Hi, sorry for re-posting, but it would be very helpful to get some
input on my previous post, so I'd know which direction to take.
So if anyone of the more experienced users here can help, it would be
greatly appreciated.
Thank you
Osi
-- Forwarded message --
From: osishkin osishk
I a thinking about a scenario that goes like this: a node is reading a
secondary index to reply to a select query. While in the middle of this,
two rows are mutated, one that has already been read and considered for
the select result, and one that is yet to be processed. Say both rows
where changed
I have jna-3.2.7 in the classpath, but at the start of server messages, I see:
INFO 17:48:12,321 Unable to link C library. Native methods will be disabled.
java.lang.UnsatisfiedLinkError: Error looking up function
'$$YJP$$mlockall': java: undefined symbol: $$YJP$$mlockall
at com.sun.jna.Fu
Hi,
Using 0.7.4, BOP, and RF=3, Write->QUORUM and Read->ONE "NO UPDATES"
How does get_range_slices using Key Range works? Is it possible to get
out of date list of keys?
If a key is inserted into 2 Nodes and after that a read with a key range
is issued, is it possible to have the 3 Node (that do
> cluster name for both machines. So in other words, if we want to launch two
> separate instances of cassandra and keep them separate, we must make sure
> each uses a different cluster name or else they will gang up into the same
> cluster? But how do they even discover each other? Can someone
Okay, so let me get this straight, the command should accept:
-f (-Data.db)
The column family in question uses a UTF8Type Row Key and a composite column
name (UTF8Type, TimeUUID) and UTF8Type Column value.
Do I need to specify the rowkey, validator and comparator types as well?
I'm not sure ho
I do it with a log4j properties file:
log4j.appender.null=org.apache.log4j.varia.NullAppender
log4j.category.me.prettyprint.cassandra.hector.TimingLogger=INFO, null
log4j.additivity.me.prettyprint.cassandra.hector.TimingLogger=false
On Sep 9, 2011, at 2:07 PM, Daning wrote:
> Hi,
>
> How to d
I'm trying to understand where my queries are spending their time,
trying yourkit , vmstat, iostat -x, plus trial and error by
enabling/disabling some features
my application basically creates a lot of entries for "user history",
where each history is a row, and
is maintained to be less than 20
Hi,
How to disable hector stats? We keep getting this in log
(PeriodicalLog.java:221) INFO Thread-53040 2011-09-09 13:24:03,290
Statistics from Fri Sep 09 13:23:03 PDT 2011 to Fri Sep 09 13:24:03 PDT 2011
(PeriodicalLog.java:221) INFO Thread-53040 2011-09-09 13:24:03,291
Tag
Yes.
On Fri, Sep 9, 2011 at 2:49 PM, Yang wrote:
> if all the columns in a row expired, would the row key be deleted ?
> that way the key lookup could possibly be faster due to a smaller key space
>
> Thanks
> Yang
>
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of DataStax, th
Sounds like you told Cassandra a key? column? was UTF8 but it had
non-UTF8 data in it.
On Fri, Sep 9, 2011 at 2:06 PM, Anthony Ikeda
wrote:
> I can't seem to export an sstable. The parameter flags don't work either
> (using -k and -f).
>
> sstable2json
> /Users/X/Database/cassandra_files/data
if all the columns in a row expired, would the row key be deleted ?
that way the key lookup could possibly be faster due to a smaller key space
Thanks
Yang
wouldn't that be ignoring the fact that is just a "prefix" and there is
still the unique key after that prefix ;), so yes it may be just as clumpy
as using OPP but only within a node which I don't really see as a big deal
at that point, or am I missing something? Though maybe the default impl
woul
I can't seem to export an sstable. The parameter flags don't work either
(using -k and -f).
sstable2json
/Users/X/Database/cassandra_files/data/RegistryFoundation/ServerIdentityProfiles-g-3-Data.db
WARN 12:01:55,721 Invalid file '.DS_Store' in data directory
/Users/X/Database/cassandra_fi
Please don't forget that a lot of non-DataStax people contribute to
Apache Cassandra! Thanks to everyone for their contributions.
On Fri, Sep 9, 2011 at 1:29 PM, Evgeniy Ryabitskiy
wrote:
>
>
> 2011/9/9 Roshan Dawrani
>>
>> On Thu, Sep 8, 2011 at 8:21 PM, Stephen Connolly
>> wrote:
>>>
>>> can
2011/9/9 Roshan Dawrani
> On Thu, Sep 8, 2011 at 8:21 PM, Stephen Connolly <
> stephen.alan.conno...@gmail.com> wrote:
>
>> can take up to 12 hours for the sync to central
>>
>
> Nearly 24 hours now, and 0.8.5 still not available at maven central -
> http://mvnrepository.com/artifact/org.apache.c
They are evenly distributed. 5 nodes * 40 connections each using hector, and I
can confirm that all 200 are active when this happened (from hector's
perspective, from graphing the hector jmx data), and all 5 nodes saw roughly 40
connections, and all were receiving traffic over those connections
I just wanted to confirm that we will be able to install Brisk with 0.8.5
cassandra as I am aware of some significant fixes and enhancements to the
latest build of Cassandra.
