1:32 PM, Laing, Michael
michael.la...@nytimes.comwrote:
+1 for tablesnap
On Fri, Mar 28, 2014 at 4:28 PM, Jonathan Haddad j...@jonhaddad.comwrote:
I will +1 the recommendation on using tablesnap over EBS. S3 is at least
predictable.
Additionally, from a practical
I think of all the areas you could spend your time, this will have the
least returns. The OS will keep the most frequently used data in memory.
There's no reason to require cassandra to do it.
If you're curious as to what's been loaded into ram, try Al Tobey's pcstat
utility.
I'd suggest creating 1 table per day, and dropping the tables you don't
need once you're done.
On Wed, Jun 4, 2014 at 10:44 AM, Redmumba redmu...@gmail.com wrote:
Sorry, yes, that is what I was looking to do--i.e., create a
TopologicalCompactionStrategy or similar.
On Wed, Jun 4, 2014 at
You should read through the token docs, it has examples and specifications:
http://cassandra.apache.org/doc/cql3/CQL.html#tokenFun
On Thu, Jun 5, 2014 at 10:22 PM, Kevin Burton bur...@spinn3r.com wrote:
I'm building a new schema which I need to read externally by paging
through the result
Sorry, the datastax docs are actually a bit better:
http://www.datastax.com/documentation/cql/3.0/cql/cql_using/paging_c.html
Jon
On Thu, Jun 5, 2014 at 10:46 PM, Jonathan Haddad j...@jonhaddad.com wrote:
You should read through the token docs, it has examples and
specifications: http
This may not help you with the migration, but it may with maintenance
management. I just put up a blog post on managing VPC security groups with
a tool I open sourced at my previous company. If you're going to have
different VPCs (staging / prod), it might help with managing security
groups.
Your other option is to fire off async queries. It's pretty
straightforward w/ the java or python drivers.
On Thu, Jun 19, 2014 at 5:56 PM, Marcelo Elias Del Valle
marc...@s1mbi0se.com.br wrote:
I was taking a look at Cassandra anti-patterns list:
? What would be the advantage?
[]s
2014-06-19 22:01 GMT-03:00 Jonathan Haddad j...@jonhaddad.com:
Your other option is to fire off async queries. It's pretty
straightforward w/ the java or python drivers.
On Thu, Jun 19, 2014 at 5:56 PM, Marcelo Elias Del Valle
marc...@s1mbi0se.com.br
the driver reuses the connection?
[]s
2014-06-19 22:16 GMT-03:00 Jonathan Haddad j...@jonhaddad.com:
If you use async and your driver is token aware, it will go to the
proper node, rather than requiring the coordinator to do so.
Realistically you're going to have a connection open to every
, I am using the CQL datastax drivers.
It was a good advice, thanks a lot Janathan.
[]s
2014-06-20 0:28 GMT-03:00 Jonathan Haddad j...@jonhaddad.com:
The only case in which it might be better to use an IN clause is
if
the entire query can be satisfied from that machine. Otherwise,
go
async
Can you do you query in the cli after setting tracing on?
On Mon, Jun 23, 2014 at 11:32 PM, DuyHai Doan doanduy...@gmail.com wrote:
Yes but adding the extra one ends up by * 1000. The limit in CQL3
specifies the number of logical rows, not the number of physical columns in
the storage engine
Triggers only execute on the local coordinator. I would also not
recommend using them.
On Thu, Jul 3, 2014 at 9:58 AM, Robert Coli rc...@eventbrite.com wrote:
On Thu, Jul 3, 2014 at 4:41 AM, Bèrto ëd Sèra berto.d.s...@gmail.com
wrote:
Now the question: is there any way to use triggers so
AM, Jonathan Haddad j...@jonhaddad.com wrote:
Triggers only execute on the local coordinator. I would also not
recommend using them.
On Thu, Jul 3, 2014 at 9:58 AM, Robert Coli rc...@eventbrite.com wrote:
On Thu, Jul 3, 2014 at 4:41 AM, Bèrto ëd Sèra berto.d.s...@gmail.com
wrote:
Now
Did you make sure all the nodes are on the same time? If they're not,
you'll get some weird results.
On Thu, Jul 3, 2014 at 10:30 AM, Sávio S. Teles de Oliveira
savio.te...@cuia.com.br wrote:
Are you sure all the nodes are working at that time?
Yes. They are working.
