You should submit your minor change to jira for others who might want to try it.
On Sat, Mar 13, 2010 at 3:18 AM, Weijun Li weiju...@gmail.com wrote:
Tried Sylvain's feature in 0.6 beta2 (need minor change) and it worked
perfectly. Without this feature, as far as you have high volume new and
On Sat, Mar 13, 2010 at 12:51 AM, Kauzki Aranami
kazuki.aran...@gmail.com wrote:
1. Please give notes the replication strategy of Cassandra is selected.
Can you be more specific?
2. About the Zab protocol adopted with Zookeeper. The weak point of
the Paxos protocol of Chubby is a delay. Is
based on 0.6 beta2.
-Weijun
-Original Message-
From: Jonathan Ellis [mailto:jbel...@gmail.com]
Sent: Saturday, March 13, 2010 5:36 AM
To: cassandra-user@incubator.apache.org
Subject: Re: question about deleting from cassandra
You should submit your minor change to jira for others
That would be a bug, not intended behavior. Can you open a ticket?
On Fri, Mar 12, 2010 at 11:48 AM, Omer van der Horst Jansen
ome...@yahoo.com wrote:
I've noticed that both 0.5.1 and 0.6b2 return (ReplicationFactor)
identical copies of the data stored in my keyspace whenever I make a
call to
I think you mean compaction?
You can use nodeprobe / nodetool for that.
http://wiki.apache.org/cassandra/NodeProbe
On Fri, Mar 12, 2010 at 12:40 PM, Weijun Li weiju...@gmail.com wrote:
Suppose I insert a lot of new items but also delete a lot of new items
daily, it will be ideal if I can
Great!
You should also link it from
http://wiki.apache.org/cassandra/ClientExamples (click Login at the
top to create an account.)
On Fri, Mar 12, 2010 at 3:57 PM, Ned Wolpert ned.wolp...@imemories.com wrote:
Folks-
I put together a quick n' dirty grails plugin for Cassandra, wrapped with
get_key_range is deprecated. You should use get_range_slice.
On Fri, Mar 12, 2010 at 3:59 PM, Jon Graham sjclou...@gmail.com wrote:
Hello,
When using the get_key_range method with ConsistencyLevel.ONE an entire
block of keys is not returned.
I loop over the get_key_range method, advancing
On Fri, Mar 12, 2010 at 1:55 PM, Krishna Sankar ksanka...@gmail.com wrote:
I was looking at this from CASSANDRA-873 as well as hands-on homework (!)
for my OSCON tutorial. Have couple of questions. Would appreciate insights:
A) Cassandra-873 suggests Luenandra as one demo application
B) Are
goffi...@digg.com wrote:
We could do it on April 22 (1 week later), that's my birthday :-) What better
way to celebrate haha.
-Chris
On Mar 10, 2010, at 9:58 AM, Jonathan Ellis wrote:
I'm in either way, but if we push it a week later then the twitter
guys could (a) make it and (b) pimp
Except that for a major compaction the whole thing gets put in one
directory. That's the problem w/ the JBOD approach.
On Thu, Mar 11, 2010 at 12:01 PM, Eric Evans eev...@rackspace.com wrote:
On Wed, 2010-03-10 at 23:20 -0600, Jonathan Ellis wrote:
On Wed, Mar 10, 2010 at 9:31 PM, Anthony
it's ordered by the column name as determined by the subcolumn
comparator you declared in the definition, yes
On Thu, Mar 11, 2010 at 12:24 PM, Matteo Caprari
matteo.capr...@gmail.com wrote:
Hi.
If I iterate over SuperColumn.getSubColumn(), do I get
columns sorted by the column name?
Cool!
On Thu, Mar 11, 2010 at 11:12 PM, Padraig O'Sullivan
osullivan.padr...@gmail.com wrote:
We have developed a C++ client library based on the hector Java client
for Cassandra that we intend on using for Drizzle integration. This
library is still very much alpha and more features will be
Please don't use trunk unless you're actively fixing bugs. If you
want the latest greatest, get the 0.6 branch from svn.
