The Symmetrix DMX Architecture

Symmetrix DMX delivers more performance, higher availability, and more functionality.The direct matrix design of Symmetrix DMX represents a significant improvement over switch and bus-based architectures.Similarly, the Symmetrix Direct Matrix Architecture delivers direct access from the front of the storage array to the back, guaranteeing the highest possible I/O throughput. There is no possibility of delay at a bus or switch or hub. Data flow is unimpeded.

Symmetrix DMX Architecture core components are: Channel Directors (front end director) for host communication; each card have up to 4 portsGlobal Memory Directors (Symmetrix cache memory) for I/O delivery from hosts to Disk Directors, and is divided into regions.Disk Directors (back end director) for disk communication; have 4 interfaces [C, D, E, and F] or can handle 7 SCSI ids [0-6] Disk Drives.

Symmetrix hardwareThe shared-model design means that all directors (channel and disk) are autonomous and work in parallel. It also means that each director, with up to eight PowerPC processors, can access all regions in the Global Memory Directors.Because access to the global memory resources in the system is symmetrical, any processor on a director can participate in any event within the system. Examples of such events include (but are not limited to) I/O READS and WRITES, error detection and correction, and creation of remote and local copies of data. The directors can also provide resilience if a fault occurs in another specified director. This “shared everything” design is a key to delivering consistently high service levels for performance, availability, and functionality.The Global Memory Director manages 32 independent global memory regions. The Direct Matrix Interconnect is a matrix of dedicated high-speed links to all of the system components, providing unparalleled internal aggregate bandwidth of up to 64GB/sec.

Symmetrix SoftwareAlthough the “shared everything” hardware design allows all components to share the workload, it is the Enginuity storage operating environment that provides intelligence to Symmetrix systems.Enginuity is an event-driven storage operating environment that prioritizes multiple simultaneous events within the system and guarantees quality of service (QoS) for the most important events. For example, Enginuity ensures that correcting a two-bit error in memory

takes priority over a WRITE request; a READ request takes priority over updating a business continuance volume (BCV), and so on.Enginuity also delivers performance, data integrity, and open integration for the Symmetrix family of storage arrays.The combination of the Symmetrix multi-processing hardware architecture with the event-driven Enginuity storage operating environment produces a massively parallel storage system designed to multi-task numerous simultaneous events.

EMC Symmetrix Enginuity Operating EnvironmentEnginuity is an event-driven storage operating environment that prioritizes multiple simultaneous events within the system and guarantees quality of service (QoS) for the most important events.This code sits on the Service Processor but also gets loaded on all the Directors during installation and upgrades. On these Directors is also loaded the BIN FILE (Configuration of the Symmetrix) along with the Emulation code. The initial Enginuity code load and BIN FILE setup is performed when the customer first purchases the machine and is customized based on their SAN environment.Enginuity Code level [based on the Family of machines]

Enginuity Code LevelSymmetrix Version Models37XX Symmetrix 2.5 4200, 4400, 480050xx Symmetrix 3.0 3100/5100, 3200/5200, 3500/55005265/66/67 Symmetrix 4.0 & 4.83330/5300, 3400/5430, 3700/5700 & 3630/5630, 3830/5830,

3930/59305567/68 Symmetrix 5.0 & 5.55669/70/71 Symmetrix DMX1 & 2DMX-800, 1000, 2000, 30005771/72/73 Symmetrix DMX3 & 45874 Symmetrix V-MAX V-MAX, V-MAX SE (Single Engine)

The guidelines for Enginuity Code level is as follows.Example 5671.75.75 First Two digits represent Symmetrix Versions56 = DMX1/DMX2The next two digits represent Microcode Family & Major Symmetrix Release.71 = Microcode Family, Major Symmetrix-DMX Releases for DMX1/DMX2The next two digits areEmulation Number designated as EE The last two digits areField Release level Service Processor Code Level (Symmetrix win Version)Note:-The version of the Enginuity code will define what functionality and features the Symmetrix / DMX will have for that generation. As the hardware gets better and faster, the Enginuity Code has to improve and add features to perform along with it. Note: The multi-protocol channel director and support for FICON, iSCSI and GigE channel connections require Enginuity level 5670 and higher.

