I have a requirement to execute CQL3 scripts through Gradle, do we have any
cassandra plugin for Gradle to do the same or is there any other way I can
execute CQL3 scripts during the build itself. Please suggest.
Dawood
Hi all,
Quick question
I currently am looking at a 4 node cluster and I have currently stopped all
writing to
Cassandra, with the reads continuing. I'm trying to understand the utilization
of memory within the JVM. nodetool info on each of the nodes shows them all
growing in footprint, 2 of
The Cassandra team is very pleased to announce the release of Apache
Cassandra
version 2.0.0. Cassandra 2.0.0 is a new major release that adds numerous
improvements[1,2], including:
- Lightweight transactions[4] that offers linearizable consistency.
- Experimental Triggers Support[5].
-
You're trying to use FromCqlColumn on a tuple that has been flattened. The
schema still thinks it's {title: chararray}, but the flattened tuple is now
two values. I don't know how to retrieve the data values in this case.
Your code will work correctly if you do this:
*values3 = FOREACH rows
On 09/01/2013 03:06 PM, Faraaz Sareshwala wrote:
Yes, that is correct.
The SerializingCacheProvider stores row cache contents off heap. I believe you
need JNA enabled for this though. Someone please correct me if I am wrong here.
The ConcurrentLinkedHashCacheProvider stores row cache contents
To get an accurate picture you should force a full GC on each node, the heap
utilization can be misleading since there can be a lot of things in the heap
with no strong references.
There is a number of factors that can lead to this. For a true comparison I
would recommend using jconsole and
You benefit from putting commit log on separate drive only if this drive is
an isolated spinning device. EC2 ephemeral is a virtual device, so I don't
think it makes sense to put commit log on a separated drive. I would build
raid0 from 4 drives and put everything their. But it would be
Jan,
The solution you gave works spot on, but there is one more requirement I
forgot to mention. Following is my table structure
CREATE TABLE file (
id text,
contenttype text,
createdby text,
createdtime timestamp,
description text,
name text,
parentid text,
version timestamp,
Does it actually OOM eventually? There will be a certain amount of object
allocation for reads (or anything) which will see the heap creep up until a GC,
but at ~500mb or so of a 8gb heap there is little reason for the JVM to do it
so it probably just ignores it to save processing. Even the
Ah. I was going by the upgrade recommendations in the NEWS.txt file in the
cassandra source tree, which didn't make mention of that version (1.0.11)
whatsoever. I didn't see any show-stoppers that would have prevented me from
going straight from 1.0.9 to 1.2.x.
create secondary index over parentid.
OR
make it part of clustering key
-Vivek
On Tue, Sep 3, 2013 at 10:42 PM, dawood abdullah
muhammed.daw...@gmail.comwrote:
Jan,
The solution you gave works spot on, but there is one more requirement I
forgot to mention. Following is my table structure
My bad. I did miss out to read latest version part.
-Vivek
On Tue, Sep 3, 2013 at 11:20 PM, dawood abdullah
muhammed.daw...@gmail.comwrote:
I have tried with both the options creating secondary index and also tried
adding parentid to primary key, but I am getting all the files with
parentid
I am trying to do the same thing, as in our project, we want to load the data
from Cassandra into Hadoop cluster, and SSTable is one obvious option, as you
can get the changed data since last batch loading directly from the SSTable
incremental backup files.
But, based on so far my research (I
On Mon, Sep 2, 2013 at 4:21 PM, Renat Gilfanov gren...@mail.ru wrote:
- Group 3 of storages into raid0 array, move data directory to the raid0,
and commit log - to the 4th left storage.
