System Administration
Tools for the toolbox
Wednesday, July 24, 2002115 MB per person. Not much when considered alone, but consider it in the aggregate. Most people don't use all of their quota, which is a Good Thing.
6:11:55 PM #
categories: Low-Hanging Fruit, System Administration
Replicants
If there's one thing about Lotus Notes that really stands out it's replication. It is also one of the hardest to explain aspects of Notes, but that may be because of the terminology.
A replica is an copy instance of the data that becomes more like other instances over time. A copy is an instance of the data at a given point in time. Time is critical in understanding replication: at a given time, n number of replicas are not guaranteed to contain the same data, but they will later.
The fascinating thing about replication is that you can distribute the same data broadly, with little regard to distance. Once distance is eliminated as a factor, you can turn your attention to reducing the time when replicas become more identical. Very similar methods are now used by Oracle, Microsoft SQL Server, and LDAP.
I have a similar problem now, but in space and time. I have to distribute files across a wide area, maintaining identical copies at n sites. bangstate's changedfiles looks like what I want, but not all of the systems involved are Linux. rsync won't work because it's not triggered by changes, and the filesystems in question are really deep trees. Hmm. Subversion as a filesystem?
2:58:20 PM # Google It!
categories: System Administration
