slowbiznatch
Gawd
- Joined
- Oct 24, 2001
- Messages
- 856
deleted.
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Thank you.agrikk said:That's some kind of massive list of [h]ardware. I'm jealous.
Though I can't believe that you are building a massive computing environment and you are using SATA for storage.
What is the application that you plan on running? With RAID-5 SATA arrays, It looks like you are going to be primarily storage, right?
The storage space on all CMUs will be used as swap space. If the array fails, the failed drive can be replaced, the array rebuilt, and node reimaged in the matter of minutes. All data is stored on the RAID5 units.unhappy_mage said:
Customer-supplied tape backup units. I have no information on these, but I'm sure they do a good job.ambit said:What's backing up the RAID units?
175 Kilowatts per hour.The Donut said:If you ever need to be rid of them for space or heat reasons, my house could use a logical heatsource.. Don't tell my wife though!
~175 KW/Hslowbiznatch said:175 Kilowatts per hour.
Not terribly sure about the amount of heat it puts off
This all makes me wonder why your compute nodes even have OS drives. Why not just PXE boot your OS completely? I mean, I'm sure you aren't running Windows on the damn thing, so you should be able to boot your minimal OS from PXE easily enough. With the clusters I've built here, we were able to get our entire boot image in a 7MB squashfs image plus a 1MB kernel. There's no need for disks, at all.slowbiznatch said:They are all in RAID 0 because data integrity is not an issue with compute nodes. All data is stored in redundant RAID5 arrays. To rebuild the OS on a compute node, the node is PXE booted to the control node and a 15 digit (type of node_node name) command is typed at the console to begin the auto-install.
Swap space.Wolf31o2 said:This all makes me wonder why your compute nodes even have OS drives. Why not just PXE boot your OS completely? I mean, I'm sure you aren't running Windows on the damn thing, so you should be able to boot your minimal OS from PXE easily enough. With the clusters I've built here, we were able to get our entire boot image in a 7MB squashfs image plus a 1MB kernel. There's no need for disks, at all.