Couchbase Server

This manual documents the Couchbase Server database system. For differences between individual version within this release series, see the version-specific notes throughout the manual.

In addition to an introduction to Couchbase Server and a description of the relationship to NoSQL, this manual provides the following topics:

Couchbase Server introduction

Couchbase Server is a NoSQL document database for interactive web applications. It has a flexible data model, is easily scalable, provides consistent high performance and is ‘always-on,’ meaning it is can serve application data 24 hours, 7 days a week. Couchbase Server provides the following benefits:

  • Flexible Data Model

    With Couchbase Server, you use JSON documents to represent application objects and the relationships between objects. This document model is flexible enough so that you can change application objects without having to migrate the database schema, or plan for significant application downtime. Even the same type of object in your application can have a different data structures. For instance, you can initially represent a user name as a single document field. You can later structure a user document so that the first name and last name are separate fields in the JSON document without any downtime, and without having to update all user documents in the system.

    The other advantage in a flexible, document-based data model is that it is well suited to representing real-world items and how you want to represent them. JSON documents support nested structures, as well as field representing relationships between items which enable you to realistically represent objects in your application.

  • Easy Scalability

    It is easy to scale your application with Couchbase Server, both within a cluster of servers and between clusters at different data centers. You can add additional instances of Couchbase Server to address additional users and growth in application data without any interruptions or changes in your application code. With one click of a button, you can rapidly grow your cluster of Couchbase Servers to handle additional workload and keep data evenly distributed.

    Couchbase Server provides automatic sharding of data and rebalancing at runtime; this lets you resize your server cluster on demand. Cross-data center replication enables you to move data closer to your user at other data centers.

  • Consistent High Performance

    Couchbase Server is designed for massively concurrent data use and consistent high throughput. It provides consistent sub-millisecond response times which help ensure an enjoyable experience for users of your application. By providing consistent, high data throughput, Couchbase Server enables you to support more users with less servers. The server also automatically spreads workload across all servers to maintain consistent performance and reduce bottlenecks at any given server in a cluster.

  • “Always Online”

    Couchbase Server provides consistent sub-millisecond response times which help ensure an enjoyable experience for users of your application. By providing consistent, high data throughput, Couchbase Server enables you to support more users with less servers. The server also automatically spreads workload across all servers to maintain consistent performance and reduce bottlenecks at any given server in a cluster.

    Features such as cross-data center replication and auto-failover help ensure availability of data during server or datacenter failure.

All of these features of Couchbase Server enable development of web applications where low–latency and high throughput are required by end users. Web applications can quickly access the right information within a Couchbase cluster and developers can rapidly scale up their web applications by adding servers.

Couchbase Server and NoSQL

NoSQL databases are characterized by their ability to store data without first requiring one to define a database schema. In Couchbase Server, you can store data as key-value pairs or JSON documents. Data does not need to confirm to a rigid, pre-defined schema from the perspective of the database management system. Due to this schema-less nature, Couchbase Server supports a scale out approach to growth, increasing data and I/O capacity by adding more servers to a cluster; and without any change to application software. In contrast, relational database management systems scale up by adding more capacity including CPU, memory and disk to accommodate growth.

Relational databases store information in relations which must be defined, or modified, before data can be stored. A relation is simply a table of rows, where each row in a given relation has a fixed set of columns. These columns are consistent across each row in a relation. Tables can be further connected through cross-table references. One table, could hold rows of all individual citizens residing in a town. Another table, could have rows consisting of parent, child and relationship fields. The first two fields could be references to rows in the citizens table while the third field describes the parental relationship between the persons in the first two fields such as father or mother.

Deprecated items

The following are items that are deprecated, will be deprecated, or are unsupported.

  • The _all_docs view is not supported.

Platforms

The following operating systems were or will be deprecated.