EMC Symmetrix File System (SFS)Symmetrix File System is an EMC IP and practically only used within the Symmetrix environment for housekeeping, security, access control, stats collection, performance data, algorithm selection, etc.Symmetrix File System (SFS) resides on volumes that have specially been created for this purpose on the SymmetrixSFS volumes are created during the initial Enginuity Operating Environment load (Initial install)4 Volumes (2 Mirrored Pairs) are created during this processSFS volumes were introduced with Symmetrix Series 8000, Enginuity 5567 and 5568SFS Characteristics-

SFS volumes are reserved space, 4 SFS volumes are spread across multiple Disk Directors (Backend Ports) for redundancy & cannot be mapped to Fiber Directors (now FE – Front-end Ports)Symmetrix 8000/DMX/DMX-2 Series: 4 SFS vol X 3GB each (6140CY) = 12 GBSymmetrix DMX-3/DMX-4: 4 SFS vol X 6GB each (6140CY) = 24 GBSymmetrix V-Max: 4 SFS vol X 16GB each = 64 GBSFS vol can’t reside on EFD (Enterprise Flash Drives)/Vault Drives/Save VolSFS volumes cannot be moved using FAST v1 and/or FAST v2/Sym OptimizerSFS vol are specific to a Symmetrix (Serial Number) and don’t need migrationSymmetrix Component-Level ServiceabilitySymmetrix DMX provides full component-level redundancy to ensure continuous and uninterrupted access to information.The design allows concurrent maintenance of all major components, including:• Global Memory Director• Channel Director• Disk Director• Disk devices• Cooling fan modules• Environmental Control Module‘Communication Control Module• Power supplies• Batteries• Service processorTo improve serviceability, the Symmetrix DMX directors are mechanically keyed to prevent insertion to invalid slots.

Symmetrix Data Protection OptionsSymmetrix data protection options ensure uninterrupted access to data in the event of a disk failure. The options listed below can be purchased separately and implemented into the Symmetrix operation.

Symmetrix DMX Mirrored and Parity RAID Options

Symmetrix Parity RAID technology is a combination of hardware and software functionality that improves data availability on drives by using a portion of the array to store redundancy information. This redundancy information, called parity, can be used to regenerate data if a disk drive becomes unavailable.

Disk mirroring conceptsMirroring maintains a duplicate copy of a logical volume on two physical disk devices. The Symmetrix system maintains these copies internally by writing all modified data to both devices.Parity RAID (3+1) - A Parity RAID (3+1) configuration consists of Parity Raid Ranks containing three data volumes and one parity volume. With this approach, effectively 75 percent of the total storage capacity of each Parity RAID group is available for storing data.Parity RAID (7+1) - A Parity RAID (+i) configuration consists of Parity Raid Ranks containing seven data volumes and one parity volume. With this approach, effectively 87.5 percent of the total storage capacity of each Parity RAID group is available for storing data.Notes: Multiple Symmetrix RAID groups with one configuration can coexist on the same Symmetrix unit. Symmetrix RAID (3+1) groups and RAID (+i) groups cannot be configured in the same Symmetrix system although each can be configured together with mirrored volumes. All logical volumes participating in a Symmetrix RAID group must have identical storage capacity. A Symmetrix system allows intermixing of different capacity physical disk devices within a single Symmetrix unit.RAID 5 (3+1) - A RAID 5(3+1) configuration consists of four Symmetrix devices with data and parity striped across each device. With this approach effectively of the total capacity of a RAID 5 device is available for storing data.RAID 5 (7+1)- A RAID (3+1) configuration consists of eight Symmetrix devices with data and parity striped across each device. With this approach effectively of the total capacity of a RAID device is available for storing data.

