On Thu, Aug 25, 2011 at 9:33 AM, Yang tedd...@gmail.com wrote:
http://twitoaster.com/country-us/lenn0x/testing-out-a-slab-allocator-for-cassandra-to-reduce-gc-promotion-failures-by-stuhood-cassandra-memtables-gc-cc-jointheflock/
hi: I'm interested in learning more about the slaballocator,
background (on Hbase though, )
http://www.cloudera.com/blog/2011/03/avoiding-full-gcs-in-hbase-with-memstore-local-allocation-buffers-part-3/
The cassandra implementation is somewhat similar.
-ryan
thanks
On Thu, Aug 25, 2011 at 10:01 AM, Ryan King r...@twitter.com wrote:
On Thu, Aug 25, 2011
On Tue, Aug 23, 2011 at 10:03 AM, Alvin UW alvi...@gmail.com wrote:
Hello,
As mentioned by Ed Anuff in his blog and slides, one way to build customized
secondary index is:
We use one CF, each row to represent a secondary index, with the secondary
index name as row key.
For example,
You should throttle your compactions to a sustainable level.
-ryan
On Sun, Aug 21, 2011 at 10:22 PM, Hefeng Yuan hfy...@rhapsody.com wrote:
We just noticed that at one time, 4 nodes were doing minor compaction
together, each of them took 20~60 minutes.
We're on 0.8.1, 6 nodes, RF5.
This
2, 2011 at 9:27 AM, Jim Ancona j...@anconafamily.com wrote:
On Mon, Aug 1, 2011 at 6:12 PM, Ryan King r...@twitter.com wrote:
On Fri, Jul 29, 2011 at 12:02 PM, Chris Burroughs
chris.burrou...@gmail.com wrote:
On 07/25/2011 01:53 PM, Ryan King wrote:
Actually I was wrong– our patch will disable
On Fri, Jul 29, 2011 at 12:02 PM, Chris Burroughs
chris.burrou...@gmail.com wrote:
On 07/25/2011 01:53 PM, Ryan King wrote:
Actually I was wrong– our patch will disable gosisp and thrift but
leave the process running:
https://issues.apache.org/jira/browse/CASSANDRA-2118
If people
It'd be great if we had different settings for inter- and intra-DC read repair.
-ryan
On Fri, Jul 29, 2011 at 5:06 PM, Jake Luciani jak...@gmail.com wrote:
Yes it's read repair you can lower the read repair chance to tune this.
On Jul 29, 2011, at 6:31 PM, Aaron Griffith
On Thu, Jul 28, 2011 at 12:08 PM, Stephen Pope stephen.p...@quest.com wrote:
I just finished watching the video by Eric Evans on “CQL – Not just NoSQL.
It’s MoSQL”, and I heard mention of aggregation queries. He said there’s
been some talk about it, and that you guys were calling it
We have a patch somewhere that will kill the node on IOErrors, since
those tend to be of the class that are unrecoverable.
-ryan
On Thu, Jul 7, 2011 at 8:02 PM, Jonathan Ellis jbel...@gmail.com wrote:
Yeah, ideally it should probably die or drop into read-only mode if it
runs out of space.
Actually I was wrong– our patch will disable gosisp and thrift but
leave the process running:
https://issues.apache.org/jira/browse/CASSANDRA-2118
If people are interested in that I can make sure its up to date with
our latest version.
-ryan
On Mon, Jul 25, 2011 at 10:07 AM, Ryan King r
If you're interested in this idea, you should read up about Spinnaker:
http://www.vldb.org/pvldb/vol4/p243-rao.pdf
-ryan
On Mon, Jul 11, 2011 at 2:48 PM, Yang tedd...@gmail.com wrote:
I'm not proposing any changes to be done, but this looks like a very
interesting topic for
On Wed, Jun 29, 2011 at 5:36 AM, Jacob, Arun arun.ja...@disney.com wrote:
if I'm planning to store 20TB of new data per week, and expire all data
every 2 weeks, with a replication factor of 3, do I only need approximately
120 TB of disk? I'm going to use ttl in my column values to automatically
On Fri, Jun 24, 2011 at 6:08 AM, Joseph Stein crypt...@gmail.com wrote:
cool
now that 0.8 is out any chance Rainbird is going to be open sourced?