Operating System Description/Status Deprecated version Unsupported version
Linux 32-bit operating systems (CentOS, Ubuntu, RHEL) will not be supported. 2.5.x 3.0.0
Windows 32-bit operating systems will only be supported for development purposes. 32-bit production systems will not be supported. 2.5.x 3.0.0
CentOS 5 Centos 5 will not be supported after Couchbase Server version 3.0. 3.0.0 3.0.x
Ubuntu 10.04 Ubuntu 10.04 will not be supported after Couchbase Server version 3.0.0 3.0.0 3.0.x

REST API

The following REST API URI was or will be deprecated.

REST API URI Description Deprecated version Unsupported version
Server nodes /pools/nodes URI for obtaining information about nodes in a Couchbase cluster. 3.0.0 3.0.x
  • To obtain information about nodes in a Couchbase cluster, use the ‘/pools/default/buckets/default’ URI.

CLI tools and parameters

The following are tools that existed in previous versions but have been deprecated and removed as of Couchbase Server 1.8:

Tool Server Versions Description/Status
tap.py 1.8 Deprecated in 1.8.
cbclusterstats 1.8 Deprecated in 1.8. Replaced by cbstats in 1.8.
membase 1.7 Deprecated in 1.8. Replaced by couchbase-cli in 1.8.1
mbadm-online-restore 1.7 Deprecated in 1.8. Replaced by cbadm-online-restore in 1.8.1
membase 1.7 Deprecated in 1.8, replaced by couchbase-cli
mbadm-online-restore 1.7 Deprecated in 1.8, replaced by cbadm-online-restore
mbadm-online-update 1.7 Deprecated in 1.8, replaced by cbadm-online-update
mbadm-tap-registration 1.7 Deprecated in 1.8, replaced by cbadm-tap-registration
mbbackup-incremental 1.7 Deprecated in 1.8, replaced by cbbackup-incremental
mbbackup-merge-incremental 1.7 Deprecated in 1.8, replaced by cbbackup-merge-incremental
mbbackup 1.7 Deprecated in 1.8, replaced by cbbackup
mbbrowse_logs 1.7 Deprecated in 1.8, replaced by cbbrowse_logs
mbcollect_info 1.7 Deprecated in 1.8, replaced by cbcollect_info
mbdbconvert 1.7 Deprecated in 1.8, replaced by cbdbconvert
mbdbmaint 1.7 Deprecated in 1.8, replaced by cbdbmaint
mbdbupgrade 1.7 Deprecated in 1.8, replaced by cbdbupgrade
mbdumpconfig.escript 1.7 Deprecated in 1.8, replaced by cbdumpconfig.escript
mbenable_core_dumps.sh 1.7 Deprecated in 1.8, replaced by cbenable_core_dumps.sh
mbflushctl 1.7 Deprecated in 1.8, replaced by cbflushctl
mbrestore 1.7 Deprecated in 1.8, replaced by cbrestore
mbstats 1.7 Deprecated in 1.8, replaced by cbstats
mbupgrade 1.7 Deprecated in 1.8, replaced by cbupgrade
mbvbucketctl 1.7 Deprecated in 1.8, replaced by cbvbucketctl

Deprecated parameters

The following CLI parameter is deprecated.

Tool Parameter Description Deprecated version Unsupported version
cbepctl flush_param flushall_enabled The flushall_enabled parameter is deprecated. 2.2 2.5

Unsupported CLI tools

The following are tools that are visible in Couchbase Server 2.0 installation; however the tools are unsupported. This means they are meant for Couchbase internal use and will not be supported by Couchbase Technical Support:

  • cbbrowse_logs

  • cbdump-config

  • cbenable_core_dumps.sh

  • couch_compact

  • couch_dbdump

  • couch_dbinfo

  • memslap

Licenses

This documentation and associated software is subject to the following licenses.

Documentation License

This documentation in any form, software or printed matter, contains proprietary information that is the exclusive property of Couchbase. Your access to and use of this material is subject to the terms and conditions of your Couchbase Software License and Service Agreement, which has been executed and with which you agree to comply. This document and information contained herein may not be disclosed, copied, reproduced, or distributed to anyone outside Couchbase without prior written consent of Couchbase or as specifically provided below. This document is not part of your license agreement nor can it be incorporated into any contractual agreement with Couchbase or its subsidiaries or affiliates.