- As far as I understand, separation of commit log and data directory
should make performance better - but
I have tried with both the options creating secondary index and also tried
adding parentid to primary key, but I am getting all the files with
parentid 'yyy', what I want is the latest version of file with the
combination of parentid, fileid. Say below are the records inserted in the
file table:
Thanks Chris,
I have about 8 heap dumps that I have been looking at. I have been trying to
isolate
as to why I have be dumping heap, I've started by removing the apps that write
to
cassandra and eliminating work that would entail. I am left with just the apps
that
are reading the data and from
We are considering creating our own InputFormat for hadoop and running the
tasktrackers on every 3rd node(ie. RF=3) such that we cover all ranges. Our
M/R overhead appears to be 13 days vs. 12.5 hours on just reading SSTAbles
directly on our current data set.
I personally don't think parsing
try the following. -ml
-- put this in file and run using 'cqlsh -f file
DROP KEYSPACE latest;
CREATE KEYSPACE latest WITH replication = {
'class': 'SimpleStrategy',
'replication_factor' : 1
};
USE latest;
CREATE TABLE file (
parentid text, -- row_key, same for each version
id
create table file(id text , parentid text,contenttype text,version
timestamp, descr text, name text, PRIMARY KEY(id,version) ) WITH CLUSTERING
ORDER BY (version DESC);
insert into file (id, parentid, version, contenttype, descr, name) values
('f2', 'd1', '2011-03-06', 'pdf', 'f2 file', 'file1');
Thanks for everyone's work on this release!
-Jeremiah
On Sep 3, 2013, at 8:48 AM, Sylvain Lebresne sylv...@datastax.com wrote:
The Cassandra team is very pleased to announce the release of Apache Cassandra
version 2.0.0. Cassandra 2.0.0 is a new major release that adds numerous
Hello,
We have Cassandra cluster with 5 nodes hosted in the Amazon EC2, and I had to
restart two of them, so their IPs changed.
We use NetworkTopologyStrategy, so I simply updated IPs in the
cassandra-topology.properties file.
However, as I understood, old IPs remained somewhere in the
I have a similar use case but only need to update portion of the row. We
basically perform single write (with old and new columns) with very low value
of ttl for old columns.
From: jan.algermis...@nordsc.com
Subject: Update-Replace
Date: Fri, 30 Aug 2013 17:35:48 +0200
To:
I don't know of any. I would check the size of LIST. If it is taking long, it
could be just that disk read is taking long.
Date: Sat, 31 Aug 2013 16:35:22 -0300
Subject: Listblob retrieve performance
From: savio.te...@lupa.inf.ufg.br
To: user@cassandra.apache.org
I have a column family with
I use the technique described in my previous message to handle millions of
messages and their versions.
Actually, I use timeuuid's instead of timestamps, as they have more
'uniqueness'. Also I index my maps by a timeuuid that is the complement
(based on a future date) of a current timeuuid. Since
Baskar,
On 03.09.2013, at 23:11, Baskar Duraikannu baskar.duraika...@outlook.com
wrote:
I have a similar use case but only need to update portion of the row. We
basically perform single write (with old and new columns) with very low value
of ttl for old columns.
I found out that using
Hi All,
After enabling encryption on our Cassandra 1.2.8 nodes, we receiving the error
Connection error: TSocket read 0 bytes while attempting to use CQLsh to talk
to the ring. I've followed the docs over at
Thanks a lot for the quick reply,
Should I run the nodetool repair on all nodes before or after that?
Also, it's mentioned in the documentation that auto_bootstrap setting is
applied only to non-seed nodes. Currently I specified all nodes as seeds,
should I remove nodes with new IP from
The list is null.
2013/9/3 Baskar Duraikannu baskar.duraika...@outlook.com
I don't know of any. I would check the size of LIST. If it is taking long,
it could be just that disk read is taking long.
--
Date: Sat, 31 Aug 2013 16:35:22 -0300
Subject: Listblob
fyip.
-- Forwarded message --
From: Vivek Mishra vivek.mis...@impetus.co.in
Date: Wed, Sep 4, 2013 at 6:15 AM
Subject: {kundera-discuss} Kundera 2.7 released
To: kundera-disc...@googlegroups.com kundera-disc...@googlegroups.com
Hi All,
We are happy to announce the release of
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