Not anytime soon. We're busy launching a bunch of stuff (some of which
you'll hear about at CassandraSF).
-ryan
if not then I guess I will be
On Thu, Jun 23, 2011 at 2:05 PM, Les Hazlewood l...@katasoft.com wrote:
Hi Dominic,
Thanks so much for providing this information. I was unaware of Cages and
this looks like it could be used effectively for certain things.
This is because Cassandra uses the timestamps of columns that have
On Thu, Jun 23, 2011 at 2:55 PM, Jeffrey Wang jw...@palantir.com wrote:
Hey all,
We’re running a slightly patched version of 0.7.3 on a cluster of 5 nodes.
I’ve been noticing a number of messages in our logs which look like this
(after a node goes “down” and comes back up, usually just due
On Wed, Jun 22, 2011 at 10:00 AM, Jonathan Colby
jonathan.co...@gmail.com wrote:
Thanks for the explanation. I'm still a bit skeptical.
So if you really needed to control the maximum size of compacted SSTables,
you need to delete data at such a rate that the new files created by
On Wed, Jun 22, 2011 at 2:24 PM, Les Hazlewood l...@katasoft.com wrote:
I'm planning on using Cassandra as a product's core data store, and it is
imperative that it never goes down or loses data, even in the event of a
data center failure. This uptime requirement (five nines: 99.999% uptime)
Even without lsof, you should be able to get the data from /proc/$pid
-ryan
On Fri, Jun 17, 2011 at 5:08 AM, Dominic Williams
dwilli...@system7.co.uk wrote:
Unfortunately I shutdown that node and anyway lsof wasn't installed.
But $ulimit gives
unlimited
On 17 June 2011 13:00, Sylvain
On Thu, Jun 16, 2011 at 8:18 AM, AJ a...@dude.podzone.net wrote:
Good morning all.
Hypothetical Setup:
1 data center
RF = 3
Total nodes 3
Problem:
Suppose I need maximum consistency for one critical operation; thus I
specify CL = ALL for reads. However, this will fail if only 1 replica
On Thu, Jun 16, 2011 at 6:11 AM, Terje Marthinussen
tmarthinus...@gmail.com wrote:
Hi all!
Assuming a node ends up in GC land for a while, there is a good chance that
even though it performs terribly and the dynamic snitching will help you to
avoid it on the gossip side, it will not really
On Thu, Jun 16, 2011 at 1:05 PM, AJ a...@dude.podzone.net wrote:
On 6/16/2011 10:58 AM, Dan Hendry wrote:
I think this would add a lot of complexity behind the scenes and be
conceptually confusing, particularly for new users.
I'm not so sure about this. Cass is already somewhat
On Thu, Jun 16, 2011 at 3:41 PM, E R pc88m...@gmail.com wrote:
Hi all,
As a way of gaining familiarity with Cassandra I am migrating a table
that is currently stored in a relational database and mapping it into
a Cassandra column family. We add about 700,000 new rows a day to this
table, and
On Thu, Jun 16, 2011 at 2:12 PM, AJ a...@dude.podzone.net wrote:
On 6/16/2011 2:37 PM, Ryan King wrote:
On Thu, Jun 16, 2011 at 1:05 PM, AJa...@dude.podzone.net wrote:
snip
The Cassandra consistency model is pretty elegant and this type of
approach breaks that elegance in many ways
There's a ticket open to address this:
https://issues.apache.org/jira/browse/CASSANDRA-1974
-ryan
On Wed, Jun 15, 2011 at 8:49 AM, Terje Marthinussen
tmarthinus...@gmail.com wrote:
On Thu, Jun 16, 2011 at 12:48 AM, Terje Marthinussen
tmarthinus...@gmail.com wrote:
Even if the gc call
There's a ticket open for this:
https://issues.apache.org/jira/browse/CASSANDRA-2521. Vote on it if
you think its important.
