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• How to install ceph on EC2 Amazon Linux AMI

  - by takaomag

  I want to test Ceph (a distributed network storage and file system) on some EC2 hosts which is derived from Amazon Linux AMI (amzn-ami-2011.09.2.x86_64-ebs). The kernel version is 3.2 and btrfs is enabled. But kernel config options related to Ceph (CONFIG_CEPH_FS and CONFIG_BLK_DEV_RBD) seems to be disabled. I have to make a new kernel and register it to amazon ? Or, does someone know more easy way ?

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• Can Tornado communicate with Cassandra, in Non-blocking asynchronous style?

  - by takaomag

  I'm working on a web project, which have to process so many client requests. So I am considering to use Cassandra and tornado. Tornado seems to have a build-in client(tornado.httpclient.AsyncHTTPClient), which can do http Non-Blocking request. But, Cassandra uses Thrift protocol. Using Thrift, Tornado seems to be blocked while quering to Cassandra. Has anyone got expereince? Please suggest how should I do. Or, is there any add-on module for this purpose? Thanks.

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