IBM System Storage™ DS3000 Series Jüri Joonsaar 30.10.2008 Tartu

DS3000 Series IBM System Storage DS3200 SAS host interface disk system iSCSI host interface disk system IBM System Storage DS3400 FC host interface disk system

DS3000 Series - Common Features 2U enclosure supporting up to 12 SAS and/or SATA drives Online capacity expansion up to 48 drives with EXP3000s Dual-active RAID controllers with mirrored, battery-backed cache Redundant, hot-swappable components Telco model supports -48v DC power supplies Supports tiered storage with SAS and SATA intermix support Intuitive DS3000 Storage Manager software Support for up to 32 Storage Partitions Support for FlashCopy and VolumeCopy

DS3000 Enclosures DS3200, DS3300 or DS3400 DS3200 DS3300 DS3400 Controllers SAS and/or SATA drives DS3300 DS3400 Power/cooling

DS3200 – A Closer Look One or three 3-Gbps SAS host ports per controller Each port is a 3-Gbps x4 “wide” link Ethernet management port SAS host ports SAS expansion port Power Supply / Cooling Diagnostics port for servicing 3 SAS host port per controller model

DS3300 – A Closer Look Two 1-Gbps iSCSI host ports per controller Ethernet management port SAS expansion port Power Supply / Cooling Disabled SAS port Diagnostics port for servicing

DS3400 – A Closer Look Two 4-Gbps FC host ports per controller Ethernet management port FC host ports SAS expansion port Power Supply / Cooling Disabled SAS port Diagnostics port for servicing

DS3000 Host Cabling DS3200 DS3300 DS3400 Direct attach Direct attach IP SAN attach FC SAN attach

DS3000 Storage Manager Based on 6th generation DS4000 Storage Manager code Recovery Guru and email diagnostic alerts Task-oriented user interface is intuitive and simple Initial Setup Tasks dialog box provides six steps to setting up the disk system Supports RAID levels 0, 1, 3, 5, 6 and 10 Summary page is the “landing page” providing an “at-a-glance” portal-view of the system

Benefits of Premium Features Storage Partitioning Allows the sharing of capacity across multiple servers User can define which server(s) can have access to specific data FlashCopy Supports utilization of separate data copies, for a variety of uses such as hot backups or application testing No affect to production data – remains online accessible Instantaneous VolumeCopy Allows for redistribution of data from older, slower disk drives to faster and/or higher capacity drives Optimizes application performance and/or capacity Complete separate physical copy of data that can be used for analysis or testing with no effect on production data

What is Storage Partitioning? A logical unit consisting of one or more volumes that can be accessed by a single host or shared among hosts One or more volumes are mapped to an individual host or host group This volume-to-LUN mapping defines what host or host group will have access to the volume Partition access is maintained at the controller level LUN 1 2 Logical partition A Logical partition B Logical partition C unmapped volumes Host A Host B Host Group C

A point-in-time image can be created in seconds What is FlashCopy? A point-in-time (PiT) image of a logical drive Logical equivalent of a physical copy Features: Instantaneous copy Requires less disk space than a full copy Map-able to any host Can be read from, or written to Primary uses: PiT backup image File restoration Data mining / analysis Base Logical Drive Physical FlashCopy Logical Drive Repository Logical C’ A B C A point-in-time image can be created in seconds

Fast copy of data with no server cycles What is VolumeCopy? Complete (byte-by-byte) PiT replication of one logical drive (source) to another (target) within a storage system Target logical drive also referred to as a clone Eliminates I/O contention on the primary logical drive Primary uses: Full PiT data set available for analysis, mining, testing, backup Migrating data between storage tiers Production Server Analysis Server PiT Clone Source logical drive Volume Copy Fast copy of data with no server cycles

Selecting A Drive Type Understand customer’s requirements Highest performance or highest utilization. Best $/GB or balanced price/performance. Understand application requirements Highest IOPS or highest MB/s. Heavy usage data or static data. Understand drive characteristics Time to data Data transfer rate The most important thing you can do is understand the customer requirements. All decisions start with this basic knowledge. Are they looking for the highest performance, or the highest utilization? Are the looking for the best price per gigabyte, or the balanced price / performance? Many times, these are configuration opposites. Customers always want it all, but it’s important for them to understand that there are often trade-offs. It’s also important to understand the customer’s application. Is it transactional and therefore requires good IOPS performance? Or is it bandwidth-oriented requiring throughput performance? Is the application data static and rarely accessed? Or does it see heavy usage? Additionally, you need to know which drive is best suited to meet the customer’s requirements, and the application’s requirements. FC and SATA drive are very difference, so understanding how specifications such as time to data, data transfer rate and command queuing are important relate to performance is very important. Now that we’ve asked all the questions, let’s look at some answers.

