Got it, thanks
2010/4/13 Peter Schüller :
>> FYI, G1 has been in 1.6 since u14.
>
> Yes, but (last time I checked) in a considerably older form. The JDK
> 1.7 one is more mature.
>
> --
> / Peter Schuller aka scode
>
> FYI, G1 has been in 1.6 since u14.
Yes, but (last time I checked) in a considerably older form. The JDK
1.7 one is more mature.
--
/ Peter Schuller aka scode
FYI, G1 has been in 1.6 since u14.
2010/4/13 Peter Schüller :
>> I'm working on getting our latency as consistent as possible, and the gc
>> likes to kick off 60+ms periods of unavailability for a node, which for my
>> application leads to a reasonable number of timed out requests. Outside of
>
Hi,
Can anyone please list steps to install and run cassandra in centos.
It can help me to follow and check where i missed and run correctly.
Also, if i wanted to insert some data programmatically, where i need to do
place the code in Fauna.Can anyone help me on this?
On Mon, Apr 12, 2010 at 10:3
> I'm working on getting our latency as consistent as possible, and the gc
> likes to kick off 60+ms periods of unavailability for a node, which for my
> application leads to a reasonable number of timed out requests. Outside of
> the gc event, we get good responses.
>
> I'm happy with reduced t
Cheers!
From: Donyee
Sent: Tuesday, April 13, 2010 11:10 PM
To: user@cassandra.apache.org
Subject: Re: [RELEASE] 0.6.0
Great!
2010/4/13 Eric Evans
I'm pleased to announce the official release of Apache Cassandra 0.6.0,
(aka The Best Evar). Get yours now from the usual place[1], and a
> I've implemented this with MySQL before, and it worked extremely well
> (miles beyond mysqldump or mysqlhotcopy). On a given node, you sacrifice a
> short period of availability (less than 0.5 seconds) to get a full,
> consistent snapshot of your EBS volume that can be sent off to S3 in the
> ba
On Tue, Apr 13, 2010 at 5:26 PM, Rob Coli wrote:
> On 4/13/10 5:04 PM, Paul Prescod wrote:
>>
>> Am I correct in my understanding that the unit of caching (and
>> fetching from disk?) is a full row?
>
> Cassandra has both a Key and a Row cache. Unfortunately there appears to be
> no current wiki d
On 4/13/10 5:04 PM, Paul Prescod wrote:
Am I correct in my understanding that the unit of caching (and
fetching from disk?) is a full row?
Cassandra has both a Key and a Row cache. Unfortunately there appears to
be no current wiki doc describing them. If you are looking into the
topic, wiki u
Am I correct in my understanding that the unit of caching (and
fetching from disk?) is a full row?
cf = cacheRow(filter.key);
Also, that the thing that is cached is just the top level columns?
cached = getTopLevelColumns(new IdentityQueryFilter(key,
new QueryPath(colu
On EC2, it is common and recommended (
http://developer.amazonwebservices.com/connect/entry.jspa?categoryID=100&externalID=1663)
to use XFS's freeze/thaw functionality to create near-online snapshots of an
EBS volume for MySQL snapshots.
"Besides being a stable, modern, high performance, journalin
Any idea how in an app can I know how many, for example, news (records/rows)
I have?
On Tue, Apr 13, 2010 at 4:59 PM, Eric Evans wrote:
> On Tue, 2010-04-13 at 16:56 -0600, Christian Torres wrote:
> > Sorry! Can I from Cassandra Cli get all the rows?
>
> No, sorry.
>
> --
> Eric Evans
> eev...@r
I notice that the documentation on the read path is quite compressed
on this page:
* http://wiki.apache.org/cassandra/ArchitectureOverview
What is the best documentation of the read path? I'm also curious
about the granularity and policies around caching.
Paul Prescod
On Tue, 2010-04-13 at 16:56 -0600, Christian Torres wrote:
> Sorry! Can I from Cassandra Cli get all the rows?
No, sorry.
--
Eric Evans
eev...@rackspace.com
Sorry! Can I from Cassandra Cli get all the rows?
On Tue, Apr 13, 2010 at 4:47 PM, Christian Torres wrote:
> It's true! Thx. It works
>
>
> On Tue, Apr 13, 2010 at 4:40 PM, Tupshin Harper wrote:
>
>> On 4/13/2010 3:39 PM, Christian Torres wrote:
>>
>> Maybe some other people have asked this but
Which version of the JVM are you using? Recent builds (u18, u19) have
significantly improved GC.