On Wed, Mar 10, 2010 at 6:46 AM, shirish shirishredd...@gmail.com wrote:
hello,
I have just download the source code from the trunk using svn, I have set up
the following
For the record, I note that no row cache is the default on
user-defined CFs; we include it in the sample configuration file as an
example only.
On Wed, Mar 10, 2010 at 9:58 AM, Sylvain Lebresne sylv...@yakaz.com wrote:
So did you disable the row cache entirely?
Yes (getting back reasonable
Thanks for testing that, added a note to
http://wiki.apache.org/cassandra/CassandraHardware on stripe size.
On Wed, Mar 10, 2010 at 11:03 AM, B. Todd Burruss bburr...@real.com wrote:
with the file sizes we're talking about with cassandra and other database
products, the stripe size doesn't seem
', 'www.example.com')),
],
'Item_likers': [
Mutation(Column('user_1', 'xx')),
Mutation(Column('user_2', 'xx'))
]
}
}
On Tue, Mar 9, 2010 at 7:33 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Tue
I'm in either way, but if we push it a week later then the twitter
guys could (a) make it and (b) pimp it at their own conference.
On Wed, Mar 10, 2010 at 12:26 AM, Jeff Hodges jhod...@twitter.com wrote:
Ah, hell. Thought this was the first day. Can't make it.
--
Jeff
On Mar 9, 2010 9:32 PM,
http://nosqlboston.eventbrite.com/
don't know about recording / casting plans.
On Wed, Mar 10, 2010 at 3:25 PM, Tim Haines tmhai...@gmail.com wrote:
Hey Jonathan,
What event is this and will it be livecasted/recorded?
Cheers,
Tim.
On Thu, Mar 11, 2010 at 10:21 AM, Jonathan Ellis jbel
stands I'll take you up on it. I took a crack at it in
https://issues.apache.org/jira/browse/CASSANDRA-860 - also in large part to
get my feet wet with the code.
-Original Message-
From: Jonathan Ellis [mailto:jbel...@gmail.com]
Sent: Tuesday, February 16, 2010 9:22 PM
To: cassandra
I think he means how the column names are rendered as bytes but the
values are strings.
On Wed, Mar 10, 2010 at 5:22 PM, Brandon Williams dri...@gmail.com wrote:
On Wed, Mar 10, 2010 at 5:09 PM, Bill Au bill.w...@gmail.com wrote:
I am checking out 0.6.0-beta2 since I need the batch-mutate
On Wed, Mar 10, 2010 at 9:31 PM, Anthony Molinaro
antho...@alumni.caltech.edu wrote:
I would almost
recommend just keeping things simple and removing multiple data directories
from the config altogether and just documenting that you should plan on using
OS level mechanisms for growing
On Tue, Mar 9, 2010 at 7:15 AM, Sylvain Lebresne sylv...@yakaz.com wrote:
1) stress.py -t 10 -o read -n 5000 -c 1 -r
2) stress.py -t 10 -o read -n 50 -c 1 -r
In the case 1) I get around 200 reads/seconds and that's pretty stable. The
disk is spinning like crazy (~25% io_wait), very
On Tue, Mar 9, 2010 at 8:31 AM, Sylvain Lebresne sylv...@yakaz.com wrote:
Well, unless I'm mistaking, that's the same in my example as I give in
both case
to stress.py the option '-c 1' which tells it to retrieve only one
column each time
even in the case where I have 100 columns by row.
Oh.
On Tue, Mar 9, 2010 at 3:53 AM, Matteo Caprari matteo.capr...@gmail.com wrote:
Thanks Jonathan.