Understanding Performance Two primary metrics IOPS Measures random, small-block I/O Transactional applications such as OLTP, databases, Exchange MB/s Measures sequential, large-block I/O Data-intensive applications such as rich media, 3D modeling, simulation, high performance computing

IOPS IOPS measures random, small-block I/O Key drive-based performance enablers: Seek time, latency, rotational velocity, command queuing, number of drives IOPS performance is heavily dependent on the number and type of disk drives SAS drives have faster seek time, lower latency, faster rotational velocity, and better command queuing compared to SATA Drive-limited configurations can result in similar performance between systems with very different maximum capabilities FC SAS SATA

Throughput MB/s measures sequential large-block I/O Key drive-based performance enablers: Data transfer rate, maximum I/O transfer size, command queuing Throughput rates are heavily dependent on the internal controller bandwidth Maximum throughput rates can typically be reached with a small number of disk drives SATA delivers about 66% of SAS’s drive-level performance FC SAS SATA

Application Access Patterns Read intensive Write intensive I/O intensive Throughput intensive Random access Sequential access OLTP ● Data warehouse System (SCP) File serving Medical imaging Web / Internet Multimedia / video Document imaging Virtualization CAD/CAM Backup / recovery Revisiting our application access patterns table, and factoring in what we’ve learned about SAS and SATA drives, we’ll be able to figure out which drives are best suited for various application based on their typical data access patterns. For IOPS applications with I/O intensive, random access workloads, FC drives are far and away the best choice. For bandwidth applications with throughput intensive, sequential access workloads, SATA drives are often an acceptable option. MB/s

Application Access Patterns IOPS are best served by SAS drives Read intensive Write intensive I/O intensive Throughput intensive Random access Sequential access OLTP ● Data warehouse System (SCP) File serving Medical imaging Web / Internet Multimedia / video Document imaging Virtualization CAD/CAM Backup / recovery Revisiting our application access patterns table, and factoring in what we’ve learned about FC and SATA drives, we’ll be able to figure out which drives are best suited for various application based on their typical data access patterns. For IOPS applications with I/O intensive, random access workloads, FC drives are far and away the best choice. For bandwidth applications with throughput intensive, sequential access workloads, SATA drives are often an acceptable option. MB/s an option for SATA drives

Tiered Storage Solution of Choice The DS3000 series can cost effectively support an organization’s entire range of data capacity requirements in a single disk system Drive type Throughput RPM Capacity SAS 3 Gbps 15,000 73 GB 146 GB 300 GB SATA 7,200 500 GB 750 GB 1.0 TB* * Excludes BladeCenter Boot Disk System

Performance Comparisons DS3200 DS3300 DS3400 Random Performance - IOPS Cache-Based Reads 92,000 64,000 110,000 Disk-Based Reads Disk-Based Writes Throughput Performance – MB/s Drives Used for Benchmark 48 Notes: 1. SAS Drives, benchmarked with dual controllers 2. Performance results achieved under ideal circumstances in a benchmark test environment. Actual customer results will vary based on configuration and infrastructure components.

Performance Comparisons DS3200 DS3300 DS3400 Random Performance - IOPS Cache-Based Reads 92,000 64,000 110,000 Disk-Based Reads 22,000 Disk-Based Writes 4,500 4,200 Throughput Performance – MB/s Drives Used for Benchmark 48 Disk performance about equal Notes: 1. SAS Drives, benchmarked with dual controllers 2. Performance results achieved under ideal circumstances in a benchmark test environment. Actual customer results will vary based on configuration and infrastructure components. Beware, this is “best case.” In the real world, unless you have dedicated infrastructure, you will find somewhat slower IOPS, due to iSCSI network contention.

Performance Comparisons DS3200 DS3300 DS3400 Random Performance - IOPS Cache-Based Reads 92,000 64,000 110,000 Disk-Based Reads 22,000 Disk-Based Writes 4,500 4,200 Throughput Performance – MB/s 1,450 455 1,600 900 380 925 320 300 Drives Used for Benchmark 48 Disk Reads ~ 42% Notes: 1. SAS Drives, benchmarked with dual controllers 2. Performance results achieved under ideal circumstances in a benchmark test environment. Actual customer results will vary based on configuration and infrastructure components.

DS3000 Interoperability Matrix DS3000 MTMs & Options covered by the matrix What comes in the box with the system Supported HW & SW options by DS3000 MTM Operating System Support Server Support HBA Support Fabric Support HDD Support Available ServicePac Options