Use of this documentation is subject to the following terms:

You may create a printed copy of this documentation solely for your own personal use. Conversion to other formats is allowed as long as the actual content is not altered or edited in any way. You shall not publish or distribute this documentation in any form or on any media, except if you distribute the documentation in a manner similar to how Couchbase disseminates it (that is, electronically for download on a Web site with the software) or on a CD-ROM or similar medium, provided however that the documentation is disseminated together with the software on the same medium. Any other use, such as any dissemination of printed copies or use of this documentation, in whole or in part, in another publication, requires the prior written consent from an authorized representative of Couchbase. Couchbase and/or its affiliates reserve any and all rights to this documentation not expressly granted above.

This documentation may provide access to or information on content, products, and services from third parties. Couchbase Inc. and its affiliates are not responsible for and expressly disclaim all warranties of any kind with respect to third-party content, products, and services. Couchbase Inc. and its affiliates will not be responsible for any loss, costs, or damages incurred due to your access to or use of third-party content, products, or services.

The information contained herein is subject to change without notice and is not warranted to be error free. If you find any errors, please report them to us in writing.

Couchbase, Inc. Community Edition License Agreement

IMPORTANT-READ CAREFULLY: BY CLICKING THE “I ACCEPT” BOX OR INSTALLING, DOWNLOADING OR OTHERWISE USING THIS SOFTWARE AND ANY ASSOCIATED DOCUMENTATION, YOU, ON BEHALF OF YOURSELF OR AS AN AUTHORIZED REPRESENTATIVE ON BEHALF OF AN ENTITY (“LICENSEE”) AGREE TO ALL THE TERMS OF THIS COMMUNITY EDITION LICENSE AGREEMENT (THE “AGREEMENT”) REGARDING YOUR USE OF THE SOFTWARE. YOU REPRESENT AND WARRANT THAT YOU HAVE FULL LEGAL AUTHORITY TO BIND THE LICENSEE TO THIS AGREEMENT. IF YOU DO NOT AGREE WITH ALL OF THESE TERMS, DO NOT SELECT THE “I ACCEPT” BOX AND DO NOT INSTALL, DOWNLOAD OR OTHERWISE USE THE SOFTWARE. THE EFFECTIVE DATE OF THIS AGREEMENT IS THE DATE ON WHICH YOU CLICK “I ACCEPT” OR OTHERWISE INSTALL, DOWNLOAD OR USE THE SOFTWARE.

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    As used in this Agreement, “Software” means the object code version of the applicable elastic data management server software provided by Couchbase, Inc.

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IMPORTANT-READ CAREFULLY: BY CLICKING THE “I ACCEPT” BOX OR INSTALLING, DOWNLOADING OR OTHERWISE USING THIS SOFTWARE AND ANY ASSOCIATED DOCUMENTATION, YOU, ON BEHALF OF YOURSELF OR AS AN AUTHORIZED REPRESENTATIVE ON BEHALF OF AN ENTITY (“LICENSEE”) AGREE TO ALL THE TERMS OF THIS ENTERPRISE LICENSE AGREEMENT – FREE EDITION (THE “AGREEMENT”) REGARDING YOUR USE OF THE SOFTWARE. YOU REPRESENT AND WARRANT THAT YOU HAVE FULL LEGAL AUTHORITY TO BIND THE LICENSEE TO THIS AGREEMENT. IF YOU DO NOT AGREE WITH ALL OF THESE TERMS, DO NOT SELECT THE “I ACCEPT” BOX AND DO NOT INSTALL, DOWNLOAD OR OTHERWISE USE THE SOFTWARE. THE EFFECTIVE DATE OF THIS AGREEMENT IS THE DATE ON WHICH YOU CLICK “I ACCEPT” OR OTHERWISE INSTALL, DOWNLOAD OR USE THE SOFTWARE.

  1. License Grant. Subject to Licensee’s compliance with the terms and conditions of this Agreement, Couchbase Inc. hereby grants to Licensee a perpetual, non-exclusive, non-transferable, non-sublicensable, royalty-free, limited license to install and use the Software only for Licensee’s own internal production use on up to two (2) Licensed Servers or for Licensee’s own internal non-production use for the purpose of evaluation and/or development on an unlimited number of Licensed Servers.

