TSocket: Could not write 85 bytes -exception on some get_column calls

I'm having a strange problem when some of get_column and get_slice calls fails to "TSocket: Could not write 85 bytes paja.dev.pri:9160" exception. The problem appears on some but not all calls to get_column and also some times to other calls. I'm using 0.6.3 on a single host (it's a development in

Re: TSocket: Could not write 85 bytes -exception on some get_column calls

I'm having a simmular problem, but i get verry random read problems 4 bytes timouts. (mailed before about this) The only fix i got/found was, switch to framed transport instead of buffered transport, but i still have the same problem (less frequent) running debian packaged cassandra (0.6.1) with

Which node is coordinator node?

Hi all, I'm newbie in Cassandra, I have a question about which node is coordinator node in my cluster. I have A, B, C, D, E, F and G nodes. if I run a write operation on "A" node, and key range between A and B, so the A node is responsible to write the key to B, C and D nodes(RF=3) ? and does i

Re: TSocket: Could not write 85 bytes -exception on some get_column calls

Hi Pieter, I switched to framed transport but it didn't completely fix the problem. > PS. i see there is 0.6.3 now available for debian, I'll test that version.. > like you said you don't have the issue on 0.6.3 it might be fixed there.. I'm sorry if I didn't tell clearly enough: the problem sta

Re: Digg 4 Preview on TWiT

On 2010-07-05 15:40, Eric Evans wrote: > On Sun, 2010-07-04 at 13:14 +0100, Bill de hÓra wrote: >> This person's understanding is that Facebook 'no longer contributes to >> nor uses Cassandra.': >> >> http://redmonk.com/sogrady/2010/05/17/beyond-cassandra/ > > Last I heard, Facebook was still usin

Re: Digg 4 Preview on TWiT

What were the right questions? I view Facebook's move away from Cassandra as somewhat significant. And are they indeed using HBase then, and if so, what were the right answers? On 7/6/2010 5:34 AM, David Strauss wrote: On 2010-07-05 15:40, Eric Evans wrote: On Sun, 2010-07-04 at 13:14

Re: Which node is coordinator node?

Which ever node the client connects to is the coordinator node. It will take care of sending the messages to the nodes who will do the actual work. If you have multiple nodes try a DNS round robin to distribute client connections around. Aaron On 6 Jul 2010, at 22:10, ChingShen wrote: > Hi al

Re: Digg 4 Preview on TWiT

On Tue, 2010-07-06 at 05:59 -0500, Colin Clark wrote: > What were the right questions? I view Facebook's move away from > Cassandra as somewhat significant. For here, I guess it's only significant if there are interesting technical reasons. I find Cassandra's design tradeoffs close to optimal, so

Query on delete a column inside a super column

Hi All, I have a query related to deleting a column inside a super column The following is my cassandra schema [cache_pages_key_hash] => Array ( [hash_1] => Array ( [1] => 4c330e95195f9 [2] => 4c330e951f18b

Re: Digg 4 Preview on TWiT

FB Inbox Search still runs on Cassandra and will continue to do so. I should know since I maintain it :). Cheers Avinash On Tue, Jul 6, 2010 at 3:34 AM, David Strauss wrote: > On 2010-07-05 15:40, Eric Evans wrote: > > On Sun, 2010-07-04 at 13:14 +0100, Bill de hÓra wrote: > >> This person's und

Key cache size seems to be double what I would expect

I am running a 10 node Cassandra cluster (with a replication factor of 3) and am doing some key cache testing. I populate the database with keys numbered '1' through '1,000,000', set the key cache and row cache capacity to 100, then attempt to read the key '500' multiple times. The key cache s

Creating key spaces on the fly

Hi everyone, I'm trying to use Cassandra to replace a RDBMS. My application handles domains. And, for every domain it creates a new DB with a pre-defined set of tables. After reading the documentation, I assume that this should be handled on Cassandra by creating new key spaces. Could I know if

Re: Creating key spaces on the fly

it is possible on trunk now I believe.. jesse -- jesse mcconnell jesse.mcconn...@gmail.com On Tue, Jul 6, 2010 at 10:13, Tharindu Mathew wrote: > Hi everyone, > > I'm trying to use Cassandra to replace a RDBMS. > > My application handles domains. And, for every domain it creates a new DB > wi

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0.7, 0.8 roadmaps

Is there a document anywhere with estimated release dates for the 0.7 and 0.8 versions of cassandra? I've seen https://issues.apache.org/jira/browse/CASSANDRA/fixforversion/12314533, which indicates progress towards 0.7, but I haven't had much luck with finding date estimates. I'm especially inte

RE: 0.7, 0.8 roadmaps

Along this line, is it known if upgrading from 0.6 to 0.7 will require cluster downtime? -Original Message- From: tsuraan [tsur...@gmail.com] Received: 7/6/10 9:16 AM To: user@cassandra.apache.org [u...@cassandra.apache.org] Subject: 0.7, 0.8 roadmaps Is there a document anywhere with

