Anyone?
-
Hi,
I was reading http://wiki.apache.org/cassandra/FAQ#iter_world and decided to
implement the get_range_slices method for listing all keys of a CF. Only thing
is, it doesn't work that well for me :-)
I do as it says (I think), and take KeyRanges of size N and use the key
we were one of the vbulletin customers and our forums has been facing some
bad scaling issues.
we coded our forum software to work with cassandra. we are still testing for
bugs and might go live in couple of weeks. You can ask any specific
questions about vbulletin and cassandra and i will answer
Hi,
My problem is that I cannot locate Java equivalents to the api calls you
present in the ruby files you have presented. They are not visible in the
java client packages I have (My code is not that old of trunk).
I located the code below from some of the unit test code files This code
will
This is a bug. Can you submit a ticket with test data to reproduce?
On Fri, Jul 9, 2010 at 6:40 AM, Per Olesen p...@trifork.com wrote:
Hi,
I was reading http://wiki.apache.org/cassandra/FAQ#iter_world and decided to
implement the get_range_slices method for listing all keys of a CF. Only
This is a bug. Can you submit a ticket with test data to reproduce?
Uuuh, maybe...:)
Right now it is happening on some life user data, that I am not sure I can
ship. Haven't tried if I can reproduce locally.
One question: We are running 0.6.2. Could this be fixed in 0.6.3? Not that big
a
Very interesting!
What kind of integration do you have between vB and Cassandra? its not a
port then?
On Mon, Jul 12, 2010 at 3:34 AM, Sandeep Kalidindi at PaGaLGuY.com
sandeep.kalidi...@pagalguy.com wrote:
we were one of the vbulletin customers and our forums has been facing some
bad
But in Cassandra output log :
r...@cassandra-2:~# tail -f /var/log/cassandra/output.log
INFO 15:32:05,390 GC for ConcurrentMarkSweep: 1359 ms, 4295787600
reclaimed leaving 1684169392 used; max is 6563430400
INFO 15:32:09,875 GC for ConcurrentMarkSweep: 1363 ms, 4296991416
reclaimed
On Sun, 2010-07-11 at 01:06 +0530, Sumit Datta wrote:
What I do not see are details as to why Cassandra is not being used to
store tweets. Or the details of the implementation that does have
Cassandra.
I wouldn't let that stop you. You should consider doing what so many
others are: treat all
The Thrift server is embedded in Cassandra, and starts by default. Look for
references to Thrift on: http://wiki.apache.org/cassandra/GettingStarted
Thanks,
Stu
-Original Message-
From: S Ahmed sahmed1...@gmail.com
Sent: Monday, July 12, 2010 3:43pm
To: user@cassandra.apache.org
confused, why does the installation guide say to build and make it then?
http://github.com/ericflo/twissandra
http://github.com/ericflo/twissandratwissandar is for 0.6.1 is that why?
i.e. it was embedded in a later version?
On Mon, Jul 12, 2010 at 4:46 PM, Stu Hood stu.h...@rackspace.com wrote:
You'll need Thrift installed to generate the _client_ code: the server code is
embedded within Cassandra.
-Original Message-
From: S Ahmed sahmed1...@gmail.com
Sent: Monday, July 12, 2010 3:49pm
To: user@cassandra.apache.org
Subject: Re: server needs thrift to run also?
confused, why
Twissandra is packaged with pycassa + correct generated thrift
transports under /deps already, so really just need the thrift binary
to build from a cassandra.thrift API newer than what's currently
supported by the bundled pycassa.
-michael
On Mon, Jul 12, 2010 at 1:55 PM, Stu Hood
Ok I guess I have to read up on exactly what is going on here.
I figured I could download twissandra, fire up cassandra and run the app!
I thought all you needed was the python driver which comes with twissandra.
Let me read more about Thrift and generating client code etc.
thanks!
On Mon,
What sort of traffic levels made you port the application to Cassandra?
Very interested in seeing this go live.
What sort of server setup are you looking at using?
On Mon, Jul 12, 2010 at 4:39 PM, Sandeep Kalidindi at PaGaLGuY.com
sandeep.kalidi...@pagalguy.com wrote:
No we re-coded from
well we were going down constantly with VB running on 3-4 dedicated servers
due to huge traffic(couple of tens of millions of page views). We are also
planning on some new major features, hence the shift to cassandra with
future in mind.
