Thanks Daniel.
I am taking care to only expire the one column. There are other columns so
my row isn't completely deleted.
On Feb 24, 2014 11:37 PM, Daniel Shelepov dan...@timefork.com wrote:
For the case where you don't get the update, is your whole row removed
when TTL expires? If so,
Hi Steve,
I've considered this approach before and I'm partial to going this way
again.
The reason I haven't yet is the fact that I'm fairly confident that the
user patterns would have a lot more highscore list reads than setting of
highscores or adding friends. And most of the reads from
On Mon, Feb 24, 2014 at 8:50 PM, Theo Hultberg t...@iconara.net wrote:
I don't know if it's by design or if it's by oversight that the data types
aren't part of the binary protocol specification.
The honest answer is, no-one took the time to write that down properly and
include it in the
On Mon, Feb 24, 2014 at 11:32 PM, Tupshin Harper tups...@tupshin.comwrote:
Hi Clint,
That does appear to be an omission in CQL3. It would be possible to
simulate it by doing
BEGIN BATCH
UPDATE foo SET z = 10 WHERE x = 'a' AND y = 1 IF t= 2 AND z=10;
UPDATE foo SET t = 5,z=6 where x
You're running into https://issues.apache.org/jira/browse/CASSANDRA-6623.
It will be fixed in 2.0.6 but you can read the comments there for more
details.
On Tue, Feb 25, 2014 at 9:02 AM, J Robert Ray jrobert...@gmail.com wrote:
Thanks Daniel.
I am taking care to only expire the one column.
Sylvain,
On Tue, Feb 25, 2014 at 10:38 AM, Sylvain Lebresne sylv...@datastax.com wrote:
The honest answer is, no-one took the time to write that down properly and
include it in the spec. My small excuse for initially skipping it in the
spec is that the CQL data type encodings are really not
if I have time this week, I'll try to make a patch for the spec. Can't
promise I can get to it this week, but having come across this issue with
FluentCassandra, I'd like to help others avoid it.
On Tue, Feb 25, 2014 at 5:38 AM, Sylvain Lebresne sylv...@datastax.comwrote:
On Mon, Feb 24, 2014
Thanks again Michael. Those are the conclusions that I came to as well. For us
the window is small for possible duplicate users so I think we will have to do
the read before like you suggested. We will also have to be able to handle the
case where the duplicate users exist.
And thanks for the
I've been trying to do some simple data modeling and since we're currently
using Hector have been doing that modeling with cassandra-cli and running
into issues with CompositeType columns.
If I do a help set, I see:
The help for create column family shows:
create column family UseComposites
On Tue, Feb 25, 2014 at 12:50 PM, Peter Lin wool...@gmail.com wrote:
if I have time this week, I'll try to make a patch for the spec. Can't
promise I can get to it this week, but having come across this issue with
FluentCassandra, I'd like to help others avoid it.
So I may be running into an
Hi Kasper,
Given the 2 most common queries you mention (top 5 and 5 nearest), I will
assume that these are relative to the current user, so basically, they
would correspond to the top 5 among my friends, and the 5 closest to my own
top score. If that is your intention, I would suggest that you
thanks for the high level description of the format, I'll see if I can make
a stab at implementing support for custom types now.
and maybe I should take all of the reverse engineering I've done of the
type encoding and decoding and send a pull request for the protocol spec,
or write an appendix.
We deleted a row by mistake. Is there a way to somehow recover it?
Thanks
Running Cassandra 1.2.9 in AWS with a 12 host cluster, I am getting lots of
CorruptSSTableException in system.log on one of my hosts.
Is it possible to find out which SSTable(s) is/are corrupt?
I'm currently running nodetool scrub on the relevant host, but that
doesn't seem like an efficient way
On Tue, Feb 25, 2014 at 9:48 AM, Ike Walker ike.wal...@flite.com wrote:
Running Cassandra 1.2.9 in AWS with a 12 host cluster, I am getting lots
of CorruptSSTableException in system.log on one of my hosts.
Is it possible to find out which SSTable(s) is/are corrupt?
This feature has been
Thanks!
From: Jonathan Lacefield [mailto:jlacefi...@datastax.com]
Sent: Tuesday, February 25, 2014 11:17 AM
To: user@cassandra.apache.org
Subject: Re: Reverse a delete operation
A couple of options:
1) Do you have a snapshot? If so, you could recover form the snapshot?
2) Look in the
Hi John,
Since this is presumably for creation of users, which should have low
activity per user, you can use a combination of reads / writes to acquire a
lock on the username. I believe astyanax has a recipe with what you want
that works for C1.2 (although you might have to port it to CQL3 if
Please do. I too am working at a driver implementation and would be
delighted to be spared the research.
