inline resp.
On Mon, Jul 9, 2012 at 10:18 AM, prasenjit mukherjee
wrote:
> Thanks Aaron for your response. Some follow up
> questions/assumptions/clarifications :
>
> 1. With RandomPartitioner, on a given node, are the keys sorted by
> their hash_values or original/unhashed keys ?
>
hash value
First is better choice, each filed can be updated separately(write only).
Second you have to take care json yourself (read first-modify-then write).
On Fri, Aug 24, 2012 at 5:45 PM, Roshni Rajagopal <
roshni.rajago...@wal-mart.com> wrote:
> Hi,
>
> Suppose I have a column family to associate a us
good idea in cassandra. but it is more
> complicated for most usage scenarios, so you have to work out if you really
> need the extra flexibility.
>
>
> On 24/08/2012 13:54, samal wrote:
>
> First is better choice, each filed can be updated separately(write only).
> Second you
Yes. may be 0.8.2
current version need specific validation class CounterColumn for CCF, that
only count [+,-,do not replace] stuff, where as normal CF simply just add or
replace.
On Sun, Jul 10, 2011 at 10:39 PM, Aditya Narayan wrote:
> Thanks for info.
>
> Is there any target version in near
.datastax.com/docs/0.8/operations/cache_tuning#configuring-key-and-row-caches
/Samal
Check seed ip is same in all node and should not be loopback ip on cluster.
On Wed, Jul 13, 2011 at 8:40 PM, Ray Slakinski wrote:
> One of our nodes, which happens to be the seed thinks its Up and all the
> other nodes are down. However all the other nodes thinks the seed is down
> instead. The l
>
> >>> cqlsh> UPDATE RouterAggWeekly SET 1310367600 = 1310367600 + 17 WHERE
> >>> KEY = '1_20110728_ifoutmulticastpkts';
> >>> Bad Request: line 1:51 no viable alternative at character '+'
>
I m able to insert it.
___
cqlsh>
cqlsh> UPDATE counts SET 1310367600 = 1310367600 +
so much memory.
>
Reducing max head size wont solve problem, i think it will do more
swapping.
data only does not only count for memory requirement, but no. of memtables,
as each CF has separate memtable and its size, compaction, caching, read
You should upgrade to 0.7 or later.
/samal
I haven't used CQL functionality much, but thirft client
I think what I encounter is exactly this problem!
>
If you want to query over key, you can index keys to other CF, get the
column names (that is key of other CF ). and then query actual CF with keys.
switch away from the random partitioner.
As per my knowledge, there is not such expert training available in India as
of now.
As Sameer said there is enough online material available from where you can
learn.I have been playing with Cassandra since beginning. We can plan for
Meetup/learning session near Mumbai/Pune region.
SSTable is stored on disk not memtable.
Memtable is memory representation of data, which is on flush to create
SSTable on disk.
This is the location where SSTable is stored
https://github.com/apache/cassandra/blob/trunk/conf/cassandra.yaml#L71
Where as Commitlog which is back up (log) for memta
Any ways , some where memtable has to be stored right, like we say memtable
data is flushed to create sstable on disk.
> Exactly from which location or memory it will be getting from. is it like
> an objects streams or like it is storing the values in commitlog.
>
A Memtable is Cassandra's in-mem
from ROW CACHE {if enabled} -->KEY CACHE-->MEMTABLE-->SSTABLE
On Wed, Jul 27, 2011 at 1:19 PM, CASSANDRA learner <
cassandralear...@gmail.com> wrote:
> Hi,
>
> I am having one doubt regarding reads. The data will be stored in
> commitlog,memtable,sstables right.. While reading the data may be ava
> "ERROR 08:53:47,678 Internal error processing batch_mutate
> java.lang.IllegalStateException: replication factor (3) exceeds number
> of endpoints (1)"
>
You already answered
"It always keeps showing only one node and mentions that it is handling 100%
of the load."