On Tue, Apr 13, 2010 at 3:51 PM, Daniel Kluesing wrote:
> Has anyone done any tuning on the jvm gc options or are the options included
> in bin/cassandra.in.sh basically the best choice?
>
> I'm wor
Has anyone done any tuning on the jvm gc options or are the options included in
bin/cassandra.in.sh basically the best choice?
I'm working on getting our latency as consistent as possible, and the gc likes
to kick off 60+ms periods of unavailability for a node, which for my
application leads t
It's true! Thx. It works
On Tue, Apr 13, 2010 at 4:40 PM, Tupshin Harper wrote:
> On 4/13/2010 3:39 PM, Christian Torres wrote:
>
> Maybe some other people have asked this but I'm testing php to use with
> cassandra and the error the example here gave me was:
>
> [link] http://wiki.apache.org/
On 4/13/2010 3:39 PM, Christian Torres wrote:
Maybe some other people have asked this but I'm testing php to use
with cassandra and the error the example here gave me was:
[link] http://wiki.apache.org/cassandra/ThriftExamples03
*Bad type in structure.*
I think is because I'm using the new ve
Maybe some other people have asked this but I'm testing php to use with
cassandra and the error the example here gave me was:
[link] http://wiki.apache.org/cassandra/ThriftExamples03
*Bad type in structure.*
I think is because I'm using the new version 0.6
--
Christian Torres * Desarrollador W
Got it, thanks!
On Tue, Apr 13, 2010 at 3:12 PM, Jonathan Ellis wrote:
> you have three options
>
> (a) connect with jconsole or another jmx client and invoke flush that way
> (b) run org.apache.cassandra.tools.NodeCmd manually
> (b) write a bat file for NodeCmd like the nodetool shell script in
you have three options
(a) connect with jconsole or another jmx client and invoke flush that way
(b) run org.apache.cassandra.tools.NodeCmd manually
(b) write a bat file for NodeCmd like the nodetool shell script in bin/
On Tue, Apr 13, 2010 at 5:08 PM, Sonny Heer wrote:
> Is there any way to ru
Is there any way to run a keyspace flush on a windows box?
nevermind. I figured out what the problem was. I was not putting the
column inside a ColumnOrSuperColumn container.
Lee Parker
l...@spredfast.com
[image: Spredfast]
On Tue, Apr 13, 2010 at 4:19 PM, Lee Parker wrote:
> I upgraded my dev environment to 0.6.0 today in expectation of upgrading
>
I upgraded my dev environment to 0.6.0 today in expectation of upgrading our
prod environment soon. I am trying to rewrite some of our code to use
batch_mutate with the Thrift PHP library directly. I'm not getting any
result back, not even an exception or failure message, but the data is never
sh
Awesome. This is greatly appreciated.
Lee Parker
l...@spredfast.com
[image: Spredfast]
On Tue, Apr 13, 2010 at 3:54 PM, Eric Evans wrote:
> On Tue, 2010-04-13 at 12:12 -0500, Eric Evans wrote:
> > > Any chance of an updated debian package?
> >
> > Yes. RSN.
>
> I leaned into it. An updated pac
On Tue, Apr 13, 2010 at 10:54:51AM -0500, Jonathan Ellis wrote:
> On Sat, Apr 10, 2010 at 2:24 PM, Anthony Molinaro
> wrote:
> > This is sort of a pre-emptive question as the compaction I'm doing hasn't
> > failed yet but I expect it to any time now. I have a cluster which has been
> > storing
On Tue, 2010-04-13 at 12:12 -0500, Eric Evans wrote:
> > Any chance of an updated debian package?
>
> Yes. RSN.
I leaned into it. An updated package has been uploaded to the Cassandra
repo (see: http://wiki.apache.org/cassandra/DebianPackaging).
Enjoy.
--
Eric Evans
eev...@rackspace.com
On Tue, Apr 13, 2010 at 1:55 PM, Paul Prescod wrote:
> What do you mean by "bad practice"? The document above implies that it
> is nearly impossible. It implies that you will have between 1 and 4
> SSTables. Does the administrator have a choice in this matter?
You can tune the 4 number via JMX (p
On Tue, Apr 13, 2010 at 12:00 PM, Benjamin Black wrote:
>> I am probably being totally naive, but is the answer to the question
>> "worst iops on read" just:
>>
>> 3 reads per SSTable * 4 SStables * ReplicationFactor ?