I would suggest
Make sure you've got ntpd running, otherwise this will be an ongoing nightmare.
On Thu, Jul 3, 2014 at 5:00 PM, Sávio S. Teles de Oliveira
savio.te...@cuia.com.br wrote:
I have synchronized the clocks and works!
2014-07-03 20:58 GMT-03:00 Sávio S. Teles de Oliveira
savio.te...@cuia.com.br:
I've used various databases in production for over 10 years. Each has
strengths and weaknesses.
I ran Cassandra for just shy of 2 years in production as part of both
development teams and operations, and I only hit 1 serious problem
that Rob mentioned. Ideally C* would have guarded against it,
The problem with starting without vnodes is moving to them is a bit
hairy. In particular, nodetool shuffle has been reported to take an
extremely long time (days, weeks). I would start with vnodes if you
have any intent on using them.
On Thu, Jul 17, 2014 at 6:03 PM, Robert Coli
Hey Marcelo,
You should check out spark. It intelligently deals with a lot of the
issues you're mentioning. Al Tobey did a walkthrough of how to set up
the OSS side of things here:
http://tobert.github.io/post/2014-07-15-installing-cassandra-spark-stack.html
It'll be less work than writing a
, python + Cassandra
will be supported just in the next version, but I would like to be wrong...
Best regards,
Marcelo Valle.
2014-07-21 13:06 GMT-03:00 Jonathan Haddad j...@jonhaddad.com:
Hey Marcelo,
You should check out spark. It intelligently deals with a lot of the
issues you're
You don't need to specify tokens. The new node gets them automatically.
On Jul 22, 2014, at 7:03 PM, Kevin Burton bur...@spinn3r.com wrote:
So , shouldn't it be easy to rebalance a cluster?
I'm not super excited to type out 200 commands to move around individual
tokens.
I realize
This is incorrect. Network Topology w/ Vnodes will be fine, assuming
you've got RF= # of racks. For each token, replicas are chosen based
on the strategy. Essentially, you could have a wild imbalance in
token ownership, but it wouldn't matter because the replicas would be
distributed across the
* When I say wild imbalance, I do not mean all tokens on 1 node in the
cluster, I really should have said slightly imbalanced
On Tue, Aug 5, 2014 at 8:43 AM, Jonathan Haddad j...@jonhaddad.com wrote:
This is incorrect. Network Topology w/ Vnodes will be fine, assuming
you've got RF= # of racks
// due
to carefully chosen tokens vs randomly-generated token clash.
I don't see other options left.
Do you see other ones ?
Regards,
Dominique
-Message d'origine-
De : jonathan.had...@gmail.com [mailto:jonathan.had...@gmail.com] De la part
de Jonathan Haddad
Envoyé : mardi 5
It really doesn't need to be this complicated. You only need 1
session per application. It's thread safe and manages the connection
pool for you.
http://www.datastax.com/drivers/java/2.0/com/datastax/driver/core/Session.html
On Sat, Aug 9, 2014 at 1:29 PM, Kevin Burton bur...@spinn3r.com
Can you provide the code that you use to create the table? This feels like
code error rather than a database bug.
On Wed, Aug 13, 2014 at 1:26 PM, Kevin Burton bur...@spinn3r.com wrote:
2.0.5… I'm upgrading to 2.0.9 now just to rule this out….
I can give you the full CQL for the table, but
It sounds like your clocks are out of sync. Run ntpdate to fix your
clock then make sure you're running ntpd on every machine.
On Mon, Aug 25, 2014 at 1:25 PM, Sávio S. Teles de Oliveira
savio.te...@cuia.com.br wrote:
We're using cassandra 2.0.9 with datastax java cassandra driver 2.0.0 in a
This is actually a more correct response than mine, I made a few
assumptions that may or may not be true.
On Mon, Aug 25, 2014 at 1:31 PM, Robert Coli rc...@eventbrite.com wrote:
On Mon, Aug 25, 2014 at 1:25 PM, Sávio S. Teles de Oliveira
savio.te...@cuia.com.br wrote:
We're using cassandra
I believe shuffle has been removed recently. I do not recommend using
it for any reason.
If you really want to go vnodes, your only sane option is to add a new
DC that uses vnodes and switch to it.
The downside in the 2.0.x branch to using vnodes is that repairs take
N times as long, where N is
not work
at all.
