Hi--
We are iterating rows in a column family two different ways and are
seeing radically different row counts. We are using 1.0.8 and
RandomPartitioner on a 3-node cluster.
In the first case, we have a trivial Hadoop job that counts 29M rows
using the standard MR pattern for counting
Any advice for renaming a column family in version 1.0.x? Like most of
the docs, the FAQ
(http://wiki.apache.org/cassandra/FAQ#modify_cf_config) is out of date.
Todd
I want to do ranged row queries for a few of my column families, but
best practice seems to be to use the random partitioner. Splitting my
column families between two clusters (one random, one ordered) seems
like a pretty expensive compromise.
Instead, I'm thinking of using the
I added a row with a single column to my 1.0.8 single-node cluster:
RowKey: ----
= (column=test, value=hi, timestamp=...)
I immediately deleted the row using both the CLI and CQL:
del Foo[lexicaluuid('----')];
First, thanks! I'd read that before, but didn't associate doing a range
scan with using the CLI, much less doing select count(*) in CQL. Now I
know what to call the phenomenon.
Second, a followup question: So the row keys will be deleted after 1)
the GC grace period expires, and 2) I do a
My single-node cluster was working fine yesterday. I ctrl+c'd it last
night, as I typically do, and restarted it this morning.
Now, inexplicably, it doesn't know anything about my keyspace. The SS
table files are in the same directory as always and seem to be the
expected size. I can't seem
I found the problem; it was my fault. I made an accidental change to my
cassandra.yaml file sometime between restarts and ended up pointing the
node data directory to a different disk. Check your paths!
Todd
On 2/10/2012 10:22 AM, Todd Fast wrote:
My single-node cluster was working fine
Mutagen Cassandra is a framework providing schema versioning and mutation
for Apache Cassandra. It is similar to Flyway for SQL databases.
https://github.com/toddfast/mutagen-cassandra
Mutagen is a lightweight framework for applying versioned changes (known as
mutations) to a resource, in this
at 11:06 PM, Blair Zajac bl...@orcaware.com wrote:
On 5/16/13 10:22 PM, Todd Fast wrote:
Mutagen Cassandra is a framework providing schema versioning and
mutation for Apache Cassandra. It is similar to Flyway for SQL databases.
https://github.com/toddfast/**mutagen-cassandrahttps://github.com
Franc--
I think you will find Mutagen Cassandra very interesting; it is similar to
schema management tools like Flyway for SQL databases:
Mutagen Cassandra is a framework (based on Mutagen) that provides schema
versioning and mutation for Apache Cassandra.
Mutagen is a lightweight framework
Hi Jonathan--
First, best wishes for success with your platform.
Frankly, I think the architecture you described is only going to cause
you major trouble. I'm left wondering why you don't either use something
like XMPP (of which several implementations can handle this kind of
federated scenario)
There is a team at my work building a entity-attribute-value (EAV) store
using Cassandra. There is a column family, called Entity, where the
partition key is the UUID of the entity, and the columns are the attributes
names with their values. Each entity will contain hundreds to thousands of
FWIW I'd suggest opening a bug--this behavior is certainly quite unexpected
and more than just a documentation issue. In general I can't imagine any
desirable properties of the current implementation, and there are likely a
bunch of latent bugs sitting out there, so it should be fixed.
Todd
On
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