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74.
実測値レベルですが
1 node data -> 300~400GB
join / remove -> about 4 ~6 h
repair -> about 24 h
※但しexpire的に不要なCFは見送ったりしている。
compaction -> ?
75.
最近実行したログより
INFO [CompactionExecutor:1709]
2014-01-03 00:33:56,625
CompactionTask.java (line 221) Compacted
to [/var/lib/cassandra/data/ hoge /fuga /
hoge-fuga-he-16636-Data.db,].
352,943,576,048 to 70,536,103,035 (~19% of
original) bytes for 139,068 keys at
0.157685MB/s. Time: 426,599,477ms.
76.
426,600sec = 7110 minute =
118.5 hour = about 5 days
(;゚Д゚)