Cassandra.new(keyspace, server, {:protocol =
Thrift::BinaryProtocolAccelerated})
On Tue, Nov 16, 2010 at 5:13 PM, Ryan King r...@twitter.com wrote:
On Tue, Nov 16, 2010 at 10:25 AM, Jonathan Ellis jbel...@gmail.com wrote:
On Tue, Sep 28, 2010 at 6:35 PM, Ryan King r...@twitter.com wrote:
One
As part of my continuous abuse of a small cluster for Chef cookbook
development, I've run across a strange issue I'm hoping someone can
explain. The following is output after upgrading from beta2 to beta3
and running nodetool rebalance on .140.224:
Address Status Load Range
Looking at db/SystemTable.java I see the use of Bootstrap as a token
during bootstrap, but it seems to be for the system table, not other
keyspaces. Is it used more generally than that or is this a bug?
On Sun, Mar 21, 2010 at 11:29 PM, Benjamin Black b...@b3k.us wrote:
As part of my continuous
Could've misread it, it was late. Regardless, seems this should never happen.
On Mon, Mar 22, 2010 at 6:19 AM, Gary Dusbabek gdusba...@gmail.com wrote:
On Mon, Mar 22, 2010 at 01:58, Benjamin Black b...@b3k.us wrote:
Looking at db/SystemTable.java I see the use of Bootstrap as a token
during
https://www.cloudkick.com/blog/2010/mar/02/4_months_with_cassandra/
On Mon, Mar 22, 2010 at 6:51 AM, Hill, Ed A ed-h...@uiowa.edu wrote:
I've been through the twissandra data model as well and it is pretty
straightforward and well explained (thanks!) - but I notice that a number of
the folks
Maybe I missed this: what replication factor and consistency level are
you using?
2010/3/21 郭鹏 gpcus...@gmail.com:
Thx, I will try it in the multi-thread mode.
What's the best practice in the production env?
在 2010年3月21日 下午12:04，Jonathan Ellis jbel...@gmail.com写道：
If you're benchmarking
Cassandra is not being used to generate the Twitter identifiers.
Twitter, like most places using Cassandra, has more than one database
system in production.
UUIDs are not at risk of conflicts with billions of rows.
b
On Thu, Mar 25, 2010 at 5:57 AM, Jaepil Jeong zgdr...@gmail.com wrote:
Hi
Erez,
To make this work you have to make your model fit Cassandra, not the
other way around. As a rule, you either do complex queries via client
code to process the results of several, simpler queries or via a CF
you create to act as an index. Yes, this means you have to write data
to each
Just added this to the wiki as it seemed a very frequent request on
irc: http://wiki.apache.org/cassandra/MultinodeCluster
Would very much appreciate feedback and edits to improve it.
b
on making the thrift interface
listening on more than localhost.
Kind regards,
Benoit.
2010/4/3 Benjamin Black b...@b3k.us:
Just added this to the wiki as it seemed a very frequent request on
irc: http://wiki.apache.org/cassandra/MultinodeCluster
Would very much appreciate feedback and edits
the other day. One question
I'm still unclear on, when setting up multiple nodes, say 4-8 (or more)
what's the suggested ratio of seed vs. non-seed nodes?
thanks,
Joe
On Apr 3, 2010, at 1:14 AM, Benjamin Black wrote:
Just added this to the wiki as it seemed a very frequent request
config to all nodes.
On Sat, Apr 3, 2010 at 3:14 AM, Benjamin Black b...@b3k.us wrote:
Just added this to the wiki as it seemed a very frequent request on
irc: http://wiki.apache.org/cassandra/MultinodeCluster
Would very much appreciate feedback and edits to improve it.
b
Seems like a lot of complexity for a very small win (how often do you
bootstrap new nodes? if you only need a handful of seeds, what's all
that hard about listing them all on all nodes?). I prefer simple and
predictable, and trying to do this with round robin DNS seems to be
neither, to me.
b
as 'placement_availability_zone', avoiding
the need to speak the EC2 API or store credentials in the configs.
