SPECsfs2008_nfs.v3 Result

Throughput (ops/sec) Response (msec) 13521 0.9 27056 1.0 40730 1.2 54289 1.4 67857 1.7 81592 2.0 95206 2.4 108604 2.8 122448 3.6 135521 4.6

Tested By	EMC Corporation
Product Name	Celerra VG8 Server Failover Cluster, 2 Data Movers (1 stdby) / Symmetrix VMAX
Hardware Available	August 2010
Software Available	August 2010
Date Tested	July 2010
SFS License Number	47
Licensee Locations	Hopkinton, MA

The Celerra VG8 Gateway Server system is a consolidation of file-based servers with NAS (NFS, CIFS) applications configured in an 1+1 High-Availability cluster. The servers deliver network services over high-speed Gigabit Ethernet. The cluster tested here consists of one active Data Mover that provides 8 Jumbo-frame capable Gigabit Ethernet interfaces and one stand-by Data Mover to provide high availability. The Celerra VG8 is a gateway to Shared Storage Array Symmetrix VMAX. The Symmetrix VMAX is a storage architecture using 4 VMAX engines interconnected via a set of multiple active 4 Gbit/s FC HBAs connecting to the fabric.

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

OS Name and Version	DART 6.0.36.2
Other Software	EMC Celerra Control Station Linux 2.6.18-128.1.1.6005.EMC
Filesystem Software	Celerra UxFS File System

Name	Value	Description
ufs syncInterval	22500	Timeout between UFS log flushes
file asyncThresholdPercentage	80	Total cached dirty blocks for NFSv3 async writes
ufs cgHighWaterMark	131071	Defines the system's high water mark for the number of CG entries in CG cache
ufs inoBlkHashSize	170669	Inode block hash size
kernel autoreboot	600	Delay until autoreboot
ufs updateAccTime	0	Disable access time updates
ufs nFlushDir	64	Number of UxFS directory and indirect blocks flush threads
file prefetch	0	Disable DART read pre-fetch
ufs inoHighWaterMark	65536	Number of dirty inode buffers per filesystem
nfs thrdToStream	16	Number of NFS flush threads per stream
ufs inoHashTableSize	1000003	Inode hash table size
kernel maxStrToBeProc	32	Number of network streams to process at once
ufs nFlushIno	96	Number of UxFS inode blocks flush threads
ufs nFlushCyl	64	Number of UxFS cylinder group blocks flush threads
nfs nthreads	6	Number of threads dedicated to serve nfs requests
nfs withoutCollector	1	Enable NFS-to-CPU thread affinity
file dnlcNents	12500000	Directory name lookup cache size
nfs ofCachesize	1080000	NFS openfile cache size
file cachedNodes	1536000	filesystem vnodes cache size
tcp backlog	128	Connection limit for a given port
nfs start nfsd	4	Number of NFS daemons

Server Tuning Notes

Description	Number of Disks	Usable Size
This set of 304 FC disks is divided into 152 2-disk RAID1 pairs, each with 4 LUs per drive, exported as 304 logical volumes. All data file systems reside on these disks.	304	18.8 TB
This set of FC disks consists of 4 2-disk RAID1 pairs, each with 2 LUs per drive, exported as 8 logical volumes. These disks are reserved for Celerra system use.	8	900.0 GB
Total	312	19.7 TB

Number of Filesystems	4
Total Exported Capacity	19234 GB
Filesystem Type	UxFS
Filesystem Creation Options	Default
Filesystem Config	Each filesystem is striped (32 KB element size), across 76 disks (304 logical volumes) for fs1 fs2 fs3 and fs4
Fileset Size	15806.5 GB

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.

Item No	Network Type	Number of Ports Used	Notes
1	Jumbo Gigabit Ethernet	8	This is the Gigabit network interface used for the active Data Mover.

Network Configuration Notes

All Gigabit network interfaces were connected to a Cisco 6509 switch.

An MTU size of 9000 was set for all connections to the switch. Each Data Mover was connected to the network via 8 ports. The LG1 class workload machines were connected with one port.

Item No	Qty	Type	Description	Processing Function
1	1	CPU	Single socket Intel Six Core Westmere 2.8 GHz VG8 with QPI speed 6400 MHz for each Data Mover server. 1 chip active for the workload. (1 standby not in the quantity)	NFS protocol, UxFS filesystem

Processing Element Notes

Each Data Mover has one physical processor.

Description	Size in GB	Number of Instances	Total GB	Nonvolatile
Each Data Mover main memory. (24 GB in the standby Data Mover not in the quantity)	24	1	24	V
Symmetrix VMAX storage array battery backed global memory. (64 GB per Symmetrix VMAX engine)	64	4	256	NV
Grand Total Memory Gigabytes			280

Memory Notes

The Symmetrix VMAX was configured with a total of 256 GB of memory. The memory is backed up with sufficient battery power to safely destage all the cached data onto the disk in the event of a power failure.

4 NFS file systems were used. Each RAID1 pair had 4 LUs bound on it. Each file system was striped over a quarter of the logical volumes. The storage array had 8 Fibre Channel connections, 4 per Data Mover. In this configuration, NFS stable write and commit operations are not acknowledged until after the storage array has acknowledged that the related data has been stored in stable storage (i.e. NVRAM or disk).

The system under test consisted of one Celerra VG8 Gateway Data Mover attached to a Symmetrix VMAX Storage Array with 8 FC links. The Data Movers were running DART 6.0.36.2. 8 GbE Ethernet ports on the Data Mover were connected to the network.

Failover is supported by an additional Celerra Data Mover that operates in stand-by mode. In the event of the Data Mover failure, the standby unit takes over the function of the failed unit. The stand-by Data Mover does not contribute to the performance of the system and it is not included in the components listed above.

Item No	Qty	Vendor	Model/Name	Description
1	18	Dell	Dell PowerEdge 1850	Dell server with 1 GB RAM and the Linux 2.6.9-42.ELsmp operating system

LG Type Name	LG1
BOM Item #	1
Processor Name	Intel(R) Xeon(TM) CPU 3.60GHz
Processor Speed	3.6 GHz
Number of Processors (chips)	2
Number of Cores/Chip	2
Memory Size	1 GB
Operating System	Linux 2.6.9-42.ELsmp
Network Type	1 x Broadcom BCM5704 NetXtreme Gigabit Ethernet

Benchmark Parameters

Network Attached Storage Type	NFS V3
Number of Load Generators	18
Number of Processes per LG	32
Biod Max Read Setting	5
Biod Max Write Setting	5
Block Size	AUTO

Testbed Configuration

LG No	LG Type	Network	Target Filesystems	Notes
1..18	LG1	1	/fs1,/fs2,/fs3,/fs4	N/A

Load Generator Configuration Notes

All filesystems were mounted on all clients, which were connected to the same physical and logical network.

Each client has the same file systems mounted from the active Data Mover.

Failover is supported by an additional Celerra Data Mover that operates in stand-by mode. In the event of the Data Mover failure, the standby unit takes over the function of the failed unit. The stand-by Data Mover does not contribute to the performance of the system and it is not included in the components listed above.

The Symmetrix VMAX was configured with 256 GB of memory, 64 GB per VMAX engine. The memory is backed up with sufficient battery power to safely destage all cached data onto the disk in the event of a power failure.

• Config Diagram