-ryan
On Wed, Jun 15, 2011 at 7:34 PM, Jeffrey Kesselman jef...@gmail.com wrote:
The GC cleanup approach, if depending on specific objects being GCd,
is fundamentally
On Tue, Jun 14, 2011 at 8:16 AM, Schuilenga, Jan Taeke
jantaeke.schuile...@ocwduo.nl wrote:
Hi All,
We are having issues testing Cassandra in a virtualized environment (Vmware
ESX).
Our challenge is to combine a high number of concurrent users with a very
low maximum response time.
On Thu, Jun 9, 2011 at 12:41 PM, Ian Holsman had...@holsman.net wrote:
Hi.
I had a brief look at CASSANDRA-2103 (expiring counter columns), and I was
wondering if anyone can help me with my problem.
I want to keep some page-view stats on a URL at different levels of
granularity (page
On Thu, Jun 9, 2011 at 1:06 PM, Ian Holsman had...@holsman.net wrote:
Hi Ryan.
you wouldn't have your version of cassandra up on github would you??
No, and the patch isn't in our version yet either. We're still working on it.
-ryan
On Mon, Jun 6, 2011 at 6:09 AM, Terje Marthinussen
tmarthinus...@gmail.com wrote:
Of course I talked too soon.
I saw a corrupted commitlog some days back after killing cassandra and I
just came across a committed hints file after a cluster restart for some
config changes :(
Will look into
On Sun, May 22, 2011 at 11:00 AM, Yang tedd...@gmail.com wrote:
Thanks,
I did read through that pdf doc, and went through the counters code in
0.8-rc2, I think I understand the logic in that code.
in my hypothetical implementation, I am not suggesting to overstep the
complicated logic
On Mon, May 23, 2011 at 12:06 PM, Yang tedd...@gmail.com wrote:
Thanks Ryan,
could you please share more details: according to what you observed in
testing, why was performance worse if you do not do extra buffering?
I was thinking (could be wrong) that without extra buffering, the
Maybe. We haven't really tested it without buffering and probably
won't anytime soon. 1 minute latency is good enough for what we're
doing.
On Mon, May 23, 2011 at 1:58 PM, Jeremy Hanna
jeremy.hanna1...@gmail.com wrote:
On May 23, 2011, at 2:23 PM, Ryan King wrote:
On Mon, May 23, 2011 at 12
That's the same as the last one. The token space is a circle so the
last one at the list is repeated at the top.
-ryan
On Fri, May 13, 2011 at 9:59 AM, Scott McPheeters
smcpheet...@healthx.com wrote:
Has anyone seen this and know if it is causing an issue or how to fix
it? Anytime I run
On Tue, Apr 12, 2011 at 7:16 PM, Jeremy Hanna
jeremy.hanna1...@gmail.com wrote:
As some may have heard, CQL is going to be in 0.8. It's a level of
abstraction that will hopefully make the lives of client developers
substantially easier. The ideal is to make it so client devs only need to do
On Mon, Apr 11, 2011 at 10:35 AM, Chris Burroughs
chris.burrou...@gmail.com wrote:
To avoid taking my own thread [1] off on a tangent. Does anyone have a
reccomendation for a tool to graphical analysis (ie make useful graphs)
out of hoptspot gc logs? Google searches have turned up several
On Wed, Apr 6, 2011 at 11:49 PM, Ross Black ross.w.bl...@gmail.com wrote:
Hi,
I am using the thrift client batch_mutate method with Cassandra 0.7.0 on
Ubuntu 10.10.
When the size of the mutations gets too large, the client fails with the
following exception:
Caused by:
We have a solution for time series data on cassandra at Twitter that
we'd like to open source, but it requires 0.8/trunk so we're not going
to release it until that's stable.