On Mon, Sep 8, 2014 at 2:01 PM, Tim Heckman t...@pagerduty.com wrote:
On Mon, Sep 8, 2014 at 1:45 PM, Jonathan Haddad j...@jonhaddad.com wrote:
I believe shuffle has been removed recently. I do not recommend using
it for any reason.
We're still using the 1.2.x branch
Multi-dc is available in every version of Cassandra.
On Wed, Sep 10, 2014 at 9:21 AM, Oleg Ruchovets oruchov...@gmail.com wrote:
Thank you very much for the links.
Just to be sure: is this capability available for COMMUNITY ADDITION?
Thanks
Oleg.
On Wed, Sep 10, 2014 at 11:49 PM, Alain
Make sure your clocks are synced. If they aren't, the writetime that
determines the most recent value will be incorrect.
On Wed, Sep 17, 2014 at 11:58 AM, Robert Coli rc...@eventbrite.com wrote:
On Wed, Sep 17, 2014 at 11:55 AM, Sávio S. Teles de Oliveira
savio.te...@cuia.com.br wrote:
I'm
Keep in mind secondary indexes in cassandra are not there to improve
performance, or even really be used in a serious user facing manner.
Build and maintain your own view of the data, it'll be much faster.
On Thu, Sep 18, 2014 at 6:33 PM, Jay Patel pateljay3...@gmail.com wrote:
Hi there,
We
Depending on how you query (one or quorum) you might be able to do 1 rack at a
time (or az or whatever you've got) assuming your snitch is set up right
On Sep 19, 2014, at 11:30 AM, Kevin Burton bur...@spinn3r.com wrote:
This is great feedback…
I think it could actually be even easier
You'll need to provide a bit of information. To start, a query trace
from would be helpful.
http://www.datastax.com/documentation/cql/3.0/cql/cql_reference/tracing_r.html
(self promo) You may want to read over my blog post regarding
diagnosing problems in production. I've covered diagnosing
Are you using Cassandra 2.0 vnodes? If so, repair takes forever.
This problem is addressed in 2.1.
On Fri, Sep 26, 2014 at 9:52 AM, Gene Robichaux
gene.robich...@match.com wrote:
I am fairly new to Cassandra. We have a 9 node cluster, 5 in one DC and 4 in
another.
Running a repair on a
Subject: Re: Repair taking long time
Unfortunately DSE 4.5.0 is still on 2.0.x
-- Brice
On Fri, Sep 26, 2014 at 7:40 PM, Jonathan Haddad j...@jonhaddad.com wrote:
Are you using Cassandra 2.0 vnodes? If so, repair takes forever.
This problem is addressed in 2.1.
On Fri, Sep 26
: Brice Dutheil [mailto:brice.duth...@gmail.com]
Sent: Friday, September 26, 2014 12:47 PM
To: user@cassandra.apache.org
Subject: Re: Repair taking long time
Unfortunately DSE 4.5.0 is still on 2.0.x
-- Brice
On Fri, Sep 26, 2014 at 7:40 PM, Jonathan Haddad j...@jonhaddad.com wrote
First, did you run a query trace?
I recommend Al Tobey's pcstat util to determine if your files are in
the buffer cache: https://github.com/tobert/pcstat
On Wed, Oct 22, 2014 at 4:34 AM, Thomas Whiteway
thomas.white...@metaswitch.com wrote:
Hi,
I’m working on an application using a
No. Consider a scenario where you supply a timestamp a week in the future,
flush it to sstable, and then do a write, with the current timestamp. The
record in disk will have a timestamp greater than the one in the memtable.
On Wed, Oct 22, 2014 at 9:18 AM, Donald Smith
If the issue is related to I/O, you're going to want to determine if
you're saturated. Take a look at `iostat -dmx 1`, you'll see avgqu-sz
(queue size) and svctm, (service time).The higher those numbers
are, the most overwhelmed your disk is.
On Sun, Oct 26, 2014 at 12:01 PM, DuyHai Doan
For cqlengine we do quite a bit of write then read to ensure data was
written correctly, across 1.2, 2.0, and 2.1. For what it's worth,
I've never seen this issue come up. On a single node, Cassandra only
acks the write after it's been written into the memtable. So, you'd
expect to see the most
Personally I've found that using query timing + log aggregation on the
client side is more effective than trying to mess with tracing probability
in order to find a single query which has recently become a problem. I
recommend wrapping your session with something that can automatically log
the
In production?