  2. Restrictions. Licensee will not: (a) copy or use the Software in any manner except as expressly permitted in this Agreement; (b) use or deploy the Software on any server in excess of the Licensed Servers for which Licensee has paid the applicable Subscription Fee unless it is covered by a valid license; © transfer, sell, rent, lease, lend, distribute, or sublicense the Software to any third party; (d) use the Software for providing time-sharing services, service bureau services or as part of an application services provider or as a service offering primarily designed to offer the functionality of the Software; (e) reverse engineer, disassemble, or decompile the Software (except to the extent such restrictions are prohibited by law); (f) alter, modify, enhance or prepare any derivative work from or of the Software; (g) alter or remove any proprietary notices in the Software; (h) make available to any third party the functionality of the Software or any license keys used in connection with the Software; (i) publically display or communicate the results of internal performance testing or other benchmarking or performance evaluation of the Software; or (j) export the Software in violation of U.S. Department of Commerce export administration rules or any other export laws or regulations.

  3. Proprietary Rights. The Software, and any modifications or derivatives thereto, is and shall remain the sole property of Couchbase Inc. and its licensors, and, except for the license rights granted herein, Couchbase Inc. and its licensors retain all right, title and interest in and to the Software, including all intellectual property rights therein and thereto. The Software may include third party open source software components. If Licensee is the United States Government or any contractor thereof, all licenses granted hereunder are subject to the following: (a) for acquisition by or on behalf of civil agencies, as necessary to obtain protection as “commercial computer software” and related documentation in accordance with the terms of this Agreement and as specified in Subpart 12.1212 of the Federal Acquisition Regulation (FAR), 48 C.F.R.12.1212, and its successors; and (b) for acquisition by or on behalf of the Department of Defense (DOD) and any agencies or units thereof, as necessary to obtain protection as “commercial computer software” and related documentation in accordance with the terms of this Agreement and as specified in Subparts 227.7202-1 and 227.7202-3 of the DOD FAR Supplement, 48 C.F.R.227.7202-1 and 227.7202-3, and its successors. Manufacturer is Couchbase, Inc.

  4. Support. Couchbase Inc. will provide Licensee with: (a) periodic Software updates to correct known bugs and errors to the extent Couchbase Inc. incorporates such corrections into the free edition version of the Software; and (b) access to, and use of, the Couchbase Inc. support forum available at the following URL: http://forums.membase.org. Licensee must have Licensed Servers at the same level of Support Services for all instances in a production deployment running the Software. Licensee must also have Licensed Servers at the same level of Support Services for all instances in a development and test environment running the Software, although these Support Services may be at a different level than the production Licensed Servers. Couchbase Inc. may, at its discretion, modify, suspend or terminate support at any time upon notice to Licensee.

  5. Records Retention and Audit. Licensee shall maintain complete and accurate records to permit Couchbase Inc. to verify the number of Licensed Servers used by Licensee hereunder. Upon Couchbase Inc.’s written request, Licensee shall: (a) provide Couchbase Inc. with such records within ten (10) days; and (b) will furnish Couchbase Inc. with a certification signed by an officer of Licensee verifying that the Software is being used pursuant to the terms of this Agreement. Upon at least thirty (30) days prior written notice, Couchbase Inc. may audit Licensee’s use of the Software to ensure that Licensee is in compliance with the terms of this Agreement. Any such audit will be conducted during regular business hours at Licensee’s facilities and will not unreasonably interfere with Licensee’s business activities. Licensee will provide Couchbase Inc. with access to the relevant Licensee records and facilities. If an audit reveals that Licensee has used the Software in excess of the authorized Licensed Servers, then (i) Couchbase Inc. will invoice Licensee, and Licensee will promptly pay Couchbase Inc., the applicable licensing fees for such excessive use of the Software, which fees will be based on Couchbase Inc.’s price list in effect at the time the audit is completed; and (ii) Licensee will pay Couchbase Inc.’s reasonable costs of conducting the audit.

