I'm looking at the cassandra data model and operations and I'm running
into a number of questions I have not been able to answer:
- what does get_columns_since do? I thought there's only one version of
a column stored. I'm puzzled about the "since" aspect.
- is the Thrift interface for get_su
Jonathan Ellis wrote:
On Thu, Jun 4, 2009 at 12:33 AM, Thorsten von Eicken
wrote:
I'm looking at the cassandra data model and operations and I'm running into
a number of questions I have not been able to answer:
- what does get_columns_since do? I thought there's only o
Isn't the question about how you back up a cassandra cluster, not a
single node? Can you snapshot the various nodes at different times or do
they need to be synchronized? Is there a minimal set of nodes that are
sufficient to back up?
Thorsten
Jonathan Ellis wrote:
bin/nodeprobe snapshot
to
Votes below.
Eric Evans wrote:
Alrighty then. Time to vote on a project logo.
The ballot is made up of all the finalist logos with a rating of either
4 or 5 stars[0], and "None of the Above" (just in case you want to
express your disgust with one or more of the choices).
To vote, reply to the
A simple per keyspace authentication is a much needed feature for
cassandra. This has little to do with "exposed to the outside world".
The ACL on a cassandra server needs to give thrift access to clients,
such as application servers. Without any authentication anyone having
access to any serve
+1
It's not a lot of complexity and it doesn't throw sticks into frameworks
that may model a conventional table as a keyspace.
Thorsten
Jonathan Mischo wrote:
Conditional +1 here:
+1
IF the Keyspace parameter is optional in 0.6 forward, but not
completely eliminated
AND IF login() has an
It sounds like the system is limited by bytes/sec not by ops/sec since
the bottleneck seems to be disk bandwidth. It might be helpful to
compute bytes written per sec at the API level, and then estimate how
often each "API byte" is written to disk and read from disk due to
compactions. That wou
Jonathan Ellis wrote:
On Fri, Dec 4, 2009 at 1:31 PM, Freeman, Tim wrote:
Fundamentally there's only so much I/O you can do at a time. If you
don't have enough, you need to upgrade to servers with better i/o
(i.e. not EC2: http://pl.atyp.us/wordpress/?p=2240&cpage=1) and/or
more ram to cach