> On Tue, Aug 2, 2011 at 7:2
"ERROR 08:53:47,678 Internal error processing batch_mutate
>> java.lang.IllegalStateException: replication factor (3) exceeds number
>> of endpoints (1)"
>>
> You already answered
> "It always keeps showing only one node and mentions that it is handling
> 100% of the load."
>
Cluster think only on
yes for 0.7
no for 0.8
I don't know much about this, may help you..
http://www.codefreun.de/apolloUI/
http://www.codefreun.de/apollo/
On Wed, Aug 3, 2011 at 3:36 PM, CASSANDRA learner <
cassandralear...@gmail.com> wrote:
> Hiii,
>
> Can any one pleaze send me any sample application which is (.war)
> implemented in j
did u compile source code? :)
you have downloaded source code not binary.
try with binary.
On Wed, Aug 3, 2011 at 9:14 PM, Eldad Yamin wrote:
> Hi,
> I'm trying to install Cassandra on Amazon EC2 without success, this is what
> I did:
>
>1. Created new "Small" EC2 instance (this is just for
:
seeds: node1,node2, autobootstrap=true
node4:
seeds: node1, node2,autobootstrap=true
node5:
seeds: node1,node2, autobootstrap=true
/Samal
On Tue, Aug 9, 2011 at 9:16 AM, Selva Kumar wrote:
> We have a 5 node Cassandra cluster. We use version 0.7.4. What is the
> recommende
Does it really make sense?
If yes, I think Apache Cassandra Project (ASF) should offer Open
Certification. Other entity can offer courses, training materials.
Let's catch up. I am available in Mumbai.
Using C* in dev env. Love to share or hear experience's.
On Fri, Nov 11, 2011 at 10:25 PM, Adi wrote:
> Hey GeekTalks/any other cassandra users around Mumbai/Pune,
>
> I will be around Mumbai from last week of Nov through Third week of
> December. I have
> > I need to add 'search users' functionality to my application. (The
>> trigger for fetching searched items(like google instant search) is made
>> when 3 letters have been typed in).
>> >
>> > For this, I make a CF with String type keys. Each such key is made of
>> first 3 letters of a user's na
& store cols, for all users of that name, containing userId
>> inside that row. That way it would have to read multiple rows while user is
>> doing a single search.
>>
>>
>> On Wed, Nov 16, 2011 at 10:47 AM, samal wrote:
>>
>>>
>>> > I nee
n have aditya name
adi{
{tya,1}
.
.
}
but only few ppl will have name with x or y.
On Thu, Nov 17, 2011 at 3:29 AM, Aditya wrote:
> Thanks to samal who pointed to look at the composite columns. I am now
> using composite columns names containing username+userId & valueless
> colum
Lower your heap size, if you are testing multiple instance with single
node.
https://github.com/apache/cassandra/blob/trunk/conf/cassandra-env.sh#L64
On Sun, Dec 4, 2011 at 11:08 PM, Harald Falzberger
wrote:
> Hi,
>
> I'm trying to set up a test environment with 2 nodes on one physical
> machin
metadata_column:ttl
}*
}
2.
userIdCF:{
*user1:{
id:user1 //*hack : to prevent unwanted behavior one column with no ttl.*
cart1:cart1_uuidkey:ttl
cart2:ttl
cart3:ttl
}
user2:{
id:user2
cart1:cartX_uuidkey:ttl
cart2:cart4:ttl
cart3:cartMttl
}*
}
/Samal
On Mon, Dec 5, 2011 at 7:59 PM, Norman Maurer
wrote:
> As far as I know its the library that was developed by "rackspace".
>
> See
> https://github.com/racker/node-cassandra-client
>
*No longer maintained. it is moved as separate project in apache-extras *
2011/12/5 Joe Stein
> Hey folks, so
key_validation_class is different from validation_class
validation are BytesType by default.
key_valdation_class => key
default_validation_class=>column_values
comparator=>column_name
default_validation_class is global scope of validation_class
On Mon, Dec 5, 2011 at 10:10 PM, Dinusha Dilrukshi
Cassandra has distributed architecture. So 1 node does not fit into it.
although it can used but you loose its benefits , ok if you are just
playing around, use vm to learn how cluster communicate, handle request.