EMC PowerPathChannel failover functionality is required to automate failover and failback processes to avoid interruptions to data access. Without this functionality, a path failure due to a problem with the host bus adapter, Fibre Channel switch, fibre cable, or Channel Director would create the potential for the application to go down.EMC PowerPath provides this functionality. It automatically detects when a path has failed and notifies the host that there is an inactive path. PowerPath then fails over the existing I/O request to another active path to maintain data access and application availability.Once the failed path is fixed or repaired, PowerPath automatically detects that the path has become active, brings the path back into operation, and automatically starts sending I/O requests down the now active path.PowerPath also provides intelligent load balancing to optimize performance and minimize bottlenecks. All this occurs transparently to the host so the application is not stopped and data is continuously available.

EMC Business Continuance SoftwareThe TimeFinder and SRDF families of local and remote replication solutions deliver the most comprehensive and robust suite of replication solutions available.TimeFinderTimeFinder is a family of EMC replication products that operate in a single Symmetrix array and non-disruptively create and manage point-in-time copies of data volumes. TimeFinder runs in Symmetrix Enginuity but is controlled by TimeFinder software running on an attached host. It can be administered by the user through Solutions Enabler Command Line Interface, Symmetrix Management Console (SMC), EMC Control Center (ECC) or Mainframe Enablers. TimeFinder includes the following sets of products:TimeFinder/MirrorTimeFinder/Mirror is the original TimeFinder product that has been in existence for about 12 years. It provides full copies of source volumes through a technique of hardware mirroring.

The target volume for a TimeFinder/Mirror process is a Business Continuance Volume (BCV); a specially designated volume within the Symmetrix configuration. When a BCV is fully synchronized with a data device, the BCV is separated or split, and made available to a host for backup or other host processes.TimeFinder/CloneTimeFinder/Clone provides single or multiple point-in-time copies of full volumes or individual datasets. Cloned data is available to a host immediately upon activation, even if the copy process has not completed.TimeFinder/SnapTimeFinder/Snap provides pointer-only based replicas simultaneously on multiple target devices from a single source device. With a space saving TimeFinder/Snap only changed data is written to a pool of save devices. Data reconstruction is from the source device and the pointers into the change tracking save pool. Data may be copied from a single source device to as many as 128 target virtual devices.TimeFinder Consistency GroupsTimeFinder Consistency Groups is a flow control mechanism that is employed to create copies of source volumes at an instanteous point in time. TF/CG utilizes an Enginuity feature call ECA (Enginuity Consistency Assist) to momentarily halt writes to source volumes during the creation of the copy.

Symmetrix Remote Data Facility/Synchronous (SRDF/S) and SRDF/Asynchronous (SRDF/A) provide mirroring between Symmetrix arrays, which may be a few meters or thousands of miles apart. By maintaining data at a second site, SRDF/S and SRDF/A facilities provide rapid business resumption in case of disaster or data center relocation. Traditional data recovery tasks, such as tape restore and database recovery, which are Labor-intensive, error-prone, and extremely time-consuming, are eliminated.SRDF/S and SRDF/A are host (server), operating system, file system, and database independent. They represent the only solutions of their kind that work simultaneously with mainframe, UNIX, Windows, and Celerra systems.

Alternative solutions for Long-distance replicationSome IT organizations are reluctant to implement SRDF/S over long distances because extended distance raises two concerns:1] Synchronous remote mirrors will inevitably cause a performance problem for any reasonably active update application.2] Even if response time is not an issue, the cost of a long-distance, high-bandwidth communications facility may be too great to make the implementation feasible.Among the long-distance replication solutions available to Symmetrix users are:

a. Symmetrix Remote Data Facility/Asynchronous (SRDF/A) andb. Symmetrix Remote Data Facility/Automated Replication (SRDF/AR).

