tag:blogger.com,1999:blog-19923020.comments2023-08-04T11:04:36.952-04:00Atlas shrugged hereMighty Titanhttp://www.blogger.com/profile/12923390301220863210noreply@blogger.comBlogger285125tag:blogger.com,1999:blog-19923020.post-62852926388847795702022-11-17T18:50:05.972-05:002022-11-17T18:50:05.972-05:00I disagree on the conflcit parts. Even if there is...I disagree on the conflcit parts. Even if there is timestamp to decide which value is latest. both 3 and 5 are not consistent values. 3= 1+2 5=1+4 The actual increment should be 1+6 = 7. Write condition is based on the original value. No transaction solve this race condition and dirty writeAnonymoushttps://www.blogger.com/profile/18040987732496237132noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-42418846047219079182016-09-13T11:11:44.531-04:002016-09-13T11:11:44.531-04:00"we now need not a pinch, but an ounce of res..."we now need not a pinch, but an ounce of responsibility! "<br />:)<br />and, it is response-ability, not accountability, which no law can possibly 'fix'...Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19923020.post-65743441625569319852016-06-11T08:22:38.866-04:002016-06-11T08:22:38.866-04:00Excellent blogs!!!!you have for sharing them effec...<br />Excellent blogs!!!!you have for sharing them effect information..we developer very learning to easy<br /><br /><br /><br /><a href="http://sparkhadoop.com/courses/cassandra-training-in-chennai/" rel="nofollow">Cassandra Training Courses</a>Divithttps://www.blogger.com/profile/00242065948311212692noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-71404656779606375932014-04-02T00:51:58.243-04:002014-04-02T00:51:58.243-04:00Wonder how you were able to keep a straight face t...Wonder how you were able to keep a straight face through all those!!Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19923020.post-75274792267119494252014-04-02T00:45:45.813-04:002014-04-02T00:45:45.813-04:00Hehe Shankar!!Indeed, I remember winning first pri...Hehe Shankar!!Indeed, I remember winning first prize for lemon and spoon at my father's office two decades ago! :P Perhaps the only other sport that requires as much dedication and effort would be the gunny bag race? :DAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-19923020.post-15748059517587521432013-03-07T04:44:47.669-05:002013-03-07T04:44:47.669-05:00KAOS IN CE KLASRUM
We must have often thought En...KAOS IN CE KLASRUM<br /><br /> We must have often thought English spelling is unnecessarily difficult. Just look at the words like cough, plough, rough, through and thorough. The great writer Bernard Shaw wanted to change the alphabet and someone worked out this way of doing it.<br /><br /> In the first year, for example, we would suggest using S instead of soft ‘c’. Sertainly all students in all sities of the land would resieve this news with joy. Then the hard ‘c’ would be replased by ‘k’ sinse both the letters are pronounsed alike. Not only would this klear up the konfusion in the minds of spellers, but typewriters kould be built with one letter less. <br /><br /> There would be great exsitement when it was at last announsed that the troublesome ‘ph’ would hense forth be written ‘f’. This would make words like fotograf twenty persent shorter in print.<br /><br /> In the third year, publik interest in a new alfabet kan be expekted to have reatsed a point where more komplikated shanges are nesessary we would suggest removing double leters whish have always ben a nuisanse and a deterent to akurate speling.<br /><br /> We would al agre that the horible mes of silent ‘e’s in our languag is disgrasful. Therefor, we kould drop this and kontinu to read and writ merily along as though we wer in an atomik ag of edukation. Sins by this tim it would be four years sins any wun had used leter ‘c’ we would then sugest substituting c for th.<br /><br /> Kontinuing cis proses year after year we would eventuali have a reali sensibl languag. After twenti years wi ventyur tu sa cer wud bi no mor of ces teribl trublsum difikultis.<br /><br /> Even Mr. Shaw, wi beliv, wud be hapi in ce noleg cat his drims finali kam tru.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-19923020.post-38165931554435006782013-02-20T23:21:02.379-05:002013-02-20T23:21:02.379-05:00Thanks da Vivek! You were the one who introduced m...Thanks da Vivek! You were the one who introduced me to the blogging world . So thanks for that too ! Mighty Titanhttps://www.blogger.com/profile/12923390301220863210noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-15226191896689954852013-02-10T11:47:33.089-05:002013-02-10T11:47:33.089-05:00Hey da,
Congrats! And may the next 10,000 visits ...Hey da,<br /><br />Congrats! And may the next 10,000 visits happen sooner!Vivekanand Mhttps://www.blogger.com/profile/09707039058447478215noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-88190029067449167462013-01-27T14:49:15.567-05:002013-01-27T14:49:15.567-05:00A very nice write up on the various definitions of...A very nice write up on the various definitions of consistency - from the horse's mouth! <br /><br />http://www.allthingsdistributed.com/2007/12/eventually_consistent.html<br /><br />Thanks Dr.Vogels ! Mighty Titanhttps://www.blogger.com/profile/12923390301220863210noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-75620034090523926032012-12-07T00:32:28.319-05:002012-12-07T00:32:28.319-05:00I agree that the motivation behind the systems are...I agree that the motivation behind the systems are very different, I'm just currently thinking about the true consistency guarantees of the system and potentially modifying it for a research project. Maybe a way to combine the speed of Cassandra while occasionally offering a stronger guarantee.<br /><br />I'm still learning the architecture and behavior of Cassandra, so excuse my misunderstanding if this situation is not possible...<br /><br />I was picturing a scenario where a few of the nodes die, so the other nodes need to replicate the particular object back to N.<br /><br />However the system won't know exactly when the failed replicas resume, which might introduce N+1 or so replicas of the object in the system. Then my previously stated situation would occur when the client is only aware of N nodes, writes to 1, fails, and then hears back from the other N.<br /><br />How does Cassandra handle replication when nodes go down?Philhttps://www.blogger.com/profile/02281470386489435753noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-37854003667599358102012-12-07T00:01:34.038-05:002012-12-07T00:01:34.038-05:00Absolutely. As one of my example shows, a failed w...Absolutely. As one of my example shows, a failed write that leaks a value can result in non-deterministic read value for until a subsequent read correction corrects it. <br /><br />I'm curious why you'd think the per-key consistency breaks when W=1 and R=N, since ANY read will ensure that the values are consistent (and latest too) before responding back. <br /><br />While I agree that a consensus algorithm needs to provide better guarantees, I think Cassandra was designed in a different spirit, trading off stronger guarantees for better speed and simplicity. It is interesting that you compared this with Spanner (I'm a big fan of this particular work of Google!). While Spanner's consistency model is quite robust, instinctively, I do not think it can perform as fast or scale as seamlessly as a cassandra cluster (despite the neat trick of co-location using their tablets). Mighty Titanhttps://www.blogger.com/profile/12923390301220863210noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-61271943395034302612012-12-06T23:47:41.184-05:002012-12-06T23:47:41.184-05:00I think even per-key sequential consistency is too...I think even per-key sequential consistency is too strong of a classification, although it might behave that way under good conditions. <br /><br />If you W=1 and R=all, but the node that hold's the new write fails, you will have a permutation of operations that isn't sequential anymore.<br /><br />I agree that the system is eventually consistent, but I also believe with it's current architecture that's the strongest guarantee that the system can provide. <br /><br />Well now that I think about it some more, perhaps if you use W=R=quorum then that might tolerate a few failures, but I still think a real consensus algorithm needs to be used to provide more than eventually consistency. <br /><br />Philhttps://www.blogger.com/profile/02281470386489435753noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-88527859947226161702012-12-06T23:39:21.426-05:002012-12-06T23:39:21.426-05:00A very valid point. The fundamental point at which...A very valid point. The fundamental point at which this classification breaks is when Cassandra leaks a failed write.<br /><br />The definition of consistency is an absolute mess with many systems and implementations coming up with their own nomenclature and definitions. The closest fit for cassandra's model that I could find is per-key sequential consistency (only when r + w > n). That the authors of cassandra claim eventual consistency is based on this definition - A system is eventually consistent if at point of time the writes were stopped and ALL the reads after a certain interval of time (read eventually) observe the value written by the last write. Mighty Titanhttps://www.blogger.com/profile/12923390301220863210noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-36940131090050274722012-12-06T23:25:21.085-05:002012-12-06T23:25:21.085-05:00I disagree that you can classify Cassandra as stro...I disagree that you can classify Cassandra as strongly consistent if it can't tolerate failures, <i>especially as a distributed environment</i>.<br /><br />The label of providing strongly consistent data should only be used on systems which use a proven consensus algorithm such as Google's Spanner using Paxos.<br /><br />That being said, good summary.Philhttps://www.blogger.com/profile/02281470386489435753noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-82480880972485213222012-07-31T20:58:54.282-04:002012-07-31T20:58:54.282-04:00Rest assured, I shall draw first blood! I believe ...Rest assured, I shall draw first blood! I believe I'm missing out big time on the get-togethers and weddings!! You lucky goons.Mighty Titanhttps://www.blogger.com/profile/12923390301220863210noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-18520561190466733022012-07-30T18:50:04.286-04:002012-07-30T18:50:04.286-04:00The pleasure of gobbling lentil donuts...ask a cer...The pleasure of gobbling lentil donuts...ask a certain Mr. Hari once he comes there ;-)Vivekanand Mhttps://www.blogger.com/profile/09707039058447478215noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-33991239470704483332012-05-24T14:24:16.330-04:002012-05-24T14:24:16.330-04:00Ha.. ha.. I do have first hand experience on '...Ha.. ha.. I do have first hand experience on 'effortless' traveling in Mumbai metro trains. Guess one day, I'll write about that too.Mighty Titanhttps://www.blogger.com/profile/12923390301220863210noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-15545578709461733392012-05-09T15:58:15.445-04:002012-05-09T15:58:15.445-04:00Nice Pictures, Can you please upload more picture...Nice Pictures, Can you please upload more picture of Warangal & Hnmakonda & Kazipet main streetsAshutosh Sharmanoreply@blogger.comtag:blogger.com,1999:blog-19923020.post-72195463317010904142012-02-26T21:24:35.984-05:002012-02-26T21:24:35.984-05:00Shankara, may be you missed to educate your reader...Shankara, may be you missed to educate your readers about Mumbai trains or Delhi Metro where you are a LIFO entity effortlessly. All you need to do is to just be there :).Shri Vigneshhttps://www.blogger.com/profile/05379152887449823519noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-57562739572362456222011-12-04T04:26:39.174-05:002011-12-04T04:26:39.174-05:00This comment has been removed by a blog administrator.Katrina kaifhttp://www.hindimovies.org/katrina-kaif-wallpapers.htmlnoreply@blogger.comtag:blogger.com,1999:blog-19923020.post-89532100975346516042011-12-04T04:21:43.163-05:002011-12-04T04:21:43.163-05:00This comment has been removed by a blog administrator.Jigneshhttp://jigneshbapna.comnoreply@blogger.comtag:blogger.com,1999:blog-19923020.post-31539542747625356042011-10-20T07:51:57.916-04:002011-10-20T07:51:57.916-04:00I agree with your opinion that such mis-spellers s...I agree with your opinion that such mis-spellers should spend more time in middle school than on social networks.Rotihttps://www.blogger.com/profile/09852128613830198942noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-55025918288645503492011-10-14T09:52:01.333-04:002011-10-14T09:52:01.333-04:00Vinessha, I know! All I could find on this piece o...Vinessha, I know! All I could find on this piece of news was a blog in WashingtonPost and the technology section in NYTimes. We just can't get away from the fact that money still rules the roost. <br /><br />http://www.washingtonpost.com/blogs/blogpost/post/dennis-ritchie-father-of-c-programming-language-and-unix-dies-at-70/2011/10/13/gIQADGNbhL_blog.html<br /><br />http://www.nytimes.com/2011/10/14/technology/dennis-ritchie-programming-trailblazer-dies-at-70.htmlMighty Titanhttps://www.blogger.com/profile/12923390301220863210noreply@blogger.comtag:blogger.com,1999:blog-19923020.post-13215874903457409232011-10-14T06:49:07.411-04:002011-10-14T06:49:07.411-04:00I mean this perspective made me feel better, so i ...I mean this perspective made me feel better, so i thot it shd help the few who are hurt at his loss gone unnoticed!Vinesshanoreply@blogger.comtag:blogger.com,1999:blog-19923020.post-55091021139928095912011-10-14T06:47:39.414-04:002011-10-14T06:47:39.414-04:00To make you feel better, if at all Steve Jobs is w...To make you feel better, if at all Steve Jobs is worth being mourned for (well i completely respect and salute his intelligence, no doubt!)like he is being now then it is only because of Dennis Ritchie!there could have been no mac without Unix and no Unix without 'C' and no 'C' but for Dennis Ritchie.R.I.P Sir.Vinesshanoreply@blogger.com