> on Saturday the 30th of January I am scheduled to give a presentation > titled "Gluster roadmap, recent improvements and upcoming features": > > https://fosdem.org/2016/schedule/event/gluster_roadmap/ > > I would like to ask from all feature owners/developers to reply to this > email with a short description and a few keywords about their features. > My plan is to have at most one slide for each feature, so keep it short. === NSR * journal- and server-based (vs. client-based AFR) * better throughput for many workloads * faster, more precise repair * SSD-friendly * (some day) internal snapshot capability Some explanation, so you're not just reading the slides or in case you're asked. * On throughput, NSR does not split each client's bandwidth among N servers, and generates a nice sequential I/O pattern on each server (into the journals). These effects tend to outweigh any theoretical increase in latency due to the extra server-to-server "hop" - as is clearly demonstrated by other systems already using this approach. * WTF does "SSD-friendly" mean? It means that NSR can trivially be configured to put journals on a separate device from the main store. Since we do full data journaling, that means we can serve newly written data from that separate device, which can be of a faster type. This gives us a simple form of tiering, independently of that implemented in DHT. However, unlike Ceph, we do not *require* the journal to be on a separate device. * Similarly, because journals are time-based and separate from the main store, simply skipping the most recent journal segments on reads gives us a kind of snapshot. This is a feature of the *design* that we might exploit some day, but certainly not of the 4.0 *implementation*. The nice thing about it is that it's completely independent of the underlying local filesystem or volume manager, so (unlike our current LVM-biased approach) it can work on any platform. _______________________________________________ Gluster-devel mailing list Gluster-devel@xxxxxxxxxxx http://www.gluster.org/mailman/listinfo/gluster-devel