  6. Confidentiality. Licensee and Couchbase Inc. will maintain the confidentiality of Confidential Information. The receiving party of any Confidential Information of the other party agrees not to use such Confidential Information for any purpose except as necessary to fulfill its obligations and exercise its rights under this Agreement. The receiving party shall protect the secrecy of and prevent disclosure and unauthorized use of the disclosing party’s Confidential Information using the same degree of care that it takes to protect its own confidential information and in no event shall use less than reasonable care. The terms of this Confidentiality section shall survive termination of this Agreement. Upon termination or expiration of this Agreement, the receiving party will, at the disclosing party’s option, promptly return or destroy (and provide written certification of such destruction) the disclosing party’s Confidential Information.

  7. Disclaimer of Warranty. THE SOFTWARE AND ANY SERVICES PROVIDED HEREUNDER ARE PROVIDED “AS IS” WITHOUT WARRANTY OF ANY KIND. COUCHBASE INC. DOES NOT WARRANT THAT THE SOFTWARE OR THE SERVICES PROVIDED HEREUNDER WILL MEET LICENSEE’S REQUIREMENTS, THAT THE SOFTWARE WILL OPERATE IN THE COMBINATIONS LICENSEE MAY SELECT FOR USE, THAT THE OPERATION OF THE SOFTWARE WILL BE ERROR FREE OR UNINTERRUPTED OR THAT ALL SOFTWARE ERRORS WILL BE CORRECTED. COUCHBASE INC. HEREBY DISCLAIMS ALL WARRANTIES, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, TITLE, AND ANY WARRANTIES ARISING OUT OF COURSE OF DEALING, USAGE OR TRADE.

  8. Agreement Term and Termination. The term of this Agreement shall begin on the Effective Date and will continue until terminated by the parties. Licensee may terminate this Agreement for any reason, or for no reason, by providing at least ten (10) days prior written notice to Couchbase Inc. Couchbase Inc. may terminate this Agreement if Licensee materially breaches its obligations hereunder and, where such breach is curable, such breach remains uncured for ten (10) days following written notice of the breach. Upon termination of this Agreement, Licensee will, at Couchbase Inc.’s option, promptly return or destroy (and provide written certification of such destruction) the applicable Software and all copies and portions thereof, in all forms and types of media. The following sections will survive termination or expiration of this Agreement: Sections 2, 3, 6, 7, 8, 9, 10 and 11.

  9. Limitation of Liability. TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, IN NO EVENT WILL COUCHBASE INC. OR ITS LICENSORS BE LIABLE TO LICENSEE OR TO ANY THIRD PARTY FOR ANY INDIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL OR EXEMPLARY DAMAGES OR FOR THE COST OF PROCURING SUBSTITUTE PRODUCTS OR SERVICES ARISING OUT OF OR IN ANY WAY RELATING TO OR IN CONNECTION WITH THIS AGREEMENT OR THE USE OF OR INABILITY TO USE THE SOFTWARE OR DOCUMENTATION OR THE SERVICES PROVIDED BY COUCHBASE INC. HEREUNDER INCLUDING, WITHOUT LIMITATION, DAMAGES OR OTHER LOSSES FOR LOSS OF USE, LOSS OF BUSINESS, LOSS OF GOODWILL, WORK STOPPAGE, LOST PROFITS, LOSS OF DATA, COMPUTER FAILURE OR ANY AND ALL OTHER COMMERCIAL DAMAGES OR LOSSES EVEN IF ADVISED OF THE POSSIBILITY THEREOF AND REGARDLESS OF THE LEGAL OR EQUITABLE THEORY (CONTRACT, TORT OR OTHERWISE) UPON WHICH THE CLAIM IS BASED. IN NO EVENT WILL COUCHBASE INC.’S OR ITS LICENSORS' AGGREGATE LIABILITY TO LICENSEE, FROM ALL CAUSES OF ACTION AND UNDER ALL THEORIES OF LIABILITY, EXCEED ONE THOUSAND DOLLARS (US $1,000). The parties expressly acknowledge and agree that Couchbase Inc. has set its prices and entered into this Agreement in reliance upon the limitations of liability specified herein, which allocate the risk between Couchbase Inc. and Licensee and form a basis of the bargain between the parties.

