(MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow

Cyberselfish A Critical Romp Through The Terribly Libertarian Culture Of High Tech lAverage book Covers only basics unnecessarily describes things easily found elsewhereike arguments of mongodump or mongo commands Often explains obvious things Recommended only for very BEGINNERS GIVES A GOOD OVERVIEW ON Gives a good overview on concepts with code examples Works as a nice primer for novice and reference point for advanced techies By the title of the book that is The Definitive Guide I was hoping that the authors could point out some kind of work patterns that could be considered as a starting point for the readers to be used as their starting point for the readers to be used as their guidelines at work Although I am aware that it is still too early to consider best practices to work with MongoDBThe documentations provided at mongodborg are definitely self explanatory and I believe I could earn much faster from the documentationsI am a bit disappoint actually that s why I rated this book as an OK book Much of the information could already be found in the mongodborg documentations MongoDB The Definitive GuideChapter 1 Introduction The basic idea is to replace the concept of a row with a flexible model the document MongoDB was designed from the beginning to scale out Its document oriented data model allows it to automatically split up data across multiple serversFeatures a Indexing b stored Javascript c AgreggationdFixed size collectionseFile storageChapter 2 Gettting Started A document is the basic unit of data for MongoDB roughly euivalent to a row ina relational database management system but much expressive Similarly a collection can be thought of as the schema free euivalent of a table A single instance of MongoDB can host multiple independent databases each ofwhich can have its own collections and permissions MongoDB comes with a simple but powerful JavaScript shell which is useful forthe administration of MongoDB instances and data manipulation Every document has a special Key Id That Is Uniue id that is uniue the document scollection A document is an ordered set of keys with associated values Concepts on a document Keyvalue pairs in documents are ordered Values in documents are not just blobs MongoDB is type sensitive and case sensitive The shell is a full featured JavaScript interpreter capable of running arbitrary JavaScriptprograms and you can even defined JS functions The real power of the shell ies in the fact that it is also a stand alone MongoDB clientInsert post title My Blog Post content Here s my blog post date new Datedbbloginsertpost Insert in the collection blog the post object dbblogfind return all the documents in a collectionUpdateupdate takes at Write Your Novel!: Tips from a Bestseller least two parameters the first is the criteria to find which document to update and the second is the new document Detele dbblogremovetitle My Blog Post remove the document that has the title My Blog Post Help on commands A good way of figuring out what a function is doing is to type it without the parenthesesBasic data typesOn the other hand JSON s expressive capabilities areimited because the only types are null boolean numeric string array and objectIn a single collection every document must have a uniue value for id which ensures that every document in a collection can be uniuely identifiedChapter 3 Creating Updating and Deleting DocumentsBSON Binary JSON Using Modifiers 1 inc id ObjectId4b253b067525f35f94b60a31 url wwwexamplecom pageviews 52 dbanalyticsupdateurl wwwexamplecom inc pageviews 1 id ObjectId4b253b067525f35f94b60a31 url wwwexamplecom pageviews 532 setdbusersupdatename joe set favorite book green eggs and ham3 unset dbusersupdatename joe unset favorite book 1Array modifiers push adds an element to the end of an array if the specified key already exists andcreates a new array if it does not Updates by default update only the first document found that matches the criteria If there are matching documents they will remain unchan. Manage the huMONGOus amount of data collected through your web application with MongoDB This authoritative introduction written by a core contributor to the project shows you the many advantages of using document oriented databases and demonstrates how this reliable high performance system allows for almost infinite horizontal scalability This updated second edition provides guidance for database developers advanced configuration. .