To get full tolerance, redundancy and consistency minimum 3 node is
required.
Imp
I would take simple approach. create one other CF "UserSkill" with row key
same as profile_cf key,
In user_skill cf will add skill as column name and value null. Columns can
be added or removed.
UserProfile={
'*ben*'={
blah :blah
blah :blah
blah :blah
}
}
UserSkill={
'*ben*'={
plus it is fully compatible with CQL.
SELECT * FROM UserSkill WHERE KEY='ben';
On Mon, Mar 26, 2012 at 9:13 PM, samal wrote:
> I would take simple approach. create one other CF "UserSkill" with row
> key same as profile_cf key,
> In user_skill cf will add skill
On Mon, Mar 26, 2012 at 9:20 PM, Ben McCann wrote:
> Thanks for the reply Samal.
>
> I did not realize that you could store a column with null value.
>
values can be null or any value like
[default@node] set hus['test']['wowq']='\{de\'.de\;\}\+\^
he columns for values. You don't need the
>>> column-values to hold multiple columns (the super-column principle). So a
>>> normal CF would work.
>>>
>>>
>>> 2012/3/26 Ben McCann
>>>
>>>> Thanks for the reply Samal. I did not
On Tue, Mar 27, 2012 at 1:47 AM, R. Verlangen wrote:
> " but any schema change will break it "
>
> How do you mean? You don't have to specify the columns in Cassandra so it
> should work perfect. Except for the "skill~" is preserverd for your list.
>
In case skill~ is decided to change to skill
YEAH! agree, it only matter for time bucket data.
On Tue, Mar 27, 2012 at 12:31 PM, R. Verlangen wrote:
> That's true, but it does not sound like a real problem to me.. Maybe
> someone else can shed some light upon this.
>
>
> 2012/3/27 samal
>
>>
>>
&g
Each node need its own HDD for multiple copies. cant share it with others
node.
On Thu, Apr 26, 2012 at 8:52 AM, Benny Rönnhager <
benny.ronnha...@thrutherockies.com> wrote:
> Hi!
>
> I am building a database with several hundred thousands of images.
> have just learned that HaProxy is a very goo
any better approach?
Thanks,
>>>Samal
On Mon, Apr 30, 2012 at 4:25 PM, Morgan Segalis wrote:
> Hi Aaron,
>
> Thank you for your answer, I was beginning to think that my question would
> never be answered ;-)
>
> Actually, this is what I was going for, except one thing, instead of
> partitioning row per month, I though about partition
On Mon, Apr 30, 2012 at 5:52 PM, Morgan Segalis wrote:
> Hi Samal,
>
> Thanks for the TTL feature, I wasn't aware of it's existence.
>
> Day's partitioning will be less wider than month partitionning (about 30
> times less give or take ;-) )
> Per day i
r of
> seconds in a day).
>
>
> On Mon, Apr 30, 2012 at 1:46 AM, samal wrote:
>
>> Hello List,
>>
>> I need suggestion/ recommendation on time series data.
>>
>> I have requirement where users belongs to different timezone and they can
>> subscribe
console.log("Modulo i%86400=> ",i%86400);
console.log("== ");
},2000);
Am I doing wrong?
On Mon, Apr 30, 2012 at 9:54 PM, Tyler Hobbs wrote:
> Correct, that's exactly what I'm saying.
>
>
> On Mon, Apr 30, 2012 at 10:37 AM, sama
pr 30, 2012 at 10:44 PM, Tyler Hobbs wrote:
> getTime() returns the number of milliseconds since the epoch, not the
> number of seconds: http://www.w3schools.com/jsref/jsref_gettime.asp
>
> If you divide that number by 1000, it should work.
>
>
> On Mon, Apr 30, 2012 at 11:28 AM, s
hhmm. I will try both. thanks
On Mon, Apr 30, 2012 at 11:29 PM, Tyler Hobbs wrote:
> Err, sorry, I should have said ts - (ts % 86400). Integer division does
> something similar.