b
On Sat, Apr 3, 2010 at 2:45 PM, Joe Stump j...@joestump.net wrote:
On Apr 3, 2010, at 1:53 PM, Benjamin Black wrote:
What specific features are you looking for to operate on EC2
wrote:
On Apr 3, 2010, at 2:54 PM, Benjamin Black wrote:
I'm pretty familiar with EC2, hence the question. I don't believe any
patches are required to do these things. Regardless, as I noted in
that ticket, you definitely do NOT need AWS credentials to determine
your availability zone
On Sat, Apr 3, 2010 at 8:23 PM, Mike Gallamore
mike.e.gallam...@googlemail.com wrote:
I didn't mean a real time determination, more of if the nodes aren't
identical. For example if you have a cluster made up of a bunch of EC2 light
instances and decide to add a large instance, it would be
On Sun, Apr 4, 2010 at 8:42 PM, Paul Prescod pres...@gmail.com wrote:
On Sun, Apr 4, 2010 at 5:06 PM, Benjamin Black b...@b3k.us wrote:
...
Are you suggesting this would give you counter semantics?
Yes: My understanding of cassandra-580 is that it gives you increment
and decrement which
You are blowing away the mostly saner JVM_OPTS running it that way.
Edit cassandra.in.sh (or wherever config is on your system) to
increase mx to 4G (not 6G, for now) and leave everything else
untouched and do not specify JVM_OPTS on the command line. See if you
get the same behavior.
b
On
I'd suggest you use RandomPartitioner, an index, and multiget. You'll
be able to do range queries and won't have the load imbalance and
performance problems of OPP and native range queries.
b
On Wed, Apr 7, 2010 at 3:51 AM, Paul Prescod p...@prescod.net wrote:
I have one append-oriented
SCF rows are loaded in their entirety into memory, so the limit
applies in the same way.
On Wed, Apr 7, 2010 at 5:16 PM, Jeremy Davis
jerdavis.cassan...@gmail.com wrote:
Quick question:
There is an open issue with ColumnFamilies growing too large to fit in
memory when compacting..
Does this
...@gmail.com wrote:
Then from an IT standpoint, if i'm using a RF of 3, it stands to reason that
running on Raid 1 makes sense, since RAID and RF achieve the same ends... it
makes sense to strip for speed and let cassandra deal with redundancy, eh?
On Wed, Apr 7, 2010 at 4:07 PM, Benjamin Black b
is for this software... and whats to be avoided
because its a given that it dosnt work.
On Wed, Apr 7, 2010 at 6:40 PM, Benjamin Black b...@b3k.us wrote:
That depends on your goals for fault tolerance and recovery time. If
you use RAID1 (or other redundant configuration) you can tolerate disk
failure
On Thu, Apr 8, 2010 at 12:55 AM, Paul Prescod p...@ayogo.com wrote:
¹ http://jsensarma.com/blog/2009/11/dynamo-part-i-a-followup-and-re-rebuttals/
Pay no attention to this disingenuous troll.
b
Yes. Or you would retry the write. Either way, the system achieves
consistency eventually, hence the name.
On Thu, Apr 8, 2010 at 9:36 AM, Mark Greene green...@gmail.com wrote:
So unless you re-try the write, the previous stale write stays on the other
two nodes? Would a read repair fix this
His arguments consistently (hah!) boil down to this: if you
misconfigure things for your intended application, you get undesirable
behavior. For example, the correct approach to the situation cited is
to use quorum reads and writes. W=3/R=1/N=3 might be appropriate for
situations in which you
Strange setup, but, ok. What is your ThriftAddress setting on the
Windows machine?
On Thu, Apr 8, 2010 at 11:44 AM, Sonny Heer sonnyh...@gmail.com wrote:
I have two boxes. One is a windows box running Cassandra .6, and the
other is an ubuntu box from which I'm trying to run the word count
Are you actually trying to make the Ubuntu system another node in the
ring? While the first node is only listening on localhost? There's
your problem.
On Thu, Apr 8, 2010 at 11:44 AM, Sonny Heer sonnyh...@gmail.com wrote:
I have two boxes. One is a windows box running Cassandra .6, and the
connecting.