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MongoDB by Kristina ChodorowIon and key dbrunCommanddistinct people key agegroup similar to group by dbrunCommandgroup ns stocks key day initial time 0 reduce functiondoc prev if doctime prevtime prevprice docprice prevtime doctime Chapter 7 Advanced Topics getLastError command to check the number of documents af fected by an updateDrop a collection dbtestdrop or dbrunCommanddrop test Capped Collections fixed in size capped collections automatically age out the oldest documents as new documents are inserted Documents cannot be removed or deleted aside from the automatic age out described earlier and updates that would cause documents to move in general updates that cause documents to grow in size are disallowed capped collections ideal for use cases ike First Year Teacher: Wit and Wisdom from Teachers Who'€ve Been There logging dbcreateCollectionmycollection capped true size 100000 max 100 dbrunCommandconvertToCapped test size 10000 converts a regular collection to a cappeddbmycollectionfindsortnatural 1 sort in reverse insertion order with a natural sortGridFS is a mechanism for storingarge binary files in MongoDB can store Javascript DBRef is an embedded document just ike any other embedded document inMongoDB A DBRef however has specific keys that must be present A simple examplelooks ike the followingref collection id idvalueChapter 8 AdministrationaddUser method is useful for than just adding new users it can be used to change a user s password or read only status Just call addUser with the username and a new password or read only setting for the userBackupmongodump d test o backupRestore from backupmongorestore d foo drop backuptestChapter 9 ReplicationMaster slave replication is the most general replication mode supported by MongoDBThis mode is very flexible and can be used for backup failover read scalingChapter 10 ShardingSharding is MongoDB s approach to scaling out Sharding allows you to add machines to handle increasing April 16th: Virginia Tech Remembers load and data size without affecting your application dbrunCommandenablesharding fooRemove a shard dbrunCommandremoveshardocalhost10000 Chapter 11 Example Applications App Chemical Search Engine in Java App News Aggregator in PHP App Custom Submission Forms in Ruby App Real Time Analytics in Python This book covers indexing uerying schema design sharding replication scalability application design and However it does not cover too much about its storage engines This is only briefly mentioned at the end of the book Still this book is comprehensive in scope and really good Overall the book is well written the two authors clearly know their stuff However I wish that they have organized the topics and wording a bit clearer and not to expect people will read the book from cover to cover MongoDB at the end of the day is a very young package So there are uirks here and there which don t necessarily make sense for people from the RDBMS paradigms Eg it probably make sense to reference Safe Operations earlier in chapter 3 because I know that there are folks out there who will drop using MongoDB mid way through chapter 3At the end of each chapter it would be good to have a summary table of that chapter Like a ist of The main concepts are well explained but as any technical book focused on a tool that evolves uickly it get out dated uickly as well The main concepts are still valid but some details have already changed sometimes significantly it is advisable to read it With The Current Documentation On The Side the current documentation on the side be aware of the differences A very detailed coverage of all MongoDB aspects development administration monitoring and performance tuning accompanied with ots of pearls of wisdom and typical gotchas It s awesome book to get a feel of MongoDB Much much better than any course on MongoDB The Mindful Living with Aspergers Syndrome last third of the book is appendices so apparently all the while I was doner than I thought I was It s a great book but it s short Ign an application that works well with MongoDB Aggregate data including counting finding distinct values grouping documents and using MapReduce Gather and interpret statistics about your collections and databases Set up replica sets and automatic failover in MongoDB Use sharding to scale horizontally andearn how it impacts applications Delve into monitoring security and authentication backuprestore and other administrative task. Ged To modify all of thedocuments matching the criteria you can pass true as the fourth parameter to update The same getLastError command that powers safe mode also containsfunctionality for checking that operations have been successfully repli cated Chapter 4 uerying1 collectionfind get all the documents from a collection2 collectionfindage 27 get all the document that have the age 273 COLLECTIONFINDAGE 27USERNAME 1 EMAIL 1 GET ALL THE collectionfindage 27username 1 email 1 get all the only the "keys username and email4 collectionfindage 27username 0 id 0 return all except username "username and email4 collectionfindage 27username 0 id 0 return all except username id uery Criteriacomparison operators t te gt gte Ex start new Date04042007 dbusersfindregistered t start show all the registered users before 04 04 2007 ne which stands for not eual dbusersfindusername ne joe show all users that aren t called joeOR ueries can be user or or in nin is the opposite of in dbcinemafindseat in 7 42 90not is used to negate a statementIf we only want to find keys whose value is null we can check that the key is null andexists using the exists conditional dbcfindz in null exists trueRegular expressions dbusersfindname joeyi Find all the users that are joey case insensitiveCursors while cursorhasNext obj cursornext execute Limits Skips and Sorts dbcfindlimit3 return only 3 results dbcfindskip3 will skip the first three matching documents and return the rest of the matches dbcfindsortusername 1 age 1 sort the results by username ascending and age descendingChapter 5 Indexing MongoDB s indexes work almost identically to typical relational data base indexes To create the index use the ensureIndex method Example if we want to index on the people dbpeopleensureIndexusername 1 If you have than one key you need to start thinking about index direction dbstatusensureIndexuser 1 date 1 uery by user and date to pull up all of a user s recent statuses Indexes can be created on keys in embedded documents in the same way that they arecreated on normal keys Uniue indexes guarantee that for a given key every document in the collection willhave a uniue value dbpeopleensureIndexusername 1 uniue true explain will return information about the indexes used for the uery if any and statsabout timing and the number of documents scanned dbpeoplefindexplain dbpeopleensureIndexusername 1 background trueBuilding indexes is time consuming and resource intensive Using the background true option builds the index in the background while handling incoming reuests Ifyou do not include the background option the database will block all other reuestswhile the index is being built you can remove it with the dropIndexes command and the index name dbrunCommanddropIndexes foo index alphabetGeospatial Indexing A geospatial index can be created using the ensureIndex function but by passing 2d as a value instead of 1 or 1 dbmapensureIndexgps 2dThe gps key must be some type of pair value that is a two element array or embeddeddocument with two keys These would all be valid gps 0 100 gps x 30 y 30 gps Space Kid latitude 180ongitude 180 For example the following code returns the 10 nearest documents to 40 73 coordinates dbmapfindgps near 40 73limit10MongoDB also allows you to find all of the documents within a shape as well as neara pointThere are two options you can uery for all points within a rectangle or a circleTo use a rectangle use the box option dbmapfindgps within box 10 20 15 30box takes a two element array the first element specifies the coordinates of thelower Circumstantial Evidence: Death, Life, and Justice in a Southern Town left corner the second element the upper rightAlso you can find all points within a circle with center which takes an array withthe center point and then a radius dbmapfindgps within center 12 25 5Chapter 6 Aggregation count dbfoocountcount the number of results for that uery dbfooinsertx 2 distinct command finds all of the distinct values for a given key You must specifya collect. For system administrators and an overview of the concepts and use cases for other people on your project Ideal for NoSL newcomers and experienced MongoDB users alike this guide provides numerous real world schema design examples Get started with MongoDB core concepts and vocabulary Perform basic write operations at differentevels of safety and speed Create complex ueries with options for imiting skipping and sorting results Des. .