Symmetrix Remote Data Facility/Asynchronous (SRDF/A), designed for both open systems and mainframe environments, is intended for use over greater distances than are feasible with synchronous replication technologies. It delivers a consistent and restartable remote copy of production data at all times, over any distance, with no host application impact, while minimizing bandwidth requirements. SRDF/A is able to accomplish this because of EMC’s patented Delta Set architecture. Delta Sets are global-memory-resident collections of WRITES that have occurred within a specific period of time. Bandwidth is conserved because Delta Sets allow data to be re-written, and only the final set of updates is sent over the communications link to the remote site. In addition, SRDF/A allows the administrator to size communications links to the average WRITE workload rather than the peak workload.

Symmetrix Remote Data Facility/Automated Replication (SRDF/AR) optionSymmetrix, combined with its industry-leading SRDF/S and TimeFinder/Mirror software along with optional SRDF/AR software, allows users to implement automated regional failover combined with long distance replication with no data exposure while:• Masking the effects of distance with respect to performance• Minimizing communication costs• Facilitating rapid restart of applications at the recovery site with no data lossSRDF/AR can be configured in a single-hop or multi-hop Configuration. Single-hop uses two Symmetrix systems with SRDF/S and SRDF/AR along with TimeFinder/Mirror and automates the cycling of TimeFinder/Mirror BCVs or the Sources side and sends the scheduled updates to the Target system.Multi-hop is implemented by placing by an additional Symmetrix array, with TimeFinder/Mirror, between the source and target Symmetrix arrays. (Servers are not required at this intermediate site.) In this way, long-distance, high-capacity bandwidth is replaced with short-distance, low-capacity, inexpensive bandwidth.SRDF/AR Multi-hop works as follows:• SRDF/S maintains data synchronization between the production site and the intermediate site. A TimeFinder/Mirror BCV is established to the target volume in the intermediate Symmetrix.• At regular intervals, the BCV is split from its source, and in turn becomes a source volume, synchronizing with a target volume in the recovery site. This synchronization is incremental, so the bandwidth requirements between the intermediate site and the recovery site are far less than would be required in a non-buffered implementation. Once synchronized, SRDF/S or SRDF/DM is suspended between the intermediate and recovery sites.• The BCV is reestablished to its source volume, and is incrementally resynchronized with updates that occurred while the BCV was synchronizing to the recovery site.The entire process repeats in an automated fashion by SRDF/AR on an established schedule. The SRDF/AR capability makes this implementation very easy.Symmetrix Remote Data Facility/Data Mobility (SRDF/DM) uses an Adaptive Copy mode to provide data mobility and/or migration between two or more Symmetrix systems. SRDF/DM is ideal for data exchanges and content distribution. Adaptive Copy mode enables applications using that volume to avoid propagation delays while data is transferred to the remote site. SRDF/DM supports all Symmetrix systems and all microcode levels that support SRDF, and can be used for local or remote transfers.Note: Unlike full-function SRDF/S, SRDF/DM is not intended for disaster recovery.

SRDF/Consistency Group (SRDF/CG) is a software option designed to ensure the consistency of data participating in an SRDF family session. Most applications, and in particular database management systems, have dependent WRITE logic embedded in them to ensure data integrity if a host processor, software, or storage subsystem fails. An example is a database update. When a DBMS updates a database, it first writes to the disk containing the log, then to the actual database dataset, and finally to the log volume to indicate that the update was made. The three WRITE I/Os (log, database, log again) are related, and each I/O is not issued until the prior I/O has been successfully completed.

In a remote disk copy environment, data consistency cannot be ensured if one of these I/Os was remotely mirrored, but its predecessor was not. This could occur, for example, in a rolling disaster, where a communication loss affects only a subset of the disk controllers that are performing the remote copy function. EMC’s SRDF/Consistency Group option prevents this from happening, by intercepting any I/O to a volume that cannot communicate to its remote mirror. It then suspends the remote mirroring for all volumes defined in the consistency group before completing the intercepted I/O and returning control to the application. By preventing independent I/O from being issued by the application, a consistency group implementation ensures the integrity and consistency of the data at the remote site.

