I'm trying to install Cassandra from package on Ubuntu8.04 based on the info
from following page:
http://wiki.apache.org/cassandra/DebianPackaging
I added the two memtioned sources to /etc/apt/sources.list, did an apt-get
update, but got the following error
W: GPG error: http://www.apache.org un
Hello list,
I just setup a 3-node ring in a virtualbox bridging environment. By running
the 'cassandra -f' the log indicates it discovers other nodes but if I
execute 'nodeprobe -host ring', it only display one node.
guestOS ~ # /usr/local/src/apache-cassandra-0.5.1/bin/nodeprobe -host
192.168.1
I just started a LinkedIn group called "Cassandra NoSQL"
http://www.linkedin.com/groups?gid=2822930 I invite folks to join as
it has a job board and is a good place for networking stuff too =8^)
I look forward to the continued nitty gritty that goes on here perhaps
the linked in discussions can gr
Beier,
This may help:
http://daily-hacking.blogspot.com/2009/06/nopubkey-during-apt-get-update.html
(Also: It would be a good idea to add this to the wiki.)
Regards,
Hernan.
From:
Beier Cai
To:
cassandra-user@incubator.apache.org
Date:
03/03/2010 07:26 AM
Subject:
Error installing Cassandra
On 03/03/2010 04:22 AM, Beier Cai wrote:
I'm trying to install Cassandra from package on Ubuntu8.04 based on the
info from following page:
http://wiki.apache.org/cassandra/DebianPackaging
I added the two memtioned sources to /etc/apt/sources.list, did an
apt-get update, but got the following
On Mon, 01 Mar 2010 12:15:11 -0600 Ted Zlatanov wrote:
TZ> I need to find Cassandra servers on my network from several types of
TZ> clients and platforms. The goal is to make adding and removing servers
TZ> painless, assuming a leading window of at least 1 hour. The discovery
TZ> should be aut
Providing "what is going on, nothing seems to be happening" visibility
is something we have struggled with here.
When we get https://issues.apache.org/jira/browse/CASSANDRA-579 done
for 0.7 we won't have the big "waiting to stream" problem since we'll
stream directly from the data files w/o antico
I don't understand the advantages of ColumnFamilies over a
SuperColumnFamily with just one supercolumn. Why have the former if the
latter is functionally equivalent?
Thanks
Ted
http://issues.apache.org/jira/browse/CASSANDRA-598
2010/3/3 Ted Zlatanov :
> I don't understand the advantages of ColumnFamilies over a
> SuperColumnFamily with just one supercolumn. Why have the former if the
> latter is functionally equivalent?
>
> Thanks
> Ted
>
>
2010/3/3 Ted Zlatanov :
> I don't understand the advantages of ColumnFamilies over a
> SuperColumnFamily with just one supercolumn. Why have the former if the
> latter is functionally equivalent?
Being pretty new here with Cassandra's terminology, I'm not sure what
a SuperColumnFamily is. Or mayb
2010/3/3 Ted Zlatanov :
> On Mon, 01 Mar 2010 12:15:11 -0600 Ted Zlatanov wrote:
>
> TZ> I need to find Cassandra servers on my network from several types of
> TZ> clients and platforms. The goal is to make adding and removing servers
> TZ> painless, assuming a leading window of at least 1 hour.
On Wed, 3 Mar 2010 07:23:48 -0600 Jonathan Ellis wrote:
JE> 2010/3/3 Ted Zlatanov :
>> I don't understand the advantages of ColumnFamilies over a
>> SuperColumnFamily with just one supercolumn. Why have the former if the
>> latter is functionally equivalent?
JE> http://issues.apache.org/jira/b
On Wed, 3 Mar 2010 14:43:14 +0100 Alexandre Conrad
wrote:
AC> 2010/3/3 Ted Zlatanov :
>> I don't understand the advantages of ColumnFamilies over a
>> SuperColumnFamily with just one supercolumn. Why have the former if the
>> latter is functionally equivalent?
