I upgraded to 0.7.2 from 0.7.0 which was upgraded from 0.6.8 and I gets the
following Exception.
I have 4 nodes cluster on 2 data centers (2 nodes on each). I see the error
only on 2 nodes on the same data center.
I didn't see this error on 0.7.0
ERROR [HintedHandoff:5] 2011-02-21 03:53:22,341
On 21/02/2011 09:01, shimi wrote:
I upgraded to 0.7.2 from 0.7.0 which was upgraded from 0.6.8 and I
gets the following Exception.
I have 4 nodes cluster on 2 data centers (2 nodes on each). I see the
error only on 2 nodes on the same data center.
I didn't see this error on 0.7.0
ERROR
Hi,
The Mojo team is pleased to announce the release of Mojo's Cassandra
Maven Plugin version 0.7.2-1.
Mojo's Cassandra Plugin is used when you want to install and control a
test instance of Apache Cassandra from within your Apache Maven build.
The plugin has the following goals.
*
I launch clean cassandra 7.2 instalation, and after few days i look at
system.log follow error (more then 10 time):
ERROR [CompactionExecutor:1] 2011-02-19 02:56:17,965
AbstractCassandraDaemon.java (line 114) Fatal exception in thread
Thread[CompactionExecutor:1,1,main]
Thanks! I totally overlooked that.
El lun, 21-02-2011 a las 08:14 +1300, Aaron Morton escribió:
The best examples I know of are in the internal cli help, and
conf/casandra.yaml
Aaron
On 19/02/2011, at 12:51 AM, Héctor Izquierdo Seliva izquie...@strands.com
wrote:
Hi!
Can some
From th F:/ I assume you are on Windows ? What version?Just did a quick test on Ubuntu 10.0.4 and it works, but the File.renameTo() function used has differentbehaviordepending on the host OS. There may be some issues on
The problem on windows is that it is a bit more worried about rename
a file if the handle is still open..
So maybe some stream not closed on the file.
Bye,
Norman
2011/2/21 Aaron Morton aa...@thelastpickle.com:
From th F:/ I assume you are on Windows ? What version?
Just did a quick test on
The code creates a new .tmp file in the saved_caches directory and then renames it to a non .tmp file name, so there is nothing else with a handle open. The rename is to an existing file though.Ruslan can you please raise a bug against 0.7.2 for this and include the platform.ThanksAaronOn 22 Feb,
2011/2/21 Aaron Morton aa...@thelastpickle.com
The code creates a new .tmp file in the saved_caches directory and then
renames it to a non .tmp file name, so there is nothing else with a handle
open. The rename is to an existing file though.
Ruslan can you please raise a bug against 0.7.2
Yeshttps://issues.apache.org/jira/browse/CASSANDRAThanksAaronOn 22 Feb, 2011,at 12:55 AM, ruslan usifov ruslan.usi...@gmail.com wrote:2011/2/21 Aaron Morton aa...@thelastpickle.com
The code creates a new .tmp file in the saved_caches directory and then renames it to a non .tmp file name, so there
I did some very rough measurements in a desperate attempt to see if I
can find the issue (if there is an issue).
Since I dont know the code base well enough i chose
BufferedRandomAccessFile as my suspect, since it was rewritten from
0.7.0 to 0.7.1
I did rough measurements on how many times
I have a question. How do you think this happens only on windows(on this
platform i don't worry, because this is only test platform) or everywhere
(linux)? And how dangerous this error, or at first time i may simply ignore
it?
2011/2/21 Aaron Morton aa...@thelastpickle.com
Yes
There is no antivirus program or similar running on that machine I
guess?
That could definitely lock the file if Cassandra is creating the .tmp
file and then fairly shortly after tries to rename it.
/Daniel
On Mon, 2011-02-21 at 11:34 +, Aaron Morton wrote:
The code creates a new .tmp file
2011/2/21 Daniel Josefsson daniel.josefs...@shazamteam.com
There is no antivirus program or similar running on that machine I guess?
That could definitely lock the file if Cassandra is creating the .tmp file
and then fairly shortly after tries to rename it.
No i haven't any antivirus
Cassandra is both distributed and replicated. We have Replication Factor but
no Distribution Factor!
Distribution Factor would define over how many nodes a CF should be
distributed.
Say you want to support millions of multi-tenant users in clusters with
thousands of nodes, where you don't know
The work around is to disable saving caches, as they may not be correctly saved. However you do not have access to change the settings for the system CFs. I imagine it may only be an issue if a node is rebooted as it may load stale caches.I think it's windows only as the function used to rename
Any advices? Maybe I should group events from application? Wouldn't it be to
much overhead?
2011/2/19 Rauan Maemirov ra...@maemirov.com
Hi, with the help of twissandra example, I tried to create a scheme for
activity feed.
Activities cf stores all activities:
Activities: {
No sure whats your problem..
Use two EQ operations works without a problem here (even via the cli).
