Openfiler Hardware

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We use these ones(4 way) on our p400(SAS drives) isn't the P400 SAS(3GB) and SATA150?

 

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Think I''m going to cry if it's SATA150

 

Soz Sly but according to this page it is , like I said we use it for SAS drives and its great for them

 

Zeb, forgot to ask mate take it you run your openfiler with 1 Hardware RAID card using SATA disk's? If so what RAID configuration do you use and what is the performance like running all them VM's at once as I would of thought they would run like a dog with the performance of SATA. Just want to get an idea of what I can run at once on a similar setup.

 

RAID 5 ftw and if the likes of NetApp and EMC use SATA in their SAN solutions I don't honestly think you will have much to worry about.

 

It just seems a hell of a lot of VM's to run and normal SATA drives. Saying that i can't imagine I would be running more than 6 VM's at anyone time. I would of thought there would be a bottleneck even in a RAID 5 config.

 

SATA RAID5, five drives. Using only three or four performance is dreadful with SATA disks. It would probably be better with SCSI, but that's too expensive for what I need. I still don't get much in the way of IOPS, but I don't really mind that as it's only my home environment.

 

That's why the likes of IOMeter or CrystalDiskMark are out there, they allow you to test your throughput to determine if you do have the right setup.

However trust me, your SATA disks will be fine for what you want to do with it (I even have a 4200rpm disk based HP 2510p running 4 vms and whilst it's initially slow to launch it soon speeds up when the machines are running).

Generally speaking there are two tiers of storage used in SANS, you have the SAS\FC based disks used for high IO through put (Exchange \ SQL) and you have the SATA based disks used for general fileshare or VM's. SATA isn't that slow, especially if you get the faster 10000rpm disks but even 7200rpm disks are just as good with the right controllers.

 

Interesting post Simon. I'm just about to move away from 7.2k SATA disks for my VMFS at work - the I/O on them is lousy and we hit them pretty hard with the 60-odd servers I have on there. I'm moving to 15k SAS - IOmeter shows I'll gain an improvement of well over 250% over the old SAN.

 

The place I worked at last year implemented a NetApp SAN, they got their two tiers of storage and the tier 1 stuff was only for the Exchange and SQL servers, the Tier 2 was for the rest (including an Enterprise Vault). Now maybe that's because the controller in the NetApp was decent but they never really worried about the throughput on the tier 2 storage. Infact they got a second SATA shelf in the form of a Nexsan Sataboy to use as their DPM Storage Pool and they were backing up Exchange and SQL servers every 15 minutes on that.

 

Ahh right I just thought SATA was a big no-no in a business environment. Cheers for the info mate.

 

Zeb, cheers for the reply mate much appreciated