>>
>> = 3 * 4 * 3 = 36?
>>
>
> Why does RF enter this?
A simplistic model for
Ok, will add it.
I originally tried to build upon both lazyboy and pycassa, but started
from scratch when the abstraction didn't feel right both times.
The only part of pycassa that I use now is the socket/reconnect code,
which does exactly what's needed for now. I'm however planning to
switch it
On Tue, Apr 13, 2010 at 11:55 AM, Paul Prescod wrote:
>
> What do you mean by "bad practice"? The document above implies that it
> is nearly impossible. It implies that you will have between 1 and 4
> SSTables. Does the administrator have a choice in this matter?
>
Hey, I am arguing the proposed
On Tue, Apr 13, 2010 at 11:52 AM, Scott White wrote:
>
>...
>
> Agreed.
Kind of sorry to see Scott White and Benjamin Black being in
agreementbut I guess that's the way yin and yang works. Opposition
is illusory in any case.
Paul Prescod
On Tue, Apr 13, 2010 at 11:31 AM, Benjamin Black wrote:
> ...
> How frequently do you want to write SSTables? How much memory do you
> want Memtables to consume? How long do you want to wait between
> Memtable flushes? There is an entire wiki page on Memtable tuning:
> http://wiki.apache.org/c
You should add it to http://wiki.apache.org/cassandra/ClientOptions
(click Login to edit).
Does it use pycassa under the hood, out of curiosity?
On Tue, Apr 13, 2010 at 1:50 PM, Paul Bohm wrote:
> Hey everyone,
>
> I've lately been working on Tragedy, a (yet another) Cassandra object
> abstracti
> Do you understand you are assuming there have been no compactions,
> which would be extremely bad practice given this number of SSTables?
> A major compaction, as would be best practice given this volume, would
> result in 1 SSTable per CF per node. One. Similarly, you are
> assuming the update
Hey everyone,
I've lately been working on Tragedy, a (yet another) Cassandra object
abstraction for Python. While there clearly is no shortage of high
quality Python Cassandra libraries out there already, Tragedy has a
different enough design that you might still find it useful.
The README contai
On Tue, Apr 13, 2010 at 11:31 AM, Paul Prescod wrote:
> I am just checking math, not model.
>
> On Tue, Apr 13, 2010 at 10:48 AM, Time Less wrote:
>
>>
>> numRowsOnNode = 10B / 20 = 500M.
>
> 50 million
>
10B / 20 is 500M. The rest of the analysis from our pseudonymous
friend remains faulty.
On Tue, Apr 13, 2010 at 10:48 AM, Time Less wrote:
>
>
>> > If I have 10B rows in my CF, and I can fit 10k rows per
>> > SStable, and the SStables are spread across 5 nodes, and I have 1 bloom
The error you are making is in thinking the Memtable thresholds are
the SSTable limits. They are not.
I am just checking math, not model.
On Tue, Apr 13, 2010 at 10:48 AM, Time Less wrote:
>
> numRowsOnNode = 10B / 20 = 500M.
50 million
> replicationFactor = 3.
> rowsPerSStable = 128MB / 1K = 131k.
>
> Therefore worst-case iops per read on this cluster are:
> (500M * 3 / 131k) * 3 = 150M / 131
On Tue, 2010-04-13 at 10:43 -0700, Ned Wolpert wrote:
> Is 0.6.0 a repackage of 0.6.0rc1? If we're running 0.6.0rc1 do we need
> to upgrade?
Yes (repackage), and no (you don't need to upgrade).
--
Eric Evans
eev...@rackspace.com
Hi All,
I'm seeing about 35-50ms to read 1000 columns from a CF using
get_range_slices. The columns are TimeUUIDType with empty values.
The row cache is enabled and I'm running the query 500 times in a row, so I
can only assume the row is cached.
Is that about what's expected or am I doing somet
> If I have 10B rows in my CF, and I can fit 10k rows per
> > SStable, and the SStables are spread across 5 nodes, and I have 1 bloom
> > filter false positive and 1 tombstone and ask the wrong node for the key,
> > then:
> >
> > Mv = (((2B/10k)+1+1)*3)+1 == ((200,000)+2)*3+1 == 300,007 iops to rea
For those who can't wait :
http://perso.rezel.net/cassandra_0.6.0-1_all.deb
md5sum is 6dd71e18e1e0239e50302098d395536e
Based on https://svn.apache.org/repos/asf/cassandra/tags/cassandra-0.6.0/
On Tue, Apr 13, 2010 at 7:43 PM, Ned Wolpert wrote:
> Is 0.6.0 a repackage of 0.6.0rc1? If we're running
Is 0.6.0 a repackage of 0.6.0rc1? If we're running 0.6.0rc1 do we need to
upgrade?
