Any update on this?
On 02/05/2011 12:53 AM, Ali Ahsan wrote:
So do we need to write a script ? or its some thing i can do as a
system admin without involving and developer.If yes please guide me in
this case.
On 02/04/2011 10:36 PM, Jonathan Ellis wrote:
In that case, you should shut down
You can specify reverse order through the API when you slice the cols so I
don't think you need to write a comparator.
Bill-
On Feb 4, 2011 9:45 PM, Aditya Narayan ady...@gmail.com wrote:
Thanks Aaron,
Yes I can put the column names without using the userId in the
timeline row, and when I want
Good morning!
I have a been reading through Cassandra wiki and have some confusion around how
hinted handoffs work.
Here is my scenario:
Five nodes in the ring (A, B, C, D, E)
Replication factor=3
Assume that the replicas for a given key are A, B, C
Assume CL=ONE
During a write operation,
On Sat, Feb 5, 2011 at 6:46 AM, Paul T paulmax6...@yahoo.com wrote:
Good morning!
I have a been reading through Cassandra wiki and have some confusion around
how hinted handoffs work.
Here is my scenario:
Five nodes in the ring (A, B, C, D, E)
Replication factor=3
Assume that the replicas
On Sat, Feb 5, 2011 at 4:12 AM, Ali Ahsan ali.ah...@panasiangroup.com wrote:
Any update on this?
On 02/05/2011 12:53 AM, Ali Ahsan wrote:
So do we need to write a script ? or its some thing i can do as a system
admin without involving and developer.If yes please guide me in this case.
Thanks for replying Edward Capriolo.Will this effect cassandra ring
integrity? Another question is that will cassandra work properly after
this operation.And will it be possible to restore deleted data from
backup?.
in 0.6.X
pkill `pid of cassandra`
rm -rf *
Just wanted to see if someone with experience in running an actual service
can advise me:
how often do you run nodetool compact on your nodes? Do you stagger it in
time, for each node? How badly is performance affected?
I know this all seems too generic but then again no two clusters are
On Sat, Feb 5, 2011 at 11:35 AM, Ali Ahsan ali.ah...@panasiangroup.com wrote:
Thanks for replying Edward Capriolo.Will this effect cassandra ring
integrity? Another question is that will cassandra work properly after this
operation.And will it be possible to restore deleted data from backup?.
On Sat, Feb 5, 2011 at 11:59 AM, buddhasystem potek...@bnl.gov wrote:
Just wanted to see if someone with experience in running an actual service
can advise me:
how often do you run nodetool compact on your nodes? Do you stagger it in
time, for each node? How badly is performance affected?
Hello,
I'm wondering if cassandra is sensitive to the order of index expressions in
(pycassa call) get_indexed_slices?
If I have several column indexes available, will it attempt to optimize the
order?
Thanks,
-- Shaun
Can someone tell me how to represent spatial data (coming from postgis) in
Cassandra?
- Sean
I know nothing about postgis and little about spacial data, but if you're simply
talking about data that relates to some latitude longitude pair, you could
have your row key simply be the concatenation of the two: lat:long.
Can you provide more details about the type of data you're looking to
Thanks Edward. In our usage scenario, there is never downtime, it's a global
24/7 operation.
What is impacted the worst, the read or write?
How does a node handle compaction when there is a spike of writes coming to
it?
Edward Capriolo wrote:
On Sat, Feb 5, 2011 at 11:59 AM, buddhasystem
Thanks for detailed replay
On 02/05/2011 10:01 PM, Edward Capriolo wrote:
On Sat, Feb 5, 2011 at 11:35 AM, Ali Ahsanali.ah...@panasiangroup.com wrote:
Thanks for replying Edward Capriolo.Will this effect cassandra ring
integrity? Another question is that will cassandra work properly after
Hi All
We are planning to upgrade cassanra from 0.6.3 to 0.7 any one can guide
me to web link where i can find upgrade procedure.
That's a good question, Bill.
The data that I'm trying to store begins as a simple point. But, moving fo=
rward, it will become more like complex geometries. I assume that I can si=
mply create a JSON-like object and insert it. Which, for now, that works. =
I'm just wondering if theres a
On Sat, Feb 5, 2011 at 12:48 PM, buddhasystem potek...@bnl.gov wrote:
Thanks Edward. In our usage scenario, there is never downtime, it's a global
24/7 operation.
What is impacted the worst, the read or write?
How does a node handle compaction when there is a spike of writes coming to
it?
Hey all.
I'm using Pycassa to insert some spatial data into Cassandra. Here's where
I am on the tutorial:
http://pycassa.github.com/pycassa/tutorial.html#inserting-data And, I'm not
quite understanding where row-keys come from. What mind-set should I have
when I generate them for the values
Ok let me read it out.
On 02/06/2011 12:20 AM, Tyler Hobbs wrote:
We are planning to upgrade cassanra from 0.6.3 to 0.7 any one can
guide me to web link where i can find upgrade procedure.
NEWS.txt in an 0.7.0 package covers all the details of upgrading quite
well.
--
Tyler Hobbs
On Sat, Feb 5, 2011 at 8:48 AM, Shaun Cutts sh...@cuttshome.net wrote:
Hello,
I'm wondering if cassandra is sensitive to the order of index expressions in
(pycassa call) get_indexed_slices?
No.
If I have several column indexes available, will it attempt to optimize the
order?
Yes.
--
if you have under control parameters like
memtable_throughput memtable_operations which are set per column
family basis then you can directly control adjust by splitting the
memory space between two CFs in proportion to what you would do in
single CF.
Hence there should be no extra memory
you really need to know how you will be pulling the data back out again. you
could use the object id as the row key, timestamp as the column name and
long/lat as the value... that would allow you to query by object is and get
the time sorted location trace... but if you have a lot of frequent
Jonathan,
what's the implementation of that? I.e. is is a product of indexes or nested
loops?
Thanks,
Maxim
--
View this message in context:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/order-of-index-expressions-tp5995909p5996488.html
Sent from the
Hi all -
We're new to Cassandra and have read plenty on the data model, but we wanted
to poll for thoughts on how to best handle this structure.
We have simple objects that have and ID and we want to maintain a history of
all the revisions.
e.g.
MyObject:
ID (long)
name
other fields
Hello Raj,
No it actually doesn't make sense from the point of view of Cassandra;
OrderingPartioner preserves the order of the *keys*. The Ordering will be
done according to the *supercolumn name*. In that case you can set the
ordering with compare_super_with (sorry I don't remember exactly the
Thanks Tyler!
I think I'll have to very carefully take into consideration all these
factors before deciding upon how to split my data into CFs, as this
cannot an objective answer. I am expecting around atleast 8 column
families for my entire application, if I split the data strictly
according to
Thanks for the response!
So.. I *may* have a bug to report (at least I can generate radically different
response times based on expression order with a multiply indexed columnfamily),
but first I'll have to upgrade to a stable version (currently I have 7.0rc2
installed).
I was also wondering
ColumnFamilyStore.scan
On Sat, Feb 5, 2011 at 10:32 PM, Shaun Cutts sh...@cuttshome.net wrote:
Thanks for the response!
So.. I *may* have a bug to report (at least I can generate radically
different response times based on expression order with a multiply indexed
columnfamily), but first
Hi,
I don't know whether my assumption is right or not. When I tried to insert a
Time value into a column I am getting this exception:
vendor/ruby/1.8/gems/thrift-0.5.0/lib/thrift/protocol/binary_protocol.rb:106:in
`write_string'
vendor/ruby/1.8/gems/thrift-0.5.0/lib/thrift/client.rb:35:in
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