knktc's Notes

A simple pyhs2 example for connecting to HiveServer2 from Python, running a query, and fetching the results.

If a disk keeps getting claimed by LVM because of stale dmraid metadata, disabling and clearing the old RAID signature can help.

If easy_install cannot find protobuf's setup script, try installing it again with an explicit allowed host.

How to choose a better starting sector in parted to avoid partition alignment warnings on large disks.

RabbitMQ restricts the default guest user to localhost by default; here is how to change it, and why it is risky.

A simple way to inspect a multiprocessing Pool and estimate how many tasks are still running by checking pool._cache.

If a Hadoop Streaming Python job cannot import a third-party library, pass PYTHONPATH through -cmdenv.

A tiny shared library that crashes on purpose, useful for testing how Python behaves when a ctypes-loaded C library segfaults.

A modified version of pssh that supports storing a different password for each host in the host list file.

When GPG works in a shell but fails in cron, adding --no-tty and --homedir usually fixes it.