# 正文

Middle English: from Old French ferme, from medieval Latin firma ‘fixed payment’, from Latin firmare ‘fix, settle’ (in medieval Latin ‘contract for’), from firmus ‘constant, firm’; compare with firm2. The noun originally denoted a fixed annual amount payable as rent or tax; this is reflected in farm (sense 3 of the verb), which later gave rise to ‘to subcontract’ (farm (sense 2 of the verb)). The noun came to denote a lease, and, in the early 16th century, land leased for farming. The verb sense ‘grow crops or keep livestock’ dates from the early 19th century.

1.同cluster，表示集群的意思，比如docker farm

2.同constant，表示恒定，常数的意思

3.同constract，表示抽象（层），虚拟（层），或者表示构建一个抽象层的意思

4.同analysis，表示（数据）分析

farm用作集群的含义