On Tue, Apr 13, 2010 at 10:12 AM, Eric Evans wrote:
> On Tue, 2010-04-13 at 11:14 -0500, Lee Parker wrote:
> > Any chance of an updated debian package?
>
> Yes. RSN.
>
> --
> Eric Evans
> eev...@rackspace.com
>
>
On Tue, 2010-04-13 at 11:14 -0500, Lee Parker wrote:
> Any chance of an updated debian package?
Yes. RSN.
--
Eric Evans
eev...@rackspace.com
Compared to what? 0.5? It's still pure java and runs fine on Windows, the
cassandra.bat is somewhat improved, and there are still no bat files for
nodetool and the other utilities.
On Tue, Apr 13, 2010 at 11:51 AM, dir dir wrote:
> Any change or update in the new version (especially for the im
Any change or update in the new version (especially for the implementation
in the Microsoft Windows)?? Thanks.
Dir.
On Tue, Apr 13, 2010 at 11:14 PM, Lee Parker wrote:
> Any chance of an updated debian package?
>
> Lee Parker
> l...@spredfast.com
>
> [image: Spredfast]
> On Tue, Apr 13, 2010 a
On Tue, Apr 13, 2010 at 11:23 AM, Scott White wrote:
> ERROR [pool-1-thread-60] 2010-04-13 04:58:11,806 Cassandra.java (line 1492)
> Internal error processing insert
internal error means "check the server log for the stacktrace"
> Also a side question I was curious about, is the state of a boost
We started seeing for the first time errors that look like this last night
after things were running smoothly for a couple days after switching to
0.6-rc1:
ERROR [pool-1-thread-60] 2010-04-13 04:58:11,806 Cassandra.java (line 1492)
Internal error processing insert
We had not made any other change
Any chance of an updated debian package?
Lee Parker
l...@spredfast.com
[image: Spredfast]
On Tue, Apr 13, 2010 at 10:10 AM, Donyee wrote:
> Great!
>
> 2010/4/13 Eric Evans
>
>
>> I'm pleased to announce the official release of Apache Cassandra 0.6.0,
>> (aka The Best Evar). Get yours now from
On Sat, Apr 10, 2010 at 2:24 PM, Anthony Molinaro
wrote:
> This is sort of a pre-emptive question as the compaction I'm doing hasn't
> failed yet but I expect it to any time now. I have a cluster which has been
> storing user profile data for a client. Recently I've had to go back and
> reload
Great!
2010/4/13 Eric Evans
>
> I'm pleased to announce the official release of Apache Cassandra 0.6.0,
> (aka The Best Evar). Get yours now from the usual place[1], and as
> always, be sure to read the release notes[2] (especially if you're
> upgrading).
>
> Since this is our first official rel
I'm pleased to announce the official release of Apache Cassandra 0.6.0,
(aka The Best Evar). Get yours now from the usual place[1], and as
always, be sure to read the release notes[2] (especially if you're
upgrading).
Since this is our first official release since graduating to a top-level
projec
On Tue, 2010-04-13 at 16:05 +0200, Philippe wrote:
> I'm confused : don't range queries such as the ones we've been
> discussing require using an orderedpartitionner ?
Alright, so distribution depends on your choice of token.
--
Eric Evans
eev...@rackspace.com
I'm confused : don't range queries such as the ones we've been discussing
require using an orderedpartitionner ?
Le 13 avr. 2010 15:58, "Eric Evans" a écrit :
On Tue, 2010-04-13 at 08:57 +0200, Philippe wrote:
> Okay so if i switch columns and super columns i...
Sure.
> Assuming this is all co
On Tue, 2010-04-13 at 08:57 +0200, Philippe wrote:
> Okay so if i switch columns and super columns in my model i get what i
> want
> don't i?
>
> Super column = x
> Column = time frame
> Now i can get 2d range extracts from the grid and every cell will
> contain all time frame data. Is this correc
Thanks for all your advice - I am evaluating couchDB now. I can
see that each is designed for different use-cases and couchDB is optimal
for this.
Many thanks all.
Col
Colin Yates gmail.com> writes:
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