Righto !
Will do a JIRA report..
Many thanks
Andy
On 16 Jul 2013, at 18:50, Robert Coli
mailto:rc...@eventbrite.com>>
wrote:
On Tue, Jul 16, 2013 at 1:16 AM, Andrew Cobley
mailto:a.e.cob...@dundee.ac.uk>> wrote:
I'm setting up a new test cluster using 2.0.0-beta1
I don't think setting gc_grace_seconds to an hour is going to do what you'd
expect. After gc_grace_seconds, if you haven't run a repair within that
hour, the data you deleted will seem to have been undeleted.
Someone correct me if I'm wrong, but in order to order to completely delete
data and rega
nclude the keyspace as part of your query, you'll get it weighted by
the RF of that keyspace. I believe the same logic applies for nodetool
status.
Andrew
On Thu, Jul 11, 2013 at 12:58 PM, Jason Tyler wrote:
> Thanks Rob! I was able to confirm with getendpoints.
>
> Cheers
(not replicate on write) for counters involves a read, so
that explains the high disk I/O, but for that I'd expect to see many write
requests pending (which we see a bit), but not replicate on writes backing
up. What am I missing?
Andrew
On Wed, Jul 3, 2013 at 1:03 PM, Robert Coli wrote:
2. I'm assuming in our case the cause is incrementing counters because disk
reads are part of the write path for counters and are not for appending
columns to a row. Does that logic make sense?
Thanks in advance,
Andrew
According to Jonathan Ellis talk at Cassandra 13 it does use Paxos:
http://www.youtube.com/watch?v=PcUpPR4nSr4&list=PLqcm6qE9lgKJzVvwHprow9h7KMpb5hcUU
http://www.slideshare.net/jbellis/cassandra-summit-2013-keynote
Andy
On 1 Jul 2013, at 19:40, Francisco Andrades Grassi
mailto:bigjoc...@gmail.
f the
behavior can be duplicated.
Andrew
On Tue, Jun 25, 2013 at 2:18 PM, Robert Coli wrote:
> On Mon, Jun 24, 2013 at 6:42 PM, Josh Dzielak wrote:
> > There is only 1 thread running this sequence, and consistency levels are
> set
> > to ALL. The behavior is fairly repeatable - the
ance
with varying sstable sizes.
Thanks in advance!
Andrew
e on write should normally always be turned on, or the change
>> will only be recorded on one node. Replicate on write is asynchronous
>> with respect to the request and doesn't affect consistency level at
>> all.
>>
>>
>> On Wed, May 29, 2013 at 7:32 P
ess of
what you actually set it to (and for good reason).
On Wed, May 29, 2013 at 9:47 AM, Andrew Bialecki
wrote:
> Quick question about counter columns. In looking at the replicate_on_write
> setting, assuming you go with the default of "true", my understanding is it
> writes th
Quick question about counter columns. In looking at the replicate_on_write
setting, assuming you go with the default of "true", my understanding is it
writes the increment to all replicas on any increment.
If that's the case, doesn't that mean there's no point in using CL.QUORUM
for reads because
-
> Aaron Morton
> Freelance Cassandra Consultant
> New Zealand
>
> @aaronmorton
> http://www.thelastpickle.com
>
> On 24/03/2013, at 9:41 AM, Andrew Bialecki
> wrote:
>
> Just curious if anyone has any thoughts on something we've observed in a
ng
and shutting down nodes extremely easy.
Cheers,
Andrew
I've got a 3 node cluster in 1.2.2 and just bootstrapped a new node into
it. For each of the existing nodes, I had num tokens set to 256 and for the
new node I also had it set to 256, however after bootstrapping into the
cluster, "nodetool status " for my main keyspace which has RF=2
now reports:
Does this help you ?
https://github.com/acobley/CassandraStartup
it was built for Raspbian, but might help you.
Andy
On 19 Mar 2013, at 11:10, Roshan
mailto:codeva...@gmail.com>> wrote:
Hi
I want to start the cassandra as a service. At the moment it is starting as
a background task.
Cassand
forceFlush requested but everything is
clean in Standard1
INFO [RMI TCP Connection(2)-10.116.111.143] 2013-03-09 03:54:33,510
StorageService.java (line 774) DRAINED
On Fri, Mar 8, 2013 at 10:36 PM, Andrew Bialecki
wrote:
> Hey all,
>
> We're getting ready to upgrade our cluster to 1.
Hi all,\
According to
http://www.datastax.com/dev/blog/whats-new-in-cassandra-1-0-windows-service-new-cql-clients-and-more
running cassandra.bat install should make cassandra run on a service on a
windows box. However I'm getting the following when I try:
C:\apache-cassandra-1.2.1\bin>cassandr
Thanks, I'll take a look at that too.
I also found that "nodetool info" gives some information as well. For
instance, here's what one node reads:
Key Cache: size 104857584 (bytes), capacity 104857584 (bytes), 15085408
hits, 17336031 requests, 0.870 recent hit rate, 14400 save period in
seconds.
letes? Anything
drawbacks to not running it?
