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SNIA Cloud Storage Presentation
1.
SNIA Cloud Storage
PRESENTATION TITLE GOES HERE Cloud Computing Summit OMG Standards in Government and NGO Workshop Cloud Storage TWG
2.
Cloud Storage TWG SNIA
Cloud Storage TWG Launched April 2009 116 Technical Work Group members (43 active) Google group for broader community (198 members): http://groups.google.com/group/snia-cloud Published first documents June 2009 Use Cases/Requirements, Reference Model Public web page http://snia.org/cloud Working on Cloud Data Management Interface Targeted at ANSI and ISO certification Starting up a Cloud Storage Initiative Promote Cloud Storage and Standards Copyright © 2009 Storage Networking Industry Association 2
3.
Cloud Storage TWG Participating*
Companies & Academia ActiFio Hitachi Olocity Brocade • HP • Oracle • Bycast • Huawei • Patni • Calsoft • IBM • PMC-Sierra • Cisco • Intel • Qlogic • Data Mobility • Intellium • Quantum Group • Int’l Microsystems • Royer Systems • Dell • Kerstor • UCSD • Dimension Data • Knowledge • UCSC • EMC Transfer • Seagate • Emulex • LB-Systems • Sun • ETRI Messgaerate • Symantec • FourColour IT GmbH • Tata Consultancy • Fujitsu • LSI • VMWare • Hamburg University • Microsoft • Wipro of Technology • Mindtree • Xyratex • HCL Technologies • NEC • HDS NetApp Copyright © 2009 Storage Networking Industry Association • * Based on TWG Roster 3
4.
Cloud Storage TWG Some
Customer Scenarios Escalating Amount of Data, becoming more expensive to manage Is that old data valuable still? Meet governance needs Who is in charge of deleting old data, finding it again? New projects with a desire not to have isolated local storage Do they already go around existing storage practices? Storage of important data How do you make sure it’s requirements are being met? Storage for new Cloud Computing projects Where does the data live long term? Copyright © 2009 Storage Networking Industry Association 4
5.
Cloud Storage TWG Overview
When discussing cloud storage and standards, it is important to distinguish the various resources that are being offered as services. These resources are exposed to clients as Functional interfaces (Data Path) and are managed by Management interfaces (Control Path). We explore the various types of interfaces that are part of offerings today and show how they are related. We propose a model for the interfaces that can be mapped to the various offerings as well as form the basis for rich cloud storage interfaces into the future. Copyright © 2009 Storage Networking Industry Association 5
6.
Cloud Storage TWG Introduction
Another important concept explored in this paper is that of MetaData. When managing large amounts of data with differing requirements. Metadata is a convenient mechanism to express those requirements in such a way that underlying data services can differentiate their treatment of the data to meet those requirements. The appeal of cloud storage is due to some of the same attributes that define other cloud services: pay as you go, the illusion of infinite capacity (elasticity), and the simplicity of use/management. It is therefore important that any interface for cloud storage support these attributes, while allowing for a multitude of business cases and offerings, long into the future. Copyright © 2009 Storage Networking Industry Association 6
7.
Cloud Storage TWG What
is Cloud Storage? The use of the term cloud in describing these new models arose from architecture drawings that typically used a cloud as the dominant networking icon. The cloud conceptually represented any to any connectivity in a network, but also an abstraction of concerns such the actual connectivity and the services running in the network that accomplish that connectivity with little manual intervention. Copyright © 2009 Storage Networking Industry Association 7
8.
Cloud Storage TWG Cloud
Storage Defined This abstraction of complexity and promotion of simplicity is what primarily constitutes a cloud of resources, regardless of type. An important part of the cloud model in general is the concept of a pool of resources that is drawn from upon demand in small increments (smaller than what you would typically purchase by buying equipment). The recent innovation that has made this possible is virtualization. Thus cloud storage is simply the delivery of virtualized storage on demand. The formal term we proposed for this is Data Storage as a Service (DaaS). Data Storage as a Service Delivery of virtualized storage on demand. Copyright © 2009 Storage Networking Industry Association 8
9.
Cloud Storage TWG Some
use cases Offerings in the Data Storage as a Service space are increasing in capabilities Additional service levels beyond “Best Effort” storage Local appliances that “wrap” cloud storage for legacy applications Cloud Storage offerings that layer onto best effort services These offerings go beyond merely storing the data, and start to account for data with differing requirements There is a danger that the resulting complexity may cause the simplicity of cloud storage to be lost There is an increasing “exit cost” to move from one vendor to another Copyright © 2009 Storage Networking Industry Association 9
10.
Cloud Storage TWG A
look at some existing Cloud APIs What are some of the offerings and their Data Storage Interfaces? Copyright © 2009 Storage Networking Industry Association 10
11.
Leveraging the Storage
Cloud Storage TWG Industry Resource Domain Model All of these interfaces support some or all of this model. The key to retaining the simplicity of the cloud, however, is in the use of metadata to drive the underlying services so that users need not manage the services themselves. Copyright © 2009 Storage Networking Industry Association 11
12.
