On Mon, Apr 16, 2012 at 10:45 PM, Bryce Godfrey
bryce.godf...@azaleos.com wrote:
I keep running into this with my testing (on a windows box), Is this just a
OOM for RAM?
How much RAM do you have? Do you use completely standard settings? Do
you also OOM if you try the same test with Cassandra
Secondary indexes require a read and a write (potentially two) for every
update. Regular mutations are no look writes and are much faster.
Just like in a RDBMS, it's more efficient to insert data and then create the
index than to insert data with the index present.
An alternative is to
Hand rolled headers and binary serialisation over TCP.
See o.a.c.net.IncomingTcpConnection for the starting point for an incoming
connection.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 17/04/2012, at 9:49 AM, Tom Duffield (Mailing
What version are you on ?
it's on odd error for sure. Try eliminates changes until you get to a stable
base: use the default install out of the box and the tools/stress app in the
source distro. If that works try it with your C++ client.
Hope that helps.
-
Aaron Morton
Yes secondary index builds are done via the compaction manager.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 17/04/2012, at 1:06 PM, Maxim Potekhin wrote:
I noticed that nodetool compactionstats shows the building of the secondary
Hi Aaron, thanks for the reply. I suspected it might be the
read-and-write that causes the slower updates.
Regards,
P.
On Tue, Apr 17, 2012 at 11:52, aaron morton aa...@thelastpickle.com wrote:
Secondary indexes require a read and a write (potentially two) for every
update. Regular mutations
Hi,
I'm suffering a problem, which maybe is a feature ( ;) ), but for me
it's rather an annoying problem. I use SimpleAuthenticator and I have
user who should be a kind of Cassandra's keyspace root - he should be
allowed to do everything. So I set:
modify-keyspaces=master
Unluckily, when I
Thanks Aaaron. Just to be clear, every time I do a compaction,
I rebuild all indexes from scratch. Right?
Maxim
On 4/17/2012 6:16 AM, aaron morton wrote:
Yes secondary index builds are done via the compaction manager.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
No, the indexes are not rebuilt every compaction. Only if you manually
rebuild or bootstrap a new node does it use compaction manager to rebuild.
On Tue, Apr 17, 2012 at 9:47 AM, Maxim Potekhin potek...@bnl.gov wrote:
Thanks Aaaron. Just to be clear, every time I do a compaction,
I rebuild
You need to install cql driver for python as it says.
% easy_install cql
If you don't have easy_install, you need to install it first. You will be able
to find easy_install by querying easy_install python on google.
maki
On 2012/04/17, at 20:18, Tamar Fraenkel ta...@tok-media.com wrote:
Thanks Jake. Then I am definitely seeing weirdness, as there are tons of
pending tasks in compaction stats, and tons of index files created in the
data directory. Plus it does tell me that it is building the secondary
index,
and that seems to be happening at an amazingly glacial pace.
I have 2
Well, the since the secondary indexes are themselves column families they
too are compacted along with everything else.
On Tue, Apr 17, 2012 at 10:02 AM, Maxim Potekhin potek...@bnl.gov wrote:
Thanks Jake. Then I am definitely seeing weirdness, as there are tons of
pending tasks in compaction
I understand that indexes are CFs. But the compaction stats says it's
building the
index, not compacting the corresponding CF. Either that's an ambiguous
diagnostic,
or indeed something is not right with my rig as of late.
Maxim
On 4/17/2012 10:05 AM, Jake Luciani wrote:
Well, the since the
Hmm that does sound fishy.
When you run show keyspaces from cassandra-cli it shows which indexes are
built. Are they marked built in your column family?
-Jake
On Tue, Apr 17, 2012 at 10:09 AM, Maxim Potekhin potek...@bnl.gov wrote:
I understand that indexes are CFs. But the compaction stats
Yes. Sorry I didn't mention this, but of course I'm checking on indexes
once in a while.
So yes, they are marked as built.
All of this started happening after a few days of continuous loading
process. Since
the nodes have good hardware (24 cores + SSD), the apparent load on each
node
was
How many indexes are there?
On Tue, Apr 17, 2012 at 10:16 AM, Maxim Potekhin potek...@bnl.gov wrote:
Yes. Sorry I didn't mention this, but of course I'm checking on indexes
once in a while.
So yes, they are marked as built.