See
http://www.slideshare.net/kevinweil/rainbird-realtime-analytics-at-twitter-strata-2011
-ryan
On Thu, Mar 31, 2011
On Mon, Mar 21, 2011 at 4:02 AM, pob peterob...@gmail.com wrote:
Hi,
I'm inserting data from client node with stress.py to cluster of 6 nodes.
They are all on 1Gbps network, max real throughput of network is 930Mbps
(after measurement).
python stress.py -c 1 -S 17 -d{6nodes} -l3 -e
On Mon, Feb 28, 2011 at 9:24 AM, Flachbart, Dirk (HP Software -
TransactionVision) dirk.flachb...@hp.com wrote:
Hi,
We are trying to use Cassandra for high-performance insertion of simple
key/value records. I have set up Cassandra on two of my machines in my local
network (Windows 2008
On Mon, Feb 28, 2011 at 2:05 PM, Flachbart, Dirk (HP Software -
TransactionVision) dirk.flachb...@hp.com wrote:
Replication factor is set to 1, and I'm using ConsistencyLevel.ANY. And yep,
I tried doubling the threads from 16 to 32 when running with the second
server, didn't make a
On Fri, Feb 11, 2011 at 2:06 AM, Patrik Modesto
patrik.mode...@gmail.com wrote:
Hi all!
I'm thinking if size of a column name could matter for a large dataset
in Cassandra (I mean lots of rows). For example what if I have a row
with 10 columns each has 10 bytes value and 10 bytes name. Do I
On Sat, Feb 5, 2011 at 10:12 PM, Joshua Partogi joshua.j...@gmail.com wrote:
Hi,
I don't know whether my assumption is right or not. When I tried to insert a
Time value into a column I am getting this exception:
vendor/ruby/1.8/gems/thrift-0.5.0/lib/thrift/protocol/binary_protocol.rb:106:in
On Thu, Feb 3, 2011 at 9:12 PM, Aklin_81 asdk...@gmail.com wrote:
Thanks Matthew Ryan,
The main inspiration behind me trying to generate Ids in sequential
manner is to reduce the size of the userId, since I am using it for
heavy denormalization. UUIDs are 16 bytes long, but I can also have a
On Fri, Feb 4, 2011 at 1:45 PM, Oleg Proudnikov ol...@cloudorange.com wrote:
Hi All,
I have a 3 server cluster with RF=2. My heap is 2G out of a 4G RAM. The
servers
have 4 cores. I used default heap settings. The Eden space ended up around 60M
and the Survivor spaces are around 7M. This
You could also consider snowflake:
http://github.com/twitter/snowflake
which gives you ids that roughly sort by time (but aren't sequential).
-ryan
On Thu, Feb 3, 2011 at 11:13 AM, Matthew E. Kennedy
matt.kenn...@spadac.com wrote:
Unless you need your user identifiers to be sequential for
On Wed, Feb 2, 2011 at 6:22 AM, Chris Burroughs
chris.burrou...@gmail.com wrote:
On 01/28/2011 09:19 PM, Chris Burroughs wrote:
Thanks Oleg and Zhu. I swear that wasn't a new hotspot version when I
checked, but that's obviously not the case. I'll update one node to the
latest as soon as I
On Wed, Feb 2, 2011 at 10:29 AM, Chris Burroughs
chris.burrou...@gmail.com wrote:
On 02/02/2011 12:49 PM, Ryan King wrote:
We're seeing a similar problem with one of our clusters (but over a
longer time scale). Its possible that its not a leak, but just
fragmentation. Unless you've told
On Wed, Feb 2, 2011 at 10:40 AM, Chris Burroughs
chris.burrou...@gmail.com wrote:
I'm using 0.7.0 and experimenting with the new mx4j support.
http://host:port/mbean?objectname=org.apache.cassandra.request%3Atype%3DReadStage
Returns a nice pretty html page. For purposes of monitoring I would
Not open source, but here's a preso on how simplegeo do it:
http://www.slideshare.net/mmalone/scaling-gis-data-in-nonrelational-data-stores
Note: we do it very differently here at Twitter (but aren't at liberty
to discuss in detail)– I say this just to point out that there are
several valid
On Fri, Jan 21, 2011 at 12:24 PM, Joseph Stein crypt...@gmail.com wrote:
Thanks Ryan, Jake and Mike for the quick responses.