Thanks,
Andrew
nged the defaults there, so the key
cache setting in cassandra.yaml is still blank.
Thanks for any help and happy holidays,
Andrew
Thanks, extremely helpful. The key bit was I wasn't flushing the old
Keyspace before re-running the stress test, so I was stuck at RF = 1 from a
previous run despite passing RF = 2 to the stress tool.
On Sun, Oct 28, 2012 at 2:49 AM, Peter Schuller wrote:
> > Operation [158320] retried 10 times
RF and CL are you using?
>
>
> On 2012/10/28, at 13:13, Andrew Bialecki
> wrote:
>
> Hey everyone,
>
> I'm trying to simulate what happens when a node goes down to make sure my
> cluster can gracefully handle node failures. For my setup I have a 3 node
> cluster runni
writes failing even after a retry? It might be the stress client
doesn't pool connections (I took a quick look, but might've not looked
deeply enough), however I also tried only specifying the first two server
nodes and then downing the third with the same failure.
Thanks in advance.
Andrew
unsubscribe
ot allocate
memory
at java.lang.UNIXProcess.(UNIXProcess.java:148)
at java.lang.ProcessImpl.start(ProcessImpl.java:65)
at java.lang.ProcessBuilder.start(ProcessBuilder.java:453)
... 12 more
Dr. Andrew Perella
CTO / Chief Software Architect
Eutechnyx Limited. Metro Centre
Sorry - just realised this is now a parameter on the CFDef
From: Dr. Andrew Perella [mailto:a...@eutechnyx.com]
Sent: 26 November 2010 14:17
To: user@cassandra.apache.org
Subject: RE: Newbie question on Cassandra mem usage
How can I set these per CF when I create them dynamically?
Regards
How can I set these per CF when I create them dynamically?
Regards,
Andrew
From: Aaron Morton [mailto:aa...@thelastpickle.com]
Sent: 22 November 2010 21:40
To: user@cassandra.apache.org
Subject: Re: Newbie question on Cassandra mem usage
They are memtable_throughput_in_mb
Actually it turns out there is a submitted patch for this already from January
2009 but it was never accepted due to a complaint about an unnecessary cast! I
have modified and resubmitted the patch.
-Original Message-
From: Dr. Andrew Perella [mailto:a...@eutechnyx.com]
Sent: 18
project?
On Thu, Nov 18, 2010 at 2:13 PM, Dr. Andrew Perella wrote:
> UPDATE: Solved
>
>
>
> After digging deeper I realised that I had patched fastbinary incorrectly
> for compiling under visual studio on windows and was left with the wrong
> endian define.
>
> As the app of
.
Regards,
Andrew
From: Tyler Hobbs [mailto:ty...@riptano.com]
Sent: 18 November 2010 00:00
To: user@cassandra.apache.org
Subject: Re: casssandra 0.7beta3, pycassa and windows client timestamps
No, there's no client side caching.
Assuming you're using insert(), could you capture both of the
et it to go wrong.
Thankyou for all your help, I am sure this issue will return so I will
hopefully come back with more info.
Is there something in the log that lets us know the insert has worked? ie the
timestamp check has passed?
Regards,
Andrew
From: Tyler Hobbs [mailto:ty...@riptan
lient timestamps
Well, the write appears to be succeeding, and since you say this works on
Linux, it sounds like a client side problem.
Are you using pycassa or are you dealing with raw Thrift. If pycassa, what
version?
- Tyler
On Wed, Nov 17, 2010 at 5:02 PM, Dr. Andrew Perella
mai
22:59:42,937 quorumResponseHandler: 0 ms.
From: Tyler Hobbs [mailto:ty...@riptano.com]
Sent: 17 November 2010 22:56
To: user@cassandra.apache.org
Subject: Re: casssandra 0.7beta3, pycassa and windows client timestamps
Can you turn on debug logging on Cassandra (change INFO to debug in
c
ultinode cluster or just one instance of Cassandra?
- Tyler
On Wed, Nov 17, 2010 at 4:30 PM, Dr. Andrew Perella
mailto:a...@eutechnyx.com>> wrote:
Miliseconds - but that's not the problem - I can wait 10 minutes and still not
get the value updated! Other times I can update many t
t: Re: casssandra 0.7beta3, pycassa and windows client timestamps
What resolution does time.time() give you in Windows?
- Tyler
On Wed, Nov 17, 2010 at 4:23 PM, Dr. Andrew Perella
mailto:a...@eutechnyx.com>> wrote:
I have encountered a strange problem with values not being written to Cassandra
ver
away.
Has anyone seen anything like this or will I need to delve deeper into thift?
FYI I am using pythons int(time.time()*1e6) as a timestamp
Best Regards,
Andrew
This e-mail is confidential and may be privileged. It may be read, copied and
used only by the intended recipient. No communication
Nov 9, 2010 at 12:07 PM, Dr. Andrew Perella
mailto:a...@eutechnyx.com>> wrote:
> Thanks Jonathan,
> So it looks like the python bindings are using a deprecated non framed
> protocol. Leaving that problem aside for a moment I changed the server to
> work in non framed mode an
create one? I
had assumed Cassandra would commonly be used from python so would be able to
jump in and use it.