AC> As far as I understand, ther
On Wed, Mar 3, 2010 at 07:43, Alexandre Conrad
wrote:
> As far as I understand, there's how I organize Cassandra entities:
>
> http://paste.pocoo.org/show/185126/
>
> Is this somehow correct?
>
> --
> Alex
> twitter.com/alexconrad
>
It is basically correct. Your diagram could be extended by indi
2010/3/3 Ted Zlatanov :
> KeySpace->Row->ColumnFamily->Column[name, value]
> (a two-level map)
>
> KeySpace->Row->SuperColumnFamily->SuperColumn[name]->Column[name, value]
> (a three-level map)
Thanks for the explanation. So this means that entities under
SuperColumnFamily can only be SuperColumns
On Wed, 3 Mar 2010 07:57:32 -0600 Gary Dusbabek wrote:
GD> 2010/3/3 Ted Zlatanov :
TZ> I need to find Cassandra servers on my network from several types of
TZ> clients and platforms. The goal is to make adding and removing servers
TZ> painless, assuming a leading window of at least 1 hour. The
On Wed, 3 Mar 2010 15:21:42 +0100 Alexandre Conrad
wrote:
AC> 2010/3/3 Ted Zlatanov :
KeySpace-> Row->ColumnFamily->Column[name, value]
>> (a two-level map)
>>
KeySpace-> Row->SuperColumnFamily->SuperColumn[name]->Column[name, value]
>> (a three-level map)
AC> Thanks for the explanation. So t
2010/3/3 Gary Dusbabek :
> It is basically correct. Your diagram could be extended by indicating
> that columns consist of name, value, timestamp and that super columns
> have names and that a column family consists exclusively of columns or
> super columns (never both).
Thanks Gary for the preci
2010/3/3 Ted Zlatanov :
>
> I don't think routing multicasts across subnets is a burden.
Try telling that to a network administrator who is concerned about
flooding his routers with multicast chatter. First, you'll have to
find a network administrator who is willing to even have that
conversation
I would rather move to a more flexible model ("as many levels of
nesting as you want") than a less-flexible one.
2010/3/3 Ted Zlatanov :
> On Wed, 3 Mar 2010 07:23:48 -0600 Jonathan Ellis wrote:
>
> JE> 2010/3/3 Ted Zlatanov :
>>> I don't understand the advantages of ColumnFamilies over a
>>> Sup
On Wed, 3 Mar 2010 08:41:18 -0600 Gary Dusbabek wrote:
GD> It wouldn't be a lot work for you to write a mdns service that would
GD> query the seeds for endpoints and publish it to interested clients.
GD> It could go in contrib.
This requires knowledge of the seeds so I need to at least look in
On Wed, 3 Mar 2010 08:56:16 -0600 Jonathan Ellis wrote:
JE> I would rather move to a more flexible model ("as many levels of
JE> nesting as you want") than a less-flexible one.
That's very exciting. I've often wished for "just one more level" while
putting Cassandra schemas together, so I hope
2010/3/3 Ted Zlatanov :
> On Wed, 3 Mar 2010 08:41:18 -0600 Gary Dusbabek wrote:
>
> GD> It wouldn't be a lot work for you to write a mdns service that would
> GD> query the seeds for endpoints and publish it to interested clients.
> GD> It could go in contrib.
>
> This requires knowledge of the s
On Wed, 3 Mar 2010 09:32:33 -0600 Gary Dusbabek wrote:
GD> 2010/3/3 Ted Zlatanov :
>> This requires knowledge of the seeds so I need to at least look in
>> storage-conf.xml to find them. Are you saying there's no chance of
>> Cassandra nodes (or just seeds) announcing themselves, even if it's
>
-1 core.
+1 contrib.
+10 github.
Client-endpoint discovery is not currently addressed at all in the
codebase. I don't think it is a job we should take up because needs
will vary across applications and there isn't a general solution that
will work for everybody.
Gary
2010/3/3 Ted Zlatanov :
> O
On Wed, 2010-03-03 at 10:05 -0600, Ted Zlatanov wrote:
> I can do a patch+ticket for this in the core, making it optional and
> off by default, or do the same for a contrib/ service as you
> suggested. So I'd appreciate a +1/-1 quick vote on whether this can
> go in the core to save me from rewrit
So is the current general practice to connect to a known node, e.g. by ip
address?