>
>
> On Mon, Apr 30, 2012 at 12:39 PM, samal wrote:
>
>> thanks I didn't noticed.
this will work.I have tried both gave one day unique bucket.
I just realized, If I sync all clients to one zone then date will remain
same for all.
One Zone date will give materialize view to row.
On Mon, Apr 30, 2012 at 11:43 PM, samal wrote:
> hhmm. I will try both. thanks
>
>
>
27;=>'abhiskek'
'name_atul'=>'atul'
}
here you can do slice query on column name and get desired result.
/samal
On Tue, May 15, 2012 at 3:29 PM, selam wrote:
> Mapreduce jobs may solve your problem for batch processing
>
>
> On Tue, May 15, 2012
I have not used CC but yes you can.
Below is not composite column. It is not not column with JSON hash value.
Column value can be anything you like.
date inside value are not indexed.
On Tue, May 15, 2012 at 9:27 AM, Abhijit Chanda
wrote:
> Is it possible to create this data model with the help o
It is just column with JSON value
On Tue, May 15, 2012 at 4:00 PM, samal wrote:
> I have not used CC but yes you can.
> Below is not composite column. It is not not column with JSON hash value.
> Column value can be anything you like.
> date inside value are not indexed.
>
>
n numbers of
column]"*
comaprator=CompositeType(UTF8Type1,UTF8Type2,...,n)
/Samal
On Thu, May 17, 2012 at 10:40 AM, Abhijit Chanda
wrote:
> Aaron,
>
> Actually Aaron i am looking for a scenario on super columns being replaced
> by composite column.
> Say this is a data
dra-sf-2011and
Joe
http://www.youtube.com/watch?v=EBjWlH4NPMA , it will help you understand
data model.
@samalgorai
On Thu, May 17, 2012 at 12:29 PM, Abhijit Chanda
wrote:
> Samal,
>
> Thanks buddy for interpreting. Now suppose i am inserting data in a column
> family using this data mod
ed from IOS or
andriod.
KEY, concat can also be use to filter out more deep: IOS#safari,
andriod#chrome.
Less number of columns will help to reverse index more efficiently.
/Samal
On Mon, May 21, 2012 at 11:53 PM, Tamar Fraenkel wrote:
> Indeed I took the not delete approach. If time bucket rows
Not ideally, now cass has global memtable tuning. Each cf correspond to
memory in ram. Year wise cf means it will be in read only state for next
year, memtable will still consume ram.
On 22-May-2012 5:01 PM, "Franc Carter" wrote:
> On Tue, May 22, 2012 at 9:19 PM, aaron morton wrote:
>
>> It's
Host not found in client.
On 22-May-2012 4:34 PM, "Abhijit Chanda" wrote:
> Hi All,
>
> Can any one suggest me why i am getting this error in Astyanax
> NoAvailableHostsException: [host=None(0.0.0.0):0, latency=0(0),
> attempts=0] No hosts to borrow from
>
>
> Thanks In Advance
> Abhijit
>
iterate over each column -- more precisly: *bunches of columns*
> using slices -- and write new columns in the inversed index.
> Tamar's data model is made for real time analysis. It's maybe overdesigned
> for a daily ranking.
> I agree with Samal, you should split your data acro
Data will remain till next compaction but won't be available. Compaction
will delete old sstable create new one.
On 22-May-2012 5:47 PM, "Pieter Callewaert"
wrote:
> Hi,
>
> ** **
>
> I’ve had my suspicions some months, but I think I am sure about it.
>
> Data is being written by the SST
Are you able to connect through cli?
Can you share your client code?
On 22-May-2012 5:59 PM, "Abhijit Chanda" wrote:
> Samal,
>
>
> But I am setting up the Host.
>
> On Tue, May 22, 2012 at 5:30 PM, samal wrote:
>
>> Host not found in client.
>&
Change your comparator to utf8type.