On Mon Nov 10 2014 at 6:06:41 AM Spencer Brown lilspe...@gmail.com wrote:
I'm using /McFrazier/PhpBinaryCql/
On Mon, Nov 10, 2014 at 1:48 AM, Akshay Ballarpure
akshay.ballarp...@tcs.com wrote:
Hello,
I am working on PHP cassandra integration, please let me know which
With Cassandra you're going to want to model tables to meet the
requirements of your queries instead of like a relational database where
you build tables in 3NF then optimize after.
For your optimized select query, your table (with caveat, see below) could
start out as:
create table words (
Performance will be the same. There's no performance benefit to using
multiple keyspaces.
On Thu Nov 13 2014 at 8:42:40 AM Li, George guangxing...@pearson.com
wrote:
Hi,
we use Cassandra to store some association type of data. For example,
store user to course (course registrations)
with (potentially) two separate read
patterns, don't put them in the same table.
On Thu, Nov 13, 2014 at 11:08 AM, Jonathan Haddad j...@jonhaddad.com
wrote:
Performance will be the same. There's no performance benefit to using
multiple keyspaces.
On Thu Nov 13 2014 at 8:42:40 AM Li, George guangxing
If he deletes all the data with RF=1, won't he have data loss?
On Mon Nov 17 2014 at 5:14:23 PM Michael Shuler mich...@pbandjelly.org
wrote:
On 11/17/2014 02:04 PM, Alain Vandendorpe wrote:
Hey all,
For legacy reasons we're living with Cassandra 2.0.10 in an RF=1 setup.
This is being
I don't think DateTiered will help here, since there's no clustering key
defined. This is a pretty straightforward workload, I've done something
similar.
Are you overwriting the session on every request? Or just writing it once?
On Mon Dec 01 2014 at 6:45:14 AM Matt Brown m...@mattnworb.com
-
Hash: SHA1
The session will be written once at create time, and never modified
after that. Will that affect things?
Thank you
- -Phil
On 01.12.2014 15:58, Jonathan Haddad wrote:
I don't think DateTiered will help here, since there's no
clustering key defined. This is a pretty
I recommend reading through
https://issues.apache.org/jira/browse/CASSANDRA-8150 to get an idea of how
the JVM GC works and what you can do to tune it. Also good is Blake
Eggleston's writeup which can be found here:
http://blakeeggleston.com/cassandra-tuning-the-jvm-for-read-heavy-workloads.html
What's a ring cache?
FYI if you're using the DataStax CQL drivers they will automatically route
requests to the correct node.
On Sun Dec 07 2014 at 12:59:36 AM kong kongjiali...@gmail.com wrote:
Hi,
I'm doing stress test on Cassandra. And I learn that using ring cache can
improve the
If you've got a specific question I think someone can find a way to help,
but asking what can 8gb of heap give me is pretty abstract and
unanswerable.
Jon
On Sun Dec 07 2014 at 8:03:53 AM Philo Yang ud1...@gmail.com wrote:
2014-12-05 15:40 GMT+08:00 Jonathan Haddad j...@jonhaddad.com:
I recommend
I think he mentioned 100MB as the max size - planning for 1mb might make
your data model difficult to work.
On Sun Dec 07 2014 at 12:07:47 PM Kai Wang dep...@gmail.com wrote:
Thanks for the help. I wasn't clear how clustering column works. Coming
from Thrift experience, it took me a while to
you very much.
2014-12-08 1:28 GMT+08:00 Jonathan Haddad j...@jonhaddad.com:
What's a ring cache?
FYI if you're using the DataStax CQL drivers they will automatically
route requests to the correct node.
On Sun Dec 07 2014 at 12:59:36 AM kong kongjiali...@gmail.com wrote:
Hi,
I'm doing
Listen address needs the actual address, not the interface. This is best
accomplished by setting up proper hostnames for each machine (through DNS
or hosts file) and leaving listen_address blank, as it will pick the
external ip. Otherwise, you'll need to set the listen address to the IP of
the
results, I cannot use it in my case.
I will create a repo and send a link later, hope to get your kind help.
Thanks very much.
2014-12-08 14:28 GMT+08:00 Jonathan Haddad j...@jonhaddad.com:
I would really not recommend using thrift for anything at this point,
including your load tests. Take
You don't need a prime number of nodes in your ring, but it's not a bad
idea to it be a multiple of your RF when your cluster is small.
