Hi Tarun,
That documentation page is a bit ambiguous. My understanding of it is that:
* Cassandra guarantees that counters are updated consistently across the
cluster by doing background reads, that don't affect write latency.
* If you use a consistency level stricter than ONE, the same read is
Any pointers on this?.
In 2.1, when updating the counter with UNLOGGED batch using timestamp isn't
safe as other column update with consistency level (with timestamp counter
update can be idempotent? ).
Thanks
Ajay
On 09-Jul-2015 11:47 am, Ajay ajay.ga...@gmail.com wrote:
Hi,
What is the
' - you will
need intervention to correct it. So the key aspect is how much faster would be
a counter column family, and at what numbers do we start seing a difference.
Date: Tue, 25 Sep 2012 07:57:08 +0200
Subject: Re: Cassandra Counters
From: oleksandr.pet...@gmail.com
To: user
do
we start seing a difference.
--
Date: Tue, 25 Sep 2012 07:57:08 +0200
Subject: Re: Cassandra Counters
From: oleksandr.pet...@gmail.com
To: user@cassandra.apache.org
Maybe I'm missing the point, but counting in a standard column family
would be a little
the key aspect
is how much faster would be a counter column family, and at what numbers do
we start seing a difference.
--
Date: Tue, 25 Sep 2012 07:57:08 +0200
Subject: Re: Cassandra Counters
From: oleksandr.pet...@gmail.com
To: user@cassandra.apache.org
Maybe
seing a difference.
--
Date: Tue, 25 Sep 2012 07:57:08 +0200
Subject: Re: Cassandra Counters
From: oleksandr.pet...@gmail.com
To: user@cassandra.apache.org
Maybe I'm missing the point, but counting in a standard column family
would be a little overkill.
I
So general question, should I rely on Counters if I want 100% accuracy?
No.
Even not considering potential bugs, counters being not idempotent, if you
get a TimeoutException during a write (which can happen even in relatively
normal conditions), you won't know if the increment went in or not
@Sylvain
In a relatively untroubled cluster, even timed out writes go through,
provided no messages are dropped. Which you can monitor on cassandra
nodes. We have 100% consistency on our production servers as we don't
see messages being dropped on our servers.
Though as you mention, there would
@Sylvain and @Rohit: Thanks for your answers.
On Tue, Sep 25, 2012 at 2:27 PM, Sylvain Lebresne sylv...@datastax.comwrote:
So general question, should I rely on Counters if I want 100% accuracy?
No.
Even not considering potential bugs, counters being not idempotent, if
you get a
In a relatively untroubled cluster, even timed out writes go through,
provided no messages are dropped.
This all depends of your definition of untroubled cluster, but to be
clear, in a cluster where a node dies (which for Cassandra is not
considered abnormal and will happen to everyone no
Hi folks,
I looked at my mail below, and Im rambling a bit, so Ill try to re-state my
queries pointwise.
a) what are the performance tradeoffs on reads writes between creating a
standard column family and manually doing the counts by a lookup on a key,
versus using counters.
b) whats the
IMO
You would use Cassandra Counters (or other variation of distributed
counting) in case of having determined that a centralized version of
counting is not going to work.
You'd determine the non_feasibility of centralized counting by figuring the
speed at which you need to sustain writes and
Thanks Milind,
Has anyone implemented counting in a standard col family in cassandra, when you
can have increments and decrements to the count. Any comparisons in performance
to using counter column families?
Regards,Roshni
Date: Mon, 24 Sep 2012 11:02:51 -0700
Subject: RE: Cassandra Counters
in performance to using counter column families?
Regards,
Roshni
--
Date: Mon, 24 Sep 2012 11:02:51 -0700
Subject: RE: Cassandra Counters
From: milindpar...@gmail.com
To: user@cassandra.apache.org
IMO
You would use Cassandra Counters (or other variation
Hello,
Thanks for your answer. See my reply in-line.
On 11/04/2011 01:46 PM, Amit Chavan wrote:
Answers inline.
On Fri, Nov 4, 2011 at 4:59 PM, Vlad Paiu vladp...@opensips.org
mailto:vladp...@opensips.org wrote:
Hello,
I'm a new user of Cassandra and I think it's great.
On Mon, Nov 7, 2011 at 10:12 AM, Vlad Paiu vladp...@opensips.org wrote:
Hello,
Thanks for your answer. See my reply in-line.
On 11/04/2011 01:46 PM, Amit Chavan wrote:
Answers inline.
On Fri, Nov 4, 2011 at 4:59 PM, Vlad Paiu vladp...@opensips.org wrote:
Hello,
I'm a new user of
Answers inline.
On Fri, Nov 4, 2011 at 4:59 PM, Vlad Paiu vladp...@opensips.org wrote:
Hello,
I'm a new user of Cassandra and I think it's great.
Still, while developing my APP using Cassandra, I got stuck with some
things and I'm not really sure that Cassandra can handle them at the
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