If so, what happens if that node is down? Is the entire cluster effectively
broken at that point?
Or do clients simply maintain a list of nodes a just connect to the first
available in the list?
Thanks in advance
On Wed, 03 Mar 2010 10:43:19 -0600 Eric Evans wrote:
EE> It's entirely possible that you've identified a problem that others
EE> can't see, or haven't yet encountered. I don't see it, but then maybe
EE> I'm just thick.
Getting back to my original question, how do you (and others) find
usable Ca
2010/3/3 Ted Zlatanov :
> On Wed, 03 Mar 2010 10:43:19 -0600 Eric Evans wrote:
>
> EE> It's entirely possible that you've identified a problem that others
> EE> can't see, or haven't yet encountered. I don't see it, but then maybe
> EE> I'm just thick.
>
> Getting back to my original question, how
+1 on erics comments
We could create a branch or git fork where you guys could develop it,
and if it reaches a usable state and others find it interesting it
could get integrated in then
On 3/3/10, Eric Evans wrote:
> On Wed, 2010-03-03 at 10:05 -0600, Ted Zlatanov wrote:
>> I can do a patch+tic
On Wed, 3 Mar 2010 09:04:37 -0800 Ryan King wrote:
RK> Something like RRDNS is no more complex that managing a list of seed nodes.
How do your clients at Twitter find server nodes? Do you just run them
local to each node?
My concern is that both RRDNS and seed node lists are vulnerable to
ind
At Digg we have automated infrastructure. We use Puppet + our own in-house
system that allows us to query pools of nodes for 'seeds'. Config files like
storage-conf.xml are auto generated on the fly, and we randomly pick a set of
seeds.
Seeds can be per datacenter as well. As soon as a machine
2010/3/3 Ted Zlatanov
> On Wed, 3 Mar 2010 09:04:37 -0800 Ryan King wrote:
>
> RK> Something like RRDNS is no more complex that managing a list of seed
> nodes.
>
> My concern is that both RRDNS and seed node lists are vulnerable to
> individual node failure.
They're not. That's why they're l
On Wed, 3 Mar 2010 12:08:06 -0500 Ian Holsman wrote:
IH> We could create a branch or git fork where you guys could develop it,
IH> and if it reaches a usable state and others find it interesting it
IH> could get integrated in then
Thanks, Ian. Would it be OK to do it as a patch in
http://issue
You are proposing manually moving your data from a 5TB disk to a 12TB
disk, and that is the only change you want to make? Then just keep
the IP the same when you restart it after moving, and you won't have
to do anything else, it will just look like the node was down
temporarily and is now back up
We appear to be reaching consensus that this is solving a non-problem,
so I have closed that ticket.
2010/3/3 Ted Zlatanov :
> On Wed, 3 Mar 2010 12:08:06 -0500 Ian Holsman wrote:
>
> IH> We could create a branch or git fork where you guys could develop it,
> IH> and if it reaches a usable state
On Wed, 2010-03-03 at 16:49 +, Christopher Brind wrote:
> So is the current general practice to connect to a known node, e.g. by
> ip address?
There are so many ways you could tackle this but...
If you're talking about provisioning/startup of new nodes, just use the
IPs of 2-4 nodes in the se
On Wed, 3 Mar 2010 09:19:28 -0800 Chris Goffinet wrote:
CG> At Digg we have automated infrastructure. We use Puppet + our own
CG> in-house system that allows us to query pools of nodes for
CG> 'seeds'. Config files like storage-conf.xml are auto generated on
CG> the fly, and we randomly pick a s
Great, thanks Eric
On 3 Mar 2010 17:27, "Eric Evans" wrote:
On Wed, 2010-03-03 at 16:49 +, Christopher Brind wrote:
> So is the current general practice to ...
There are so many ways you could tackle this but...