Bye,
Norman
2011/2/18 Rauan Maemirov ra...@maemirov.com:
With this schema:
create column family Userstream with comparator=UTF8Type and rows_cached =
1 and keys_cached = 10
and
Hi all.
Is there a way (besides changing the code) to replicate data from a Data
center 1 to a Data center 2, but not the other way around? I need to
have a preproduction environment with production data, and ideally with
only a fraction of the data (for example, by key preffixes). I have
poked
Hi Everyone.
I'm testing performance differences of millions of columns in a row vs
millions of rows. So far it seems wide rows perform better in terms of
reads, but there can be potentially hundreds of millions of columns in a
row. Is this going to be a problem? Should I go with individual rows?
Yes,
It has such a Clause. I am very certain that this is Not my Code because the
very Same program Works against a Cluster of the Index is created with the cli
and it does not, when the Index is configured with cassandra.yaml
My assumption is, that the Index Kreation with configured file is
Some more digging. This is the code path causing the excessive
rebuffer() calls.
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Unknown Source)
at
org.apache.cassandra.io.util.BufferedRandomAccessFile.reBuffer(BufferedRandomAccessFile.java:204)
at
David Strauss-2 wrote:
On Fri, 2011-02-18 at 12:01 -0600, Anthony John wrote:
Writes will go thru w/hinted handoff, read will fail
That is not correct. Hinted handoffs do not count toward reaching QUORUM
counts.[1]
[1] http://wiki.apache.org/cassandra/HintedHandoff
--
David
I'm afraid I didn't think too hard about your overall problem, since
since you haven't gotten other responses I can at least say something:
Theory 1: use EHCache or something like it.
Theory 2: having it in memory in the Cassandra server is nearly as
good as having it in memory in my jvm,
AFAIK the MemtablePostFlusher is the TP writing sstables, if it has a queue
then there is the potential for writes to block while it waits for Memtables
to be flushed. Take a look at your Memtable settings per CF, could it be that
all the Memtables are flushing at once? There is info in the
It's been about a month since 0.6.11, and there have been a handful of
changes since, so I'm pleased to announce the release of 0.6.12.
Source and binary archives are available from the Downloads page[3], and
packages for Debian-based systems are available from the project
repository[4].
BRAF.seek has not changed since 0.7.0. Here is the implementation:
public void seek(long newPosition) throws IOException
{
current = newPosition;
if (newPosition = bufferEnd || newPosition bufferOffset)
{
reBuffer(); // this will set bufferEnd for us
For those playing along at homeBegin forwarded message:From: ruslan usifov ruslan.usi...@gmail.comDate: 22 February 2011 2:43:52 AMTo: aa...@thelastpickle.comSubject: java.io.IOException in CompactionExecutorLet me when you have created the bug. I create
That is strange. In 0.7.0 i see this for seek:
public void seek(long pos) throws IOException
{
this.curr_ = pos;
}
Ivan
On 21.2.2011 г. 21:20 ч., Jonathan Ellis wrote:
BRAF.seek has not changed since 0.7.0. Here is the implementation:
public void seek(long newPosition) throws
Take a look at the NetworkTopologyStrategy and/or the RackInferringSnitch
together they decide where to place replicas. It's probably not a great idea
to muck around with this stuff though.
How about a hadoop job to pull out the data you want? It would be a full scan
but in parallel.
Aaron
My preference is to go with more rows as it distributes load better. But the
best design is the one that supports your read patterns.
See http://wiki.apache.org/cassandra/LargeDataSetConsiderations for background.
Aaron
On 22/02/2011, at 3:56 AM, Héctor Izquierdo Seliva izquie...@strands.com
Sounds a bit like this idea
http://www.mail-archive.com/dev@cassandra.apache.org/msg01799.html
Aaron
On 22/02/2011, at 1:28 AM, David Boxenhorn da...@lookin2.com wrote:
Cassandra is both distributed and replicated. We have Replication Factor but
no Distribution Factor!
Distribution
2011/2/21 Ivan Georgiev yngw...@bk.ru
That is strange. In 0.7.0 i see this for seek:
public void seek(long pos) throws IOException
{
this.curr_ = pos;
}
You doesn't see 0.7.0 version, you see version before
cassandra/branches/cassandra-0.7@1052531 (2010-12-24 16:57:07 + (8 weeks
ago))
And it's not like it didn't have to rebuffer then, just that the code
organization was different.
On Mon, Feb 21, 2011 at 2:12 PM, ruslan usifov ruslan.usi...@gmail.com wrote:
2011/2/21 Ivan Georgiev yngw...@bk.ru
That is strange. In 0.7.0 i see this for seek:
public void seek(long pos)
I meant what was tagged as 0.7.0, at least that is what i used in my
0.7.0 tests:
http://svn.apache.org/repos/asf/cassandra/tags/cassandra-0.7.0/
Ivan
On 21.2.2011 ?. 22:12 ?., ruslan usifov wrote:
2011/2/21 Ivan Georgiev yngw...@bk.ru mailto:yngw...@bk.ru
That is strange. In 0.7.0 i
If you look in that code, the bounds are checked on each write and
reBuffer is called from there instead of from seek
On Mon, Feb 21, 2011 at 2:21 PM, Ivan Georgiev yngw...@bk.ru wrote:
I meant what was tagged as 0.7.0, at least that is what i used in my 0.7.0
tests:
I read the logic of why writes are not allowed. But other alternative is to
allow write and just fail the reads until it's in sync again. Is there some
other problem with this logic?