I will mull through this weekend between engineering things from scratch or
going the Solr/Solandra route as Jake points out is an option (and the
effort/time related
Not sure what you mean by document mapper, but CassandraObject might
fit the bill: https://github.com/nzkoz/cassandra_object
-ryan
On Wed, Jan 19, 2011 at 11:03 PM, Joshua Partogi joshua.j...@gmail.com wrote:
Hi all,
Is anyone aware of a document mapper for Ruby similar to MongoMapper?
On Sun, Jan 16, 2011 at 6:53 AM, David Boxenhorn da...@lookin2.com wrote:
If I delete a row, and later on delete it again, before GCGraceSeconds has
elapsed, does the tombstone live longer?
Each delete is a new tombstone, which should answer your question.
-ryan
In other words, if I have the
I'm not sure if this is entirely true, but I *think* older version of
cassandra used a version of the ConcurrentLinkedHashmap (which backs
the row cache) that used the Second Chance algorithm, rather than LRU,
which might explain this non-LRU-like behavior. I may be entirely
wrong about this
On Thu, Jan 13, 2011 at 2:38 PM, Victor Kabdebon
victor.kabde...@gmail.com wrote:
Dear all,
In a project I would like to store big objects in columns, serialized. For
example entire images (several Ko to several Mo), flash animations (several
Mo) etc...
Does someone use Cassandra with those
On Thu, Jan 13, 2011 at 2:44 PM, Victor Kabdebon
victor.kabde...@gmail.com wrote:
Is there any recommanded maximum size for a Column ? (not the very upper
limit which is 2Gb)
Why is it useful to chunk the content into multiple columns ?
I think you're going to have to do some tests yourself.
On Wed, Jan 12, 2011 at 2:00 PM, mck m...@apache.org wrote:
I'm using 0.7.0-rc3, 3 nodes, RF=3, and ByteOrderedPartitioner.
When i run nodetool ring it reports
Address Status State Load Owns Token
On Wed, Jan 12, 2011 at 2:08 PM, mck m...@apache.org wrote:
You're using an ordered partitioner and your nodes are evenly spread
around the ring, but your data probably isn't evenly distributed.
This load number seems equals to `du -hs data_file_directories` and
since i've got N == RF
Awesome and great to see you're using our fauna cassandra gem. :)
-ryan
On Tue, Jan 11, 2011 at 10:18 AM, Mike Wynholds m...@carbonfive.com wrote:
Happy new year all-
I just wanted to mention that I have released a new Cassandra data
management gem called ActiveColumn. The first major
On Tue, Jan 4, 2011 at 12:50 PM, vicent roca daniel sap...@gmail.com wrote:
I'm getting more consistent results using Time.stamp instead of Time
From: https://github.com/fauna/cassandra/blob/master/lib/cassandra/long.rb
Yeah, you were probably overwriting values then.
-ryan
On Sun, Jan 2, 2011 at 3:45 PM, vicent roca daniel sap...@gmail.com wrote:
Hi guys, I need your help.
I'm trying to insert a column name of type LongType using the ruby wrapper,
but I can't get it working.
What I'm trying is something like this:
app.insert(:Data, 'device1-cpu', { Time.now
'
from (irb):6
from /Users/armandolalala/.rvm/rubies/ruby-1.9.2-p0/bin/irb:17:in `main'
On Mon, Jan 3, 2011 at 10:06 PM, Ryan King r...@twitter.com wrote:
On Mon, Jan 3, 2011 at 12:56 PM, vicent roca daniel sap...@gmail.com
wrote:
Hi again!
code:
require 'rubygems'
require 'cassandra
Are you creating a new connection for each row you insert (and if so
are you closing it)?