On 22-May-2012 4:32 PM, "Roshan Dawrani" wrote:
> Hi,
>
> I use Cassandra 0.8.5 and am suddenly noticing some strange behavior. I
> run a "create column family" command with some column meta-data and it runs
> fine, but when I do "describe keyspace", it shows m
Type
> Index Name: ACUserIdIdx
> Index Type: KEYS
> ----
>
> On Tue, May 22, 2012 at 6:16 PM, samal wrote:
>
>> Change your comparator to utf8type.
>> On 22-May-2012 4:32 PM, "Roshan Dawrani" wrote:
>>
>>> Hi,
>>>
&
t; wrote:
> >> Data will not be deleted when those keys appear in other stables
> outside of
> >> compaction. This is to prevent obsolete data from appearing again.
> >>
> >> yuki
> >>
> >> On Tuesday, May 22, 2012 at 7:37 AM, Pieter Callewa
get_range
/Samal
On Thu, May 24, 2012 at 11:52 AM, Prakrati Agrawal <
prakrati.agra...@mu-sigma.com> wrote:
> 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 spe
cf_bucket _data, and deleting that cf few days later, this will keep cf
count fixed.
current cf count=n,
bucket cf count= b*n
using separate cluster old data analytic.
/Samal
On Fri, Jun 1, 2012 at 9:58 AM, Harshvardhan Ojha <
harshvardhan.o...@makemytrip.com> wrote:
> Problem s
If you use thrift API, you have to maintain lot of low level code by
yourself which is already being polished by HLC hector, pycassa also with
HLC your can easily switch between thrift and growing CQL.
On Mon, Jun 4, 2012 at 3:00 PM, R. Verlangen wrote:
> You might consider using a higher level
r may not have liberty to define their own
data model. Good for fixed pattern data: logger, hits, geodata.
/Samal
>>
>>
>
>> On Thu, 31 May 2012 06:44:05 +0900, aaron morton
>> wrote:
>>
>> - Do a lot of keyspaces cause some problems? (If I have 1,000 users,
level 2 is used both node must be UP to read and
write.
It doesn't matter which node you connect, if your data is present in
cluster it will be read directly or through coordinator node.
Read hector doc-
http://hector-client.github.com/hector/build/html/documentation.html
/Samal
On We
You can't 'invent' columns on the fly, everything has
> to be declared when you declare the column family.
>>
>>
That' s incorrect. You can define name on fly. Validation must be define
when declaring CF
at_event
> (
> ac_event_id int PRIMARY KEY,
> ac_event_type text,
> ev_sev int,
> ac_id text,
> ac_creation timestamp
> ) with compression_parameters:sstable_compression = ''
> ;
>
> -g
>
>
>
>
> On Wed, Jun 13, 2012 at 9:36 PM, samal
> wrote:
thanks Riptano group for ur support in community education.
On Tue, Aug 17, 2010 at 11:15 PM, Jeremy Hanna
wrote:
> The videos of the cassandra summit are starting to be posted, just fyi for
> those who were unable to make it out to SF.
>
> http://www.riptano.com/blog/slides-and-videos-cassandra-
http://www.riptano.com/blog/slides-and-videos-cassandra-summit-2010
It will be gr8.
Samal Gorai
On Thu, Sep 2, 2010 at 10:46 AM, vineet daniel wrote:
> Hi Jonathan
>
> Any plans of coming to India in future ?
>
> ___
> Regards
> Vineet Daniel
> +918106217121
>
conditions.
I use 64 bit linux (ubuntu) with 4GB RAM that is more than sufficient to
play around.
___
*Samal Gora**i*
On Sat, Sep 4, 2010 at 12:05 PM, vineet daniel wrote:
> Hi
>
> I am just curious to know if there is an
Lot of memtables means lot of sstables means lot of disk io.
On 9/7/10, Benjamin Black wrote:
> On Mon, Sep 6, 2010 at 12:41 AM, Janne Jalkanen
> wrote:
>>
>> So if I read this right, using lots of CF's is also a Bad Idea(tm)?
>>
>
> Yes, lots of CFs is bad means lots of CFs is also bad.
>
--
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