Cassandra is not very good at massive read/bulk read if you need to
retrieve and compute a large amount of data on multiple machines using
something like spark or hadoop (or you'll need to hack and process the
sstable directly, something which is not "natively" supported, you'll have
to hack your w
Hello all,
After updating to Cassandra 2.2.0 from 2.1.6 I am having SSL issues:
My JVM is java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)
Ubuntu 14.04.2 LTS is on all nodes, they are the same.
Below i
Robert, thanks for these references! We're not using DTCS, so 9056 and 8243
seem out, but I'll take a look at 9577 (also looked at the referenced
thread on this list, which seems to have some interesting data)
On Wed, Jul 22, 2015 at 5:33 PM, Robert Coli wrote:
> On Wed, Jul 22, 2015 at 2:55 PM,
I agreed Michael. I was generating stuff for it again, Looks like they had
the SSL stack changed. I came from 2.1.6 to 2.2.0. Thanks.
On Wed, Jul 22, 2015 at 5:45 PM, Michael Shuler
wrote:
> What version of Cassandra did you upgrade to 2.2.0 *from*?
>
> This would help with looking at config dif
On Wed, Jul 22, 2015 at 2:55 PM, Bryan Cheng wrote:
> nodetool still reports the node as being healthy, and it does respond to
> some local queries; however, the CPU is pegged at 100%. One common thread
> (heh) each time this happens is that there always seems to be one of more
> compaction threa
Problem: Log analytics.
Solutions:
1) Aggregating logs using Flume and storing the aggregations
into Cassandra. Spark reads data from Cassandra, make some computations
and write the results in distinct tables, still in Cassandra.
2) Aggregating logs using Flume to a sink, streamin
I faced something similar in past and the reason for nodes becoming
unresponsive intermittently was Long GC pauses. That's why I wanted to bring
this to your attention incase GC pause is a potential cause.
Sent from my iPhone
> On Jul 22, 2015, at 4:32 PM, Bryan Cheng wrote:
>
> Aiman,
>
> Y
I believe what he really wants is to be able to search for the x most recently
modified documents, i.e. without specifying the docID.
I don’t believe there is a ‘nice’ way of doing this in Cassandra by itself,
given it really favours key-value storage. Even having the date as the
partition key
What version of Cassandra did you upgrade to 2.2.0 *from*?
This would help with looking at config differences, changelogs, etc.
It seems you have some pretty clear SSL connection errors, according to
the logs, which at least helps with seeing why the nodes can't talk to
each other. I'm not ter
Thanks for the reply, Michael!
Yes, I did followed the upgrade nodes.
I am running Ubuntu Ubuntu 14.04.2 LTS on all and kernel 3.13.0-57-generic
on all.
I have 4 machines: .31, .32, .33 and .34. If I run nodetool status from .34
I now see all the others as DN the same happens if I log in from th
Aiman,
Your post made me look back at our data a bit. The most recent occurrence
of this incident was not preceded by any abnormal GC activity; however, the
previous occurrence (which took place a few days ago) did correspond to a
massive, order-of-magnitude increase in both ParNew and CMS collect
On 07/22/2015 04:45 PM, Carlos Scheidecker wrote:
I have a 4 node Cassandra system running on 4 Ubuntu boxes. After
updating to Cassandra 2.2.0 and keeping the same cassandra.yaml file,
the nodes cannot see each other.
What version did you upgrade from?
Usually, when upgrading, it is probably
All,
I have a 4 node Cassandra system running on 4 Ubuntu boxes. After updating
to Cassandra 2.2.0 and keeping the same cassandra.yaml file, the nodes
cannot see each other.
When I do a nodetool status it only reports as being up the machine where I
had issue the command.
In other words, all the
Hi Aiman,
We previously had issues with GC, but since upgrading to 2.1.7 things seem
a lot healthier.
We collect GC statistics through collectd via the garbage collector mbean,
ParNew GC's report sub 500ms collection time on average (I believe
accumulated per minute?) and CMS peaks at about 300ms
Hi Bryan
How's GC behaving on these boxes?
On Wed, Jul 22, 2015 at 2:55 PM, Bryan Cheng wrote:
> Hi there,
>
> Within our Cassandra cluster, we're observing, on occasion, one or two
> nodes at a time becoming partially unresponsive.
>
> We're running 2.1.7 across the entire cluster.
>
> nodetool
"No way to query recently-modified documents."
I don't follow why you say that. I mean, that was the point of the data
model suggestion I proposed. Maybe you could clarify.
I also wanted to mention that the new materialized view feature of
Cassandra 3.0 might handle this use case, including takin
Hi there,
Within our Cassandra cluster, we're observing, on occasion, one or two
nodes at a time becoming partially unresponsive.
We're running 2.1.7 across the entire cluster.
nodetool still reports the node as being healthy, and it does respond to
some local queries; however, the CPU is pegged
All,
I have a 4 node Cassandra system running on 4 Ubuntu boxes. After updating
to Cassandra 2.2.0 and keeping the same cassandra.yaml file, the nodes
cannot see each other.
When I do a nodetool status it only reports as being up the machine where I
had issue the command.
In other words, all the
Hello
I'm pleased to announce a Cassandra interpreter for Apache Zepplin. For
those who don't know, Apache Zeppelin[1] is a web-based notebook that
enables interactive data analytics. It is similar to IPython/Jupyter but is
JVM-based and its architecture is modular enough to allow various
back-en
Hello Anton,
You need to look into Datastax Entreprise (DSE) Offering. It integrates
Solr search which allows you to do searches like the one you mention. There
are also some opensource projects doing this kind of integration, so its up
to you.
And as Oded mentioned Cassandra really shines on key
Ah, so you your access pattern is to get all documents modified in a
particular date, right?
Then I think your approach is good, and to avoid duplication, why don't add
the docId as the first clustering column and remove the last_modified field
from it?
That way, your primary key would be PRIMARY
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