On Thu, Apr 8, 2010 at 11:58 AM, Sonny Heer sonnyh...@gmail.com wrote:
Single node cluster (the windows box). the Ubuntu box is only used to
run the word count
On Thu, Apr 8, 2010 at 11:54 AM, Benjamin Black b...@b3k.us wrote:
Are you actually trying to make the Ubuntu system another node
You would have a Column Family, not a column for that; let's call it
the Users CF. You'd use username as the row key and have a column
called 'password'. For your example query, you'd retrieve row key
'usr2', column 'password'. The general pattern is that you create CFs
to act as indices for
123456 - column name
value - 123456
I m thinking of doing it this way for my applicaton, this way i can run
different sorts of queries too. Any feedback on this is welcome.
On Sun, Apr 11, 2010 at 1:13 PM, Benjamin Black b...@b3k.us wrote:
You would have a Column Family
example is clear this time. Should you have any queries feel free
to revert.
On Sun, Apr 11, 2010 at 2:01 PM, Benjamin Black b...@b3k.us wrote:
Sorry, I don't understand your example.
On Sun, Apr 11, 2010 at 12:54 AM, Lucifer Dignified
vineetdan...@gmail.com wrote:
Benjamin I quite agree
, I think every idea or experience should be shared with the
community.
I hope I example is clear this time. Should you have any queries feel free
to revert.
On Sun, Apr 11, 2010 at 2:01 PM, Benjamin Black b...@b3k.us wrote:
Sorry, I don't understand your example.
On Sun, Apr 11, 2010 at 12
. This is just a thought that has come to my mind while trying to
design my db for cassandra.
On Sun, Apr 11, 2010 at 11:46 PM, Benjamin Black b...@b3k.us wrote:
Row keys must be unique. If your usernames are not unique and you
want to be able to query on them, you either need to figure out
On Sun, Apr 11, 2010 at 12:10 PM, vineet daniel vineetdan...@gmail.com wrote:
I assume that using the key i can get the all the columns like an array. Now
i'd be using php to extract arraykey=value in that array, just want to
avoid that i.e i can directly print the column names.
It doesn't
http://wiki.apache.org/cassandra/FAQ#range_ghosts
On Sun, Apr 11, 2010 at 5:12 PM, Kevin Wiggen kwig...@xythos.com wrote:
I have spent the last few days playing with Cassandra and I have attempted
to create a simple Java-Thrift-Cassandra Discussion Group Server
(because the world needs
On Mon, Apr 12, 2010 at 4:27 PM, Time Less timelessn...@gmail.com wrote:
With this formula, we can already begin to formulate more useful answers to
the question. 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
On Tue, Apr 13, 2010 at 10:48 AM, Time Less timelessn...@gmail.com 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.
On Tue, Apr 13, 2010 at 11:31 AM, Paul Prescod pres...@gmail.com wrote:
I am just checking math, not model.
On Tue, Apr 13, 2010 at 10:48 AM, Time Less timelessn...@gmail.com wrote:
numRowsOnNode = 10B / 20 = 500M.
50 million
10B / 20 is 500M. The rest of the analysis from our
On Tue, Apr 13, 2010 at 11:55 AM, Paul Prescod pres...@gmail.com 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
FYI, G1 has been in 1.6 since u14.
2010/4/13 Peter Schüller sc...@spotify.com:
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.
Got it, thanks
2010/4/13 Peter Schüller sc...@spotify.com:
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
Have a look at locator/DatacenterShardStrategy.java.
On Thu, Apr 15, 2010 at 8:16 AM, Ran Tavory ran...@gmail.com wrote:
I'm reading this on this
page http://wiki.apache.org/cassandra/ArchitectureInternals :
AbstractReplicationStrategy controls what nodes get secondary, tertiary,
etc.
