I've observed that reducing fetch size results in better latency (isn't
that obvious :-)), tried from fetch size varying from 100 to 1, seeing
a lot of errors for 1. Haven't tried modifying the number of columns.
Let me start a new thread focused on fetch size.
On Wed, Apr 2, 2014 at 9:5
>From the doc : The fetch size controls how much resulting rows will be
retrieved simultaneously.
So, I guess it does not depend on the number of columns as such. As all the
columns for a key reside on the same node, I think it wouldn't matter much
whatever be the number of columns as long as we ha
Thanks Sourabh,
I've modelled my table as "studentID int, subjectID int, marks int, PRIMARY
KEY(studentID, subjectID)" as primarily I'll be querying using studentID
and sometime using studentID and subjectID.
I've tried driver 2.0.0 and its giving good results. Also using its auto
paging feature.
On Tue, Apr 1, 2014 at 3:24 PM, Redmumba wrote:
> Is it possible to have true "drop in" node replacements? For example, I
> have a cluster of 51 Cassandra nodes, 17 in each data center. I had one
> host go down on DC3, and when it came back up, it joined the ring, etc.,
> but was not receiving
On Mon, Mar 31, 2014 at 11:37 AM, Wayne Schroeder <
wschroe...@pinsightmedia.com> wrote:
> I found a lot of documentation about the read path for key and row caches,
> but I haven't found anything in regard to the write path. My app has the
> need to record a large quantity of very short lived te
On Tue, Apr 1, 2014 at 9:53 AM, Brian Tarbox wrote:
> I think another way of saying this is: "does HeapByteBuffer with
> pos=,lim=0,cap=0 sort prior to any other possible HeapByteBuffer?
Yes. However, if you use it as a slice finish, an empty ByteBuffer is
greater than any other value.
--
Ty
Is it possible to have true "drop in" node replacements? For example, I
have a cluster of 51 Cassandra nodes, 17 in each data center. I had one
host go down on DC3, and when it came back up, it joined the ring, etc.,
but was not receiving any data. Even after multiple restarts and forcing a
repa
- Were you running a mixed EL5/EL6 environment?
- What exact version of Cassandra were you upgrading from?
As for SE, you have to amass a bit of their magic points before you can
start to take more actions (tagging, down-voting, etc). Surprisingly good
at keeping down spam.
--
Patricia Gorla
@patr
I manually removed entries from System.peers.
The improvements can well be coincidental as various other apps were also
running on the same test bed.
On Tue, Apr 1, 2014 at 8:43 PM, Sylvain Lebresne wrote:
> What does "Did that" mean? Does that means "I upgraded to 2.0.6", or does
> that mean "
On Mon, Mar 31, 2014 at 9:13 PM, Apoorva Gaurav
wrote:
> Thanks Robert, Is there a workaround, as in our test setups we keep
> dropping and recreating tables.
>
Use unique keyspace (or table) names for each test? That's the approach
they're taking in 5202...
=Rob
On Tue, Apr 1, 2014 at 12:53 PM, Christof Roduner wrote:
> Will the following procedure work, or is there anything special we'll need
> to consider?
>
If you do not use auto_bootstrap:false, this will not work.
https://engineering.eventbrite.com/changing-the-ip-address-of-a-cassandra-node-with-a
Hi,
Due to some network renumbering, we will need to change the IP addresses
(and networks) of all nodes in our cluster.
Will the following procedure work, or is there anything special we'll
need to consider?
1. shut down all nodes
2. update "listen_address", "rpc_address", "seeds" in c
You would get UUID object from cassandra API. Then you may use
uuid.timestamp() to get time stamp for the same
-Vivek
On Tue, Apr 1, 2014 at 9:55 PM, Theo Hultberg wrote:
> no, there's no way. you should generate the TIMEUUID on the client side so
> that you have it.
>
> T#
>
>
> On Sat, Mar 2
no, there's no way. you should generate the TIMEUUID on the client side so
that you have it.
T#
On Sat, Mar 29, 2014 at 1:01 AM, Andy Atj2 wrote:
> I'm writing a Java client to a Cassandra db.
>
> One of the main primary keys is a timeuuid.
>
> I plan to do INSERTs using now() and have Cassand
Hi Kasper,
I'd suggest taking a look at Spark, Storm, or Samza (all are Apache
projects) for a possible approach. Depending on your needs and your
existing infrastructure, one of those may work better than others for you.
Steve
On Tue, Apr 1, 2014 at 2:51 AM, Kasper Petersen wrote:
> Hi,
>
What does "Did that" mean? Does that means "I upgraded to 2.0.6", or does
that mean "I manually removed entries from System.peers". If the latter,
I'd need more info on what you did exactly, what your peers table looked
like before and how they look like now: there is no reason deleting the
peers e
I have a composite key consisting of: (integer, bytes) and I have rows like:
(1,abc), (1,def), (2,abc), (2,def) and I want to find all rows with the
integer part = 2.
I need to create a startBeyondName using CompositeType.Builder class and am
wondering if specifying (2, Bytes.Empty) will sort corr
Did that and I actually see a significant reduction in write latency.
On Tue, Apr 1, 2014 at 5:35 PM, Sylvain Lebresne wrote:
> On Tue, Apr 1, 2014 at 1:49 PM, Apoorva Gaurav
> wrote:
>
>> Hello Sylvian,
>>
>> Queried system.peers on three live nodes and host4 is appearing on two of
>> these.
>
On Tue, Apr 1, 2014 at 1:49 PM, Apoorva Gaurav wrote:
> Hello Sylvian,
>
> Queried system.peers on three live nodes and host4 is appearing on two of
> these.
>
That's why the driver thinks they are still there. You're most probably
running into https://issues.apache.org/jira/browse/CASSANDRA-6053
Hello Sylvian,
Queried system.peers on three live nodes and host4 is appearing on two of
these.
On Tue, Apr 1, 2014 at 5:06 PM, Sylvain Lebresne wrote:
> On Tue, Apr 1, 2014 at 12:50 PM, Apoorva Gaurav > wrote:
>
>> Hello All,
>>
>> We had a 4 node cassandra 2.0.4 cluster ( lets call them hos
On Tue, Apr 1, 2014 at 12:50 PM, Apoorva Gaurav
wrote:
> Hello All,
>
> We had a 4 node cassandra 2.0.4 cluster ( lets call them host1, host2,
> host3 and host4), out of which we've removed one node (host4) using
> nodetool removenode command. Now using nodetool status or nodetool ring we
> no lo
Hello All,
We had a 4 node cassandra 2.0.4 cluster ( lets call them host1, host2,
host3 and host4), out of which we've removed one node (host4) using
nodetool removenode command. Now using nodetool status or nodetool ring we
no longer see host4. It's also not appearing in Datastax opscenter. But
Hi,
I have a large amount (can be >100 million) of (id uuid, score int) entries
in Cassandra. I need to, at regular intervals of lets say 30-60 minutes,
find the cut-off points for the score needed to be in the top 0.1%, 33% and
66% of all scores.
What would a good approach be to this problem?
A
Strange,
could you paste here output of:
$ grep -n exec ./bin/cassandra
On Mon, Mar 31, 2014 at 8:05 PM, Tim Dunphy wrote:
> Is SELinux enabled?
>
>
> Nope! It's disabled.
>
>
> On Mon, Mar 31, 2014 at 2:50 PM, Michael Shuler wrote:
>
>> Is SELinux enabled?
>>
>
>
>
> --
> GPG me!!
>
> gpg --
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