EMC’s ControlCenterEMC’s ControlCenter family of products automates the monitoring, reporting, and control of a networked storage infrastructure, with an emphasis on managing resources, networks, and devices.

EMC resource management products include:• Automated Resource Manager: for simplified, automated provisioning and alert management, and consolidation of storage resource operations• StorageScope: for enterprise-wide storage utilization reporting and planning• WorkloadAnalyzer: for server, SAN, and storage performance analysis• Database Tuner: for performance reporting on Oracle, UDB, and Microsoft SQL databases

EMC device management products include:• Navisphere: for monitoring, provisioning, and reporting on CLARiiON storage arrays• Common Array Manager: for monitoring and reporting on third-party storage arrays• Symmetrix Manager: for monitoring, provisioning, and reporting on Symmetrix storage platforms• Symmetrix Optimizer: for automatic optimization of volume performance on SymmetrixInformation SafetyRecovery Management & Replication Management: The software products in these two groups are used for information recovery or information replication, depending upon how they are deployed. These products include:• EMC Data Manager (EDM): for automating enterprise-wide backup and recovery for open systems• Replication Manager: for automating the management and scheduling of TimeFinder, SnapView, and third-party data replication products• Symmetrix Data Mobility Manager: for automating the scheduling and use of remote and local information replication• SRDF/TimeFinder Manager: for monitoring and controlling local and remote Symmetrix mirrors through the ControlCenter console

Access Optimization is achieved with intelligent multi-pathing tools providing automatic network optimization as business needs and utilization change.Access optimization products include:• GeoSpan: for integrated, automated networked storage support for clusters• Celerra HighRoad: for optimized delivery of files across SAN and NAS networked storage• PowerPath: for dynamic multi-channel path optimization

StorageScope is a correlated storage utilization reporter.With StorageScope, we can customize utilization metrics to track and account for your storage assets any way you need to report on more IT assets.Identify underutilized or inefficient utilization of storage assets.Facilitate billing or charge-back operations by application or line of business.Capacity plan across entire infrastructure to avoid "out of space" errors.Summarize multi-vendor storage infrastructure in application and business context.Track historical metrics to predict growth and plan future procurements.

Report on across hosts, switches, arrays, NAS devices, databasesSupport for SAN, NAS, and JBOD, server-attached multi-vendor storage reporting on table-space metrics for Oracle Data-file information for Oracle, SQL Server, Sybase, Informix, and UDB

Virtual ProvisioningVirtual Provisioning is EMC’s implementation of thin provisioning. Virtual Provisioning allows users to create large “thin” volumes and present them to the host while consuming physical storage from a shared pool only as needed.Symmetrix Virtual Provisioning introduces a new type of host accessible device called a thin device that can be used in many of the same ways that regular, host accessible Symmetrix devices have traditionally been used. Unlike regular Symmetrix devices, thin devices do not need to have physical storage completely allocated at the time the devices are created and presented to a host. The physical storage that is used to supply drive space for a thin device comes from a shared thin storage pool that has been associated with the thin device.A thin storage pool is composed of a new type of internal Symmetrix device called a data device that is dedicated to the purpose of providing the actual physical storage used by thin devices.When a write is performed to a portion of the thin device, the Symmetrix allocates a minimum allotment of physical storage from the pool and maps that storage to a region of the thin device including the area targeted by the write. The storage allocation operations are performed in small units of storage called “thin device extents.” A round-robin mechanism is used to balance the allocation of data device extents across all of the data devices in the pool that are enabled and that have remaining unused capacity. The thin device extent size is twelve 64 KB tracks (768 KB).When a read is performed on a thin device, the data being read is retrieved from the appropriate data device in the storage pool to which the thin device is bound.Virtual Provisioning thin devices are supported for use with all Open Systems platforms that are qualified for connectivity to EMC Symmetrix DMX and V-Max disk arrays. EMC Symmetrix Fully Automated Storage Tiering (FAST), automates tiered storage strategies by moving workloads between Symmetrix tiers as performance characteristics change over time. FAST performs system reconfiguration, improving performance and reducing costs, while maintaining service levels.