Correct if I'm wrong: you are suggesting that each time we receive a new
row (item, [users]) we do 2 operations:
1) insert (or merge) this row 'as it is' (item, [users])
2) for each user in
On Tue, Mar 9, 2010 at 7:30 AM, Matteo Caprari matteo.capr...@gmail.com wrote:
On Tue, Mar 9, 2010 at 1:23 PM, Jonathan Ellis jbel...@gmail.com wrote:
That's true. So you'd want to use a custom comparator where first 64
bits is the Long and the rest is the userid, for instance.
(Long
v2 of patch attached to #864 (replaces old one)
On Tue, Mar 9, 2010 at 6:08 PM, Todd Burruss bburr...@real.com wrote:
using tip of 0.6 branch with 864.txt patch. i have 4 nodes, one node is
overcome with compaction right now. i started with no load then added a tiny
bit of load and almost
I can make it. \o/
On Tue, Mar 9, 2010 at 8:05 PM, Dan Di Spaltro dan.dispal...@gmail.com wrote:
Alright guys, we have settled on a date for the Cassandra meetup on...
April 15th, better known as, Tax day!
We can host it here at Cloudkick, unless a cooler startup wants to host it.
Atomicity: no.
2ary indexes: CASSANDRA-749 is targeting the 0.8 release
2010/3/9 Patricio Echagüe patric...@gmail.com:
Hey Jonathan, has there been any update on this feature?
Thanks a lot
Patricio
On Thu, Dec 3, 2009 at 2:35 PM, Jonathan Ellis jbel...@gmail.com wrote:
that is still very
On Mon, Mar 8, 2010 at 11:22 AM, Erik Holstad erikhols...@gmail.com wrote:
I was probably a little bit unclear here. I'm wondering about the two byte[]
in Column.
One for name and one for value. I was under the impression that the
skiplistmap
wraps the Columns, not that the name and the value
It means that you're doing a lot of reads that saw multiple versions
of the answer, which depending on your workload may be normal
On Mon, Mar 8, 2010 at 5:31 PM, B. Todd Burruss bburr...@real.com wrote:
i am seeing a lot of these INFO level messages in cassandra server's logs:
2010-03-08
something is screwed up if writes are 10x slower than reads
On Mon, Mar 8, 2010 at 5:52 PM, David Dabbs dmda...@gmail.com wrote:
Hello. I've been running the vPork load generator against two Cassandra
nodes running in VMs.
I'm running a trunk build with W=2 and R=1 and out-of-the-box JVM_OPTS
On Mon, Mar 8, 2010 at 6:18 AM, Matteo Caprari matteo.capr...@gmail.com wrote:
The 'key' queries are:
These map straightforwardly to one CF per query.
- list all the items a user liked
row key is user id, columns names are timeuuid of when the like-ing
occurred, column value is either item
) and one of them must have been from the third replica that may
not have been updated yet by async replication?
On Mon, 2010-03-08 at 15:36 -0800, Jonathan Ellis wrote:
It means that you're doing a lot of reads that saw multiple versions
of the answer, which depending on your workload may
On Fri, Mar 5, 2010 at 2:13 AM, shiv shivaji shivaji...@yahoo.com wrote:
1. Is there a way to estimate the time it would take to compact this work
load? I hope the load balancing will be much faster after the compaction.
Curious how fast I can get the transfer once compaction is done.
0.6
Generally, you want to have different types of data in different CFs
so you can tune them separately (key / row caches).
Mixing different row types in one CF also makes doing get_slice_range
scans difficult.
On Fri, Mar 5, 2010 at 12:04 PM, Erik Holstad erikhols...@gmail.com wrote:
What are the
On Fri, Mar 5, 2010 at 1:36 PM, shiv shivaji shivaji...@yahoo.com wrote:
Sorry, how to get compaction progress with 0.6. Is it in nodetool or
somewhere else? I tried a few options after nodetool and did not get this
info.
it's under CompactionManager in jmx. I'm not sure if nodetool exposes
Fixed, thanks.