If you are trying to run on machines with less than 1GB of memory, or
OS resource limits that prevent allocation of 1GB of memory, that is
what happens. You shouldn't be increasing -Xms, you should be
decreasing -Xmx. Try -Xms16M -Xmx500M.
b
On Sun, Apr 18, 2010 at 2:30 PM, Soichi Hayashi
Are you deleting data through the API or just doing a bunch of inserts
and then running a compaction? The latter will not result in anything
to clean up since data must be explicitly deleted.
b
On Tue, Apr 20, 2010 at 10:33 AM, B. Todd Burruss bburr...@real.com wrote:
i'm trying to draw some
I can't answer for its sanity, but I would not do it that way. I'd
have a CF for Emails, with 1 email per row, and another CF for
UserEmails with per-user index rows referencing the Emails rows.
b
On Tue, Apr 20, 2010 at 9:44 AM, Mark Jones mjo...@imagehawk.com wrote:
To make sure I'm clear
On Tue, Apr 20, 2010 at 11:54 AM, Mark Jones mjo...@imagehawk.com wrote:
When I look at this arrangement, I see one lookup by key for the user,
followed by a large read for all the email indexes (these are all columns
in the same row, right?)
Then one lookup by key for each email
Live nodes that have tokens indicating they should receive a copy of
data count towards write quorum. This means if a node is down (not
decommissioned) the copy sent to the node acting as the hinted handoff
replica will not count towards achieving quorum. If a token is moved,
it is moved. It is
My comment on this post:
This is an interesting start to performance testing these systems,
but raises many more questions than it answers. I am disappointed you
chose not to investigate the enormous, unexplained spreads in
performance for either system tested, nor to attempt to adjust tuning
The performance you are describing is completely abnormal. The first
step in troubleshooting it is profiling your client behavior because
that is almost certainly where the problem is. Where is it spending
its time? If that ultimately indicates it is really waiting on
Cassandra, you can turn
The functionality of a WHERE clause usually means maintaining an
inverted index, usually another CF, on the information of interest
(ses_tstamp in your example). You then retrieve index rows from that
CF to find the data rows.
b
On Wed, May 12, 2010 at 5:34 AM, Moses Dinakaran
Mongo has a rich query API and a weak distribution/replication story.
Cassandra has a narrow (read: weak) query API and a strong
distribution/replication story. If you want really shallow learning
curve, easy querying, etc, won't have that much data, and are handy
with the typical master/slave
On Thu, May 13, 2010 at 12:45 PM, Miguel Verde miguelitov...@gmail.com wrote:
I also think that's not a good design, but only because the typical query
would have to hit several column families instead of just one.
This is completely normal in a columnar store. You query at least one
index
http://wiki.apache.org/cassandra/MultinodeCluster
On Thu, Jun 3, 2010 at 1:07 PM, Stephan Pfammatter
stephan.pfammat...@logmein.com wrote:
I’m having difficulties setting up a 3 way cassandra cluster. Any
comments/help would be appreciated.
My goal is that all data should be fully
On Fri, Jun 4, 2010 at 10:36 AM, Philip Stanhope pstanh...@wimba.com wrote:
Here's the scenario: would like R = N where N is the number of nodes. Let's
say 8.
1. Create first node, modify storage-conf.xml and change the Seed/ to be
the ip of the node. Change replication factor to 8 for CF
On Fri, Jun 4, 2010 at 11:04 AM, Philip Stanhope pstanh...@wimba.com wrote:
I am contemplating a situation where there may be 2N servers ... but only N
online at any one time. But, for operational purposes, N+n (where n is 1 or
2), N may be occasionally greater than R.
Then Cassandra is
On Fri, Jun 4, 2010 at 11:14 AM, Philip Stanhope pstanh...@wimba.com wrote:
I guess I'm thick ...
What would be the right choice? Our data demands have already been proven to
scale beyond what RDB can handle for our purposes. We are quite pleased with
Cassandra read/write/scale out. Just
That's entirely up to you. If you make row keys that are time ordered
and include the time as a prefix in the key, you just use get_range()
as usual, start now, end 7pm yesterday, count of 10.
On Fri, Jun 4, 2010 at 2:23 PM, Nicholas Sun nick@raytheon.com wrote:
Is there a mechanism to
There is no 'master' so all copies are replicas. RF=1 means 1 node
has the data, RF=2 means 2 do, etc.
On Mon, Jun 7, 2010 at 4:16 AM, Per Olesen p...@trifork.com wrote:
Hi,
I am unclear about what the ReplicationFactor value means.
