Deletion is not really "removing" data, but it's adding tombstones
(markers) of deletion. They'll be later merged with existing data during
compaction and - in the end (see: gc_grace_seconds) - removed, but by
this time they'll take some space.
http://wiki.apache.org/cassandra/DistributedDeletes
M.
W dniu 16.07.2013 11:46, 杨辉强 pisze:
Hi, all:
I use cassandra 1.2.4 and I have 4 nodes ring and use byte order partitioner.
I had inserted about 200G data in the ring previous days.
Today I write a program to scan the ring and then at the same time delete
the items that are scanned.
To my surprise, the cassandra cost more disk usage.
Anybody can tell me why? Thanks.
