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back to article EMC embraces benchmarks

EMC has started getting enthusiastic about benchmarks, the latest being SPECsfs2008-nfs v3. It submitted a Celerra VG8 Gateway system - that's a NAS head sitting atop either Symmetrix VMAX or CLARiiON Fibre Channel storage. This VG8 is a bit of a monster with up to eight data movers, called X-Blades, which contain 6-core Xeon …

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WTF?

easy when you use an 4 engine vmax

looking at the configuration:-

Numbe

r of Usable

Description Disks Size

----------- ----- -------

This set of 304 FC disks is divided into 152 2-disk RAID1 pairs, 304 18.8 TB

each with 4 LUs per drive, exported as 304 logical volumes. All

data file systems reside on these disks.

This set of FC disks consists of 4 2-disk RAID1 pairs, each with 2 8 900.0

LUs per drive, exported as 8 logical volumes. These disks are GB

reserved for Celerra system use.

Total 312 19.7 TB

The drives were configured as 152 RAID1 pairs. 38 RAID1 pairs were assigned to

each Symmetrix VMAX engine. Each RAID1 pair had 6 LUNS created on it, of which

only 1 LUN was used per RAID1 pair. 4 stripes were created, one per 38 RAID1

pair group with a stripe element of 32K. 4 file systems were created, 1 per

stripe. A Symmetrix VMAX engine provided access to the drives of 1 file system.

All 4 file systems were mounted on the Celerra Data Mover. All 4 file systems

were exported by the Celerra Data Mover. Each client mounted all 4 file systems

through each network interface of the Celerra.

looking a bit further into the bill of materials:-

Item No Qty Type Vendor Model/Name Description

1 1 Enclosure EMC VG8-DME0 Celerra VG8 empty Data Mover add on enclosure

2 1 Enclosure EMC VG8-DME1 Celerra VG8 empty Data Mover add on enclosure

3 2 Data Mover EMC VG8-DM-8A Celerra VG8 Data Mover, 8 GbE ports, 4 FC ports

4 1 Control station EMC VG8-CSB Celerra VG8 control station (Administration only)

5 2 Software EMC VG8-UNIX-L Celerra VG8 UNIX License

6 1 Intelligent Storage Array Engine EMC SB-64-BASE Symmetrix VMAX Base Engine, 64 GB Cache

7 3 Intelligent Storage Array Engine EMC SB-ADD64NDE Symmetrix VMAX Add Engine, 64 GB Cache

8 16 FE IO Module EMC SB-FE80000 Symmetrix VMAX Front End IO Module with multimode SFP's

9 32 Drive Enclosure EMC SB-DE15-DIR Symmetrix VMAX Direct Connect Storage Bay, Drive Enclosure

10 304 FC Disk SEAGATE NS4154501B Symmetrix VMAX Cheetah 450 GB 15K.6 4 Gbit/s FC Disks

11 8 FC Disk SEAGATE NS4154501B Symmetrix VMAX Cheetah 450 GB 15K.6 4 Gbit/s FC Disks

12 4 Standby Power Supply EMC SB-DB-SPS VMAX Standby Power Supply

13 1 FC Switch EMC EMC DS-5100B 40 port Fibre Channel Switch

so in reality they short stroked the drives significantly presenting less than an 1/3 of the useable TB. No doubt the backend was the bottleneck as they had a half populated VMAX behind this would like to see the cost of that factored in. No doubt to get the throughput with all 7 blades they would need an additional 2 or 3 VMAXs.

What a footprint in the datacenter that will be!

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