Hi folks,
I've been putting couch 10.1 on Solaris 10/x86 through its paces
lately trying to understand its replication performance and
behavior, and have noticed the size of pre-compacted replicas
can vary from one host to another.
In one test, the origin has roughly 1.2 million documents taking
up 263MB of storage, but replicated size varies from one server
to another:
origin : 263MB
replica 1: 0.6GB
replica 2: 0.7GB
replica 3: 1.0GB
As expected the replicas are larger than the compacted origin
database, but I didn't expect such size differences from replica
to replica.
After compacting the origin (again) and the replicas, their
sizes settle down to:
origin: : 262.4MB
replica 1: 262.4MB
replica 2: 262.5MB
replica 3: 262.4MB
I'm trying to understand what the reason could be for the
variance in pre-compacted database sizes. All replicas are
running the same build of CouchDB on the same version of
Solaris, though replica3 is running on newer hardware in a
VMWare container.
Matt
