mongodb-user@googlegroups.com discussions for February 2014

24	[mongodb-user] Disaster recovery in mongo db

Consider a replica-set environment: 1. 1 primary and secondary over WAN. 2. Both have very huge amount of data. (700 GB or so) If at primary the hardware permanently goes down, and we plug in a new ...

Db_explorer
Feb 4, 2014 at 8:10 am
Feb 10, 2014 at 1:48 pm

21	[mongodb-user] Python script to start mondod

Hello! I am writing script to start mondod instance from Python. I want to use subprocess.call from Python library. But I am not entirely clear what needs to be passed as arguments. I realize that ...

Yaroslav Kyrpych
Feb 23, 2014 at 12:27 am
Mar 13, 2014 at 6:13 pm

19	[mongodb-user] Have problem with Replica Set on Windows Azure vm

Hi there, I try to create single node replica set for MMS backup on window Azure virtual machine. When I set the configuration to create new replica set, then there are some problems in all parallel ...

Peyman Malaei
Feb 16, 2014 at 11:30 pm
Feb 20, 2014 at 11:38 pm

17	[mongodb-user] Multiple connection timeouts on Azure connecting to MongoDB server

We have a web service hosted on Windows Azure that's connecting to a MongoDB, and in our server logs we can see hundreds of connection timeouts: *"A connection attempt failed because the connected ...

Ron Rejwan
Feb 17, 2014 at 6:39 pm
Feb 21, 2014 at 5:45 pm

15	[mongodb-user] Storage requirement

I have mongodb(2.4.5) deployed in production environment on RHEL. I have 64GB of total available space for /data. My existing usage is as below: datasize: 2.5 GB storageSize: 2.9 GB fileSize: 20GB As ...

Prats
Feb 16, 2014 at 5:52 pm
Feb 20, 2014 at 6:22 pm

14	[mongodb-user] Match 2 strings in one array

Hi, is there any effective way to match 2 strings in one array and find all matching documents? Is there a way to avoid aggregation? Example [ { name: 'a', tags: ['a', 'b', 'c'] }, { name: 'b', ...

Oleg Slobodskoi
Feb 11, 2014 at 10:43 am
Feb 17, 2014 at 9:24 am

13	[mongodb-user] Query setter for mongocsharp cursor

I'm not sure if this is the place to ask this, so please let me know if it should be elsewhere (maybe jira?) The .net MongoCursor class has many properties that allow you to change the value before ...

Gareth
Feb 26, 2014 at 10:41 pm
Mar 19, 2014 at 1:47 pm

11	[mongodb-user] Sequential auto-incrementing with PyMongo and Python 3

Hello, Schema design I am working on requires sequential auto-incrementing. I know it's not advised in MongoDB. However, I need to create document with sequential key:value pairs that will be used as ...

Yaroslav Kyrpych
Feb 17, 2014 at 6:40 pm
Feb 20, 2014 at 3:54 am

11	[mongodb-user] Unreasonable memory usage?

To start, I wrote these<https://github.com/seiyria/jsmongohal/blob/master/jsmegahal.mongodb.js functions a while back, and I'm using them on my Mongo instance. I know they're probably not the best, ...

Kyle J. Kemp
Feb 11, 2014 at 10:50 pm
Feb 16, 2014 at 5:26 am

11	[mongodb-user] Map Reduce efficiency

Hi, Previously I used RavenDB, big fan. In Raven the map - reduce functions are constantly updated, so using them is as fast as querying a native collection, in mongo, I believe the map reduce is ...

Bill K
Feb 5, 2014 at 3:32 pm
Feb 7, 2014 at 11:50 pm

11	[mongodb-user] What happens if Primary goes down before oplog was transmitted

Hi all, at a mongodb session today there occured the following question: What happens if the primary member goes down _after_ writing a new dataset but _before_ the oplog was transmitted to one of ...

Tilman Beitter
Feb 7, 2014 at 2:58 am
Feb 7, 2014 at 10:23 pm

10	[mongodb-user] mongo-ruby-driver internally sort criteria and index fields

Hello As the criteria fields order matters: http://docs.mongodb.org/manual/core/index-compound/#prefixes I was wondering if could make sense to always sort the fields by key_name before creating ...

Pablo Cantero
Feb 9, 2014 at 8:22 pm
Feb 21, 2014 at 11:42 pm

10	[mongodb-user] Trying to figure out how much memory I need for my server based on this workingset.

Can anyone help me debugg this information to help me figure out the memory requirements for my DB? ueptracking_prod:SECONDARY db.runCommand ( { serverStatus: 1, workingSet: 1 } ) { "host" ...