10 thoughts on “(MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow

  1. says: (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Kristina Chodorow î 0 review Free read » PDF, DOC, TXT or eBook î Kristina Chodorow

    (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Download MongoDB by Kristina Chodorow The main concepts are well explained but as any technical book focused on a tool that evolves uickly it get out

  2. says: Free read » PDF, DOC, TXT or eBook î Kristina Chodorow Kristina Chodorow î 0 review (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow

    (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Kristina Chodorow î 0 review Download MongoDB by Kristina Chodorow MongoDB The Definitive GuideChapter 1 Introduction The basic idea is to replace the concept of a “row” with a flexible model the “document” MongoDB was designed from the beginning to scale out Its document oriented data model allows it to automatically split up data across multiple serversFeatures a Indexing b stored Javascript c AgreggationdFixed size collectionseFile storageChapter 2 Gettting Starte

  3. says: (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow

    (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Average book Covers only basics unnecessarily describes things easily found elsewhere like arguments of mongodump or mongo commands Often explains obvious things Recommended only for very beginners

  4. says: Download MongoDB by Kristina Chodorow Kristina Chodorow î 0 review (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow

    (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Free read » PDF, DOC, TXT or eBook î Kristina Chodorow Kristina Chodorow î 0 review A very detailed coverage of all MongoDB aspects development administration monitoring and performance tuning accompanied with lots of pearls of wisdom and typical gotchas

  5. says: (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Download MongoDB by Kristina Chodorow

    Free read » PDF, DOC, TXT or eBook î Kristina Chodorow Kristina Chodorow î 0 review (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow This book covers indexing uerying schema design sharding replication scalability application design and However it does not cover too much about its storage engines This is only briefly mentioned at the end of the book Still this book is compr

  6. says: (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow

    (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Gives a good overview on mongoDB concepts with code examples Works as a nice primer for novice and reference point for advanced techies

  7. says: (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Kristina Chodorow î 0 review

    Free read » PDF, DOC, TXT or eBook î Kristina Chodorow Kristina Chodorow î 0 review (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow It's awesome book to get a feel of MongoDB Much much better than any course on MongoDB

  8. says: (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow

    (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Free read » PDF, DOC, TXT or eBook î Kristina Chodorow Download MongoDB by Kristina Chodorow Overall the book is well written the two authors clearly know their stuff However I wish that they have organized the topics and wording a bit clearer and not to expect people will read the book from cover to cover MongoDB at the end of the day is a very young package So there are uirks here and there which don't necessa

  9. says: Download MongoDB by Kristina Chodorow Kristina Chodorow î 0 review (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow

    (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow By the title of the book that is The Definitive Guide I was hoping that the authors could point out some kind of work patterns that could be considered as a starting point for the readers to be used as their pra

  10. says: (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow Kristina Chodorow î 0 review Download MongoDB by Kristina Chodorow

    (MongoDB by Kristina Chodorow) PDF FREE ✓ Kristina Chodorow The last third of the book is appendices so apparently all the while I was doner than I thought I was It's a great book but it's short and therefore I wonder if has proper claim to the title of Definitive Guide My only complaint is that the Java chemistry app example in the last chapter is not accessible for anyone who didn't major in the physical sciences or who has been out of school for than a few years

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