On Fri, Mar 5, 2010 at 11:12 AM, B. Todd Burruss bburr...@real.com wrote:
https://issues.apache.org/jira/browse/CASSANDRA-853
On Thu, 2010-03-04 at 19:00 -0800, Jonathan Ellis wrote:
This is the 0.6 beta yes? Looks like a regression, please open a ticket.
On Thu, Mar 4
In 0.6 gossip is over TCP.
On Fri, Mar 5, 2010 at 6:54 PM, Ashwin Jayaprakash
ashwin.jayaprak...@gmail.com wrote:
Hey guys! I have a simple question. I'm a casual observer, not a real
Cassandra user yet. So, excuse my ignorance.
I see that the Gossip feature uses UDP. I was curious to know if
You probably need to switch the server to framed thrift mode.
On Thu, Mar 4, 2010 at 2:02 AM, J T jt4websi...@googlemail.com wrote:
Hi,
I've been trying to piece together some notion of how to use cassandra from
an erlang client.
So far I have managed to come up with the following, but it
balancing seems a little slow, but I
will open a new thread on that if needed.
Thanks, Shiv
From: Jonathan Ellis jbel...@gmail.com
To: cassandra-user@incubator.apache.org
Sent: Wed, March 3, 2010 9:21:28 AM
Subject: Re: Anti-compaction Diskspace issue even when
0.6 has Hadoop map/reduce support (see contrib/wordcount for an
example) but this is more for analytics (small numbers of large
queries) than live web app style load.
Cassandra also has range queries (get_slice_range) -- performing a
slice across sequential rows, where you don't necessarily know
On Thu, Mar 4, 2010 at 1:33 PM, joe smith water4...@yahoo.com wrote:
Hi,
I installed a cluster of 2 nodes using 0.5 version of binary distribution.
Node 1 is on a Macbook 10.4 w/SoyLatte (java 1.6 port). Node 2 is on a
Linux desktop. The configuration is straight out of the distribution -
This is the 0.6 beta yes? Looks like a regression, please open a ticket.
On Thu, Mar 4, 2010 at 8:54 PM, Todd Burruss bburr...@real.com wrote:
i'm seeing a lot of these ... any idea?
2010-03-04 18:53:21,455 ERROR [MEMTABLE-POST-FLUSHER:1]
[DebuggableThreadPoolExecutor.java:94] Error in
A lot of churn is hard on Cassandra because of
http://wiki.apache.org/cassandra/DistributedDeletes, but Cassandra is
so fast that it may make up for that depending on your needs.
It's not designed to eliminate i/o entirely, no. But if you set
RowsCached=100% in 0.6 you'll get something pretty
INFO - Bootstrapping
But when I run nodetool streams, no streams are transferring:
Mode: Bootstrapping
Not sending any streams.
Not receiving any streams.
And it doesn't look like the node is getting any data. Any ideas?
Thanks for the help...
Brian
On 3/2/10 12:22 PM, Jonathan Ellis
http://issues.apache.org/jira/browse/CASSANDRA-598
2010/3/3 Ted Zlatanov t...@lifelogs.com:
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
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 t...@lifelogs.com:
On Wed, 3 Mar 2010 07:23:48 -0600 Jonathan Ellis jbel...@gmail.com wrote:
JE 2010/3/3 Ted Zlatanov t...@lifelogs.com:
I don't understand
a while.
I will track the jira issue of anticompaction and diskspace. Thanks for the
pointer.
Thanks, Shiv
From: Jonathan Ellis jbel...@gmail.com
To: cassandra-user@incubator.apache.org
Sent: Wed, February 24, 2010 11:34:59 AM
Subject: Re: Anti-compaction
We appear to be reaching consensus that this is solving a non-problem,
so I have closed that ticket.