Does RF=1 mean that there is only one single node that has
On Sun, Jun 13, 2010 at 12:53 AM, Torsten Curdt tcu...@vafer.org wrote:
rant
TBH while we are using super columns, the somehow feel wrong to me. I
would be happier if we could move what we do with super columns into
the row key space. But in our case that does not seem to be so easy.
/rant
On Sat, Jun 12, 2010 at 7:46 PM, Anty anty@gmail.com wrote:
Hi:ALL
I have 10 nodes cluster ,after inserting many records into the cluster, i
compact each node by nodetool compact.
during the compaciton process ,something wrong with one of the 10 nodes ,
when the size of the compacted
What specifically is driving you to use trunk rather than the stable,
0.6 branch?
On Sun, Jun 13, 2010 at 1:37 PM, Matthew Conway m...@backupify.com wrote:
Not so much worried about temporary breakages, but more about design
decisions that are made to enhance cassandra at the cost of a data
On Sun, Jun 13, 2010 at 3:08 PM, Mark Robson mar...@gmail.com wrote:
Range queries I think make them less useful,
Not to my knowledge.
but only work if you're using
OrderPreservingPartitioner. The OPP comes with its own caveats - your nodes
are likely to become badly unbalanced,
On Mon, Jun 14, 2010 at 6:09 AM, Per Olesen p...@trifork.com wrote:
So, in my use case, when searching on e.g. company, I can then access the
DashboardCompanyIndex with a slice on its SC and then grab all the uuids
from the columns, and after this, make a lookup in the Dashboard CF for each
My guess: you are outrunning your disk I/O. Each of those 5MB rows
gets written to the commitlog, and the memtable is flushed when it
hits the configured limit, which you've probably left at 128MB. Every
25 rows or so you are getting memtable flushed to disk. Until these
things complete, they
...or does it very greatly from installation to installation?
Yes.
changes
take effect.
-Original Message-
From: Benjamin Black [mailto:b...@b3k.us]
Sent: Monday, June 14, 2010 7:46 PM
To: user@cassandra.apache.org
Subject: Re: java.lang.OutofMemoryerror: Java heap space
My guess: you are outrunning your disk I/O. Each of those 5MB rows
gets written
You are likely exhausting your heap space (probably still at the very
small 1G default?), and maximizing the amount of resource consumption
by using CL.ALL. Why are you using ALL?
On Tue, Jun 15, 2010 at 11:58 AM, Julie julie.su...@nextcentury.com wrote:
I am running a 10 node cassandra 0.6.1
On Tue, Jun 15, 2010 at 1:40 PM, Julie julie.su...@nextcentury.com wrote:
Thanks for your reply. Yes, my heap space is 1G. My vms have only 1.7G of
memory so I hesitate to use more.
Then write slower. There is no free lunch.
b
Known bug, fixed in latest 0.6 release.
On Tue, Jun 15, 2010 at 3:29 PM, aaron aa...@thelastpickle.com wrote:
hello,
I have a 4 node cassandra cluster with 0.6.1 installed. We've been running
a mixed read / write workload test how it works in our environment, we run
about 4M bath mutations
On Tue, Jun 15, 2010 at 3:55 PM, Charles Butterfield
charles.butterfi...@nextcentury.com wrote:
Benjamin Black b at b3k.us writes:
Then write slower. There is no free lunch.
b
Are you implying that clients need to throttle their collective load on the
server to avoid causing the server
This is not the bug to which I was referring. I don't recall the
number, perhaps someone else can assist on that front? I just know I
specifically upgraded to 0.6 trunk a bit before 0.6.2 to pick up the
fix (and it worked).
b
On Tue, Jun 15, 2010 at 6:07 PM, Rob Coli rc...@digg.com wrote:
On Tue, Jun 15, 2010 at 4:44 PM, Charles Butterfield
charles.butterfi...@nextcentury.com wrote:
I guess my point is that I have rarely run across database servers that die
from either too many client connections, or too rapid client requests. They
generally stop accepting incoming connections
On Tue, Jun 15, 2010 at 4:44 PM, Charles Butterfield
charles.butterfi...@nextcentury.com wrote:
To clarify the history here -- initially we were writing with CL=0 and had
great performance but ended up killing the server. It was pointed out that
we were really asking the server to accept and
On Tue, Jun 15, 2010 at 4:58 PM, Jonathan Shook jsh...@gmail.com wrote:
If there aren't enough resources on the server side to service the
clients, the expectation should be that the servers have a graceful
performance degradation, or in the worst case throw an error specific
to resource
Yes!