Anthony
Consider this scenario in a SQL database:
UPDATE foo SET x = 1 WHERE key = 'asdf';
Now, "simultaneously," two clients run
UPDATE foo SET x = 2 WHERE key = 'asdf';
and
SELECT * FROM foo WHERE x = 1;
Either you get back row asdf, or you don't. Either is valid. Same
thing happens with Cassandra
Oh yes, that is cool. I see from the code now (was reading it incorrectly).
So a Quorum with NTS would give me 3 copies across the cluster, not
necessarily 2 local and 1 remote, but for most parts that would be true
since WAN adds to latency.
Thanks
On Thu, Sep 8, 2011 at 3:40 PM, Jonathan Elli
Hi,
Can we configure some column-families (or keyspaces) in Cassandra to perform
as a pure in-memory cache?
The feature should let the memtables always be in-memory (never flushed to
the disk - sstables).
The memtable flush threshold settings of time/ memory/ operations can be set
to a max value
On Fri, Sep 9, 2011 at 10:34 AM, Dean Hiller wrote:
> I saw this quote in the pdf.
>
> "For large indexes with common terms this too much data! Queries with >
> 100k hits"
>
> 1. What would be considered large? In most of my experience, we have the
> typical size of a RDBMS index but just ha
On 9 September 2011 16:48, Stephen Connolly
wrote:
> On 9 September 2011 16:18, Sylvain Lebresne wrote:
>> On Fri, Sep 9, 2011 at 4:52 PM, Stephen Connolly
>> wrote:
>>> is the staging repo released at repository.apache.org? or did somebody
>>> forget to finish that step?
>>
>> Nobody forgot tha
On 9 September 2011 16:18, Sylvain Lebresne wrote:
> On Fri, Sep 9, 2011 at 4:52 PM, Stephen Connolly
> wrote:
>> is the staging repo released at repository.apache.org? or did somebody
>> forget to finish that step?
>
> Nobody forgot that step as can be seen in:
> https://repository.apache.org/co
I see that Cassandra updates secondary indices as soon as a value of the
indexed column is updated. This can happen, for example, during a select
query with a condition on a secondary index. Does Cassandra perform no
checking or locking? Will the result of this select, with old and new
values, be r
On Fri, Sep 9, 2011 at 4:52 PM, Stephen Connolly
wrote:
> is the staging repo released at repository.apache.org? or did somebody
> forget to finish that step?
Nobody forgot that step as can be seen in:
https://repository.apache.org/content/repositories/releases/org/apache/cassandra/apache-cassand
is the staging repo released at repository.apache.org? or did somebody
forget to finish that step?
- Stephen
---
Sent from my Android phone, so random spelling mistakes, random nonsense
words and other nonsense are a direct result of using swype to type on the
screen
On 9 Sep 2011 04:48, "Roshan
I saw this quote in the pdf.
"For large indexes with common terms this too much data! Queries with > 100k
hits"
1. What would be considered large? In most of my experience, we have the
typical size of a RDBMS index but just have many many many more indexes as
the size of the index is just de
Actually, we only need a 8 bit key(one whole byte) because an 8 bit key
would be useful up to 2^8 nodes which I am pretty sure we would never get
too. Of course, I guess we could use one more whole byte just in case ;)
We are planning on doing this ourselvesit would just be nice if it was
hid
Registration here (few seats left) - http://www.cloudcamp.org/delhi
Agenda:
9:30 am - Food, Drinks & Networking
10:00 am - Welcome, Thank yous & Introductions
10:15 am - Lightning Talks (5 minutes each)
10:45 am - Unpanel
11:45 am - Prepare for Unconference Breakout Sessions (solicit breakout t
It is resolved. I used Map/Reduce program, in that I converted long row key as
byte array and stored it as ByteBuffer. Now row key are in sorted order. I can
apply range query.
E.g. $list ip[10001:10005];
Regards,
Thamizhannal P
--- On Fri, 9/9/11, Jonathan Ellis wrote:
From: Jonathan Ell
On Thu, Sep 8, 2011 at 8:21 PM, Stephen Connolly <
stephen.alan.conno...@gmail.com> wrote:
> can take up to 12 hours for the sync to central
>
Nearly 24 hours now, and 0.8.5 still not available at maven central -
http://mvnrepository.com/artifact/org.apache.cassandra/cassandra-all :-(
rgds,
Rosh
On Fri, Sep 9, 2011 at 4:18 AM, Yan Chunlu wrote:
> I have 3 nodes and RF=3. I tried to repair every node in the cluster by
> using "nodetool repair mykeyspace mycf" on every column family. it finished
> within 3 hours, the data size is no more than 50GB.
> after the repair, I have tried using
We'll solve #2890 and we should have done it sooner.
That being said, a quick question: how do you do your inserts from the
clients ? Are you evenly
distributing the inserts among the nodes ? Or are you always hitting
the same coordinator ?
Because provided the nodes are correctly distributed on
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