Can you send us your exact data model? Even though you normally use
Thrift, you may also be able to access the data from CQL, and if so, query
tracing is a very powerful feature in CQL which may describe why there is a
performance difference.
Do you do deletes of data? If so, tombstones really m
I need to sort data on a frequent updated column, such as like count of an
item. The common way of getting data sorted in Cassandra is to have the
column to be sorted on as clustering key. However, whenever such column is
updated, we need to delete the row of old value and insert the new one,
which
Hi,
I would recommend to turn tracing on in CQL. Using this you can find out that
part of the query results in high latency.
http://www.datastax.com/documentation/cql/3.0/cql/cql_reference/tracing_r.html
Regards
Andi
From: yhq...@sina.com [yhq...@sina.com]
Sent
I think Joanne is taking not about bulk loading, but about just general
access as in any standard client driver.
Joanne, this is a pretty broad topic. You would need to have some part of a
website built in some language such as Python or Java or some other
language. Then you would use an appropria
Having the client pass the timestamp is optional, if you do not provide one
from the client, then it will use the server's timestamp.
On Sat, Dec 27, 2014, 6:25 AM Phil Yang wrote:
> sorry for typo.. timestamp which Cassandra uses is independent on the
> timezone.
>
> Usually, it is recommended
Check out this datastax article
http://www.datastax.com/documentation/cassandra/2.0/cassandra/tools/toolsBulkloader_t.html
And code examples can be found here
https://github.com/PatrickCallaghan/datastax-bulkloader-writer-example
You can write a writer in scala or Java which will conv
sorry for typo.. timestamp which Cassandra uses is independent on the
timezone.
Usually, it is recommended to use NTP to reduce the difference of
timestamps in each nodes
2014-12-27 21:20 GMT+08:00 Phil Yang :
> In java,
> http://docs.oracle.com/javase/7/docs/api/java/lang/System.html#currentTim
In java,
http://docs.oracle.com/javase/7/docs/api/java/lang/System.html#currentTimeMillis()
return "the difference, measured in milliseconds, between the current time
and midnight, January 1, 1970 UTC." It means the timestamp which Cassandra
uses is not independent on the timezone.
2014-12-27 21:0
Sorry, but you are still not being clear. In particular, "website data" has
no common, defined meaning. You'll need to use some standard, defined
terminology or specific examples so that we can have some idea what you are
referring to.
The blog post you cited is referring to the Twitter API, presu
Thanks.
I went through some articles which mentioned that the client to pass the
timestamp for insert and update. Is that anyway we can avoid it and
Cassandra assume the current time of the server?
Thanks
Ajay
On Dec 26, 2014 10:50 PM, "Eric Stevens" wrote:
> Timestamps are timezone independent
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