On Tue, Jun 15, 2010 at 6:44 PM, Jonathan Ellis jbel...@gmail.com wrote:
I think the one you're referring to is
https://issues.apache.org/jira/browse/CASSANDRA-1076
On Tue, Jun 15, 2010 at 8:16 PM, Benjamin Black b...@b3k.us wrote:
This is not the bug to which I was referring. I don't
Columnar data stores like Cassandra require you to construct indices to
answer the queries of interest to you.
http://www.slideshare.net/benjaminblack/cassandra-basics-indexing
On Thu, Jun 17, 2010 at 12:04 AM, Anthony Ikeda
anthony.ik...@cardlink.com.au wrote:
I’m wondering if anyone can
Are these physical machines or virtuals? Did you post your
cassandra.in.sh and storage-conf.xml someplace?
On Thu, Jun 17, 2010 at 10:31 AM, AJ Slater a...@zuno.com wrote:
Total data size in the entire cluster is about twenty 12k images. With
no other load on the system. I just ask for one
you either need to use OPP and issue a get_range() request with empty
strings for start and end keys (and you'll generally want to paginate using
a count option and saving the last entry in a given page), or you need to
index your rows. same as with any other sort of query you might want to
You download the patch and apply it.
On Thu, Jun 17, 2010 at 4:10 PM, Anthony Ikeda
anthony.ik...@cardlink.com.au wrote:
Thanks Sylvia, I would like to actually do that actually. Any idea how I can
get started?
-Original Message-
From: Sylvain Lebresne [mailto:sylv...@yakaz.com]
On Thu, Jun 17, 2010 at 9:00 PM, Anthony Ikeda
anthony.ik...@cardlink.com.au wrote:
I'm certain I didn't mention Lucandra, but yes I get the idea about the
concepts:
Lucandra is Lucene on Cassandra. Unclear to me how else Lucene is
relevant, but, ok!
* Use indexing tool to reference with
Would be interesting to have a snitch that manipulated responses for
read nodes based on historical response times.
On Fri, Jun 18, 2010 at 8:21 AM, James Golick jamesgol...@gmail.com wrote:
Our cassandra client fails over if a node times out. Aside from actual
failure, repair and major
http://wiki.apache.org/cassandra/DistributedDeletes
On Thu, Jun 17, 2010 at 9:10 AM, Amir amir7...@yahoo.com wrote:
Hi All,
I'm running a benchmark on Cassandra while using a benchmark client which I've
written myself.
I'm running the following scenario:
One Cassandra node on the same
Only one: don't use it if you want performance.
On Sun, Jun 20, 2010 at 11:11 AM, Christian van der Leeden
christian.vanderlee...@googlemail.com wrote:
Hi,
I'm just experimenting and benchmarking cassandra for my use case.
I'm using the fauna/cassandra and fauna/thrift_client. Is there
No.
On Sun, Jun 20, 2010 at 2:42 PM, Rishi Bhardwaj khichri...@yahoo.com wrote:
Hi
I was wondering if Cassandra has any plans for supporting atomic compare and
swap operation on a column value? Compare could be on timestamp for the
column or the column value itself and the write of course is
If there is ambiguity, something else is wrong and you should probably
stick with a regular CF. If you are indexing a regular CF with an SCF
you are probably doing it right. If you are trying to model some
hierarchical structure from your problem domain, I really recommend
just using composite
Did you forget to run repair?
On Mon, Jun 21, 2010 at 7:02 PM, Joost Ouwerkerk jo...@openplaces.org wrote:
I believe we did nodetool removetoken on nodes that were already down (due
to hardware failure), but I will check to make sure. We're running Cassandra
0.6.2.
On Mon, Jun 21, 2010 at
Are you seeing any sort of log messages from Cassandra at all?