On Feb 25, 2014 11:29 AM, Theo Hultberg t...@iconara.net wrote:
thanks for the high level description of the format, I'll see if I can
make a stab at implementing support for custom types
I have some conditional insert/update operations that set quorum consistency.
I was using this with the 1.0 driver, back before the 2.0 features required the
2.0 driver. Now that I'm on the 2.0 driver, I have found the new
setSerialConsistencyLevel routine for statements. Multiple places it
Hello Daniel,
That is correct this is for user creation and collisions should be rare. Is
the astyanax recipe a distributed lock? I do not understand what you mean
by a combination of reads and writes?
We are using cql3 with the Datastax java driver
Thanks
*From: *Daniel Chia
*Sent: *Tuesday,
If you look at https://github.com/Netflix/astyanax/wiki , they have both
distributed lock, as well as a uniqueness constraint recipe.
Once you get past the thrift/astyanax style code, the underlying principle
is fairly simple which you should be able to port it to CQL3.
Thanks,
Daniel
On Tue,
Hey Ben,
It looks like you are trying to implement the Decimal type. You might
want to start with implementing the Integer type. The Decimal type
follows pretty easily from the Integer type.
For example:
i = unmarchalInteger(data[4:])
s = decInt(data[0:4])
out = inf.newDec(i, s)
On 02/24/2014
I was unable to get cassandra working with CentOS 5.X . I needed to use CentOS
6.2 or 6.4.
Don
From: Hari Rajendhran hari.rajendh...@tcs.com
Sent: Tuesday, February 25, 2014 2:34 AM
To: user@cassandra.apache.org
Subject: Supported Cassandra version for CentOS
Hi Tupshin,
Thanks for your help! Unfortunately in my case, I will need to do a
compare and set in which the compare is against a value in a dynamic column.
In general, I need to be able to do the following:
- Check whether a given value exists in a dynamic column
- If so, perform some
On Thu, Feb 13, 2014 at 10:37 AM, Christopher Wirt chris.w...@struq.comwrote:
TL;DR:
Has anyone ever tried using the new thrift 0.9 TThreadSelectorServer for
their thrift server?
I did today and have found it performs pretty well.
Is this something people would like to see in the C*
Hi Jonathan,
Thanks for the suggestion! I see a couple of problems with this approach:
1. I do not know a priori all of the family names (so I still would not
know what value to use for LIMIT).
2. The versions here are similar to timestamps, so one family may get
updated far more often than
Unfortunately there is no option to vote for a resolved ticket, but if
you can propose a better syntax that people agree on, you could probably
get some fresh traction on it.
-Tupshin
On Feb 25, 2014 7:20 PM, Clint Kelly clint.ke...@gmail.com wrote:
Hi Tupshin,
Thanks for your help!
Hi Clint,
What you are describing could actually be accomplished with the Thrift API
and a multiget_slice with a slicerange having a count of 1. Initially I was
thinking that this was an important feature gap between Thrift and CQL, and
was going to suggest that it should be implemented (possible
I failed to address the matter of not knowing the families in advance.
I can't really recommend any solution to that other than storing the list
of families in another structure that is readily queryable. I don't know
how many families you are thinking, but if it is in the millions or more,
You
Hi,
Thanks for the update.Could you please suggest the last possible apache
cassandra version supported for CentOS 5.5??
Best Regards
Hari Krishnan Rajendhran
Hadoop Admin
DESS-ABIM ,Chennai BIGDATA Galaxy
Tata Consultancy Services
Cell:- 9677985515
Mailto: hari.rajendh...@tcs.com
Website:
On Tue, Feb 25, 2014 at 10:04 PM, Wayne Schroeder
wschroe...@pinsightmedia.com wrote:
I have some conditional insert/update operations that set quorum
consistency. I was using this with the 1.0 driver, back before the 2.0
features required the 2.0 driver. Now that I'm on the 2.0 driver, I
Sorry to interfere again here but CASSANDRA-5633 will not be picked up
because pretty much everything it was set to fix is fixed by
CASSANDRA-6561, this is *not* a syntax problem anymore.
On Wed, Feb 26, 2014 at 3:18 AM, Tupshin Harper tups...@tupshin.com wrote:
Unfortunately there is no
Hey Colin,
On Tue, Feb 25, 2014 at 10:26 PM, Colin Blower cblo...@barracuda.com wrote:
It looks like you are trying to implement the Decimal type. You might want
to start with implementing the Integer type. The Decimal type follows pretty
easily from the Integer type.
For example:
i =
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