On Tue Dec 09 2014 at 8:29:35 AM Nate Yoder n...@whistle.com wrote:
Hi Ian,
Thanks for the suggestion but I had actually already done that prior to
the
...@whistle.com
On Tue, Dec 9, 2014 at 8:31 AM, Jonathan Haddad j...@jonhaddad.com wrote:
You don't need a prime number of nodes in your ring, but it's not a bad
idea to it be a multiple of your RF when your cluster is small.
On Tue Dec 09 2014 at 8:29:35 AM Nate Yoder n...@whistle.com wrote
Yes. It is, in general, a best practice to upgrade to the latest bug fix
release before doing an upgrade to the next point release.
On Tue Dec 09 2014 at 6:58:24 PM wyang wy...@v5.cn wrote:
I looked some upgrade documentations and am a little puzzled.
According to
I did a presentation on diagnosing performance problems in production at
the US Euro summits, in which I covered quite a few tools preventative
measures you should know when running a production cluster. You may find
it useful:
The really important thing to really take away from Ryan's original post is
that batches are not there for performance. The only case I consider
batches to be useful for is when you absolutely need to know that several
tables all get a mutation (via logged batches). The use case for this is
when
Hey Jens,
Unfortunately the output of the nodetool histograms changes between
versions. While I think your script is useful, it's likely to break
between versions. You might be interested to weigh in on the JIRA ticket
to make the nodetool output machine friendly:
from using server-side distribution of requests.
At a minimum the CQL spec should make a more clear statement of intent and
non-intent for BATCH.
-- Jack Krupansky
*From:* Jonathan Haddad j...@jonhaddad.com
*Sent:* Friday, December 12, 2014 12:58 PM
*To:* user@cassandra.apache.org ; Ryan
of batches but
without the coordinator overhead.
Can you post your benchmark code?
On Sat Dec 13 2014 at 6:10:36 AM Jonathan Haddad j...@jonhaddad.com wrote:
There are cases where it can. For instance, if you batch multiple
mutations to the same partition (and talk to a replica for that partition
rsvi...@datastax.com wrote:
Also..what happens when you turn on shuffle with token aware?
http://www.datastax.com/drivers/java/2.1/com/datastax/driver/core/policies/TokenAwarePolicy.html
On Sat, Dec 13, 2014 at 8:21 AM, Jonathan Haddad j...@jonhaddad.com
wrote:
To add to Ryan's (extremely
. If
reasonable sized batches are causing survivors, you're not far off from
falling over anyway.
On Sat, Dec 13, 2014 at 10:04 AM, Jonathan Haddad j...@jonhaddad.com
wrote:
One thing to keep in mind is the overhead of a batch goes up as the
number of servers increases. Talking to 3 is going
Not a problem - it's good to hash this stuff out and understand the
technical reasons why something works or doesn't work.
On Sat Dec 13 2014 at 10:07:10 AM Jonathan Haddad j...@jonhaddad.com wrote:
On Sat Dec 13 2014 at 10:00:16 AM Eric Stevens migh...@gmail.com wrote:
Isn't the net effect
13, 2014 at 11:07 AM, Jonathan Haddad j...@jonhaddad.com
wrote:
On Sat Dec 13 2014 at 10:00:16 AM Eric Stevens migh...@gmail.com wrote:
Isn't the net effect of coordination overhead incurred by batches
basically the same as the overhead incurred by RoundRobin or other
non-token-aware
I'd consider solving your root problem of people are starting and stopping
servers in prod accidentally instead of making Cassandra more difficult to
manage operationally.
On Thu Dec 18 2014 at 4:04:34 AM Ryan Svihla rsvi...@datastax.com wrote:
why auto_bootstrap=false? The documentation even
This topic comes up quite a bit. Enough, in fact, that I've done a 1 hour
webinar on the topic. I cover how the JVM GC works and things you need to
consider when tuning it for Cassandra.
https://www.youtube.com/watch?v=7B_w6YDYSwA
With your specific problem - full GC not reducing the old gen -
It may be more valuable to set up your test cluster as the same version,
and make sure your tokens are the same. then copy over your sstables.
you'll have an exact replica of prod you can test your upgrade process.
On Fri Dec 19 2014 at 11:04:58 AM Ryan Svihla rsvi...@datastax.com wrote:
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