Cheers,
Andrew
-Original Message-
From: Jonathan Ellis [mailto:jbel...@gmail.com]
Sent: 09 November 2010 18:20
To: user
Subject: Re: Cassandra - python communication problem
nown result");
thrift.Thrift.TApplicationException: describe_keyspace failed: unknown result
Any ideas?
Cheers,
Andrew
-Original Message-
From: Jonathan Ellis [mailto:jbel...@gmail.com]
Sent: 09 November 2010 17:56
To: user
Subject: Re: Cassandra - python communication problem
You're
0 bytes
I get similar errors for all queries.
I cannot work out what is going wrong here. Can anyone help? (I need many of
the functions only added in 0.7)
Best Regards,
Andrew
This e-mail is confidential and may be privileged. It may be read, copied and
used only by the intended recipient. N
unsubscribe
yaw gmail.com> writes:
>
> Hi all, connecting to a cluster with cassandra-cli and trying a
> describe command,
> I obtain a "missing K_TABLE" message
> Is this a real issue?
I would chock this one up to a mix of user error and cryptic
CLI message.
describe command is describe keyspace
MySQL, so my next
thing would be to try RAID with Cassandra.
Also, another theory is that CommitLogSync in batch mode might allow me to
effectively rate limit writing so that I don't overflow memory.
Thoughts?
- Andrew
s of the
data, which means less data to move after node failure).
- Andrew
Is your IO under heavy load? If it is, that may be the cause, otherwise I'm
not sure what causes significant lag. On Linux I like to use "iostat -tx 10"
to check IO.
- Andrew
On Sun, Jul 4, 2010 at 4:04 AM, David Boxenhorn wrote:
> Thank you very much! I now understand
. At first glance it
seems like concepts should be independent of one another.
- Andrew
On Sun, Jul 4, 2010 at 3:34 AM, David Boxenhorn wrote:
> As I understand it, when you write to Cassandra, you are assured that, if
> successful, the new data has been written to a log file - so that
ID into the row and then immediately read it back to confirm that they
are the owner of the job.
Any ideas here? Has anyone come up with a nice implementation? Is
Cassandra not well suited for queue-like tasks?
Thanks,
Andrew
is greatly appreciated.
Thanks,
Andrew
MongoDB encourages you to define your schema in your application code by
using mapping classes. This logically infers that it makes no sense to
define the schema twice, in the database and in your application code.
On Fri, May 14, 2010 at 3:48 AM, Steve Lihn wrote:
> What is changing? A more fle
Hi,
>From my understanding, Cassandra entities are indexed on only one key, so
this can be a problem if you are searching for example by two values such as
if you are storing an entity with a x,y then wish to search for entities in
a box ie x>5 and x<10 and y>5 and y<10. MongoDB can do this, Cassa
Please create a new term word if the existing terms are misleading, if its
not a file system then its not good to call it a file system.
On Thu, May 6, 2010 at 3:50 PM, Torsten Curdt wrote:
> +1 on all of that
>
> On Thu, May 6, 2010 at 09:04, David Boxenhorn wrote:
> > That would be a good tim
http://www.youtube.com/watch?v=eaCCkfjPm0o
3.30 song begins
4.00 starfish loves you and Cassandra loves you!
On Thu, May 6, 2010 at 11:03 AM, Denis Haskin wrote:
> i can haz hints pleez?
>
> On Wed, May 5, 2010 at 9:28 PM, philip andrew
> wrote:
> > Starfish loves you.
>
Starfish loves you.
On Wed, May 5, 2010 at 1:16 PM, David Strauss wrote:
> On 2010-05-05 04:50, Denis Haskin wrote:
> > I've been reading everything I can get my hands on about Cassandra and
> > it sounds like a possibly very good framework for our data needs; I'm
> > about to take the plunge and
When making rough calculations regarding the potential size of a single row,
what sort of overhead is there to consider? In other words, for a particular
column, what else is there to consider in terms of memory consumption besides
the value itself?
On Apr 29, 2010, at 8:49 AM, Mark Jones wrot
What is the upper limit on the number of super columns? Is it pretty much the
same as for columns in general?
On Apr 28, 2010, at 10:09 PM, Schubert Zhang wrote:
> key : stock ID, e.g. AAPL+year
> column family: closting price and valume, tow CFs.
> colum name: timestamp LongType
>
> AAPL+201
and the best way to model this, we would
be adding 3.9 billion rows per year (assuming 125 Hz @ 24/7). However, I can't
really think of a better way to model this... So, am I thinking about this all
wrong or am I on the right track?
Thanks,
Andrew
Hi,
Lets say I wanted to store 2 dimensional data in the database, each object
has a X and Y location in a very large space.
I want to query Cassandra for all objects within a rectangle.
My understanding is that my objects can only be indexed by one key, one key
for each single object in my tabl
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