Cloud Storage TWG Cloud
Storage Container • Cloud Storage is used as a volume/filesystem • DSI Protocols include: WebDAV, NFS, CIFS, iSCSI, OSD • Management interfaces: proprietary, Web UI, SMI-S • Billing based on allocated space, Data Requirement (DR) parameters • Resource guarantee (desired and required), consumption • Configuration of DR is an object oriented hierarchy from containers on down to individual data elements Copyright © 2009 Storage Networking Industry Association 12
13.
Cloud Storage TWG Container
DSI Typically already standardized Needs support for metadata Need for standardization: Standard Data System Metadata to be interpreted by the cloud as Data Requirements Broad categories of Data Requirements Retention Initial Security, Performance and Availability Requirements Lifecycle – Defined Epochs with Requirements for each, Defined state transitions Security Classification Requirement may be expressed as minimum and desired Location Geography (political boundaries) – specific local requirements Network Topology (bandwidth, latency to specific clients - Affinity to specific resources) Budget History and Versioning metadata Copyright © 2009 Storage Networking Industry Association 13
14.
Cloud Storage TWG Container
Management Management Aspects For iSCSI (for example) the “Container” could be equivalent to a Target, the LUNs would inherit (support a hierarchy of Containers) the Target’s requirements, but could be overridden Allocation of Storage Size (Initial. May be thin provisioned. May be grow-able) Default Data Requirements (DR) expressed in the same schema as the file metadata ACLs for the container as a whole as well Requirements may be drawn from an existing set of templates – Price per GB (hint) of capacity allocated at this requirement Price per GB (hint) of access (R vs. W) at this requirement Timing aspects of the allocation – perhaps a “job” submittal – Characteristics and capabilities on each requirement (knob “stops”) Maximums (i.e. number of objects) Monitoring of Storage – Aggregate Consumed Bandwidth Used – per Type Reporting of “performance” against requirements – Based on connections to other elements Container capability ranges for each requirement Aggregate across containers Copyright © 2009 Storage Networking Industry Association 14
15.
Cloud Storage TWG Storage
Cloud • Cloud storage is un- provisioned • DSI interface: RESTful, HTTP, S3, XAM Management interfaces: proprietary, Web UI, Data System Metadata Soft definition of “container” and sub- containers (perhaps through a query expression) Copyright © 2009 Storage Networking Industry Association 15
16.
Cloud Storage TWG Cloud
DSI • Need to standardize existing proprietary interfaces • Needs support for metadata Need for standardization: – Standard Data System Metadata to be interpreted by the cloud as Data Requirements Copyright © 2009 Storage Networking Industry Association 16
17.
Cloud Storage TWG Cloud
Table Storage • Tables are created in the cloud • Horizontally scalable “database” Query capability DSI protocols: proprietary • Management protocols: Proprietary, Web UI Data Requirements may need to be expressed on a column or row basis Copyright © 2009 Storage Networking Industry Association 17
18.
Cloud Storage TWG Cloud
Table DSI • Need to standardize existing proprietary interfaces? – This interface is rapidly evolving, so the actual standard I/F is low priority, but encouraging support for metadata can be done separately Needs support for metadata Container, Table, Row/Column • Need for standardization: Standard Data System Metadata to be interpreted by the cloud as Data Requirements Copyright © 2009 Storage Networking Industry Association 18
19.
Cloud Storage TWG The
Complete Picture Copyright © 2009 Storage Networking Industry Association 19
20.
Cloud Storage TWG Cloud
Data Management Interface • Apply these to the “management interface” as well as the Data Interface” • Semantics Look to XAM, SMI-S for semantics – subset, extend where needed Map-able where possible to other interfaces such as XAM, SMI-S, POSIX • Protocols RESTful HTTP as “core” interface style (violate where needed) JSON vs. XML – format of the representations need to be extensible – We will define these representations for interoperability Language Bindings, Client Libraries Standardize protocol, provide a few libraries, then only standardize the APIs and language bindings if needed • Reference Implementation, Example Clients Copyright © 2009 Storage Networking Industry Association 20
21.
Cloud Storage TWG Model
for the Interface The resources which are accessed through the RESTful interface Copyright © 2009 Storage Networking Industry Association 21
22.
Cloud Storage TWG The
Big Picture Copyright © 2009 Storage Networking Industry Association 22
23.
High Level Cloud
TWG Cloud Storage TWG Roadmap • Taxonomy – submit terms for SNIA Dictionary (done) • Use cases – first draft June 2009 Submit to TC for public review of work in progress Reference Model (RM) – first draft June 2009 – Submit to TC for public review of work in progress SNIA Cloud Data Management Interface (CDMI) – first draft SDC 09 Major Crafting at July Symposium • Significant finishing at August Symposium Need an editor on board soon! Reference Implementation (RI) – first work in progress release December ‘09 – Pickup HTTP VIM and Ref VIM from XAM and Implement Draft CDM Q1/2010 Update on CDMI, RI, Use Cases and RM Copyright © 2009 Storage Networking Industry Association 23