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2.2 Release Notes

Upgrading What's New Major Features Aggregation Framework TTL Collections Concurrency improvements Boost 1.49 library now embedded in codebase Restrictions on Database Names Data center-aware sharding Improvements made to query optimizer Windows-specific Improvements Added Windows Service support to mongos.exe Now supporting logRotate command on Windows Added pagefault detection on Windows Tool Improvements mongodump now backs up indexes when run with --collection Added new 'mongooplog' tool for replaying oplogs Added support for authentication to mongotop and mongostat Added write concern support to mongoimport Allow mongodump from secondaries Shell Improvements Added bash command-line features to the shell Multiline commands now saved properly in shell history Enabled the Edit command in Windows shell Added 'cls' (clear screen) command to the shell Added shell helper command to load server-side functions in the shell And The Rest Added support for bulk inserts in the shell Added scons flag to use external libraries Nodes removed from a replica set now close connections No longer require _id index for capped collection update Fixed concurrency API for OpenSSL Added --syslog option for sending logs to syslog Added option to hash shard key Process ID added to serverStatus command Added ability to choose initial split points for MR on sharded collection Added localTime command Added new build using SlimReadWrite locks Improved visibility into stuck replication condition Now tracking I/O time and lock time in profiler $timestamp extended json format Allow mongoimport to import up to 16MB in BSON size No longer possible to rename a collection to an empty string Improvements to mapreduce with large objects Retry mapreduce jobs on config error Reduced file sizes required by config server Make everything work with auth Correct bug for failing queries on newly sharded collections Only sync from members that build indexes unless buildIndexes=false Abort on startup if insufficient disk space for journal files Allow specification of padding on compact command See Also Upgrading Here is how. What's New Many things. Major Features Aggregation Framework Docs MongoDB 2.2 is the first release with the aggregation framework TTL Collections Concurrency improvements DB Level Locking Improved yielding on faults Boost 1.49 library now embedded in codebase Restrictions on Database Names Database names, which are used as filenames for the backing store, can no longer contain the following characters: /\. "*<>:|? If you attempt to upgrade a database whose name contains one or more of these characters, mongod will refuse to start. Change the names of such databases before upgrading. Data center-aware sharding Improvements made to query optimizer https://jira.mongodb.org/browse/SERVER-4149 https://jira.mongodb.org/browse/SERVER-4148 Windows-specific Improvements Added Windows Service support to mongos.exe Now supporting logRotate command on Windows Added pagefault detection on Windows Tool Improvements mongodump now backs up indexes when run with --collection Added new 'mongooplog' tool for replaying oplogs Added support for authentication to mongotop and mongostat https://jira.mongodb.org/browse/SERVER-3875 https://jira.mongodb.org/browse/SERVER-3871 Added write concern support to mongoimport Allow mongodump from secondaries Shell Improvements Added bash command-line features to the shell full list: https://jira.mongodb.org/browse/SERVER-4312?focusedCommentId=95128&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-95128 Multiline commands now saved properly in shell history Enabled the Edit command in Windows shell Added 'cls' (clear screen) command to the shell Added shell helper command to load server-side functions in the shell And The Rest Added support for bulk inserts in the shell Added scons flag to use external libraries Nodes removed from a replica set now close connections No longer require _id index for capped collection update Fixed concurrency API for OpenSSL Added --syslog option for sending logs to syslog Added option to hash shard key Process ID added to serverStatus command Added ability to choose initial split points for MR on sharded collection Added localTime command Added new build using SlimReadWrite locks Improved visibility into stuck replication condition Now tracking I/O time and lock time in profiler $timestamp extended json format Allow mongoimport to import up to 16MB in BSON size No longer possible to rename a collection to an empty string Improvements to mapreduce with large objects Retry mapreduce jobs on config error Reduced file sizes required by config server Make everything work with auth Correct bug for failing queries on newly sharded collections Only sync from members that build indexes unless buildIndexes=false Abort on startup if insufficient disk space for journal files Allow specification of padding on compact command See Also Download MongoDB Full list of changes on JIRA All backward incompatible changes

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• Added by Eric Milkie, last edited by Ian Whalen on Mar 28, 2012  (view change)

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