2010/3/3 Ted Zlatanov t...@lifelogs.com:
On Wed, 3 Mar 2010 12:08:06 -0500 Ian Holsman i...@holsman.net wrote:
IH We could create a branch or git fork where you guys could develop it,
IH and
You probably assigned all nodes the same token. Don't do that. :)
On Wed, Mar 3, 2010 at 4:41 AM, Pahud pahud...@gmail.com 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
On Tue, Mar 2, 2010 at 6:43 AM, Eran Kutner e...@gigya.com wrote:
Is the procedure described in the description of ticket CASSANDRA-44 really
the way to do schema changes in the latest release? I'm not sure what's your
thoughts about this but our experience is that every release of our software
, Mar 1, 2010 at 4:55 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Mon, Mar 1, 2010 at 5:39 PM, Jon Graham sjclou...@gmail.com wrote:
Reached an EOL or something bizzare occured. Reading from: /192.168.2.13
BufferSizeRemaining: 16
This one is harmless
java.io.IOException: Value too large
On Tue, Mar 2, 2010 at 1:54 PM, Brian Frank Cooper
coop...@yahoo-inc.com wrote:
Hi folks,
I’m running 0.5 and I had 2 nodes up and running, then added a 3rd node in
bootstrap mode. I understand from other discussion list threads that the new
node doesn’t serve reads while it is bootstrapping,
On Tue, Mar 2, 2010 at 4:13 PM, jeremey.barr...@nokia.com wrote:
I'm exploring data layouts and it seems like the common practice is to store
an index in one CF (e.g. userid for row key and thingid for column name) and
then to fetch all the things by their thingids separately... so get
(This is not to say that I think job posts are off-topic here, because
they are not.)
On Tue, Mar 2, 2010 at 10:43 PM, Jonathan Ellis jbel...@gmail.com wrote:
If there's one thing that's worse than a mailing list as a job board,
it's a wiki. :)
On Tue, Mar 2, 2010 at 10:39 PM, Ryan Daum r
.
And it doesn’t look like the node is getting any data. Any ideas?
Thanks for the help...
Brian
On 3/2/10 12:22 PM, Jonathan Ellis jbel...@gmail.com wrote:
On Tue, Mar 2, 2010 at 1:54 PM, Brian Frank Cooper
coop...@yahoo-inc.com wrote:
Hi folks,
I’m running 0.5 and I had 2 nodes up
On Tue, Mar 2, 2010 at 11:57 PM, Cool BSD c...@coolbsd.com wrote:
Be short - what's the ideal column size in real world?
Long description - I'm working on a prototype, the application is a data
store that holding blobs sizing from couple of KB to hundreds of MB, close
to 1GB in the worst
0.5.0.
Is this a separate package/tool?
Thanks,
Jon
On Wed, Feb 24, 2010 at 8:17 PM, Jonathan Ellis jbel...@gmail.com wrote:
nodeprobe loadbalance and/or nodeprobe move
http://wiki.apache.org/cassandra/Operations
On Wed, Feb 24, 2010 at 6:17 PM, Jon Graham sjclou...@gmail.com wrote
On Mon, Mar 1, 2010 at 4:06 PM, Erik Holstad erikhols...@gmail.com wrote:
So that is kinda of what I want to do, but I want to go from
a row with multiple columns to multiple rows with one column
Right, and I'm trying to tell you that this is a bad idea unless you
are worried about exhausting
On Mon, Mar 1, 2010 at 4:41 PM, Anthony Molinaro
antho...@alumni.caltech.edu wrote:
Hi,
I was just wondering what the process might be for removing an old
column family in 0.5.0.
Can I just update the config and restart the server?
Yes, but make sure your commitlog is flushed first (and
On Mon, Mar 1, 2010 at 4:49 PM, Erik Holstad erikhols...@gmail.com wrote:
Haha!
Thanks. Well I'm z little bit worried about this but since the indexes are
pretty
small I don't think it is going to be too bad. But was mostly thinking about
performance and and having the index row as a
On Mon, Mar 1, 2010 at 3:18 PM, Jon Graham sjclou...@gmail.com wrote:
Thanks Jonathan.
It seems like the load balance operation isn't moving. I haven't seen any
data file time changes in 2 hours and no location file time
changes in over an hour.