Re: Query on delete a column inside a super column

insert is insert-or-update. leaving out a column from an update doesn't delete it, you need to use the remove method for that. On Tue, Jul 6, 2010 at 7:41 AM, Moses Dinakaran wrote: > Hi All, > > I have a query related to deleting a column inside a super column > > The following is my cassandra

Re: Digg 4 Preview on TWiT

This is a ridiculous statement by some newbie I guess , We today have a 150 node Cassandra cluster running Inbox search supporting close to 500M users and over 150TB of data growing rapidly everyday. I am on pager for this monster :) so its pretty funny to hear this statement. - Prashant On Tue

Re: Digg 4 Preview on TWiT

Thanks Avinash It's sad to see engineers ready to switch from one solution to another, simply because they hear rumors about Facebook or some other large website moving away from it. The part the really bothers me is how people were ready to look for an alternative solution before they even verifi

REMOVE

Please remove me from the list. Thank you. Warm Regards, Stephanie From: Richard L. Burton III [mailto:mrbur...@gmail.com] Sent: Tuesday, July 06, 2010 12:17 PM To: user@cassandra.apache.org Subject: Re: Digg 4 Preview on TWiT Thanks Avinash It's sad to see engineers ready to switch from one so

Re: Digg 4 Preview on TWiT

Nonetheless, thanks for clearing that one up. And that's some serious volume you've got there :) Bill On Tue, 2010-07-06 at 12:01 -0700, Prashant Malik wrote: > This is a ridiculous statement by some newbie I guess , We today have > a 150 node Cassandra cluster running Inbox search supporting clo

Re: Creating key spaces on the fly

Rather than creating a new keyspace consider using the domain as part of a key. Generally an application has a single keyspace and a few column families (enough to response to the queries you expect). Think about using the domain as the full or partial key, and then creating column families fo

REMOVE

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Re: REMOVE

On Tue, Jul 6, 2010 at 3:41 PM, Stephanie Mardell wrote: > I tried to remove myself, but it doesn't seem to be working...please advise... > Send your message here: user-unsubscr...@cassandra.apache.org

Re: Digg 4 Preview on TWiT

I have gone through the appropriate channel here at FB to make sure that the correct information is presented. the article has now been updated to " (*Update*: just for reference, we’re told via email that Facebook, “no longer contributes to nor uses Cassandra.” *Update 2*: we are now being to

RE: Digg 4 Preview on TWiT

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 Cassandra is definitely trustable. The question is what action will we take, if after a few time, these big tech company really st

Re: Digg 4 Preview on TWiT

Then I'll tell my friend at Facebook to stick to topics he's qualified to speak about. :-) On 2010-07-06 13:21, Avinash Lakshman wrote: > FB Inbox Search still runs on Cassandra and will continue to do so. I > should know since I maintain it :). > > Cheers > Avinash > > On Tue, Jul 6, 2010 at 3

Re: Digg 4 Preview on TWiT

On Jul 6, 2010, at 6:18 PM, David Strauss wrote: > Then I'll tell my friend at Facebook to stick to topics he's qualified > to speak about. :-) You might want to clarify that this advice applies to all topics of discussion and not just Facebook related ones. ;) --Joe

Some questions about the write operation and hinted handoff

Hi all, I have A, B, C, D, E, F and G nodes(RF=3), if I run a write operation(CL=ALL) on "A" node(coordinator), and the key range between A and B, therefore, the data will be stored on B, C and D nodes, right? Second, if B node is down during the write operation, does it return failure(CL=ALL) t

EC2 small instance config?

Anyone using Amazon EC2 small instances for a production cluster under reasonably high loads (perhaps hundreds or low thousands ops/sec)? I'm looking for an example storage-conf.xml file to use as a guide. If you've done one and would be willing to share, please let me know. I'm willing to bet a

Re: Which node is coordinator node?

Thanks aaron morton, I have an another question about replication. if I run a write operation on A node and how does the replication work? A node dispatches three request to B, C and D nodes respectively to do write operation? or A node dispatches a request to B node, then B node forwards it t

Re: EC2 small instance config?

Have you done some testing with small nodes already? Because from what we saw trying to run IO bound services on small instances is, that their IO performance is really bad compared to other instance types as you can read in several blogs. Would be interesting to hear, if a Cassandra cluster ca

Re: Creating key spaces on the fly

Thanks Jess and Aaron for the replies. I will take a checkout and try again.

TNonblockingServer threadpool in cassandra?

Hi, Cassandra does not adopt TNonblockingServer threadpool model, which i think it's better to handle very many client connections . With TThreadPoolServer threadpool , I find GC storm and OOM, when client connections are increasing sharply . yes, TNonblockingServer is already in thrift-0.2.0.

Re: Query on delete a column inside a super column

Hi, Thanks for the reply, The remove method $cassandraInstance->remove('cache_pages_key_hash', 'hash_1' ) which will remove the whole key, But I don't want to do that, I need to remove one column inside that key Can you please tell me how to use the remove method in this case. Regards, Moses.