Marcus Forness
Feb 7, 2014 at 12:02 pm
Feb 12, 2014 at 3:00 am

8	[mongodb-user] Cannot start MMS agent

I try to start an MMS agent by using "python agent.py" But get an error: Traceback (most recent call last): File "agent.py", line 8, in <module import settings as _settings File ...

Xi Chen
Feb 7, 2014 at 2:17 am
Mar 28, 2014 at 5:09 am

8	[mongodb-user] MongoDB world and me missing it, dammit

Hi, You don't know how badly I'd like to go to MongoDB world. Unfortunately, it being in NY and me being in Germany makes it impossible....well, this year it does.;-) My question, will the ...

S.molinari
Feb 23, 2014 at 8:42 am
Feb 27, 2014 at 6:20 pm

8	[mongodb-user] Pymongo tailable cursors

There's not much documentation for tailable cursors with pymongo. It looks like the general flow should be along these lines: cursor = None while True: if not cursor or not cursor.alive: cursor = ...

Glenn Maynard
Feb 9, 2014 at 5:31 pm
Feb 12, 2014 at 4:16 pm

8	[mongodb-user] How to use $unwind with empty nested documents

Hi, I have a document like below I would like to get a result document as where $unwind kind of operation returns the array elements but also includes the empty or "Notes" documents, so in effect { ...

Ramesh Reddy
Feb 9, 2014 at 6:10 pm
Feb 11, 2014 at 6:15 pm

8	[mongodb-user] Unexpected behavior and logs from mongos

Hi team, I am using MongoDB 2.2.1 in replica set configuration (6 shards, 3 replica each) ============================================================== My application (written in C) is set in cron ...

Bob
Feb 7, 2014 at 9:34 pm
Feb 11, 2014 at 4:44 am

7	[mongodb-user] Frequent Error:- com.mongodb.MongoException$Network: can't call something

Hi Team, We are frequently getting below error (please suggest how to resolve this issue):- Reason: Caused by: com.mongodb.MongoException$Network: can't call something ...

Avise Sudhakar Rao
Feb 27, 2014 at 10:25 am
Mar 5, 2014 at 9:04 pm

7	[mongodb-user] Stored procedures in mongo and db.runCommand privileges

I'm trying to create stored procedures mechanism in mongodb using system.js stored functions. But unfortunately user with "readWrite" role can't execute db.runCommand or db.eval methods. What roles ...

Kostya Remizov
Feb 27, 2014 at 10:27 am
Mar 2, 2014 at 1:35 pm

7	[mongodb-user] Is MongoDB a good fit for this requirement? Updating across collections.

I have two collections, page_view, and page_view_duration. The page_view collection has documents that look like this: { id: guid, time: timestamp, url: string } The page_view_duration collection has ...

Griffinb87
Feb 25, 2014 at 9:46 pm
Feb 26, 2014 at 10:12 pm

7	[mongodb-user] Benefits of "bucketing" data in collections

Hi, I watched the new videos on the MongoDB site about building a CMS<http://www.mongodb.com/presentations/webinar-build-application-series-session-2-getting-started . Thanks for those and I can't ...

S.molinari
Feb 23, 2014 at 6:24 am
Feb 25, 2014 at 8:05 am

7	[mongodb-user] TTL index cause high DB lock

Mongo Newbie here. It appear that after I created TTL index; mongo db lock rate shots up. Just installed MMS about a hour ago. I only want to keep the data for 4 days (60x60x24x4)=345600. Delete ...

David Wang
Feb 13, 2014 at 7:51 pm
Feb 20, 2014 at 3:55 am

7	[mongodb-user] replication status in mongodb

Consider a replica-set environment with 2 replica-set nodes(1 and 2): 1. 1 will always be primary and 2 will always be secondary. 2. 1 & 2 are connected over WAN. 3. Anyone(residing at a distinct ...

Db_explorer
Feb 4, 2014 at 11:00 am
Feb 6, 2014 at 3:12 am

6	[mongodb-user] Strange behavior in testing 2.6.0.rc0

I'm running my Sysbench application against MongoDB 2.4.9 and 2.6.0.rc0 using the exact same client application and settings. In 2.4.9 everything is running as I'd expect. However, in 2.6.0.rc0 my ...

Tim Callaghan
Feb 24, 2014 at 9:36 pm
Mar 3, 2014 at 9:13 pm

6	[mongodb-user] Scaling MongoDB for reads

I have a very small database(50-100 documents, average object size is about 1KB). This is a read heavy database. My application currently queries the database at around 20,000QPS. To spread the load ...

