Need XSAN Consultation

mbrooksher's picture

We are in dire need of an XSAN consultant or at least pointed in the right direction. I believe our setup to be very small (2 client) and this would be a cake walk for someone with XSAN experience.

Anyone up for it?

mbrooksher's picture

Just to give more info.

We have an xServe with 3 xServe Raids (15TB in all). We upgraded our video editing client machines and since the OS is obviously the latest and we can't upgrade the xServe to the latest it's all more or less useless right now.

However, we do have a 27" iMac that's an extra machine that would make a great replacement for now. It has thunderbolt and we have a Promise Sanlink (thunderbolt to fibre card) hooked up to it.. It has the latest Mac OS server on it and ready to go, I just have no idea where to even start in getting the raids mounted to it instead of the old xServe.

abstractrude's picture

mbrooksher

I can offer help for free here at Xsanity. Or I can offer paid consulting offline, either way works. I am located in Hollywood/Los Angeles area. Send me a private message and we can talk if you are interested.

-Trevor Carlson
THUMBWAR

mbrooksher's picture

abstractrude wrote:
mbrooksher

I can offer help for free here at Xsanity. Or I can offer paid consulting offline, either way works. I am located in Hollywood/Los Angeles area. Send me a private message and we can talk if you are interested./quote

I sent you a PM!

mbrooksher's picture

abstractrude wrote:
mbrooksher

I can offer help for free here at Xsanity. Or I can offer paid consulting offline, either way works. I am located in Hollywood/Los Angeles area. Send me a private message and we can talk if you are interested./quote

I still need to send you our network setup and get a quote from you on new gear. In the mean time, I was able to back up ALL data and start fresh. This is a newbie question I have for you since obviously this is the first time I've setup xSan w/ xServe RAIDS from scratch... Hopefully someone can answer this for me quickly so I can be on my way to being set back up for now:

QUESTION: What exactly is a Metadata Array? After I did the data backup and to start over, I deleted all Array's and started over fresh. I now have 3 xServe Raids with 7 drives on each side (no empty slots). I created 6 Array's (7 drives on each side x 3 xserve raids = 6) with RAID 5... then I got to reading that I'm on the right track, however, I should have configured a few of the drives for RAID 1 Metadata Array?

Please help :)

abstractrude's picture

This really isnt the place to discuss quotes or anything like that. Anyway, metadata is where information about the filesystem is stored. Think of it as a small place where pointers are stored for clients accessing the filesystem. Only your controllers need to actually see this lun as transactions done here by the acting controller are reported to the clients over the metadata network segment.

RAID 1 is preferred because there is no advantage to using RAID 5 for metadata. Some people use multiple RAID 1 luns in their metadata pools or RAID 10. Optimal simple configuration would be setting up two units with 7 drive RAID 5 on both side. Creating a RAID 1 on your final Xserve raid and using the rest as hot spares. As for the remaining 7 disk side of the xserve raid, well I would personally carve that off as direct attached HFS+ storage. You can also build another storage pool, but based on your question I high recommend not doing this.

-Trevor Carlson
THUMBWAR