Jonathan Ellis gmail.com> writes:
> You should look at the org.apache.cassandra.db.compaction package and
> read the original leveldb implementation notes at
> http://leveldb.googlecode.com/svn/trunk/doc/impl.html for more
> details.
>
There is an important rule in
http://leveldb.googlecode.co
On Fri, Dec 2, 2011 at 8:13 PM, liangfeng wrote:
> 1.There is no implementation in cassandra1.0 to ensure the conclusion "Only
> enough space for 10x the sstable size needs to be reserved for temporary use
> by
> compaction",so one special compaction may need big free disk space all the
> same.
Jonathan Ellis gmail.com> writes:
>
> I think you're confusing "temporary space used during a compaction
> operation" with "total i/o done by compaction."
>
> Leveled compaction *will* do more i/o than size-tiered, because it's
> enforcing tighter guarantees on how compacted the data is.
>
I think you're confusing "temporary space used during a compaction
operation" with "total i/o done by compaction."
Leveled compaction *will* do more i/o than size-tiered, because it's
enforcing tighter guarantees on how compacted the data is.
On Fri, Dec 2, 2011 at 1:01 AM, liangfeng wrote:
> He
Hello，everyone!
In this
doc(http://www.datastax.com/dev/blog/leveled-compaction-in-apache-cassandra),I
found a conclusion "Only enough space for 10x the sstable size needs to be
reserved for temporary use by compaction".I don't know how can we got this
conclusion,but I guess the author of this d
