JIRA是一个缺陷跟踪管理系统，为针对缺陷管理、任务追踪和项目管理的商业性应用软件，开发者是澳大利亚的Atlassian。JIRA这个名字并不是一个缩写，而是截取自“Gojira”，日文的哥斯拉发音。

采用Docker实现破解版的Jira安装。

In probability theory, the birthday problem, or birthday paradox This not a paradox in the sense of leading to a logical contradiction, but is called a paradox because the mathematical truth contradicts naive intuition: most people estimate that the chance is much lower than 50%. pertains to the probalility that in a set of randomly chosen people some pair of them will have the same birthday. In a group of at least 23 randomly chosen people, there is more than 50% probalility that some pair of them will both have been born on the same day. For 57 or more people, the probability is more than 99%, and it reachese 100% when the number of people reaches 366 (by the pigeon hole principle, ignoring leap yeas). The mathematics behind this problem lead to a well-known cryptographic attack call the birthday attack.

Ceph是一个分布式、可扩展、高可用、性能优异的存储系统平台，支持块设备、文件系统和REST三种存储接口。它是一个高度可配置的系统，并提供了一个命令行界面用于监视和控制其存储集群。Ceph还包含认证和授权功能，可兼容多种存储网关接口，如OpenStack Swift和Amazon S3。