The problem lies in until it's in sync again. A given node cannot
easily know for a given read, whether
Hi,
I had some spare time this weekend so I updated libcassandra to work
with the latest stable release of cassandra (0.7.2). Creating/dropping
column familes and keyspaces is now supported through libcassandra.
I updated the API a fair bit based on the new changes in 0.7.
-Padraig
On Wed, Dec
Sorry Dan, I just noticed I answer you and not to the group!Didn't want to
bother, just mistake.
Best Regards
Carlo
Messaggio originale
Da: d...@reactive.org
Data: 21/02/2011 4.23
A: user@cassandra.apache.org, cbert...@libero.itcbert...@libero.it
Ogg: Re: Are row-keys sorted by the
As Jonathan mentions the compareWith on a column family def. is defines the
order for the columns *within* a row... In order to control the ordering of
rows you'll need to use the OrderPreservingPartitioner
(http://www.datastax.com/docs/0.7/operations/clustering#tokens-partitioners-ring).
Hi,
Since its not posible to get accurate row range list because of
ghost rows atm. What is the best solution to get accurate list without ghosts.
What I am doing is listing objects that has more data in detail.
Regards,
Ásgeir Halldórsson
Since its not posible to get accurate row range list because of ghost rows
atm. What is the best solution to get accurate list without ghosts.
Page through all of the rows normally, but skip rows which have zero
columns.
--
Tyler Hobbs
Software Engineer, DataStax http://datastax.com/
No, that's not what I mean at all.
That message is about the ability to use different partitioners for
different CFs, say, RandomPartitioner for one, OPP for another.
I'm talking about defining how many nodes a CF should be distributed over,
which would be useful if you have a lot of nodes and a
On Feb 21, 2011, at 4:33 PM, Ásgeir Halldórsson wrote:
Thanks for the fast response but that would be quite difficult on paging
results, do you know if there is a fix in the works?
I don't think the range ghosts behavior is going away. Is it possible to
buffer results and return them once
Thanks for the fast response but that would be quite difficult on paging
results, do you know if there is a fix in the works?
Regards,
Ásgeir
From: Tyler Hobbs [mailto:ty...@datastax.com]
Sent: 21. febrúar 2011 23:20
To: user@cassandra.apache.org
Subject: Re: Rows and deletion
I am still getting the following:
On node 1:
ERROR 16:57:31,365 Fatal error: Bootstraping to existing token 0 is not
allowed (decommission/removetoken the old node first).
On node 2:
ERROR 16:57:42,300 Fatal error: Bootstraping to existing token
56713727820156410577229101238628035242 is not
does anybody
--
从我的移动设备发送
Is there anybody doing this ?
--
从我的移动设备发送
mcasandra wrote:
I am still getting the following:
On node 1:
ERROR 16:57:31,365 Fatal error: Bootstraping to existing token 0 is not
allowed (decommission/removetoken the old node first).
On node 2:
ERROR 16:57:42,300 Fatal error: Bootstraping to existing token
Hi Tyler,
Your script doesn't cause the problem. But the problem really occurs
in a situation.
My colleague analyzed the problem and find out how to reproduce the problem.
Please look at the jira. https://issues.apache.org/jira/browse/CASSANDRA-2212
Best regards,
Shotaro
On Fri, Feb 18, 2011
Yes.
2011/2/21 Xiaobo Gu guxiaobo1...@gmail.com:
Is there anybody doing this ?
--
从我的移动设备发送
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, the source for professional Cassandra support
http://www.datastax.com
Thanks, Padraig!
On Mon, Feb 21, 2011 at 3:30 PM, Padraig O'Sullivan
osullivan.padr...@gmail.com wrote:
Hi,
I had some spare time this weekend so I updated libcassandra to work
with the latest stable release of cassandra (0.7.2). Creating/dropping
column familes and keyspaces is now
I checked out #2212 and was able to reproduce the problem.
Thanks for investigating this and putting together a good script to
reproduce!
- Tyler
El mar, 22-02-2011 a las 08:46 +1300, Aaron Morton escribió:
Take a look at the NetworkTopologyStrategy and/or the RackInferringSnitch
together they decide where to place replicas. It's probably not a great idea
to muck around with this stuff though.
How about a hadoop job to pull out the
El mar, 22-02-2011 a las 08:49 +1300, Aaron Morton escribió:
My preference is to go with more rows as it distributes load better. But the
best design is the one that supports your read patterns.
See http://wiki.apache.org/cassandra/LargeDataSetConsiderations for
background.
Aaron
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