This looks great. Actually, more than BDZ, the intriguing part is CHM as it's order preserving. I guess how it behaves for unseen keys. Do you know about it?
What did you find more intriguing on this topic? :) On 7/19/11 3:02 AM, Casey Stella wrote: > I looked into MPH a while ago and came across Sebastiano's work, but was > even more intrigued by CMPH (http://cmph.sourceforge.net/), > which claims to work on the order of a billion keys. I attempted a java > port of BDZ (acyclic random 3-graphs FTW :) at one point, but gave up as I > found something > else a bit more suitable for my needs. > > On Mon, Jul 18, 2011 at 12:32 PM, Stack <[email protected]> wrote: > >> On Mon, Jul 18, 2011 at 9:22 AM, Claudio Martella >> <[email protected]> wrote: >>> Yes, I had a look at it a while ago. For what I know perfect hashing >>> doesn't work that good for many elements. With millions of items it >>> should be computationally expensive and the probability of finding such >>> a perfect hashing. Did you ever test this out? I think I can easily >>> generate some millions of UUIDs and see how it goes. >> I never tried it. I was just citing the technique. Even if it >> worked, Sebastiano's work is all LGPL so we would not be able to use >> it in our Apache project (unfortunately). >> >> St.Ack >> -- Claudio Martella Free Software & Open Technologies Analyst TIS innovation park Via Siemens 19 | Siemensstr. 19 39100 Bolzano | 39100 Bozen Tel. +39 0471 068 123 Fax +39 0471 068 129 [email protected] http://www.tis.bz.it Short information regarding use of personal data. According to Section 13 of Italian Legislative Decree no. 196 of 30 June 2003, we inform you that we process your personal data in order to fulfil contractual and fiscal obligations and also to send you information regarding our services and events. Your personal data are processed with and without electronic means and by respecting data subjects' rights, fundamental freedoms and dignity, particularly with regard to confidentiality, personal identity and the right to personal data protection. At any time and without formalities you can write an e-mail to [email protected] in order to object the processing of your personal data for the purpose of sending advertising materials and also to exercise the right to access personal data and other rights referred to in Section 7 of Decree 196/2003. The data controller is TIS Techno Innovation Alto Adige, Siemens Street n. 19, Bolzano. You can find the complete information on the web site www.tis.bz.it.