If you're talking about provisioning/startup of new nodes, just use the
IPs of
2010/3/3 Ted Zlatanov :
> On Wed, 3 Mar 2010 09:04:37 -0800 Ryan King wrote:
>
> RK> Something like RRDNS is no more complex that managing a list of seed
> nodes.
>
> How do your clients at Twitter find server nodes? Do you just run them
> local to each node?
RRDNS + loading the token map to di
On Wed, Mar 3, 2010 at 9:27 AM, Eric Evans wrote:
> On Wed, 2010-03-03 at 16:49 +, Christopher Brind wrote:
>> So is the current general practice to connect to a known node, e.g. by
>> ip address?
>
> There are so many ways you could tackle this but...
>
> If you're talking about provisioning/
On Wed, 3 Mar 2010 09:35:31 -0800 Ryan King wrote:
>> With seed node lists, if I get unlucky I'd be trying to hit a downed
>> node in which case I may as well just use RRDNS and deal with connection
>> failure from the start.
RK> Why would you not deal with connection failure?
I mean it's simp
Sure... now that I understand what is going on it is easy to see the signs
(looking in the data/usertable/stream directory, then looking for the tmp
files). A small script (or some special logic in nodetool) that just looked for
those signs even, and said "things are in progress," would be helpf
On Wed, Mar 3, 2010 at 4:47 AM, Joseph Stein wrote:
> I just started a LinkedIn group called "Cassandra NoSQL"
> http://www.linkedin.com/groups?gid=2822930 I invite folks to join as
> it has a job board and is a good place for networking stuff too =8^)
>
> I look forward to the continued nitty gri
wouldnt nosqlgigs.com ala djangogigs.com be simpler than ning? Seems
like this could/should be about a 1-2 hour job for someone to stand
up?
Jeff
On Wed, Mar 3, 2010 at 11:04 AM, Tatu Saloranta wrote:
> On Wed, Mar 3, 2010 at 4:47 AM, Joseph Stein wrote:
>> I just started a LinkedIn group calle
i dunno, one mail to a mailing list seemed to have worked pretty well :P
cheers,
jesse
--
jesse mcconnell
jesse.mcconn...@gmail.com
On Wed, Mar 3, 2010 at 13:06, Jeffrey Johnson wrote:
> wouldnt nosqlgigs.com ala djangogigs.com be simpler than ning? Seems
> like this could/should be about a 1
And the only thing worse than a wiki is a wiki plus a blog plus five social
networks plus a website built on Rails plus SMS notifications plus ... :)
Jeremey.
On Mar 2, 2010, at 10:43 PM, ext Jonathan Ellis wrote:
> If there's one thing that's worse than a mailing list as a job board,
> it's a
On Wed, Mar 3, 2010 at 11:06 AM, Jeffrey Johnson wrote:
> wouldnt nosqlgigs.com ala djangogigs.com be simpler than ning? Seems
> like this could/should be about a 1-2 hour job for someone to stand
> up?
It all depends. Just wanted to mention it -- Ning networks are general
purpose, not optimized
On Wed, Mar 3, 2010 at 6:56 AM, Jonathan Ellis wrote:
> I would rather move to a more flexible model ("as many levels of
> nesting as you want") than a less-flexible one.
+1
This is one of patterns that I have seen many times: providing for "as
many levels as you want" may not be more difficult
has anyone performed any testing on the affect of RAID 0 stripe size on
cassandra performance? i have 3 drives in RAID 0 setup with 128k stripe
size and i think the performance can be better once the sstable file
sizes start to grow.
any advice?
You probably assigned all nodes the same token. Don't do that. :)
On Wed, Mar 3, 2010 at 4:41 AM, Pahud wrote:
> Hello list,
> I just setup a 3-node ring in a virtualbox bridging environment. By running
> the 'cassandra -f' the log indicates it discovers other nodes but if I
> execute 'nodeprobe
oh yes! I just cloned my vbox after the 1st node generated its token so all
other clones have the same token.
I fixed this problem. Thanks.
pahud
On Thu, Mar 4, 2010 at 9:35 AM, Jonathan Ellis wrote:
> You probably assigned all nodes the same token. Don't do that. :)
>
>
> >
> >
> >
> >
> >
>
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