Fully Automated Storage Tiering (FAST)Designed to work in standard provisioned, non-thin, environments FAST automates the identification of data volumes for the purposes of relocating application data across different performance/capacity tiers within an array. FAST proactively monitors workloads at the volume level in order to identify “busy” volumes that would benefit from being moved to higher performing drives. FAST also identifies less “busy” volumes that could be relocated to higher capacity drives, without existing performance being affected. This promotion/demotion activity is based on policies that associate a storage group to multiple drive technologies, or RAID protection schemes, based upon the performance requirements of the application contained within the storage group. Data movement executed during this activity is performed non-disruptively, without affecting business continuity and data availability.FAST uses three distinct algorithms when determining the appropriate tier for a device. The algorithms, in order of probability, are:EFD promotion/demotion algorithmCapacity-based algorithmFC/SATA cross-tier algorithmThe goal of the EFD promotion/demotion algorithm is to maximize Flash drive utilization within the array. When complete, the algorithm will have listed all the devices in the array in order of which devices would be best served being configured on EFD. FAST will then attempt to place those devices onto Flash drives. The goal of the capacity-based algorithm is to enforce the FAST policy storage usage rules. A storage group is considered to be in

violation when a higher percentage of devices exist on a tier than is configured in the policy for that tier. The goal of the FC/SATA cross-tier algorithm is to balance utilization across Fibre Channel and SATA technologies. Devices are sorted by disk service time, and the most utilized devices will be moved to the least utilized disks. If Optimizer is also enabled on the Symmetrix, then the traditional Optimizer algorithm will be used to balance load within a physical disk group.There are two methods by which a device will be relocated to another tier: swap or move. A swap occurs when there is no unconfigured space in the target tier, and results in a corresponding device being moved out of the target tier. In order to preserve data on both devices involved in the swap, a single DRV is used. A move occurs when unconfigured space exists in the target tier. Only one device is involved in a move, and a DRV is not required. Symmetrix metadevices are moved as a complete entity—metadevice members may not exist in different physical disk groups.Management and operation of FAST is provided by EMC Symmetrix Management Console (SMC), as well as the EMC Solutions Enabler Command Line Interface (SYMCLI).

Virtual LUNSymmetrix Virtual LUN Technology enables tiered storage strategies by allowing manual “re-tiering” of data as its value changes over time. Symmetrix Virtual LUN assists with system reconfiguration, performance improvement and consolidation efforts while maintaining service levels. Virtual LUN technology, enhanced with Enginuity 5874 for the Symmetrix V-Max Series, enables transparent, nondisruptive data mobility among storage tiers within the same array and between RAID protection schemes.Virtual LUN technology offers two types of data movement: migration to unconfigured space and migration to configured space. In each case, the migration provides users the ability to move data between high-performance drives and high-capacity drives, or to populate newly added drives, with full inter-RAID flexibility.Virtual LUN technology is supported for both open system and mainframe devices, and includes support for metavolumes. Virtual LUN technology is fully interoperable with all other Symmetrix replication technologies – SRDF, TimeFinder/Clone, TimeFinder/Snap, and Open Replicator. Virtual LUN migrations can be managed via the Symmetrix Management Console (SMC) graphical interface, or the Solutions Enabler Command Line Interface (SYMCLI).

