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Schema changes not getting picked up from different process By: Victor Blaga Hi all, This is my first message on this posting list so I'm sorry
if I am breaking any rules. I just wanted to report some sort of a
problem that I'm having with Cassandra. Short version of my problem:
if I make changes to the schema from within…
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1 | May 25 2012 06:33 |
May 25 2012 06:46 |
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Schema size By: Sasha Yanushkevich Hi All, I have a question about schema cleaning in cassandra. I
use cassandra version 1.0.9. I have 5 keyspaces and about 1500 column
family per keyspace. After dynamically creating and deleting CF my
schema's sstables size were very high. For…
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0 | May 25 2012 05:26 |
May 25 2012 05:26 |
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High CPU load on Cassandra Node By: Shubham Srivastava I have a multiDC ring with 6 nodes in each DC. I have a single node
which runs some jobs (including Hadoop Map-Reduce with PIG) every
15minutes. Lately there has been high CPU load and memory issues on
this node. What I could see from Ganglia is…
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0 | May 24 2012 23:52 |
May 24 2012 23:52 |
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Help deleting data using cql v3 By: Stephen Powis I have the following schema setup in cassandra 1.1 with cql 3:
CREATE TABLE testCol ( my_id varchar, time_id TimeUUIDType,
my_value int, PRIMARY KEY (my_id, time_id) ); and the following
data already inserted: my_id | time_id …
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2 | May 24 2012 20:25 |
May 24 2012 23:43 |
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about multitenant datamodel By: Toru Inoko Hi, all. I'm designing data api service(like cassandra.io but not
using dedicated server for each user) on cassandra 1.1 on which
users can do DML/DDL method like cql. Followings are api which users
can use( almost same to cassandra api). -…
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0 | May 24 2012 20:03 |
May 24 2012 20:03 |
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unknown exception with hector By: Deno Vichas could somebody clue me in to the cause of this exception? i see
these randomly. AnalyzerService-2 2012-05-22 13:28:00,385 :: WARN
cassandra.connection.HConnectionManager - Exception:…
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4 | May 22 2012 12:35 |
May 24 2012 20:00 |
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Counters and replication factor By: Alain RODRIGUEZ Hi, I trying to switch from a RF = 1 to a RF = 3, but I get wrong
values from counters when doing so... I got a CF that contains many
counters of some events. When I'm at RF = 1 and simulate 10 events,
they are well counted. However, when I…
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12 | Nov 7 2011 09:16 |
May 24 2012 19:42 |
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Re: Migrating from a windows cluster to a linux cluster. By: Brandon Williams On Thu, May 24, 2012 at 1:50 PM, Henrik Schröder <skro###
@gmail.com> wrote: > Ok. It's important for us to not have any
downtime, so how about this > solution: > > We startup the
Linux cluster independently. > We configure our…
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4 | May 24 2012 14:29 |
May 24 2012 17:57 |
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Why does a large compaction on one node affect the entire cluster? By: Thomas van Neerijnen Hi all I am running Cassandra 1.0.10 installed from the apache debs
on ubuntu 11.10 on a 7 node cluster. I moved some tokens around my
cluster and now have one node compacting a large Leveled compaction
column family. It has done about 5k out of…
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0 | May 24 2012 13:24 |
May 24 2012 13:24 |
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Composite keys question By: Roland Mechler Suppose I have a table in CQL3 with a 2 part composite, and I do a
select that specifies just the second part of the key (not the
partition key), will this result in a full table scan, or is the
second part of the key indexed? Example: …
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0 | May 24 2012 12:55 |
May 24 2012 12:55 |
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inconsistent snapshots By: Jose Flexa Hi all, Having issues with cassandra 1.0.8 on AWS EC2 and Netflix
Priam with a XFS FS: seems snapshots are broken. When I restore then
and run nodetool repair cassandra cant load them complaning . Anybody
had a similiar experience or any…
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1 | May 24 2012 05:59 |
May 24 2012 12:30 |
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Query on how to count the total number of rowkeys and columns in them By: Prakrati Agrawal Hi I am trying to learn Cassandra and I have one doubt. I am using
the Thrift API, to count the number of row keys I am using KeyRange to
specify the row keys. To count all of them, I specify the start and
end as "new byte[0]". But the count is…
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2 | May 24 2012 01:24 |
May 24 2012 08:57 |
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Replication factor By: Daning Wang Hello, What is the pros and cons to choose different number of
replication factor in term of performance? if space is not a concern.
for example, if I have 4 nodes cluster in one data center, how can
RF=2 vs RF=4 affect read performance? If…
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9 | May 22 2012 16:34 |
May 24 2012 08:47 |
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Re: Retrieving old data version for a given row By: zhangcheng2 This is a multi-part message in MIME format. After compaciton, the
old version data will gone! zhangcheng2 From: Felipe
Schmidt Date: 2012-05-14 05:33 To: user Subject: Retrieving old
data version for a given row I'm trying to…
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6 | May 13 2012 21:36 |
May 24 2012 05:26 |
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Error loading data: Internal error processing get_range_slices / Unavailable Exception By: Abhijit Chanda Hi All, i am facing problem while setting up my database. The error
under mentioned is reflected every time i try to setup the DB. Unable
to understand why these are occurring? though previously it was
working fine, i guess it is some connection…
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1 | May 23 2012 23:16 |
May 24 2012 04:45 |
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Confusion regarding the terms "replica" and "replication factor" By: java jalwa Hi all, I am a bit confused regarding the terms
"replica" and "replication factor". Assume that I am using
RandomPartitioner and NetworkTopologyStrategy for replica placement.
From what I understand, with a RandomPartitioner, a row…
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3 | May 22 2012 22:16 |
May 24 2012 04:40 |
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Data Versioning Support By: Felipe Schmidt Doe's Cassandra support data versioning? I'm trying to find it in
many places but I'm not quite sure about it. Regards, Felipe Mathias
Schmidt (Computer Science UFRGS, RS, Brazil)
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1 | May 24 2012 04:15 |
May 24 2012 04:30 |
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how to get list of snapshots By: ???? ??????? Hello! I'm about to schedule backups in the following way a)
snapshots are done daily b) increment backups are enabled so, backup
will be consistent, very old snapshots must be removed (I guess, a
week depth should be enough). couple of…
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3 | May 23 2012 00:07 |
May 24 2012 04:27 |
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Re: Tuning cassandra (compactions overall) By: aaron morton > 1 - I got this kind of message quite often (let's say every 30
seconds) : You are running out of memory. Depending on the size of
your schema and the work load you will want to start with 4 or 8 GB
machines. But most people get the best…
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7 | May 16 2012 04:45 |
May 24 2012 03:23 |
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Correct way to set strategy options in cqlsh? By: Damick, Jeffrey What's the correct way to set the strategy options for the
networktopologystrategy with cqlsh? I've tried several variations,
but what's expected way to escape the hyphen in "us-east" ? Thanks,
-jeff CREATE KEYSPACE something ... WITH…
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8 | May 22 2012 10:11 |
May 23 2012 14:26 |