-ryan
On Wed, Dec 15, 2010 at 8:13 AM, Amin Sakka, Novapost
amin.sa...@novapost.fr wrote:
Hello,
I'm using cassandra 0.7.0 rc1, a single node configuration, replication
factor 1, random partitioner, 2 GO
On Tue, Dec 14, 2010 at 7:14 AM, Alberto Velandia
betovelan...@gmail.com wrote:
Hi has anyone noticed that the documentation for the Cassandra Class is gone
from the website?
http://blog.evanweaver.com/2010/12/06/cassandra-0-8/
http://rdoc.info/gems/cassandra will always have the latest
Overall, I don't think this is a crazy idea, though I think I'd prefer
cassandra to manage this setup.
The problem you will run into is that because the storage port is
assumed to be the same across the cluster you'll only be able to do
this if you can assign multiple IPs to each server (one for
I just pushed a 0.9.0 release of the fauna-cassandra ruby client. This
is our first release that includes support for Cassandra 0.7
(currently supporting RC1 and not earlier 0.7 releases).
code/download: https://rubygems.org/gems/cassandra
git: http://github.com/fauna/cassandra
File any bugs on
Note that there's not really anything special about the seed node and its
all relative– the cluster doesn't necessarily have to agreed on who the
seeds are.
So, to bring up a new node to replace the old seed, just set the new node's
seed to any existing node in the system. After that you can go
Please file this on github issues:
https://github.com/fauna/cassandra/issues. And I'll get to it soon.
-ryan
On Tue, Dec 7, 2010 at 2:21 AM, Joshua Partogi joshua.j...@gmail.com wrote:
Hi,
I pull out fauna/cassandra gem 0.10.0 from github.
I then tried to get a value from cassandra as such.
On Tue, Dec 7, 2010 at 1:07 PM, Eric Gilmore e...@riptano.com wrote:
What would comprise a sane and reasonably balanced list? Should there be a
certain proportion of seeds per total nodes? Any other considerations
besides a) list must be identical on all nodes and b) you can't
We're going to be hosting people at the Twitter offices the evening of
December 13th to focus on testing 0.7. If you're interested please
contact me offlist and I'll add you to the invite. Note that we're
trying to keep the group small and focused.
-ryan
It would help if you give us more context. The code snippet you've
given us is incomplete and not very helpful.
-ryan
On Mon, Dec 6, 2010 at 12:33 PM, Alberto Velandia
betovelan...@gmail.com wrote:
Hi I've successfully managed to connect to the server through the
cassandra-cli command but
On Fri, Nov 12, 2010 at 7:33 AM, Aditya Muralidharan
aditya.muralidha...@nisc.coop wrote:
Thanks for the response. We're trying to get a general idea of the insert and
retrieval performance, and we figured BinaryMemtable would be a great enabler
for our bulk import scenarios. Normal thrift
Yeah, that's really microsecond latency. Note, though that this isn't
the full request timing, its just the storage proxy down, so it
doesn't account for any latency added by thrift or the network.
-ryan
On Wed, Nov 10, 2010 at 1:43 PM, Rock, Paul paul.r...@teamaol.com wrote:
Afternoon all -
On Tue, Nov 2, 2010 at 1:28 AM, Daniel Doubleday
daniel.double...@gmx.net wrote:
Hi all
had some time yesterday to dig a lil deeper. And maybe this saves someone who
made the same mistake the time so ...
After trying to reproduce the problem in unit tests with the same data which
led
On Tue, Oct 5, 2010 at 8:23 AM, Ian Rogers ian.rog...@contactclean.com wrote:
Does Cassandra have an atomic test-or-set operation?
That is, I want to check to see if a key has a value and, if not, set it to
something. But it must be an atomic operation - I can't do a separate fetch
and then
On Thu, Sep 30, 2010 at 1:08 PM, Gabor Torok
gabor.to...@sunpowercorp.com wrote:
I added a comment to an existing issue:
https://issues.apache.org/jira/browse/AVRO-537
Cool. I'll work with Jeff (who sits about 10 feet from me) to get this fixed. :)
-ryan
On Tue, Sep 28, 2010 at 4:06 PM, Gabor Torok
gabor.to...@sunpowercorp.com wrote:
Hi,
I'm attempting to use avro to talk to cassandra because the ruby thrift
client's read performance is pretty bad (I measured 4x slower than java).
