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IMHO DCIG Got it Wrong: The Facts on Data Domain DD9500

Ever read one of those marketing papers covering data sheets and claiming a competitive advantage? Recently, I read just such a paper comparing Oracle’s ZFS Storage ZS4-4 appliance to EMC’s Data Domain DD9500. In this blog we will dispel spooky inaccuracies.

Picture showing maximum throughput for ZS4-4 (42 TB/hr) and Data Domain with DD Boost (58.7 TB/hr)

Data Domain maximum throughput with DD Boost is 58.7 TB/hour: 28% faster than the ZS4-4 appliance!

Take a look at EMC’s Data Domain Deduplication Storage Systems specifications.

What’s DD Boost?

DD Boost for RMAN enables database servers to communicate with Data Domain Systems in an optimized way, without the need for a backup application. Use of DD Boost for RMAN improves performance while reducing data transferred over the LAN.

Without DD Boost the maximum throughput is 27.7 TB/hour but most Oracle customers use DD Boost so the maximum increases to 58.7 TB/hr. 

Higher data reduction rates then deduplication can achieve

Comparing the ZS4-4 to EMC Data Domain is like comparing apples to pumpkins. The paper references an Oracle database feature called Hybrid Columnar Compression (HCC) which the ZS4 supports. For databases using HCC great, all other databases useless.

Data Domain cuts infrastructure costs with high-speed, variable-length deduplication that reduces your storage requirements by 10-30x.

Data Domain's Global Deduplication Applies to All Data and Not to Just a Subset of Databases

ALL data is deduplicated providing infrastructure savings across ALL backups!

Global Deduplication Design

EMC’s Data Domain appliance is able to achieve true regular deduplication, global target deduplication, and global deduplication. It will dedupe all data types under the same deduped block pool of 4KB to 128KB chunks. Every disk shelf added to the Data Domain simply expands the unique block store; no block will be written again to another active shelf. This global deduplication will yield the highest deduplication rates and thus achieve the highest cost savings.

Learn more: Guidelines for Selecting Purpose-Built Backup Appliances

High Availability

Competitors like to point to Data Domain’s single controller configuration and skip over it’s Data Invulnerability Architecture.

End-to-end verification means reading data after it is written and comparing it to what was sent to disk. End-to-end verification confirms data is correct and recoverable from every level of the system.

Fault avoidance and containment is the next step in protection. Data Domain makes sure the data, which was verified to be correct, stays correct. New data never overwrites good data.

Data Domain's Data Invulnerability Architecture Includes End-to-end Verification, Fault Avoidance & Containment, Continuous Fault Detection & Healing, and more

Data Domain was built with the purpose of protecting your critical data.

Continuous fault detection and healing protects data from hardware faults. Data Domain’s operating system builds in extra levels of data protection to detect faults and recover on the fly to ensure successful data restore operations. Fault detection and healing features include

RAID 6: Double disk failure protection

On-the-fly error detection and correction

Scrub to insure data doesn’t go bad

File system recoverability

And more!


Learn more: EMC Data Domain Data Invulnerability Architecture: Enhancing Data Integrity

Data Domain DD7200 with DD Boost backs up a 20 TB Oracle 12c database over a one 10 Gb Ethernet connection in one hour!

Graph Showing Data Domain with DD Boost for Oracle RMAN Performance Test

The first bar shows just over six hours for the initial full database backup. Initial full backups will take longer as all the data is sent to Data Domain for protection. The subsequent full backups took approximately one hour thanks to DD Boost deduplication and had an ingest rate of 22.25 TB per hour!

Learn More: Oracle RMAN Backup From EMC XtremIO to EMC Data Domain Using EMC Data Domain Boost

In the same test the average nightly dedupe rate was 26X and the storage savings of 7X!

Graph Showing Recent Data Domain with DD Boost for RMAN Dedup & Capacity Savings

After the first full backup DD Boost achieved an average deduplication rate of 26X meaning faster backup times as less data needs to be ingested. In the study the database increased in size 2.5% every day to simulate real-world data growth. Even with daily growth a consistent space savings of 7.1X was achieved. Space savings like this decreases backup infrastructure requirements and facility costs while enabling the DBA to keep more database backups.

More Flexible

A snapshot in the ZS4 is a read-only copy of the database. Clones are writeable copies but need to be created from a snapshot. Erase the complexities by using XtremIO and VMAX3

In recently published white paper EMC showed XtremIO creating 192 copies of Oracle databases. The physical space used 13TB was a fraction of the logical space used 1650TB. XtremIO inline compression and deduplication provide big space savings to the business.

In situations like production down or significant loss of application functionality instantaneous copies can be critically important. In an upcoming paper EMC shows taking a copy of production and opening the database copy took just 13 seconds.

With the ZS4 a snapshot then clone would be required: time consuming and complex.

Picture Showing XtremIO Savings in Creating 192 Copies of Oracle Databases. Used Physical Capacity was a Fraction of Used Logical Capacity.

EMC is a leader in storage and protection solutions. The ZS4 is a master of none.

The VMAX3 uses Timefinder SnapVX to create writable or read-only copies of databases. Database copies can be space efficient meaning no initial space required or the DBA has the flexibility to create full copies. Any database copies created with SnapVX will not impact production performance.

Learn more about XtremIO All-Flash arrays.

Learn more about the VMAX3 Cloud Data Platform

Data Domain and DD Boost Integrations

Enterprise operational management calls for comprehensive protection solutions encompassing a wide array of integrations. Accelerating the protection of several applications and allowing the business to continue to use existing tools drives greater value and less operational complexity. 

Data Domain Competitive Advantages

Table Summarizing Key Findings in this Blog

Data Domain with DD Boost for Oracle has a better maximum throughput rate and logical storage capacity than the ZS4-4. Combine the greater throughput and logical storage capacity with the comprehensive integrations it’s easy to see why Data Domain’s enterprise protection is a leader. 

Comparing maximums shows Data Domain is the Performance Protection Leader!

Magic Quadrant for Enterprise Backup Software and Integrated Appliances

Download a copy of this blog! 

Take the Elevator to All-Flash or Not: Flexibility to Choose