Difference between revisions of "Talk:Vblade - ATA over Ethernet"

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==Comparision==
 
==Comparision==
This isn't really a fair comparision for cost at all, after all the Coraid's devices are SATA and Gigabit Ethernet optimized.  
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This isn't really a fair comparision for cost at all, after all Coraid's devices are SATA and Gigabit Ethernet optimized.  
also the first comparision (package solution) is a load distributed solution providing a 10gb upstream connection aggregated, so it's quite superior to 19 kurobox/linkstations
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But still it's a fun comparision to see what opensource hardware and software can get you.
But still it's a fun comparision to see what opensource hardware and software can get you. The second comparision is probably a bit fairer.  
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===15 blades no included hard drives===
 
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15 blades x 750GB = max 11.25TB
'''Number 1'''
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====Coraid====
#19 blades x 750GB = max 14.25TB
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'''Number 2'''
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#15 blades x 750GB = max 11.25TB
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===Number 1===
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19 (4+15) blades (no included hard drives)
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*[http://www.coraid.com/purchase.html Package - CLN20 + SR1520]
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*'''Total: $6195'''
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vs
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*19 [http://www.revogear.com/ Kuro Box HG WR]
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*19 x $149 each = $2831
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*[http://www.pricegrabber.com/search_techspecs_full.php/masterid=6335751 Linksys SRW2024 24-Port 10/100/1000 Gbit Switch with Webview]
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* $395
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*'''Total: $3226'''
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<font color=red>'''Open Source Saves you $2969'''</font>
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===Number 2===
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15 blades no included hard drives
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*[http://www.coraid.com/purchase.html SATA Storage - SR1520]
 
*[http://www.coraid.com/purchase.html SATA Storage - SR1520]
*'''Total: $3996'''
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**'''Total: $3996'''
  
*15 [http://www.revogear.com/ Kuro Box HG WR]
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====Kurobox + Netgear Switch====
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*15 [http://www.revogear.com/ Kuro Box HG WR] vblades
 
*15 x $149 each = $2235
 
*15 x $149 each = $2235
 
*[http://www.pricegrabber.com/search_techspecs_full.php/masterid=2682577 NETGEAR GS116 16-port Gigabit Switch 10/100/1000 Mbps]
 
*[http://www.pricegrabber.com/search_techspecs_full.php/masterid=2682577 NETGEAR GS116 16-port Gigabit Switch 10/100/1000 Mbps]
 
* $167
 
* $167
*'''Total:$2402'''
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**'''Total:$2402'''
  
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===Savings===
 
<font color=red>'''Open Source Saves you $1594'''</font>
 
<font color=red>'''Open Source Saves you $1594'''</font>
  
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As I said certainly not a fair comparison, the Coraid hardware is different (SATA vs PATA) and optimized from a ethernet switching standpoint vs the Kurobox/Linkstation.
 
As I said certainly not a fair comparison, the Coraid hardware is different (SATA vs PATA) and optimized from a ethernet switching standpoint vs the Kurobox/Linkstation.
 
    
 
    
But still a savings of between $1600-$2700 is nothing to sneeze at!  
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But still a savings of $1600 is nothing to sneeze at!  
  
 
- [[User:Ramuk|Ramuk]] 23:57, 27 August 2006 (EDT)
 
- [[User:Ramuk|Ramuk]] 23:57, 27 August 2006 (EDT)
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At 1000Mb/s / 8bits/Byte / 15 kuroboxes = 8.33 MB/Sec needed in transfer rate per kurobox RAIDed together to completely soak a 1Gb/s ethernet connection. Seems like it could be doable expecially with XFS....hmmmmmmmm
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- [[User:Ramuk|Ramuk]] 02:17, 28 August 2006 (EDT)
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==My Setup==
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#USB Drive
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##I bricked my LS when trying to mount an internal partition the first time I tried this, so I used a usb drive this time around. Which on my LinkStation was <tt>/dev/sda1</tt> - [[User:Ramuk|Ramuk]]
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#My Client
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##In this case I have a [[w:Pentium III|PIII]]/600 [[w:Compaq_Armada|Compaq Armada]] laptop running [[w:Ubuntu (Linux distribution)|Ubuntu]] Dapper Drake. - [[User:Ramuk|Ramuk]]
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==Transfer speeds==
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*Very interesting indeed.  Mounting a 20 GB [[w:USB|USB]] 2.0 [[w:External_hard_drive|External Drive]] over a [[w:100baseT|100baseT]] switch using the  StarPort software from Rocket Division Software on a Windows XP computer I was able to get a sustained 4 Megabyte/sec or 32 MB/s transfer rate..... not too bad.  I'll have to try it with a EXT3 block device and a Unix computer. [[User:Ramuk|Ramuk]] 01:36, 29 August 2006 (EDT)
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*EXT3 - Slightly dissapointing, however one would have to know what leveraging several of these devices together would get you.  Using my ubuntu laptop attached via a [[w:100baseT|100baseT]] switch,  transferring a 300Mb file I got about a 5Mb/s sustained transfer rate. Which does correlate well with Coraid's suggestion of 5-6Mb/s per blade.  So 15 of these devices in a Level 5 raid array should produce (14*5*8) = 560MB/s transfer rate, which is about half the bandwidth of a Gigabit 1000MB/s switch.  02:01, 29 August 2006 (EDT)

Latest revision as of 06:01, 29 August 2006

Comparision

This isn't really a fair comparision for cost at all, after all Coraid's devices are SATA and Gigabit Ethernet optimized. But still it's a fun comparision to see what opensource hardware and software can get you.

15 blades no included hard drives

15 blades x 750GB = max 11.25TB

Coraid

Kurobox + Netgear Switch

Savings

Open Source Saves you $1594

Conclusion

As I said certainly not a fair comparison, the Coraid hardware is different (SATA vs PATA) and optimized from a ethernet switching standpoint vs the Kurobox/Linkstation.

But still a savings of $1600 is nothing to sneeze at!

- Ramuk 23:57, 27 August 2006 (EDT)

At 1000Mb/s / 8bits/Byte / 15 kuroboxes = 8.33 MB/Sec needed in transfer rate per kurobox RAIDed together to completely soak a 1Gb/s ethernet connection. Seems like it could be doable expecially with XFS....hmmmmmmmm

- Ramuk 02:17, 28 August 2006 (EDT)


My Setup

  1. USB Drive
    1. I bricked my LS when trying to mount an internal partition the first time I tried this, so I used a usb drive this time around. Which on my LinkStation was /dev/sda1 - Ramuk
  2. My Client
    1. In this case I have a PIII/600 Compaq Armada laptop running Ubuntu Dapper Drake. - Ramuk

Transfer speeds

  • Very interesting indeed. Mounting a 20 GB USB 2.0 External Drive over a 100baseT switch using the StarPort software from Rocket Division Software on a Windows XP computer I was able to get a sustained 4 Megabyte/sec or 32 MB/s transfer rate..... not too bad. I'll have to try it with a EXT3 block device and a Unix computer. Ramuk 01:36, 29 August 2006 (EDT)
  • EXT3 - Slightly dissapointing, however one would have to know what leveraging several of these devices together would get you. Using my ubuntu laptop attached via a 100baseT switch, transferring a 300Mb file I got about a 5Mb/s sustained transfer rate. Which does correlate well with Coraid's suggestion of 5-6Mb/s per blade. So 15 of these devices in a Level 5 raid array should produce (14*5*8) = 560MB/s transfer rate, which is about half the bandwidth of a Gigabit 1000MB/s switch. 02:01, 29 August 2006 (EDT)