Solutions EnablerEMC Solutions Enabler is software that provides a host with SYMAPI (Symmetrix Application Programming Interface), CLARAPI (CLARiiON Application Programming Interface) and STORAPI (Storage Application Programming Interface) shared libraries for use by Solutions Enabler applications. Solutions Enabler was developed by EMC for storage, system, and database administrators, and systems engineers. It provides a specialized library of UNIX-formatted commands, and supports command line entries and scripts to perform configuration, control, and management operations on devices and data objects in EMC storage environments. Solutions Enabler software supports both open systems and mainframe operating systems.Example Solutions Enabler operations;Set array-wide metrics.Control operations on array devices and ports.Device creation, device provisioning (for host allocation), and creation of device pools for thin provisioning.Fully automated storage tiering (FAST).Optimize array performance.Manage QOS (Quality of Service) metrics.Perform virtual LUN migration tasks.Solutions Enabler software is accompanied with every EMC storage array (Symmetrix/CLARiiON) that is sold. This is a critical piece of software and fully compatible

with either Symmetrix Enginuity or CLARiiON Flare. Enginuity and Flare are the intelligent underlying software that drives the storage array operating platform.

Symmetrix Management ConsoleSymmetrix Management Console (SMC) is a browser-based user interface designed for configuring and managing Symmetrix arrays. It was developed to concurrently support all the features of Enginuity™ Version 5671 and later.SMC presents the functionality of the Solutions Enabler SYMCLI (command line interface) in a browser interface. SMC is used to perform the following functions;Manage Symmetrix access controls, user accounts, and permission rolesDiscover Symmetrix arraysPerform configuration operations (create devices, map and mask devices, set Symmetrix attributes, set device attributes, set port flags, create SAVE device pools)Manage devices (change device configuration, set device status, reserve devices, duplicate devices, create/dissolve metadevices)Manage Fully Automate Storage Tiering (FAST), virtual provisioning, and Auto-provisioning GroupsPerform and monitor replication operations (TimeFinder®/Mirror, TimeFinder/Snap, TimeFinder/Clone, SRDF®, Open Replicator)Monitor alertsMonitor an application’s performanceSymmetrix Management Console can manage storage related operations from device creation and provisioning to features such as, FAST, replication configuration and monitoring. SMC manages physical and virtual storage. SMC operates on Symmetrix arrays in Mainframe, Open Systems and iSeries environments. SMC manages up to ten Symmetrix DMX and/or V-Max units, and up to 80,000 storage volumes.SMC deploys a client/server model where it can be installed in local or remote locations. In a local installation, the SMC software is installed on the same system as the SYMAPI (Symmetrix Application Programming Interface) server. In a remote installation, the SMC software is installed on a system that is connected to the SYMAPI server. The ‘SYMAPI server’ and ‘base’ license keys are required as part of the installation for use with SMC, and a Java runtime environment must be enabled on the client browser. SMC is also available as a virtual appliance for the ESX v3.5 (and later) in the VMware infrastructure.

Symmetrix Performance AnalyzerEMC Symmetrix Performance Analyzer (SPA) is a browser-based tool used to perform historical trending and analysis of Symmetrix array performance data. SPA was developed to work with the Symmetrix Management Console (SMC). The SPA interface can open in its own web window from the SMC menu, or on its own. SPA adds an optional layer of data collection, analysis, and presentation tools to the SMC implementation. You can use SPA to:Set performance thresholds and alertsView high frequency metrics as they become availablePerform root cause analysisView graphs detailing system performanceDrill down through data to investigate issuesMonitor performance and capacity over timeSPA also provides a “fast lane” to display possible performance road blocks with one click, and includes export and print capability for all data graphs.

Symmetrix Features for MainframeFlashCopy SupportSymmetrix arrays running Enginuity 5772 and earlier support FlashCopy channel commands through use of z/OS host emulation package that runs as a started task. Symmetrix arrays running Enginuity 5773 and later have support in Enginuity itself. In other words, a FlashCopy channel command is sent to the array where the command is executed by Enginuity.