Well roughly the architecture is like this(in order of how
The Tomstones are removed after GCGraceSeconds (in the
storage-config.xml), at the next Major Compaction
http://wiki.apache.org/cassandra/MemtableSSTable?highlight=%28tombstones%29Take
a look at http://wiki.apache.org/cassandra/DistributedDeletes and
Handling Failure on
My understanding is that the coordinator will acknowledge the writes faster then they can actually be written. Eventually it will run out of buffer space. see http://wiki.apache.org/cassandra/FAQ#slows_down_after_lotso_insertsUsing CL.ONE makes it harder for the clients to flood the cluster with
I can't picture how you could be reading data that sorts *before* the
start key with a range slice. So, probably not fixed in 0.6.3.
On Mon, Jul 12, 2010 at 7:56 AM, Per Olesen p...@trifork.com wrote:
This is a bug. Can you submit a ticket with test data to reproduce?
Uuuh, maybe...:)
CL.ONE represents the fastest you can sustain. CL.ZERO represents
writing to memory on the coordinator, regardless of what the nodes can
sustain for durable writes. That is a bad situation, regardless of
your durability goals. So, there is no good reason.
What you are describing is a
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
I'll take a guess.
S Ahmed, the Thrift compiler takes a .thrift file and can generate client
and server code for it in your language of choice. This code depends on the
Thrift runtime library in that language.
For instance, the Thrift Java runtime library is bundled with Cassandra as a
jar.
Why Cassandra *and* Redis? What do you perceive as the strengths or
weaknesses of the two?
On Mon, Jul 12, 2010 at 2:40 PM, Sandeep Kalidindi at PaGaLGuY.com
sandeep.kalidi...@pagalguy.com wrote:
well we were going down constantly with VB running on 3-4 dedicated servers
due to huge
the goal i am reaching for with ZERO is to return control to the user ASAP,
with super fast response times. the load isn't high at all, but persisting
does take time even under light load. we are not actually using ZERO at the
moment but were considering it for fire and forget type of events.
I have two CFs in my keyspace. one i care about allowing a good amount of time
for tombstones to propagate (GCGraceSeconds large) ... but the other i couldn't
care and in fact i want them gone ASAP so i don't iterate over them. has any
thought been given to making this setting per Keyspace or
GCGS per CF sounds totally reasonable to me.
On Mon, Jul 12, 2010 at 6:33 PM, Todd Burruss bburr...@real.com wrote:
I have two CFs in my keyspace. one i care about allowing a good amount of
time for tombstones to propagate (GCGraceSeconds large) ... but the other i
couldn't care and in fact
On Sat, Jul 10, 2010 at 2:22 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 it
On Mon, 2010-07-12 at 17:16 -0400, S Ahmed wrote:
Ok I guess I have to read up on exactly what is going on here.
I figured I could download twissandra, fire up cassandra and run the
app!
Pretty much, but you do need to install the Thrift python module (which
the README does say).
Try:
Is it possible to get this feature in 0.7?
-Original Message-
From: Jonathan Ellis [jbel...@gmail.com]
Received: 7/12/10 5:06 PM
To: user@cassandra.apache.org [u...@cassandra.apache.org]
Subject: Re: GCGraceSeconds per ColumnFamily/Keyspace
GCGS per CF sounds totally reasonable to me.
if you're not sure where your bottleneck is, you aren't hitting it
hard enough :)
On Mon, Jul 12, 2010 at 9:00 PM, Lee Parker l...@socialagency.com wrote:
Has anyone experimented with different settings for concurrent reads? I
have set our servers to 4 ( 2 per processor core ). I have noticed
would it be hard to make easy_install pycassa install thrift automagically?
On Mon, Jul 12, 2010 at 10:36 PM, Eric Evans eev...@rackspace.com wrote:
On Mon, 2010-07-12 at 17:16 -0400, S Ahmed wrote:
Ok I guess I have to read up on exactly what is going on here.
I figured I could download
Probably. Can you open a ticket?
On Mon, Jul 12, 2010 at 10:41 PM, Todd Burruss bburr...@real.com wrote:
Is it possible to get this feature in 0.7?
-Original Message-
From: Jonathan Ellis [jbel...@gmail.com]
Received: 7/12/10 5:06 PM
To: user@cassandra.apache.org
On Mon, 2010-07-12 at 23:13 -0500, Jonathan Ellis wrote:
would it be hard to make easy_install pycassa install thrift
automagically?
I think it would do that already, assuming that pycassa itself was
installable from the cheeseshop (not sure why it isn't). Twissandra is
actually using an
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