  10. General. Couchbase Inc. shall not be liable for any delay or failure in performance due to causes beyond its reasonable control. Neither party will, without the other party’s prior written consent, make any news release, public announcement, denial or confirmation of this Agreement, its value, or its terms and conditions, or in any manner advertise or publish the fact of this Agreement. Notwithstanding the above, Couchbase Inc. may use Licensee’s name and logo, consistent with Licensee’s trademark policies, on customer lists so long as such use in no way promotes either endorsement or approval of Couchbase Inc. or any Couchbase Inc. products or services. Licensee may not assign this Agreement, in whole or in part, by operation of law or otherwise, without Couchbase Inc.’s prior written consent. Any attempt to assign this Agreement, without such consent, will be null and of no effect. Subject to the foregoing, this Agreement will bind and inure to the benefit of each party’s successors and permitted assigns. If for any reason a court of competent jurisdiction finds any provision of this Agreement invalid or unenforceable, that provision of the Agreement will be enforced to the maximum extent permissible and the other provisions of this Agreement will remain in full force and effect. The failure by either party to enforce any provision of this Agreement will not constitute a waiver of future enforcement of that or any other provision. All waivers must be in writing and signed by both parties. All notices permitted or required under this Agreement shall be in writing and shall be delivered in person, by confirmed facsimile, overnight courier service or mailed by first class, registered or certified mail, postage prepaid, to the address of the party specified above or such other address as either party may specify in writing. Such notice shall be deemed to have been given upon receipt. This Agreement shall be governed by the laws of the State of California, U.S.A., excluding its conflicts of law rules. The parties expressly agree that the UN Convention for the International Sale of Goods (CISG) will not apply. Any legal action or proceeding arising under this Agreement will be brought exclusively in the federal or state courts located in the Northern District of California and the parties hereby irrevocably consent to the personal jurisdiction and venue therein. Any amendment or modification to the Agreement must be in writing signed by both parties. This Agreement constitutes the entire agreement and supersedes all prior or contemporaneous oral or written agreements regarding the subject matter hereof. To the extent there is a conflict between this Agreement and the terms of any “shrinkwrap” or “clickwrap” license included in any package, media, or electronic version of Couchbase Inc.-furnished software, the terms and conditions of this Agreement will control. Each of the parties has caused this Agreement to be executed by its duly authorized representatives as of the Effective Date. Except as expressly set forth in this Agreement, the exercise by either party of any of its remedies under this Agreement will be without prejudice to its other remedies under this Agreement or otherwise. The parties to this Agreement are independent contractors and this Agreement will not establish any relationship of partnership, joint venture, employment, franchise, or agency between the parties. Neither party will have the power to bind the other or incur obligations on the other’s behalf without the other’s prior written consent.

  11. Definitions. Capitalized terms used herein shall have the following definitions: “Confidential Information” means any proprietary information received by the other party during, or prior to entering into, this Agreement that a party should know is confidential or proprietary based on the circumstances surrounding the disclosure including, without limitation, the Software and any non-public technical and business information. Confidential Information does not include information that (a) is or becomes generally known to the public through no fault of or breach of this Agreement by the receiving party; (b) is rightfully known by the receiving party at the time of disclosure without an obligation of confidentiality; © is independently developed by the receiving party without use of the disclosing party’s Confidential Information; or (d) the receiving party rightfully obtains from a third party without restriction on use or disclosure. “Documentation” means any technical user guides or manuals provided by Couchbase Inc. related to the Software. “Licensed Server” means an instance of the Software running on one (1) operating system. Each operating system instance may be running directly on physical hardware, in a virtual machine, or on a cloud server. “Couchbase” means Couchbase, Inc. “Couchbase Website” means www.couchbase.com. “Software” means the object code version of the applicable elastic data management server software provided by Couchbase Inc. and ordered by Licensee during the ordering process on the Couchbase Website.

If you have any questions regarding this Agreement, please contact sales@couchbase.com.