From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED.yTvCNOh9TRCAIcX40YItlQ.user.gioia.aioe.org!not-for-mail From: "Dmitry A. Kazakov" Newsgroups: comp.lang.ada Subject: Re: ? Are there LDPC error code lib in Ada ? thanks. Date: Sat, 23 Feb 2019 08:49:36 +0100 Organization: Aioe.org NNTP Server Message-ID: References: <42ec3738-180f-468b-9a4b-1763a14bad40@googlegroups.com> <4dfbb6c5-8955-4d3a-b886-4c09427d6d1e@googlegroups.com> NNTP-Posting-Host: yTvCNOh9TRCAIcX40YItlQ.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Complaints-To: abuse@aioe.org User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 X-Notice: Filtered by postfilter v. 0.9.2 Content-Language: en-US X-Mozilla-News-Host: news://news.aioe.org Xref: reader01.eternal-september.org comp.lang.ada:55641 Date: 2019-02-23T08:49:36+01:00 List-Id: On 2019-02-22 23:22, Daniel Norte Moraes wrote: > Main objective is "forward error recover" e.g: > 1) try automatic recover data in engine of distributed database before > need to ask for retransmission data from nodes If transmission errors occur they do not manifest themselves as corrupted data, because the transports already correct these. They do as undelivered data, dropped connections, missed deadlines, lost integrity etc. > 2) and auto-recover for data received. There is no recovery from non-delivery. You can improve situation using redundant nodes and some sort of consensus in the scenario when some nodes might go offline. Error correcting codes is no help at this level of abstraction (application's OSI). -- Regards, Dmitry A. Kazakov http://www.dmitry-kazakov.de