I can see a tcp port # 7000 opened on the
Then you definitely want one row, range queries are slower than we'd
like right now. (Ticket to fix that:
https://issues.apache.org/jira/browse/CASSANDRA-821)
On Mon, Mar 1, 2010 at 5:00 PM, Erik Holstad erikhols...@gmail.com wrote:
On Mon, Mar 1, 2010 at 2:51 PM, Jonathan Ellis jbel
On Mon, Mar 1, 2010 at 5:39 PM, Jon Graham sjclou...@gmail.com wrote:
Reached an EOL or something bizzare occured. Reading from: /192.168.2.13
BufferSizeRemaining: 16
This one is harmless
java.io.IOException: Value too large for defined data type
at
Keys are strings. That means they have to be UTF8-encoded, although
thrift bindings for many languages (including python) don't help you
with this.
On Sat, Feb 27, 2010 at 7:43 PM, Robert Edmonds edmo...@debian.org wrote:
hi,
i'm using cassandra 0.5.0 and pycassa 0.1.
i'd like to store
Yes.
On Sat, Feb 27, 2010 at 8:34 PM, Robert Edmonds edmo...@debian.org wrote:
On 2010-02-28, Jonathan Ellis jbel...@gmail.com wrote:
Keys are strings. That means they have to be UTF8-encoded, although
thrift bindings for many languages (including python) don't help you
with this.
ah, i
The only kind of freeze that makes sense there is your reads are i/o
bound and the extra disk activity is killing you. In that case the
fix is to add more RAM, or give less to the JVM so the OS can use more
for buffer cache.
On Thu, Feb 25, 2010 at 8:01 AM, Boris Shulman shulm...@gmail.com
.
On Thu, Feb 25, 2010 at 4:07 PM, Jonathan Ellis jbel...@gmail.com wrote:
The only kind of freeze that makes sense there is your reads are i/o
bound and the extra disk activity is killing you. In that case the
fix is to add more RAM, or give less to the JVM so the OS can use more
for buffer
Compaction is why http://wiki.apache.org/cassandra/CassandraHardware
recommends raid0-ing if you are concerned about free disk space
limits.
On Thu, Feb 25, 2010 at 1:36 PM, Gary Dusbabek gdusba...@gmail.com wrote:
Cassandra always compacts to the directory with the most free space.
There is
can tell.
These are good suggestions. Thanks.
(I don't know whether it is worth describing this in a JIRA as a bug. I
would be willing to do it if you like me to do so.)
On Thu, Feb 25, 2010 at 6:19 AM, Jonathan Ellis jbel...@gmail.com wrote:
Then it sounds like a bug.
Do A and B agree
Cassandra column values are byte arrays. Turning your java object
into a byte[] is your responsibility. :)
On Thu, Feb 25, 2010 at 10:11 AM, Charles Moulliard
cmoulli...@gmail.com wrote:
Hi,
Is it possible to attach a binary stream to a Cassandra DB ? I would like to
say is it possible to
CLI uses CL.ONE for reads and writes.
It has no user-level documentation other than its help output.
On Thu, Feb 25, 2010 at 1:08 PM, Masood Mortazavi masoodmortaz...@gmail.com
wrote:
What is the write and read consistency level for the CLI tool
cassandra-cli ?
Do the set and get
that maybe nodeprobe
repair might do it, will it?
Thanks,
-Anthony
On Thu, Feb 25, 2010 at 01:43:22PM -0600, Jonathan Ellis wrote:
Compaction is why http://wiki.apache.org/cassandra/CassandraHardware
recommends raid0-ing if you are concerned about free disk space
limits.
On Thu, Feb 25
Yes, that's going to hurt forward scans with no start column.
(Reverse scans, or scans that start with a known live column, will
still be fast b/c of the per-row column indexes.)
