[Cassandra Wiki] Update of "MemtableSSTable" by JonathanEllis

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The "MemtableSSTable" page has been changed by JonathanEllis:
http://wiki.apache.org/cassandra/MemtableSSTable?action=diff&rev1=17&rev2=18

  == Overview ==
- Cassandra writes are first written to the [[Durability|CommitLog]], and then to a per-!ColumnFamily structure called a Memtable.  A Memtable is basically a write-back cache of data rows that can be looked up by key -- that is, unlike a write-through cache, writes are batched up in the Memtable until it is full, before being written to disk as an SSTable.
+ Cassandra writes are first written to the [[Durability|CommitLog]], and then to a per-!ColumnFamily structure called a Memtable.  When a Memtable is full, it is written to disk as an SSTable.
+ 
+ A Memtable is basically a write-back cache of data rows that can be looked up by key -- that is, unlike a write-through cache, writes are batched up in the Memtable until it is full, when it is flushed.
  
  == Flushing ==