However, I run into a problem when calling multiget_slice.
On Tue, Sep 28, 2010 at 4:06 PM, Gabor Torok
gabor.to...@sunpowercorp.com wrote:
Hi,
I'm attempting to use avro to talk to cassandra because the ruby thrift
client's read performance is pretty bad (I measured 4x slower than java).
Only 4x feels like a win. :)
One thing you should try is to
Looks like you need to do some load balancing.
-ryan
On Wed, Aug 25, 2010 at 12:33 AM, john xie shanfengg...@gmail.com wrote:
/opt/apache-cassandra-0.6.4/bin/nodetool --host 192.168.123.100 ring
Address Status Load Range
Ring
162027259805094200094770502377853667196
On Wed, Aug 25, 2010 at 11:20 AM, Petr Odut petr.o...@gmail.com wrote:
Hi,
I've read about pagination in cassandra. My current implementation is
get_range_slices with startKey = lastKey + 1, but I need to get the
specified page directly. Is it any chance to do this?
If you look at twitter,
On Tue, Aug 17, 2010 at 10:55 AM, Artie Copeland yeslinux@gmail.com wrote:
if i set a key cache size of 100% the way i understand how that works is:
- the cache is not write through, but read through
- a key gets added to the cache on the first read if not already available
- the size of
On Thu, Aug 12, 2010 at 9:08 AM, Julie julie.su...@nextcentury.com wrote:
I am chasing down a row size discrepancy and am confused.
I populated a single node Cassandra cluster with 10,000 rows of data, using
numeric keys 1-10,000, where each row is a little over 100kB in length and has
a
On Tue, Aug 10, 2010 at 8:43 PM, Arya Asemanfar aryaaseman...@gmail.com wrote:
I mentioned this today to a couple folks at Cassandra Summit, and thought
I'd solicit some more thoughts here.
Currently, the read stage includes checking row cache. So if your concurrent
reads is N and you have N
Make sure the client and server are both using the same transport
(framed vs. non)
-ryan
On Fri, Aug 6, 2010 at 9:47 AM, Mark static.void@gmail.com wrote:
Has anyone had any success using Cassandra 0.7 w/ ruby? I'm attempting to
use the fauan/cassandra gem
On Fri, Aug 6, 2010 at 9:57 AM, Mark static.void@gmail.com wrote:
Wow.. fast answer AND correct. In Cassandra.yml
# Frame size for thrift (maximum field length).
# 0 disables TFramedTransport in favor of TSocket.
thrift_framed_transport_size_in_mb: 15
I just had to change that value to
On Tue, Jul 20, 2010 at 6:20 AM, Juho Mäkinen juho.maki...@gmail.com wrote:
I managed to run a few benchmarks.
Servers r/s
1 64.5k
2 59.5k
The configuration:
Client: Machine with four Quad Core Intel Xeon CPU E5520 @ 2.27Ghz
cpus (total 16 cores), 4530 bogomips per
On Tue, Jul 20, 2010 at 1:28 PM, Peter Schuller
peter.schul...@infidyne.com wrote:
Attaching Jconsole shows that there is a growth of memory and weird
spikes. Unfortunately I did not take a screen shot of the growth of
the spike over time. I'll do that when it occurs again.
Note that expected
On Mon, Jul 19, 2010 at 11:02 AM, David Schoonover
david.schoono...@gmail.com wrote:
Multiple client processes, or multiple client machines?
I ran it with both one and two client machines making requests, and ensured
the sum of the request threads across the clients was 50. That was on the
On Sat, Jul 10, 2010 at 10:33 AM, Marty Greenia martygree...@gmail.com wrote:
It almost seems counter-intuitive. For analytics, you'd think they'd want a
database that supports more sophisticated query functionality (sql). Whereas
for everyday tweet storage, something fast and high-throughput
On Tue, Jun 29, 2010 at 9:42 AM, Utku Can Topçu u...@topcu.gen.tr wrote:
Hey Guys,
Currently in a project I'm involved in, I need to have some columns holding
incremented data.