All of this started happening after a few days of continuous
The offending CF only has one. The other one, that seems to behave well,
has nine.
Maxim
On 4/17/2012 10:20 AM, Jake Luciani wrote:
How many indexes are there?
On Tue, Apr 17, 2012 at 10:16 AM, Maxim Potekhin potek...@bnl.gov
mailto:potek...@bnl.gov wrote:
Yes. Sorry I didn't mention
Thanks!!!
Two simple actions
1. sudo apt-get install python-setuptools
2. sudo easy_install cql
And it did the trick!
But just to be on the safe side, before I move to upgrade our staging
environment, does anyone know a detailed description of how to upgrade
cassandra installed from
Hi all,
We are evaluating Cassandra for a geographically distributed deployment
that requires multi master replication.
We have a few questions regarding how replication is handled in Cassandra,
like:
1. Which mechanism is used to replicate the changes from one system to
another:
Hi!
I want to understand how incrementing of counter works.
- I have a 3 node ring,
- I use FailoverPolicy.FAIL_FAST,
- RF is 2,
I have the following counter column family
ColumnFamily: tk_counters
Key Validation Class: org.apache.cassandra.db.marshal.CompositeType(
Sorry, I found the issue. The server I was using had 32bit java installed.
-Original Message-
From: Sylvain Lebresne [mailto:sylv...@datastax.com]
Sent: Monday, April 16, 2012 11:39 PM
To: user@cassandra.apache.org
Subject: Re: [RELEASE CANDIDATE] Apache Cassandra 1.1.0-rc1 released
On
64bit is recommended where that's available.
If you actually did have a 32bit machine or VM, then you should
dramatically reduce the commitlog space cap to the minimum of 128MB so
it doesn't need to mmap so much.
On Tue, Apr 17, 2012 at 1:45 PM, Bryce Godfrey
bryce.godf...@azaleos.com wrote:
On Sat, Apr 14, 2012 at 3:27 AM, Radim Kolar h...@filez.com wrote:
forceUserDefinedCompaction would be more usefull if you could do compaction
on 2 tables.
You absolutely can. That's what the user defined part is: you give
it the exact list of sstables you want compacted.
--
Jonathan Ellis
On Sat, Apr 14, 2012 at 4:08 AM, Igor i...@4friends.od.ua wrote:
Assume I insert all my data with TTL=2weeks and let we have sstable A which
was created week ago at the time T, so I know that right now it contain:
1) some data that were inserted not later than T and may-be not expired yet
2)
Absolutely. Best practice is still to disable swap entirely on server
machines; mlockall is just our best attempt to at least keep your JVM
from swapping if you've forgotten this.
On Thu, Apr 12, 2012 at 11:15 AM, Omid Aladini omidalad...@gmail.com wrote:
Hi,
Cassandra issues an mlockall [1]
On Sun, Apr 15, 2012 at 2:47 PM, sj.climber sj.clim...@gmail.com wrote:
Also, I see in 1.0.9 there's a fix for a potentially related issue (see
https://issues.apache.org/jira/browse/CASSANDRA-4023). Any thoughts on
this?
My thought is, upgrading is a no-brainer if that's a pain point for you.
Swappiness is actually a fairly weak hint to linux:
http://www.linuxvox.com/2009/10/what-is-the-linux-kernel-parameter-vm-swappiness
On Sat, Apr 14, 2012 at 1:39 PM, aaron morton aa...@thelastpickle.com wrote:
From https://help.ubuntu.com/community/SwapFaq
swappiness=0 tells the kernel to
If I were to take a wild guess, it would be that you're using a single
Thrift connection in multiple threads, which isn't supported.
On Mon, Apr 16, 2012 at 6:43 PM, Aniket Chakrabarti
chakr...@cse.ohio-state.edu wrote:
Hi,
I have set up a 4 node cassandra cluster. I am using the Thrift C++
Thank you Jonatathan, I missed this point about converting TTL data to
tombstones first.
When you say:
You absolutely can. That's what the user defined part is: you give
it the exact list of sstables you want compacted.
does it mean that I can use list (not just one) of sstables as
On Tue, Apr 17, 2012 at 11:26 PM, Igor i...@4friends.od.ua wrote:
You absolutely can. That's what the user defined part is: you give
it the exact list of sstables you want compacted.
does it mean that I can use list (not just one) of sstables as second
parameter for userDefinedCompaction?
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