On Wed, Jun 23, 2010 at 2:26 PM, Sean Bridges sean.brid...@gmail.com wrote:
We were running a load test against a single 0.6.2 cassandra node. 24
hours into the test, Cassandra appeared to be nearly frozen for 10
minutes. Our
On Sun, Jun 27, 2010 at 7:36 PM, Anthony Ikeda
anthony.ik...@cardlink.com.au wrote:
Say my query is: Get all Work addresses in New York and the address
owner. Steps to get the data would be:
If this is the query you want to run, then you probably just want to put the
owner in the index
Does this happen after you have changed the ring topology, especially
adding nodes?
2010/6/30 Stephen Hamer stephen.ha...@xobni.com:
When this happens to me I have to do a full cluster restart. Even doing a
rolling restart across the cluster doesn't seem to fix them, all of the
nodes need to
ZK is way overkill for counters. memcache and redis are much better at the job.
On Tue, Jun 29, 2010 at 12:32 PM, Jonathan Shook jsh...@gmail.com wrote:
Until then, a pragmatic solution, however undesirable, would be to
only have a single logical thread/task/actor that is allowed to
.QUORUM or .ALL (they are the same with RF=2).
On Wed, Jun 30, 2010 at 10:22 PM, James Golick jamesgol...@gmail.com wrote:
4 nodes, RF=2, 1 node down.
How can I get an UnavailableException in that scenario?
- J.
Thanks, second funniest thing I've read this month!
On Tue, Jul 6, 2010 at 4:13 PM, Matt Su matt...@morningstar.com wrote:
Thanks for all your guys’ information.
This thread make us raised a concern: we choose Cassandra because
FB,Twitter,Digg are using them, and we’re doubting whether
On Thu, Jul 8, 2010 at 9:02 AM, ChingShen chingshenc...@gmail.com wrote:
Hmm.. as you mentioned that it will write a hint and report success at
CL.ANY, does the hinted handoff only work at CL.ANY?
Still no. Hints are written when nodes are down, regardless of CL,
unless HH is disabled. CL
(and I'm sure someone will correct me if I am wrong on that)
On Thu, Jul 8, 2010 at 11:24 AM, Benjamin Black b...@b3k.us wrote:
There is a memtable per CF, regardless of how many keyspaces you have.
- what areas should I investigate
to understand the concerns you raise?
Thanks again
-Original Message-
From: Benjamin Black [mailto:b...@b3k.us]
Sent: Thursday, July 08, 2010 11:28 AM
To: user@cassandra.apache.org
Subject: Re: Use of multiple Keyspaces
(and I'm sure someone
On Sat, Jul 10, 2010 at 12:22 PM, Colin Clark
co...@cloudeventprocessing.com wrote:
Although I'm a fan of Cassandra, there's no way I'd use it today for my tier
1 deployments, because I don't have the resources of Facebook, and even
though Cassandra is open source, that doesn't mean I can fix
You constructed a pathological case and then got confused at the result.
Consider instead a realistic case: RF=3, CL=QUORUM. Writes should go
to all of A, B, and C. B is down when the write request arrives, so
does not acknowledge the it. A and C acknowledge the write. Since
quorum is
And, to be clear, there is no good reason to use CL.ZERO and it can be
a serious resource hog on the coordinator.
On Sun, Jul 11, 2010 at 9:21 AM, ChingShen chingshenc...@gmail.com wrote:
Hi all,
Does it mean that the coordinator node always return success to the client
at CL.ZERO? But if
On 07/11/2010 11:09 AM, Benjamin Black wrote:
And, to be clear, there is no good reason to use CL.ZERO and it can be
a serious resource hog on the coordinator.
On Sun, Jul 11, 2010 at 9:21 AM, ChingShenchingshenc...@gmail.com
wrote:
Hi all,
Does it mean that the coordinator node always
You were just told it is packaged with what it needs. The API is not
changed from 0.6.1 to 0.6.3. Why do you think you need to generate
client code?
On Mon, Jul 12, 2010 at 2:16 PM, S Ahmed sahmed1...@gmail.com wrote:
Ok I guess I have to read up on exactly what is going on here.
I figured I
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