memcached is BSD licensed, which means companies can do what they will with it...
What would work better is if you released a storage engine for the 1.6 tree. Then we don't have to distribute it, or can at least warn that that particular file is encumbered. On Fri, 25 May 2012, Nezer Zaidenberg wrote: > (Working with Yuval Meir and Limor Gavish on this project) > > IBM has a policy that Open Source products may use it's patent so we > didn't see ARC patent as a barrier. > (PostgreSQL problem was with ARC interfering with closing the source > of PostgreSQL in the future) > > We will also try to setup a parameter so that caching algorithm can be > changed at will. > > There are other algorithm that provides comparable results. > > Nezer > On May 24, 10:12 pm, Yuval M <[email protected]> wrote: > > Hello, > > > > My name is Yuval Meir and I am a M.Sc student in Tel Aviv University. > > As part of my academic research I have implemented the ARC (Adaptive > > Replacement Cache) caching policy in Memcached > > I ran benchmarks using a modified version of memaslap and the results were > > very good: cache misses were reduced by up to to 30% on some loads, and in > > terms of run time, memory usage and CPU usage, my implementation performed > > similar to the original Memcached. > > I attached the diff (based on Memcached 1.4.13) and the results I have so > > far in the excel file (note that it has several tabs). > > > > ARC was introduced in the following publication by Nimrod Megiddo, > > Dharmendra Modha:http://www.almaden.ibm.com/cs/people/dmodha/arcfast.pdf > > which was published in USENIX 2003. > > > > I will be very glad to get you reviewes and comments. > > > > Regards, > > > > Yuval Meir > > Computer Science department > > Tel-Aviv University > > > > memcached_with_arc.patch > > 61KViewDownload > > > > ARC_Memcached_Results_2.xls > > 106KViewDownload >