Ajm244
Feb 27, 2014 at 4:09 pm
Mar 3, 2014 at 8:33 am

6	[mongodb-user] Querying JSON file produced by mongoexport

Hi, i'm an internship for some weeks in a company that works with a software which uses MongoDB internally. After reading some documentation about mongoexport, my question seems to be without any ...

Benjamin D'Heure
Feb 24, 2014 at 11:40 pm
Feb 27, 2014 at 6:17 pm

6	[mongodb-user] To query oplog for timestamp using vertx

I've been trying to query the oplog for certain timestamp interval. I'm using 'io.vertx~mod-mongo-persistor~2.1.1' to get the connection and hit the db thru eventbus of Vertx. While creating the ...

Devika Pillai
Feb 19, 2014 at 9:11 am
Feb 25, 2014 at 3:38 am

6	[mongodb-user] Why secondary starts reindexing again when it is switched to primary

Hi, We did replication on brand new mongodb servers(2.4.9) from existing primary mongo server(2.0.1). Then we stepdown the primary mongo server(2.0.1). This let the new mongodb server(2.4.9) to ...

Bikash Gupta
Feb 21, 2014 at 8:12 am
Feb 24, 2014 at 1:17 pm

6	[mongodb-user] Can you create a replica set with out calling rs.reconfig()?

Hello, From my testing it appears as if when ever you try to create a replica set that uses DNS a rs.reconfig() is necessary in order for the secondaries to talk to the primary. Below is a quick ...

Terrance Shepherd
Feb 12, 2014 at 7:18 pm
Feb 14, 2014 at 6:59 pm

6	[mongodb-user] Multiple MongoDB server replicate on unique server on datacenter ?

Hi, I'm considering using mongodb on servers that will be placed in agencies (geographically separate sites). Originally I planned to use these mechanisms to replicate servers in a large datacenter ...

Guedz
Feb 11, 2014 at 10:08 am
Feb 12, 2014 at 6:51 am

6	[mongodb-user] mongo-perf not really pushing the machine

Hi, I'm trying to do some benchmarks to see if MongoDB performs equal or better on Linux versus our current FreeBSD environment. I'm currently running mongo-perf on a FreeBSD machine, quad core, 6GB ...

Michaël de Groot
Feb 5, 2014 at 9:14 pm
Feb 10, 2014 at 1:51 pm

6	[mongodb-user] Small percentage of corruption on mongoimport

Hi guys I'm currently experiencing the joys of data transfer from a single primary to another single primary. Does anyone have any experience with finding out the reason for data corruption using ...

Mark birch
Feb 9, 2014 at 2:49 pm
Feb 10, 2014 at 12:35 am

5	[mongodb-user] Use mongodump BSON files in Hive

I have exported data from MongoDB using mongodump and imported the files in HDFS. Then I am trying to use the mongo-hadoop project to read these BSON files directly in Hive. I have tried to use the ...

Mayur Gupta
Feb 19, 2014 at 2:18 pm
Jul 16, 2014 at 5:32 pm

5	[mongodb-user] mongos Balancer logs movechunk errors on non-existent collections

Hi there, I would like some help with some recent errors and sharding issues we have been seeing. (Version: 2.0.5. Setup: 3 shards, 1 primary/2 replicas each, with 3 config servers and 1 mongos) We ...

Lakshmi
Feb 4, 2014 at 12:59 am
Jul 2, 2014 at 2:45 am

5	[mongodb-user] Problem at execution of mongoDB C++ sample

Hi all, I had compile mongoDB driver with : VS2010, scons 2.3.0, mongo sources used : 2.5.5 I compile with the following options : scons --prefix=c:/mongo-client- install --full --sharedclient ...

Julien Gauthier
Feb 3, 2014 at 10:51 am
Apr 7, 2014 at 3:11 pm

5	[mongodb-user] Inserting MongoDB SubDocuments via VB.net with class List

I am real new to MongoDB (using 2.4) with vb.net 2012 (4.5) I have a class of Public Class User Public Property nickname as String 'this is unique Public Property fullname as String Public Property ...

A H
Feb 11, 2014 at 8:29 pm
Apr 5, 2014 at 5:30 pm

5	[mongodb-user] Couldn't load a valid config for collection in shard cluster

Dear all: I have shardcluster which contains 5 member, today I found on of the collection is not available in access. when I try to check the collection in mongo, i found following output. it seems ...

Percy PAN
Feb 11, 2014 at 5:41 am
Mar 23, 2014 at 5:41 am

5	[mongodb-user] Exception about mongo-hadoop reading BSON file

HI, I have tried mongo-hadoop component reading BSON file my whole today,but failed. This exception occured:*org.apache.hadoop.io.Text cannot be cast to org.bson.BSONObject.* *Here is my code ...