ESCON supportEnterprise Systems Connection (ESCON) is a fiber-optic connection technology that interconnects mainframe computers, workstations and network-attached storage devices across a single channel, and supports half duplex data transfers. ESCON may also be used for handling Symmetrix Remote Data Facility (SRDF) remote links.FICON supportFiber Connection (FICON) is a fiber-optic channel technology that extends the capabilities of its previous fiber optic channel standard, ESCON. Unlike ESCON, FICON supports full duplex data transfers and enables greater throughput rates over longer distances. FICON uses a mapping layer based on technology developed for Fibre Channel and multiplexing technology, which allows small data transfers to be transmitted at the same time as larger ones. With Enginuity release level 5670 and later, Symmetrix storage systems support FICON ports. With the Enginuity service release 5874.207, V-Max supports 8 Gb FICON connectivity (FICON Express8).Fibre Channel supportFibre Channel is a supported option with z/VM and z/Linux.Extended Address VolumeThe ability to utilize volumes that are greater than 65,000 cylinders was provided in z/OS 1.10. EMC Symmetrix V-max arrays utilizing Enginuity 5874.207 support EAVs.

Symmetrix DMX series systems

DMX800 DMX1000 DMX2000 DMX3000standard 19inch scalable rack single-bay dual-bay triple-bay

disk drives 8-120 64-144 128-288 289-576Raw capacity 17.2 Tb 21Tb 42Tb

84Tb[73.5Tb usable]

FC drive ports 8 or 16 [2Gb/s]

16-48 [2Gb/s]

16-96 [2Gb/s] 64 [2Gb/s]

EC IO ports up to 16 [2Gb/s]or FICON ports up to 4 upto 24 upto 48 upto 32

Global memory 4-64Gb 4-128 8-256

upto 256GB

Symmetrix DMX-2 model Symmetrix DMX-2 descriptionDMX1000-M2 High-performance, single-bay system with single-phase powerDMX1000-P2 Ultra-performance, single-bay system with single-phase powerDMX2000-M2 High performance, dual-bay system with single-phase powerDMX2000-M2-3 High-performance, dual-bay system with three-phase powerDMX2000-P2 Ultra-performance, dual-bay system with single-phase powerDMX2000-P2-3 Ultra-performance, dual-bay system with three-phase powerDMX3000-M2-3 High-performance, three-bay system with three-phase power

The Symmetrix DMX800 hardware architecture & Enginuity operating environment are the foundation for the Symmetrix storage platform, which consists of the following:

◆ Symmetrix scalable hardware components◆ Enginuity-based operating environment functions◆ EMC Solutions Enabler Applications Program Interfaces (APIs)◆ Symmetrix-based applications◆ Host-based Symmetrix applications◆ Independent Software Vendor (ISV) applicationsThe relationships among these software layers (and Symmetrix hardware) are illustrated in Figure

Enginuity services Enginuity provides the following services for the Symmetrix systems:◆ Independently manages system resources to intelligently optimize performance across a wide range of I/O requirements.◆ Ensures system availability through advanced fault monitoring, detection, and correction capabilities, and provides concurrent maintenance and serviceability features.◆ Interrupts and prioritizes tasks from microprocessors, for example, ensures that fencing off failed areas takes precedence over other operations.◆ Offers the foundation for specific software features available through EMC’s disaster recovery, business continuance, and storage management software.◆ Provides functional services for both its host Symmetrix systems and for a large suite of EMC storage application software.◆ Defines priority of each task including basic system maintenance, I/O processing, application processing (for example, EMC ControlCenter®, SRDF®, TimeFinder®, and EMC ControlCenter Symmetrix Optimizer).◆ Provides uniform access through APIs for internal calls and provides an external interface to allow integration with other software providers and ISVs.

EMC Solutions Enabler APIs are the storage management programming interfaces that provide an access mechanism for managing the Symmetrix system, third-party storage, switches, and host storage resources. They enable the creation of storage management applications that don’t have to understand the management details of each piece within the total storage environment.