FYI I presented on the current state of cloud-TM at HPTS a week or so ago and there was much interest. I pointed people at our website.
Sent from my iPad On 3 Oct 2013, at 18:16, Paolo Romano <[email protected]> wrote: > Hi all, > > even the Cloud-TM project is officially over, we thought to share with you > one of our last efforts, which unfortunately were a tad too late to make it > into the submitted version of the platform (and deliverables etc). > > This is a scalable, distributed transactional index (B+tree) over ISPN, which > combines a number of optimizations (in areas like data locality, concurrency, > load balancing/elastic scaling) and builds over previous work (in particular, > GMU [1] and Bumper [2]) that made it possible to achieve linear scalability > up to 100 VMs even in update intensive workloads. > > Hot features: > - at most 1 remote data access per each index operation thanks to : > i) transaction migration, > ii) combined use of full and partial replication (transparent and > self-tuning depending on cluster size), > iii) optimized data placement via customi hash functions > - almost total avoidance of data contention thanks to the exploitation of > commutativity operations on the index (via dirty reads and delayed actions) > - it's built directly on top of ISPN (it does not depend on Fenix, unlike the > collections' implementation that were used, e.g., by GeoGraph ). > > Details in the attached paper! > > We believe that this index implementation could be something generally useful > for the ISPN community, especially given all the recent efforts in the areas > of query. On the other hand, we should point out that the current > implementation [3]: > i) depends on transactional features (transaction migration, dirty reads, > delayed actions) that have not been integrated in the official version of > ISPN; > ii) has been for the moment implemented as a Radargun extension, i.e. no > effort was spent to modularize it/polish its API. > > ...so it would take some effort to have it fully integrated in the master > version of ISPN.... but you know the saying: no pain no gain ;-) > > We'd love to hear your feedback of course! > > Nuno & Paolo > > [1] Sebastiano Peluso, Pedro Ruivo, Paolo Romano, Francesco Quaglia, and Luis > Rodrigues,When Scalability Meets Consistency: Genuine Multiversion Update > Serializable Partial Data Replication, 32nd International Conference on > Distributed Computing Systems (ICDCS 2012) > > [2] Nuno Diegues and Paolo Romano,Bumper: Sheltering Transactions from > Conflicts,The 32th IEEE Symposium on Reliable Distributed Systems > (SRDS 2013), Braga, Portugal, Oct. 2013 > > [3] https://github.com/cloudtm/sti-bt > <STI-BT-report.pdf> > ------------------------------------------------------------------------------ > October Webinars: Code for Performance > Free Intel webinars can help you accelerate application performance. > Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from > the latest Intel processors and coprocessors. See abstracts and register > > http://pubads.g.doubleclick.net/gampad/clk?id=60134791&iu=/4140/ostg.clktrk > _______________________________________________ > Cloudtm-discussion mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/cloudtm-discussion
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