I think it comes down to how much you benefit from row range scans, and
how confident you are that going forward all data will continue to use
random row keys.
I'm considering using BOP as a way of working around the non indexes
super column limitation. In my current schema, row keys are random
stamp.
Even if you have a random key, I would use the RP unless you
have an extreme use case.
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 21/12/2011, at 3:06 AM, Bryce Allen wrote:
I think it comes down to how
/2011, at 9:03 AM, Bryce Allen wrote:
I wasn't aware of CompositeColumns, thanks for the tip. However I
think it still doesn't allow me to do the query I need - basically
I need to do a timestamp range query, limiting only to certain file
names at each timestamp. With BOP and a separate
On Fri, 6 Jan 2012 10:38:17 -0800
Mohit Anchlia mohitanch...@gmail.com wrote:
It could be as simple as reading before writing to make sure that
email doesn't exist. But I think you are looking at how to handle 2
concurrent requests for same email? Only way I can think of is:
1) Create new CF
On Fri, 6 Jan 2012 10:03:38 -0800
Drew Kutcharian d...@venarc.com wrote:
I know that this can be done using a lock manager such as ZooKeeper
or HazelCast, but the issue with using either of them is that if
ZooKeeper or HazelCast is down, then you can't be sure about the
reliability of the
the lock, to prevent the issue you
describe below.
There was a pretty detailed discussion of locking with only Cassandra
a month or so back on this list.
-Jeremiah
On 01/06/2012 02:42 PM, Bryce Allen wrote:
On Fri, 6 Jan 2012 10:38:17 -0800
Mohit Anchliamohitanch...@gmail.com wrote
, Jan 6, 2012 at 1:16 PM, Bryce Allen bal...@ci.uchicago.edu
wrote:
This looks like it:
http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Implementing-locks-using-cassandra-only-tp5527076p5527076.html
There's also some interesting JIRA tickets related to locking/CAS:
https
, but I know if you have a partition
between HazelCast nodes, than the nodes can acquire the same lock
independently in each divided partition. How does ZooKeeper handle
this situation?
-- Drew
On Jan 6, 2012, at 12:48 PM, Bryce Allen wrote:
On Fri, 6 Jan 2012 10:03:38 -0800
Drew
I'm storing very large versioned lists of names, and I'd like to
query a range of names within a given range of versions, which is a two
dimensional slice, in a single query. This is easy to do using
ByteOrderedPartitioner, but seems to require multiple (non parallel)
queries and extra CFs when
working, so I'm trying to make a best initial guess.
On 21/01/2012, at 6:20 AM, Bryce Allen wrote:
I'm storing very large versioned lists of names, and I'd like to
query a range of names within a given range of versions, which is a
two dimensional slice, in a single query. This is easy
where the value is less than the lower version ?
Cheers
-
Aaron Morton
Freelance Developer
@aaronmorton
http://www.thelastpickle.com
On 27/01/2012, at 5:31 AM, Bryce Allen wrote:
Thanks, comments inline:
On Mon, 23 Jan 2012 20:59:34 +1300
aaron morton aa
On Mon, 30 Jan 2012 11:14:37 -0600
Bryce Allen bal...@ci.uchicago.edu wrote:
With RP, the idea is to query many versions in ListVersionIndex
starting at the desired version going backward, hoping that it will
hit a compact version. We could also maintain a separate
CompactVersion index
I have a CF defined like this in CLI syntax:
create column family Test
with key_validation_class = UTF8Type
and comparator = 'CompositeType(AsciiType, UTF8Type)'
and default_validation_class = UTF8Type
and column_metadata = [
{ column_name : 'deleted:',
2012 10:25:07 -0600
Bryce Allen bal...@ci.uchicago.edu wrote:
I have a CF defined like this in CLI syntax:
create column family Test
with key_validation_class = UTF8Type
and comparator = 'CompositeType(AsciiType, UTF8Type)'
and default_validation_class = UTF8Type
In case anyone else is curious about what is going on here:
https://github.com/pycassa/pycassa/issues/112
The links to the Cassandra JIRA are instructive.
-Bryce
On Wed, 8 Feb 2012 10:59:37 -0600
Bryce Allen bal...@ci.uchicago.edu wrote:
Never mind; the issue with addressing composite column
15 matches
Mail list logo