On Thu, Feb 25, 2010 at 8:56 PM, Edmond Lau edm...@ooyala.com wrote:
Given that Cassandra needs to maintain
On Thu, Feb 25, 2010 at 3:54 PM, Anthony Molinaro
antho...@alumni.caltech.edu wrote:
What about the case where cpu and ram are underutilized, and your bottleneck
is disk io (which seems to often be the case in ec2), then adding more
spindles improves overall throughput of the system. I've
only the total row size limit (must fit in memory during compaction)
On Wed, Feb 24, 2010 at 7:47 AM, kevin kevincastigli...@gmail.com wrote:
On Tue, Feb 23, 2010 at 10:06 AM, Jonathan Ellis jbel...@gmail.com wrote:
the standard workaround is to change your data model to use non-super
columns
0.6 adds hadoop support for exactly this scenario (among others).
You can also use get_range_slice to iterate all keys against RP in
0.6, but it will be slow since it is difficult to parallelize
manually.
-Jonathan
On Wed, Feb 24, 2010 at 9:23 AM, Erik Holstad erikhols...@gmail.com wrote:
If
Other than you'll have to completely reload all your data when
changing partitioners, no, not much to think about. :)
On Wed, Feb 24, 2010 at 9:38 AM, Erik Holstad erikhols...@gmail.com wrote:
Thanks Jonathan!
We are thinking about moving over to the OPP to be able to be able to do
this
and
It does not. Someone would need it badly enough to code it first. :)
On Wed, Feb 24, 2010 at 10:26 AM, Wojciech Kaczmarek
kaczmare...@gmail.com wrote:
Btw,
does get_range_slice support reversed=true for keys (not column
predicates) ? In 0.5 seems not
On Tue, Feb 23, 2010 at 21:28, Jonathan
I suggest getting it working via plain thrift calls before trying
anything fancy. Otherwise it's probably premature optimization.
On Wed, Feb 24, 2010 at 11:43 AM, Martin Probst ser...@preisroboter.de wrote:
Hi,
i'm playing around a little bit with cassandra and trying to load some data
pinged #asfinfra. looks like they fixed it.
On Wed, Feb 24, 2010 at 11:09 AM, Mark Robson mar...@gmail.com wrote:
Hiya,
I'm looking at
http://wiki.apache.org/cassandra/RecentChanges
And there's an error.
Can someone look into it please?
Ta
Mark
On Wed, Feb 24, 2010 at 8:46 PM, Santal Li santal...@gmail.com wrote:
BTW: Somebody in my team told me, that if the cassandra managed data was too
huge( 15x than heap space) , will cause performance issues, is this true?
It really has more to do with what your hot data set is, than absolute
nodeprobe loadbalance and/or nodeprobe move
http://wiki.apache.org/cassandra/Operations
On Wed, Feb 24, 2010 at 6:17 PM, Jon Graham sjclou...@gmail.com wrote:
Hello,
I have 6 node Cassandra 0.5.0 cluster
using org.apache.cassandra.dht.OrderPreservingPartitioner with replication
factor 3.
Bootstrap files are streamed directly to data locations as .tmp files
and renamed when complete.
One of the problems w/ 0.5's bootstrap is indeed that it doesn't give
you any visibility into what is going on. This is addressed in 0.6 w/
additional JMX reporting.
On Wed, Feb 24, 2010 at 5:06 PM,
Is the configuration identical on all nodes? Specifically, is
ReplicationFactor set to 2 on all nodes?
On Wed, Feb 24, 2010 at 10:07 PM, Masood Mortazavi
masoodmortaz...@gmail.com wrote:
I wonder if anyone can provide an explanation for the following behavior
observed in a three-node cluster:
On Tue, Feb 23, 2010 at 12:33 AM, Michael Lee
mail.list.steel.men...@gmail.com wrote:
(1) A cluster cannot be enlarge(add more node into cluster) if it
already used more than half capacity:
If every node has data more than it’s half capacity , the admin may not
bootstrapping new node into
have to transfer a lot of
data to repair every time a single disk dies
-Jonathan
On Tue, Feb 23, 2010 at 10:26 AM, Brandon Williams dri...@gmail.com wrote:
On Tue, Feb 23, 2010 at 7:31 AM, Jonathan Ellis jbel...@gmail.com wrote:
(2) How to use node has 12 1TB disk??