Lidaling1
Feb 26, 2014 at 11:13 am
Mar 19, 2014 at 7:06 pm

5	[mongodb-user] collection already sharded / collection is not sharded

Hi We have attempted to shard a large collection in mongodb 2.4.9 across 3 replica sets (rs1, rs2, rs3). At present, all data resides on rs1. We have 3 config servers running and enabled sharding ...

Dave S
Feb 24, 2014 at 6:27 am
Mar 7, 2014 at 11:02 am

5	[mongodb-user] Client choking causing OutOfMemoryError

Hi, I have a single MongoDB setup (without sharding) and multiple clients read and write from/to that Database. Out of those clients, there is one client (Read Client A) which does high number of ...

Rahul Kumar
Feb 14, 2014 at 3:20 pm
Mar 3, 2014 at 8:44 pm

5	[mongodb-user] Why Mongodb insert performance become so slow after a while

I am inserting 100 million data into Mongodb using Java API (with 50% columns are indexed, not bulk insert due to business logic). Table and index structure: db.gm_std_measurements.findOne(); { "_id" ...

Ye Huang
Feb 24, 2014 at 3:41 pm
Feb 27, 2014 at 6:36 pm

5	[mongodb-user] replica set node shutdown suddenly

System info: 1. 3.7.10-gentoo #1 SMP Mon Apr 15 23:03:37 SGT 2013 x86_64 Intel(R) Xeon(R) CPU E3-1230 V2 @ 3.30GHz GenuineIntel GNU/Linux 2. mongodb 2.4.8 3. MonogDB sharding , each shard with one ...

Amuseme
Feb 20, 2014 at 9:01 am
Feb 22, 2014 at 2:09 am

5	[mongodb-user] Maximizing throughput w/ ReadPreference

We have a sharded cluster with replica sets for each shard. We recently upgraded the memory and CPU capacity of our secondary nodes, and are now exploring the possibility of scaling reads to them, as ...

Allen
Feb 10, 2014 at 7:40 pm
Feb 20, 2014 at 6:04 pm

5	[mongodb-user] Upsert replacement document with custom _id

Hello All, I am attempting to atomically insert a document into a MongoDB collection or, if the document is already present, to replace it. Consider the following example: I have a collection of ...

Kevin Locke
Feb 12, 2014 at 5:36 pm
Feb 13, 2014 at 3:49 pm

5	[mongodb-user] [pymongo]: multiple parallel cursors without using threads or gevent

Hi everyone, I have devised an algorithm that requires me to have multiple cursors open and read from them (almost randomly) - then close those in one go. This is supposed to be a fast operation and ...

Saulius Menkevičius
Feb 10, 2014 at 4:33 pm
Feb 13, 2014 at 2:55 pm

5	[mongodb-user] Why secondary taking so much time for synchronization with primary ?

I have a replica set consisting of 1 primary, 1 secondary and 1 arbiter. Primary and arbiter are on same machine and secondary is on another machine. I configured the size of "local" database on ...

Raidon
Feb 10, 2014 at 4:31 pm
Feb 12, 2014 at 1:33 am

5	[mongodb-user] unwind of mongo object

Hi all I would like to use aggregation framework to unwind not an array but Json object ... is it possible ? I have one more question - if i have json object like this { _id : 5, attributes : { a:1 , ...

Petar Georgiev
Feb 8, 2014 at 9:11 am
Feb 9, 2014 at 11:25 pm

5	[mongodb-user] removeShard vs. sh.moveChunk()

I'm trying to understand the behavioral differences between the two, especially how aggressively (or not) removeShard operates. My understanding is that sh.moveChunk() wraps the moveChunk() command, ...

Tim Callaghan
Feb 9, 2014 at 2:38 pm
Feb 9, 2014 at 5:49 pm

5	[mongodb-user] A polite request to Asya

Hi Asya, Hope you don't mind me asking here, but would it be possible for you to link your Google+ account to your group account here, so we can see you answered, similar to how William linked his ...

S.molinari
Feb 7, 2014 at 5:49 am
Feb 9, 2014 at 10:09 am

group	mongodb-user @
categories	mongodb
discussions	242
posts	970
users	277
website	mongodb.org
irc	#mongodb

summaries	on	Hotkey: s
users list	on	Hotkey: d
user style	avatars	Hotkey: a

MongoDB > mongodb-user > February 2014

Search Discussions

242 discussions - 970 posts

277 users for February 2014

Content

People

Support

Translate