- Community Home
- >
- Servers and Operating Systems
- >
- Operating Systems
- >
- Operating System - Linux
- >
- Re: EVA 3000 performance
Operating System - Linux
1753973
Members
7750
Online
108811
Solutions
Forums
Categories
Company
Local Language
юдл
back
Forums
Discussions
Forums
- Data Protection and Retention
- Entry Storage Systems
- Legacy
- Midrange and Enterprise Storage
- Storage Networking
- HPE Nimble Storage
Discussions
Discussions
Discussions
Forums
Forums
Discussions
юдл
back
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
- BladeSystem Infrastructure and Application Solutions
- Appliance Servers
- Alpha Servers
- BackOffice Products
- Internet Products
- HPE 9000 and HPE e3000 Servers
- Networking
- Netservers
- Secure OS Software for Linux
- Server Management (Insight Manager 7)
- Windows Server 2003
- Operating System - Tru64 Unix
- ProLiant Deployment and Provisioning
- Linux-Based Community / Regional
- Microsoft System Center Integration
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Discussion Boards
Blogs
Information
Community
Resources
Community Language
Language
Forums
Blogs
Topic Options
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО12-30-2004 05:53 PM
тАО12-30-2004 05:53 PM
EVA 3000 performance
Hello,
We have a SAN built using HP EVA3000 controllers. The storage is configured into three virtual disks (VRaid5) of size 450MB each. These virtual disks are presented to Linux servers attached to the fibre network as SCSI disks sda, sdb and sdc respectively.
HP EVA3000 product data sheet:
ftp://ftp.compaq.com/pub/products/storageworks/eva3000/5982-6587EN.pdf
The product data sheet indicates:
Sustained I/O and MB throughput: Up to 141 K IOPS and up to 335 MB/sec throughput per EVA3000 controller pair
root@node1:/mnt/eva3 20> /sbin/hdparm -Tt /dev/sdc
/dev/sdc:
Timing buffer-cache reads: 2620 MB in 2.00 seconds = 1310.00 MB/sec
Timing buffered disk reads: 496 MB in 3.00 seconds = 165.33 MB/sec-------------->>335 MB/sec throughput per controller pair. Disk /dev/sdc is served by only one controller and so the throughput is half of 335, approx 165MB/sec. Is my understanding correct?
Bonnie++ output indicates approx 66MB/s throughput for Sequential-Input--block (reads). Should not this number be close to 165MB/sec?
The Linux server is equipped with 1GB HBA- so this may not be a bottleneck. The filesystem overhead might be a factor for getting less throughput rate too. The scsi disk "sdc" is configured as Raid5 on the storage- so additional read/writes might be issued for storing parity data. Considering this overhead the actual throughput achieved might be less than 165MB/s for writes but it should be close to 165 for reads. Wouldn't it?
The SAN storage will be basically used to store lots of data files of sizes between 35-70MB and clients would copy several MB data to storage everday. How should I start to tune the storage/linux server for improving performance in my case? Please share your thoughts!
Thanks,
Raj
We have a SAN built using HP EVA3000 controllers. The storage is configured into three virtual disks (VRaid5) of size 450MB each. These virtual disks are presented to Linux servers attached to the fibre network as SCSI disks sda, sdb and sdc respectively.
HP EVA3000 product data sheet:
ftp://ftp.compaq.com/pub/products/storageworks/eva3000/5982-6587EN.pdf
The product data sheet indicates:
Sustained I/O and MB throughput: Up to 141 K IOPS and up to 335 MB/sec throughput per EVA3000 controller pair
root@node1:/mnt/eva3 20> /sbin/hdparm -Tt /dev/sdc
/dev/sdc:
Timing buffer-cache reads: 2620 MB in 2.00 seconds = 1310.00 MB/sec
Timing buffered disk reads: 496 MB in 3.00 seconds = 165.33 MB/sec-------------->>335 MB/sec throughput per controller pair. Disk /dev/sdc is served by only one controller and so the throughput is half of 335, approx 165MB/sec. Is my understanding correct?
Bonnie++ output indicates approx 66MB/s throughput for Sequential-Input--block (reads). Should not this number be close to 165MB/sec?
The Linux server is equipped with 1GB HBA- so this may not be a bottleneck. The filesystem overhead might be a factor for getting less throughput rate too. The scsi disk "sdc" is configured as Raid5 on the storage- so additional read/writes might be issued for storing parity data. Considering this overhead the actual throughput achieved might be less than 165MB/s for writes but it should be close to 165 for reads. Wouldn't it?
The SAN storage will be basically used to store lots of data files of sizes between 35-70MB and clients would copy several MB data to storage everday. How should I start to tune the storage/linux server for improving performance in my case? Please share your thoughts!
Thanks,
Raj
2 REPLIES 2
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-02-2005 08:29 PM
тАО01-02-2005 08:29 PM
Re: EVA 3000 performance
Hi,
I noticed too that bonnie++ did not fully utilize the available FC connection.
Please check by running top in addition if bonnie++ takes all available CPU time in comparision to hdparm and ensure that you use a reasonable big file for bonnie. Additional try a test where you use more than one bonnie, perhaps three in parallel.
Bye
Oli
I noticed too that bonnie++ did not fully utilize the available FC connection.
Please check by running top in addition if bonnie++ takes all available CPU time in comparision to hdparm and ensure that you use a reasonable big file for bonnie. Additional try a test where you use more than one bonnie, perhaps three in parallel.
Bye
Oli
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
тАО01-04-2005 03:45 AM
тАО01-04-2005 03:45 AM
Re: EVA 3000 performance
Data sheet always specify the maximum possible performance. Performance to the array's cache is always much faster than sustained performance to the drives, so you want to understand if your benchmarks and the specifications avoid the cache or make unrealistic use of the cache compared to your application. Performace on the EVA is always faster if you don't mirror the cache, which is generally a bad idea, but can be appropriate for certain temp files. Write performance is fastest with mirrored data, using all the disks that are possible in the array within a single vRAID group. So, to answer your question, no, I never believe you can expect to see real world performance close to the maximum rates. But to maximize performance for writes, Mirror, use the maximum number of fast disks possible in the array.
Mom 6
The opinions expressed above are the personal opinions of the authors, not of Hewlett Packard Enterprise. By using this site, you accept the Terms of Use and Rules of Participation.
News and Events
Support
© Copyright 2024 Hewlett Packard Enterprise Development LP