cassandra

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Does Hector provide APIs to support composite key?

Right now, I have to manually generate the composite key by formatting the subkeys together. It\'s ugly and not efficient. I wonder if Hector provides such set of APIs to handle composite keys 开发者_[详细]

2023-04-05 01:58 分类：问答
How to remove the RowKey?

With PHPC开发者_开发技巧assa I am removing a row. But when I use remove($uuid) the uuid stays in the DB. Is there a way to remove the row and the RowKey?[详细]

2023-04-04 20:02 分类：问答
Time UUID type in pycassa

I\'m having problems with using the time_uuid type as a key in my columnfamily. I want to store my records, and have them ordered by when they were inserted, and then I figured that the time_uuid is a[详细]

2023-04-04 17:56 分类：问答
Safety copy of an Apache Cassandra database

How can I create a safety copy (dump) from Cassandra. Is available any tool like mysqldump? Maybe there is a way to make something like an ISO imag开发者_StackOverflow社区e from database?See http://wi[详细]

2023-04-04 04:32 分类：问答
cassandra node discovery

I just set up a 3 node system with ip addresses \"192.168.0.101\", \"192.168.0.102\", \"192.168.0.103\". I have set the seeds value on the configuration of all three machines as[详细]

2023-04-04 02:20 分类：问答
Hector (Cassandra) Serialize Anomaly

Q. I am using hector (cassandra client) and storing UTF8 type values in columns, on the client side I am using hector\'s StringSerializer to serialize/ deserialize values. It works fine for normal str[详细]

2023-04-03 18:53 分类：问答
Secondary index update issue

I have created KS & CF using cassandra-0.7.8 and inserted some rows and column values(around 1000 rows). Later, I wanted to index 2 column values. So, I issued \'update column family..\' command.[详细]

2023-04-03 11:07 分类：问答
How to load balance Cassandra cluster nodes?

I am using Cassandra-0.7.8 on cluster of 4 machines. I have uploaded some files using Map/Reduce. It looks files got distributed only among 2 nodes. When I used RF=3 it had 开发者_JAVA百科got distribu[详细]

2023-04-03 03:44 分类：问答
cassandra sstable-loader error: "Got an unknow host from describe_ring()"

I am trying to load sstables to cassandra cluster of two nodes with sstable-loader utility provided in cassandra 0.8.4[详细]

2023-04-02 19:05 分类：问答
Hector import TimeUUIDSerializer can't be resolved

I downloaded hector-core-0.8.0-2.tgz for the latest cassandra installed on my machine. When I am trying to import TimeUUIDSerializer in my class, I got the \'import me.prettyprint.cassandra.serializer[详细]

2023-04-02 11:30 分类：问答