You should use
On Tue, Feb 23, 2010 at 12:12 PM, kevin kevincastigli...@gmail.com wrote:
On Tue, Feb 23, 2010 at 10:07 AM, Jonathan Ellis jbel...@gmail.com wrote:
you enable row caching by upgrading to 0.6. :)
where can i get 0.6 from? svn trunk?
svn branches/cassandra-0.6
like I said, we're voting
you'd actually use first column as start, empty finish,
count=pagesize, and reversed=True, unless I'm misunderstanding
something.
On Tue, Feb 23, 2010 at 1:57 PM, Brandon Williams dri...@gmail.com wrote:
On Tue, Feb 23, 2010 at 11:54 AM, Sonny Heer sonnyh...@gmail.com wrote:
Columns can
Just scp the data files over, one per node. You just need to make
sure that the token on the node you are copying to is the same as the
source token. if you copy everything from data and commitlog this
will Just Work, since token is stored in data/system.
And of course you will need to tweak
On Mon, Feb 22, 2010 at 1:40 PM, Sonny Heer sonnyh...@gmail.com wrote:
Hey,
We are in the process of implementing a cassandra application service.
we have already ingested TB of data using the cassandra bulk loader
(StorageService).
One of the requirements is to get a data explosion factor
Breaking sooner rather than later is a feature, of sorts. You really
do need to give a sane max. Remember that thrift must pull results
into memory before giving them back to you, so allowing you to give it
a max that cannot possibly fit in memory is not doing you a favor.
-Jonathan
On Mon,
On Sun, Feb 21, 2010 at 10:01 AM, Ran Tavory ran...@gmail.com wrote:
I'm also no clear whether CASSANDRA-804 is going to be a real fix.
There's one way to find out. :P
On Wed, Feb 3, 2010 at 7:45 PM, Brian Frank Cooper
coop...@yahoo-inc.com wrote:
One thing that is puzzling is the scan performance. The scan experiment is to
scan between 1-100 records on each request. My 6 node Cassandra cluster is
only getting up to about 230 operations/sec, compared to
[replying to list, with permission]
On Mon, Feb 22, 2010 at 12:05 AM, jeremey.barr...@nokia.com wrote:
I'm looking for a very scalable primary data store for a large web/API
application. Our data consists largely of lists of things, per user. So a
user has a bunch (dozens to hundreds) of
haproxy should be fine.
normal GCs aren't a problem, you don't need to worry about that. what
is a problem is when you shove more requests into cassandra than it
can handle, so it tries to GC to get enough memory to handle that,
then you shove even more requests, so it GC's again, and it spirals
get to that point you can instruct me to implement this feature along
with the row-cache-write-through. Our goal is straightforward: to support
short read latency in high volume web application with write/read ratio to
be 1:1.
-Weijun
-Original Message-
From: Jonathan Ellis
.
-Weijun
-Original Message-
From: Jonathan Ellis [mailto:jbel...@gmail.com]
Sent: Thursday, February 18, 2010 12:04 PM
To: cassandra-user@incubator.apache.org
Subject: Re: Testing row cache feature in trunk: write should put record
in
cache
Did you force a GC from
http://wiki.apache.org/cassandra/Operations
On Fri, Feb 19, 2010 at 3:03 PM, Weijun Li weiju...@gmail.com wrote:
I setup a two cassandra clusters with 2 nodes each. Both use random
partitioner. It's strange that for each cluster, one node has much shortter
read latency than the other one
are you using the old deb package? because that had broken gc settings.
On Fri, Feb 19, 2010 at 10:40 PM, Santal Li santal...@gmail.com wrote:
I meet almost same thing as you. When I do some benchmarks write test, some
times one Cassandra will freeze and other node will consider it was
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