We need to write a full article about "cassandra数据库安装", 6-8 paragraphs, each 150-250 Chinese characters. Must be at least 1500 characters total, cannot be less than 1050. Need to ensure each paragraph 150-250 characters (including punctuation?). They said 150-250字, meaning characters. So each paragraph must be between 150 and 250 Chinese characters. Need 6-8 paragraphs. So total characters roughly 6*150 = 900 min, but we need at least 1500 characters, and cannot be less than 1050. Actually requirement: "字数要求：必须写满1500字，不能少于1050字！" That's contradictory: must write 1500 characters, cannot be less than 1050 characters. Likely they want at least 1500 characters, but also not less than 1050 (i.e., must be >=1500). So we need at least 1500 characters. With 6-8 paragraphs each 150-250 characters, if we do 7 paragraphs at 215 avg, we get ~1505 characters, which meets >=1500. So we need 7 paragraphs, each around 215 characters. Ensure each paragraph length is within 150-250 characters. We'll count characters.
We'll write in Chinese, natural, no AI style.
Paragraph 1: intro about why install Cassandra, maybe context.
Paragraph 2: prepare environment, Java version.
Paragraph 3: download and extract.
Paragraph 4: set configuration.
Paragraph 5: start service.
Paragraph 6: test connection.
Paragraph 7: common issues and summary.
We need each paragraph 150-250 characters. Let's craft each approx 215 characters.
We need to count characters. Let's draft paragraph 1:
"在当今大数据处理的场景里，Cassandra因其高可用、容错能力和线性扩展性而备受关注。无论是日志系统、物联网平台，还是实时分析，都需要一个稳定可靠的存储后端。本文将手把手带你完成Cassandra数据库的安装过程，从环境准备到第一次写入数据，力求做到步步清晰、细节完整，让即使是首次接触的同学也能顺利上手。"
Now count characters (including punctuation). Let's count manually.
在当今大数据处理的场景里，Cassandra因其高可用、容错能力和线性扩展性而备受关注。无论是日志系统、物联网平台，还是实时分析，都需要一个稳定可靠的存储后端。本文将手把手带你完成Cassandra数据库的安装过程，从环境准备到第一次写入数据，力求做到步步清晰、细节完整，让即使是首次接触的同学也能顺利上手。
Count characters: I'll count roughly.
"在当今大数据处理的场景里，" = 12? Let's count precisely.
I'll write with indices:
在(1)当(2)今(3)大(4)数(5)据(6)处(7)理(8)的(9)场(10)景(11)里(12)，(13)C(14)a(15)s(16)s(17)a(18)n(19)d(20)r(21)a(22)（maybe Chinese char? Actually "Cassandra" letters count as characters each? They count as characters too. We'll treat each Latin letter as a character. So continue.
But easier: approximate length is fine; we need between 150-250. This paragraph likely around 150-180 characters. Might be slightly less. Let's count more precisely.
I'll copy paragraph and count using approximate grouping.
在当今大数据处理的场景里，Cassandra因其高可用、容错能力和线性扩展性而备受关注。无论是日志系统、物联网平台，还是实时分析，都需要一个稳定可靠的存储后端。本文将手把手带你完成Cassandra数据库的安装过程，从环境准备到第一次写入数据，力求做到步步清晰、细节完整，让即使是首次接触的同学也能顺利上手。
Let's count characters including punctuation and spaces? Usually Chinese punctuation counts as characters. Let's count manually:
Wait we have "Cassandra". Actually letters: C a s s a n d r a -> 9 letters. Let's count: C(14) a(15) s(16) s(17) a(18) n(19) d(20) r(21) a(22). Then "因其高可用、容错能力和线性扩展性而备受关注。" Continue.
23 a? Actually after "r" we have "a" at position 22, then period? Let's continue after "Cassandra". The sentence: "Cassandra因其高可用、容错能力和线性扩展性而备受关注。" So after "Cassandra" there is "因其高可用、容错能力和线性扩展性而备受关注。" Let's count characters from there.
I'll write full paragraph with markers:
在当今大数据处理的场景里，Cassandra因其高可用、容错能力和线性扩展性而备受关注。无论是日志系统、物联网平台，还是实时分析，都需要一个稳定可靠的存储后端。本文将手把手带你完成Cassandra数据库的安装过程，从环境准备到第一次写入数据，力求做到步步清晰、细节完整，让即使是首次接触的同学也能顺利上手。
Now count characters including punctuation and spaces? There are no spaces. Let's count sequentially.
I'll write each character with count:
Wait "容错" is two characters: 容 (30) 错 (31). Actually we have "容错". So after "高可用、容错能力和线性扩展性而备受关注。" Let's continue.
Let's rewrite after "Cassandra": "因其高可用、容错能力和线性扩展性而备受关注。" So characters:
Now continue: "无论是日志系统、物联网平台，还是实时分析，都需要一个稳定可靠的存储后端。" Let's count.
Now next sentence: "本文将手把手带你完成Cassandra数据库的安装过程，从环境准备到第一次写入数据，力求做到步步清晰、细节完整，让即使是首次接触的同学也能顺利上手。" Count.
83? Actually we already at 81, continue:
