Re: GSoC 2010: ZooKeeper Failure Detector Module
Thank you Adam! I had a first look at you code and your implementation will be certainly useful. Cheers! On Wed, May 5, 2010 at 8:41 PM, Adam Rosien wrote: > Hi Abmar, cool project! > > I wrote an implementation of the Phi Accrual Detector which I would be > happy to donate. It has the nice property that its parameters are > based on expectation odds rather than something more arbitrary like # > retries. > > You can steal it at http://github.com/arosien/failure. It works well > but let me know if you have any suggestions. > > .. Adam > > On Wed, May 5, 2010 at 1:28 PM, Abmar Barros wrote: > > Hello all, > > > > As Henry Robinson first introduced me, my name is Abmar Barros and I am > one > > of the GSoC accepted students for ZooKeeper. > > In the next 4 months, I will be being mentored by Flavio Junqueira in > order > > to improve ZooKeeper's failure detector module. In this project I will > > abstract the failure detection code to a separate module, in order to > make > > the code cleaner and to ease the implementation of new methods. Also, I > will > > implement several failure detectors and I will compare their > appropriateness > > for ZooKeeper. > > > > I have created a page ( > > http://wiki.apache.org/hadoop/ZooKeeper/GSoCFailureDetector) for this > > project in the ZooKeeper wiki and also there is a related JIRA issue ( > > https://issues.apache.org/jira/browse/ZOOKEEPER-702). > > > > Suggestions and specific requirements are always welcome :) > > > > Best regards > > > > -- > > Abmar Barros > > MSc candidate on Computer Science at Federal University of Campina Grande > - > > www.ufcg.edu.br > > OurGrid Team Member - www.ourgrid.org > > Paraíba - Brazil > > > -- Abmar Barros MSc candidate on Computer Science at Federal University of Campina Grande - www.ufcg.edu.br OurGrid Team Member - www.ourgrid.org Paraíba - Brazil
Re: Problems with ZooKeeper apache wiki.
Thanks Paul! Does this mean folks will not be able to upload and download presentations on wiki from now on? If so, what is the alternative for us to upload attachments (such as presentations)? Thanks mahadev On 5/11/10 4:48 PM, "Paul Querna" wrote: > All file attachments have been disabled due to a spammer earlier this week. > > I don't know how soon or if we will enable file attachments again. > > On Tue, May 11, 2010 at 4:36 PM, Mahadev Konar wrote: >> Hi, >> We are having problems with apache wiki wherein we are getting an error of >> >> "You are not allowed to do AttachFile on this page." >> >> Whenever we try to download an attachment from >> >> http://wiki.apache.org/hadoop/ZooKeeper/ZooKeeperPresentations. >> >> As far as I remember this worked fine when I attached the last ppt on the >> wiki. Can you please help us determine what the problem is with the wiki? >> >> Thanks >> mahadev >> >> >>
Re: New ZooKeeper client library "Cages"
Hi Dominic, this looks really interesting thanks for open sourcing it. I really like the idea of providing higher level concepts. I only just looked at the code, it wasn't clear on first pass what happens if you multilock on 3 paths, the first 2 are success, but the third fails. How are the locks cleared? How about the case where the client loses connectivity to the cluster, what happens in this case (both if partial locks are acquired, and the case where all the locks were acquired (for example how does the caller know if the locks are still held or released due to client partitioned from the cluster, etc...)). I'll try d/l the code and looking at it more, I see some javadoc in there as well so that's great. Regards, Patrick On 05/11/2010 04:02 PM, Dominic Williams wrote: Anyone looking for a Java client library for ZooKeeper, please checkout: Cages - http://cages.googlecode.com The library will be expanded and feedback will be helpful. Many thanks, Dominic ria101.wordpress.com
Re: New ZooKeeper client library "Cages"
Hi Dominic, Good to see this. I like the name "cages" :). You might want to post to the list what cages is useful for. I think quite a few folks would be interested in something like this. Are you guys currently using it with cassandra? Thanks mahadev On 5/11/10 4:02 PM, "Dominic Williams" wrote: > Anyone looking for a Java client library for ZooKeeper, please checkout: > > Cages - http://cages.googlecode.com > > The library will be expanded and feedback will be helpful. > > Many thanks, > Dominic > ria101.wordpress.com
Re: ZookeeperPresentations Wiki
I just emailed in...@apache to ask for there help on this. I wasn't able to figure out what the problem is! Thanks for pointing it out. mahadev On 5/11/10 4:01 PM, "Sudipto Das" wrote: > Hi, > > I am trying to download some presentation slides from the > ZookeeperPresentations wiki ( > http://wiki.apache.org/hadoop/ZooKeeper/ZooKeeperPresentations) but I am > facing a weird problem. On clicking on a link for a presentation, I am > getting the error message "You are not allowed to do AttachFile on this > page. Login and try again." I tried creating an account, and even after > that, I get the same error message, except the login suggestion. All > attachment links have an action=AttachFile URL, (e.g. > http://wiki.apache.org/hadoop/ZooKeeper/ZooKeeperPresentations?action=AttachFi > le&do=view&target=zookeeper_hbase.pptxfor > the zookeeper_hbase.pptx file). My intent is to just download the > files. > Please let me know if I am doing something wrong. Sorry for my ignorance, > but I honestly tried out all obvious means to figure out. :( > > Best Regards > Sudipto > > -- > Sudipto Das > PhD Candidate > CS @ UCSB > Santa Barbara, CA 93106, USA > http://www.cs.ucsb.edu/~sudipto
New ZooKeeper client library "Cages"
Anyone looking for a Java client library for ZooKeeper, please checkout: Cages - http://cages.googlecode.com The library will be expanded and feedback will be helpful. Many thanks, Dominic ria101.wordpress.com
ZookeeperPresentations Wiki
Hi, I am trying to download some presentation slides from the ZookeeperPresentations wiki ( http://wiki.apache.org/hadoop/ZooKeeper/ZooKeeperPresentations) but I am facing a weird problem. On clicking on a link for a presentation, I am getting the error message "You are not allowed to do AttachFile on this page. Login and try again." I tried creating an account, and even after that, I get the same error message, except the login suggestion. All attachment links have an action=AttachFile URL, (e.g. http://wiki.apache.org/hadoop/ZooKeeper/ZooKeeperPresentations?action=AttachFile&do=view&target=zookeeper_hbase.pptxfor the zookeeper_hbase.pptx file). My intent is to just download the files. Please let me know if I am doing something wrong. Sorry for my ignorance, but I honestly tried out all obvious means to figure out. :( Best Regards Sudipto -- Sudipto Das PhD Candidate CS @ UCSB Santa Barbara, CA 93106, USA http://www.cs.ucsb.edu/~sudipto