The easy approach for implementing a counter with increments is right now as
I figured out is read - increment -
On Mon, Jun 28, 2010 at 9:35 AM, Chris Goffinet c...@chrisgoffinet.com wrote:
Digg is not forking Cassandra. We use 0.6 for production, with a few
in-house patches (related to our infrastructure). The biggest difference
with our branch and apache 0.6 branch is we have the work Kelvin and
On Sat, Jun 19, 2010 at 9:30 AM, Christian van der Leeden
christian.vanderlee...@googlemail.com wrote:
Hi Thomas,
did you look at cassandra gem from twitter (fauna/cassandra) on github?
They also use the thrift_client and already have the basic cassandra API
accessible.
I'm also
On Tue, May 25, 2010 at 9:06 AM, Fernanda Foertter
fernanda.foert...@pic.com wrote:
Hi everyone,
So we have Panasas (http://www.panasas.com), and want to avoid local drives.
Because panasas has its own redundancy and cache, Can I set RF=1? If so,
can you think of any reason why we shouldn’t
Also, timestamps for each column.
-ryan
On Tue, May 25, 2010 at 5:41 AM, Jonathan Ellis jbel...@gmail.com wrote:
That's true. But fundamentally Cassandra is expected to use more
space than mysql for a few reasons; usually the biggest factor is that
Cassandra has to write out each column name
On Fri, May 14, 2010 at 11:46 AM, S Ahmed sahmed1...@gmail.com wrote:
realizing cassandra might be a little tricky to setup at first due to lack
of docs etc.
Once it is up and running/humming, is it a hands-off solution or does it
require hand-holding/monitoring?
I recall Joe Stump's blog
It's a bug:
https://issues.apache.org/jira/browse/CASSANDRA-1079
-ryan
On Wed, May 12, 2010 at 8:16 AM, James Golick jamesgol...@gmail.com wrote:
When I first brought this cluster online, the storage-conf.xml file had a
few cache capacities set. Since then, we've completely changed how we use
On Wed, Apr 28, 2010 at 12:12 PM, Kyusik Chung kyu...@discovereads.com wrote:
Hello. I am using Cassandra 0.6.1 on ubuntu 8.04. 3 node cluster.
I notice that when I start making lots of read requests (serially), memory
usage of jsvc keeps climbing until it uses up all memory on the server
On Tue, Apr 27, 2010 at 1:31 PM, Lucas Di Pentima
lu...@di-pentima.com.ar wrote:
Thanks Ryan for the fast response! Can you explain to me why binding against
127.0.0.1 causes the problem? Maybe it's useful to point this out in the
documentation to avoid users deploy this kind of setups.
Are
On Tue, Apr 27, 2010 at 1:38 PM, Lucas Di Pentima
lu...@di-pentima.com.ar wrote:
Nope, I'm doing some tests locally on my notebook (Macbook OSX 10.6.3 w/4GB
RAM). My script insert several hundred thousand columns with stable speed,
and then it exits throwing that exception.
Its possible
On Tue, Apr 27, 2010 at 2:29 PM, Lucas Di Pentima
lu...@di-pentima.com.ar wrote:
El 27/04/2010, a las 18:11, Ryan King escribió:
On Tue, Apr 27, 2010 at 1:38 PM, Lucas Di Pentima
lu...@di-pentima.com.ar wrote:
Nope, I'm doing some tests locally on my notebook (Macbook OSX 10.6.3 w/4GB
RAM
I would recommend using RAID-0 rather that multiple data directories.
-ryan
2010/4/26 Roland Hänel rol...@haenel.me:
I have a configuration like this:
DataFileDirectories
DataFileDirectory/storage01/cassandra/data/DataFileDirectory
1 - 100 of 110 matches
Mail list logo
